Relevant bibliographies by topics / Group III metal complexes

Academic literature on the topic 'Group III metal complexes'

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Published: 10 March 2023
Last updated: 11 March 2023

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Journal articles on the topic "Group III metal complexes"

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Pelmuş, Marius, Erik N. Carrión, Christopher Colomier, Jenyffer Santiago, and Sergiu M. Gorun. "Group III perfluoroalkyl perfluoro phthalocyanines." Journal of Porphyrins and Phthalocyanines 20, no. 08n11 (August 2016): 1401–8. http://dx.doi.org/10.1142/s1088424616501157.

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We report the synthesis, redox and photo-physical properties, as well as singlet oxygen reactivity of the first representatives of Group III perfluoroalkyl perfluoro metal phthalocyanines, gallium and indium complexes. Microwave-assisted synthesis was used to produce F[Formula: see text]PcM, M [Formula: see text] Ga, In in reasonable yields. Both Ga and In complexes exhibit high thermal and chemical stability properties, attributed to the perfluoroalkyl perfluoro phthalocyanine ligand. Electrochemical and spectroelectrochemical measurements show reversible redox processes for both compounds, including spontaneous re-oxidations following electrochemical or photochemical reductions. No electrochemical or chemical oxidations of the neutral complexes are observed. Photo-hydroperoxidation of ([Formula: see text]-(-)-citronellol occurs with rates of 13.5 and 1.7 [Formula: see text]mol O2 min[Formula: see text] mol[Formula: see text] Pc and substrate turnovers of 225 and 28.2 mmol ([Formula: see text]-Cit s[Formula: see text] mol[Formula: see text] Pc for the In and Ga complexes, respectively. The solid state materials are stable and can be sublimed at temperatures higher than 380°C. Related complexes are candidates for similar chemistry and photophysics based on the observation that the fluorinated ligand determines most of the favorable properties.
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Patel, Dipti, and Stephen T. Liddle. "f-Element-metal bond chemistry." Reviews in Inorganic Chemistry 32, no. 1 (June 1, 2012): 1–22. http://dx.doi.org/10.1515/revic.2012.0001.

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AbstractCompared to the overwhelming prevalence of f-element-carbon, -nitrogen, -oxygen or -halide ligand linkages, the use of metal-based fragments as ligands is underdeveloped. This contrasts directly to the extensively developed fields of d- and p-block metal-metal complexes, which are still burgeoning. This review outlines the development of compounds that possess polarised covalent f-element-metal bonds. For this review, the f-element is defined as (i) a group 3 metal; (ii) a lanthanide metal; (iii) the actinide metals thorium or uranium. The metal is defined as: (i) a d-block transition metal; (ii) a group 13 metal (aluminium or gallium); (iii) a group 14 metal (silicon, germanium or tin); (iv) a group 15 metal (antimony or bismuth) metal. Although silicon, germanium and antimony are traditionally classified as metalloids, they are included for completeness. We focus on complexes that have been structurally authenticated by single crystal X-ray diffraction, and we highlight novel aspects of their syntheses, properties and reactivities.
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Wang, Bei-Bei, Huiping Zuo, John Mack, Poulomi Majumdar, Tebello Nyokong, Kin Shing Chan, and Zhen Shen. "Optical properties and electronic structures of axially-ligated group 9 porphyrins." Journal of Porphyrins and Phthalocyanines 19, no. 08 (August 2015): 973–82. http://dx.doi.org/10.1142/s108842461550073x.

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A series of group 9 metal tetra-(p-tolyl)-porphyrin ( M(ttp) , M = Co(II) , Rh(III) , Ir(III)) complexes with axial phenyl substituents have been synthesized and characterized. An aryl bromide cleavage reaction of transition metal complexes was used to prepare the complexes from Co(ttp) , Rh(ttp) Cl and Ir(ttp)COCl , respectively. Magnetic circular dichroism (MCD) spectroscopy and TD-DFT calculations have been used to study trends in the optical spectra and electronic structures. The effect of introducing different para-substituents on the phenyl substituents was examined. During fluorescence emission studies, phosphorescence was observed for the Ir(III) complexes in the near infrared (NIR) region.
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Pysarevska, Solomiya, Liliya Dubenska, Ivan Spanik, Jaroslav Kovalyshyn, and Sofia Tvorynska. "Reactions of o,o′-Dihydroxy Azo Dyes with the Third Group M(III) Ions: A Spectroscopic and Electrochemical Study." Journal of Chemistry 2013 (2013): 1–10. http://dx.doi.org/10.1155/2013/853763.

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The reactions of some metal ions of the third group (M(III)) with azo dyes were studied. Attention was focused on azo dyes with two hydroxy groups inortho-positions to azo group: eriochrome red B (ERB), eriochrome black T (EBT), eriochrome blue SE (EBSE), calcon (Calc), and kalces (KLC). The chelation is responsible for interaction of these dyes with Al(III), Sc(III), rare earth elements (REE) ions, Ga(III), and In(III). The complexes were studied using vis- and IR-spectrometry. One irreversible peak (P1) of complexes reduction was observed on voltammograms for all studied metal ions. The second peak P2 was observed only for Ga complexes with all investigated azo dyes. Based on the study, the possible mechanism of complexes reduction was proposed. Linear behavior has been found between the reduction peak currents of a set of metal complexes and the concentration of the respective metal cations. This can be used for metal ions determination by voltammetric methods.
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Halder, Kalpataru, and Utpal Saha. "Synthesis and Evaluation of Cr (III), Mn (III) and Fe (III) Schiff Base of Metals Complexes." Journal of Drug Delivery and Therapeutics 9, no. 3 (May 15, 2019): 114–16. http://dx.doi.org/10.22270/jddt.v9i3.2609.

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A novel synthesized Schiff base metal complexes Cr (III), Mn (III) and Fe (III) of 2-hydroxy-5-chloro acetophenone 2-imino-4-phenyl thiazole were prepared by condensed from 2-hydroxy-5-chloro acetophenone and 2-amino-4-phenyl thiazole have been synthesized and characterized on the basis of elemental analysis, Infrared, 1H NMR, molar conductance and magnetic susceptibilities analysis. The Schiff base acts as a monobasic bidentate ligand commonly coordinates through the oxygen atom of phenolic OH group and the nitrogen atom of azomethine group, which is confirmed by IR spectral data. All the metal complexes have studies thermal properties and their thermal parameter. Keyword: Schiff base, Magnetic, Thermal studies.
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Oldenburg, Karin, and Arnd Vogler. "Electronic Spectra and Photochemistry of Tin(II), Lead(II), Antimony(III), and Bismuth(III) Bromide Complexes in Solution." Zeitschrift für Naturforschung B 48, no. 11 (November 1, 1993): 1519–23. http://dx.doi.org/10.1515/znb-1993-1109.

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The electronic spectra of bromo complexes of main group metal ions with an s2 electronic configuration (SnBr3-, PbBr3-, PbBr42-, SbBr4-, SbBr63-, BiBr4-, BiBr63-) in acetonitrile show long-wavelength absorption bands which are assigned to metal-centered sp transitions. Compared to the corresponding chloro complexes the sp bands of the bromo complexes appear at longer wavelength due to sp/LMCT mixing (LMCT = ligand-to-metal charge transfer). As a result of this mixing the luminescence which originates from low-energy sp excited states is much weaker than that of the chloro complexes. Moreover, some of the bromo complexes (e.g. BiBr4-) undergo a photochemical redox decomposition induced by LMCT excitation.
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Zhang, Zaihui, T. L. Thomas Hui, and Chris Orvig. "One-pot synthesis of N-substituted-3-hydroxy-4-pyridinone chelate complexes of aluminum, gallium, and indium." Canadian Journal of Chemistry 67, no. 11 (November 1, 1989): 1708–10. http://dx.doi.org/10.1139/v89-263.

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A series of tris(3-hydroxy-2-methyl-4-pyridinonato)metal(III) and tris(3-hydroxy-6-hydroxymethyl-4-pyridinonato)metal(III) complexes have been prepared in water by one-pot synthesis directly from maltol and kojic acid, respectively, and the metal ion (M = Al, Ga, In) with an appropriate amine. The pyridinones have substituents at the ring nitrogen atom (CH3, C2H5). The tris(3-hydroxy-4-pyronato)metal(III) complexes are formed insitu and these undergo nucleophilic attack by the primary amine; the appropriate tris(3-hydroxy-4-pyridinonato)metal(III) complexes are obtained. This method bypasses the sequential syntheses of ligand and metal complex, and has improved the yields of the tris(ligand)metal complexes, in particular by making them much more easily accessible. The electronic effects of binding the pyrone to the metal ions and of the substituents on the pyrone ring on the reactivity are discussed. Keywords: 3-hydroxy-4 pyridinone complexes, group 13 metal ions, one-pot synthesis.
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Mansoor Ahmed Zi Ning Lei, Mansoor Ahmed Zi Ning Lei, Mohsin Ali Mohsin Ali, Syed Imran Ali Syed Imran Ali, Konatsu Kojima Konatsu Kojima, Pranav Gupta Pranav Gupta, Majid Mumtaz Majid Mumtaz, Dong Hua Yang Dong Hua Yang, and Syed Moazzam Haider and Zhe Sheng Chen Syed Moazzam Haider and Zhe Sheng Chen. "Synthesis, Characterization and Anticancer Activity of Isonicotinylhydrazide Metal Complexes." Journal of the chemical society of pakistan 41, no. 1 (2019): 113. http://dx.doi.org/10.52568/000706/jcsp/41.01.2019.

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This study focuses characterization of iron (II), iron (III), cobalt (II), copper (II) and nickel (II) complexes of Isoniazid (INH) and studying their spectroscopic as well as physiochemical properties. FTIR studies showed that INH binds the metal from oxygen of carbonyl group and nitrogen of amino group. The proton NMR spectra of the metal complexes confirmed the conversion of ligand molecules into their respective metal complexes. However, pattern of splitting and shapes of peaks was observed but the protons resonated in the expected region. XRD patterns may be concluded that the complexes are mostly comprised of nano-sized particles behaving like amorphous materials. Scanning electron microscopy (SEM) revealed marked changes in the morphology of complexes, and their degradation at higher temperature strengthens the hypothesis of the successful formation of complexes. The MTT cytotoxicity assay was used for the screening these complexes against four human cell lines but the results did not prove significant.
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Tchertanov, L., and C. Pascard. "Statistical Analysis of Noncovalent Interactions of Anion Groups in Crystal Structures. III. Metal Complexes of Thiocyanate and their Hydrogen-Donor Accepting Function." Acta Crystallographica Section B Structural Science 53, no. 6 (December 1, 1997): 904–15. http://dx.doi.org/10.1107/s0108768197008549.

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The bidentate function of the thiocyanate anion was studied using the Cambridge Structural Database System. Complexing properties (metal–thiocyanate interactions) with respect to metal cations were analysed. Two main classes were distinguished: (a) alkali and alkaline earth metals, and (b) metals of Zn and Cu groups and transition metals (group VIII). Good correlations were found between the nature of the metal (radius, oxidation state and charge) and its position relative to the thiocyanate unit. Hydrogen-bond acceptor properties of discrete and complexed SCN units were compared. The extraordinarily active hydrogen-bonding behaviour allows this anion to act as a powerful bridge between different molecular fragments. In metal complexes the cation provokes a redistribution of anionic charge in SCN and the distribution of electron density, in turn, controls the hydrogen-bonding properties of the terminal acceptor atom. Binding properties of thiocyanate in biological systems were illustrated using the Brookhaven Protein Data Bank. A comparison of anion binding in small-molecule structures and in macromolecular structures shows good agreement.
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D'Elia, Valerio, Jérémie D. A. Pelletier, and Jean-Marie Basset. "Cycloadditions to Epoxides Catalyzed by Group III-V Transition-Metal Complexes." ChemCatChem 7, no. 13 (May 25, 2015): 1906–17. http://dx.doi.org/10.1002/cctc.201500231.

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Dissertations / Theses on the topic "Group III metal complexes"

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Caporale, Angelamaria. "Synthesis of novel ligands for the stabilization of organometallic complexes having potential antitumor activity." Doctoral thesis, Universita degli studi di Salerno, 2016. http://hdl.handle.net/10556/2191.

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2014 - 2015
The design of new metal complexes as anticancer agents has received considerable interest in recent years. Complexes of titanium (e.g.: titanocene dichloride), lanthanides complexes (e.g.: texaphyrrins lanthanide) and carbenic complexes of gold, silver and copper showed significant biological activity, and have progressed into clinical trials. Thus, the target of this PhD project are the synthesis of new ligands and metal complexes. Firstly 5 cyclopentadienyl pro-ligands were synthesised: 6-phenylfulvene, 6-(p-metoxyphenyl)-fulvene e 6- (3',4'-dymethoxyphenyl)fulvene, 6-(3',5')-dymethoxyphenyl)fulvene and 6-(2',4')- dymethoxyphenyl)fulvene. Then, the synthesis of 12 novel scandium, yttrium and neodymium complexes with these cyclopentadienyl ligands was carried out. The complexes were tested on DU146 (Prostatic carcinoma) and MDA.MB213 (Breast cancer) to verify inhibition of cell-proliferation, using MTT test with standard procedures. All the complex showed a strong concentration-dependent ability of inhibiting the growth tumor cell, referring to antiblastic activity. [edited by author]
XIV n.s.
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Popham, Michael Charles. "Complexes of Group III metal salts and titanium halides with tertiary pnictogen oxide and crown ether ligands." Thesis, University of Southampton, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274472.

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Le, Mest Yves. "Etude des propriétés électrochimiques de biporphyrines de type "face-à-face" : réactivité des dérives du cobalt vis-à-vis de l'oxygène." Brest, 1988. http://www.theses.fr/1988BRES2013.

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Webb, Kevin James. "Sterically hindered chalcogenolato complexes of group IIB metals." Thesis, University of East Anglia, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.316298.

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Pounds, Thomas John. "Redox group-functionalised diphosphine complexes." Thesis, University of Liverpool, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367302.

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Gash, Rosslyn Clare. "Metal haloalkyl in complexes in catalysis." Thesis, University of St Andrews, 1993. http://hdl.handle.net/10023/14706.

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In this thesis, the preparation of a number of halomethyl complexes of rhodium, platinum, and palladium is described. Complexes of the type trans-[Rh(CH2X)X(P4)]+ (X = Cl, Br, I, P = PMe3, dmpe) were found to be unstable, decomposing in situ to give a mixtures of dihalo, trihalo, and phosphine ylide species. Platinum and palladium species of the type trans-M(CH2X)X(PEt3)2 (X = Cl, I, M = Pt, Pd), which were formed by the reaction between M(PEt3)3 CH2XY were also unstable. In the case of platinum, phosphine ylide species were isolated from reaction mixtures, whilst the palladium halomethyl species decomposed over a number of days to give dihalide complexes. However, palladium iodomethyl species prepared via reactions involving 2 moles of phosphine per mole of metal were found to be stable. Neutral rhodium halomethyl complexes were also found to be far more stable than their cationic counterparts. The synthesis and characterisation of trans-RhCl(CO)(CH2l)I(P)2/ (P = PMe3, PEt3, or Et2PPh), prepared by oxidative addition of CH2I2 to RhCl(CO)(P)2 is described. When less basic phosphines (such as PPh3) or the sterically hindered phosphine PCy3 were used, no evidence of any reaction between the rhodium complex and the CH2I2 was observed. The molecular structure of trans-RhCl(CO)(CH2l)I(PEt3)2 has been studied by X-ray diffraction analysis. This complex proved to be inert to substitution at the iodomethyl carbon atom by neutral nucleophiles such as H2O, CH3OH, and PEts, but prone to substitution by Cl-. The lability of iodomethyl (and chloromethyl) ligands towards CO insertion has also been studied. There is evidence to suggest that an iodoacyl platinum complex may form in solution after the complex cis-Pt(CH2l)I(PPh3)2 had been left under 1 atm CO for 24 hours. However, in the case of trans-Pd(CH2l)I(PCy3)2 this same reaction took 7 days under 70 atm pressure of CO. All of the rhodium iodomethyl complexes prepared were also inert to CO insertion at ambient temperature and 1 atm CO, but excellent evidence for CO insertion having taken place in irflns-RhCl(CO)(CH2l)I(PEt3)2 was observed at 70°C and 35 atm of CO. Evidence for CO insertion into a rhodium-chloromethyl bond was also observed under the more forcing conditions of 100°C and 70 atm CO. This insertion reaction may prove to be extremely useful in catalytic systems. A report of some preliminary catalytic studies involving the production of diethylmalonate from CH2I2 and C2-products from the hydroformylation of (CH2O)[sub]n under very mild conditions is also presented. It is thought that these catalytic reactions proceed via carbonyl insertion into a rhodium-iodomethyl bond.
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Harding, David James. "Redox-active group 6 transition metal alkyne complexes." Thesis, University of Bristol, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324328.

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Bell, Michael Niall. "Organometallic platinum group metal complexes incorporating macrocyclic ligands." Thesis, University of Edinburgh, 1987. http://hdl.handle.net/1842/13895.

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Campbell, Michael Glenn. "Synthesis, Structure, and Reactivity of New Palladium(III) Complexes." Thesis, Harvard University, 2014. http://dissertations.umi.com/gsas.harvard:11289.

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Palladium is one of the most common and versatile transition metals used in modern organometallic chemistry. The chemistry of palladium in its 0, +II, and +IV oxidation states is well-known; by comparison, the chemistry of palladium in its +III oxidation state is in its infancy. The work in this thesis involves the study of previously unknown Pd(III) complexes, including applications in materials chemistry and catalysis.
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Parsons, Teresa L. "Technetium(V), Rhenium(V), and Technetium(III) complexes /." free to MU campus, to others for purchase, 1997. http://wwwlib.umi.com/cr/mo/fullcit?p9840026.

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Books on the topic "Group III metal complexes"

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W, Buchler J., ed. Metal complexes with Tetrapyrrole Ligands III. Berlin: Springer, 1995.

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Webb, Kevin James. Sterically hindered chalcogenolato complexes of group IIB metals. Norwich: University of East Anglia, 1992.

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Lane, H. P. Transition metal complexes of group fifteen donor ligands. Manchester: UMIST, 1994.

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Main Group and Transition Metal Complexes Supported by Carbon, Sulfur, and Selenium Donor Ligands. [New York, N.Y.?]: [publisher not identified], 2018.

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Corden, Jonathan P. The study and synthesis of Group 4 transition metal complexes in Ziegler-Natta catalysis. [s.l.]: typescript, 1997.

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Rauch, Michael S. Main Group Metal Hydride, Alkyl and Fluoride Complexes: Towards CO2 Functionalization with Earth Abundant Metals. [New York, N.Y.?]: [publisher not identified], 2019.

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Main Group and Transition Metal Complexes Supported by Multidentate Tripodal Ligands that Feature Nitrogen, Oxygen and Sulfur Donors: Synthesis, Structural Characterization and Appliations. [New York, N.Y.?]: [publisher not identified], 2013.

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Metal Complexes with Tetrapyrrole Ligands III. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/bfb0111329.

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Buchler, J. W. Metal Complexes with Tetrapyrrole Ligands Iii. Buchler J W, 2013.

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Manuta, David Mark. Photochemistry and photophysics of group VIB metal tetracarbonyl complexes. 1985.

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Book chapters on the topic "Group III metal complexes"

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Crabtree, Robert H. "Sigma Bonds as Ligand Donor Groups in Transition Metal Complexes." In The Chemical Bond III, 63–77. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/430_2015_175.

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Chipperfield, J. R. "By Reactions of Other Transition-Metal Complexes with Group-IIB Derivatives." In Inorganic Reactions and Methods, 389–92. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470145289.ch171.

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Bolshakov, G. F., and Z. T. Dmitrieva. "A MECHANISM OP SUPERMOLECULAR STRUCTURE FORMATION SUGGESTED FOR POLYASSOCIATED COMPLEXES OF GROUP I, III METAL ALKOXIDES." In Morphology of Polymers, edited by Blahoslav Sedláček, 739–46. Berlin, Boston: De Gruyter, 1986. http://dx.doi.org/10.1515/9783110858150-075.

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Paukner, A., H. Kunkely, and A. Vogler. "Photochemistry of Coordination Compounds of Main Group Metals. Reductive Elimination of Thallium(III) Complexes." In Photochemistry and Photophysics of Coordination Compounds, 205–9. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-72666-8_36.

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Dickson, Ronald S. "Functional Group Removal." In Catalysis by Metal Complexes, 168–75. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5267-6_6.

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Seino, Hidetake, and Yuji Kajita. "Group 4 Transition Metal-Dinitrogen Complexes." In Transition Metal-Dinitrogen Complexes, 79–158. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2019. http://dx.doi.org/10.1002/9783527344260.ch2.

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Duman, Leila M., and Lawrence R. Sita. "Group 5 Transition Metal-Dinitrogen Complexes." In Transition Metal-Dinitrogen Complexes, 159–220. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2019. http://dx.doi.org/10.1002/9783527344260.ch3.

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Mézailles, Nicolas. "Group 6 Transition Metal-Dinitrogen Complexes." In Transition Metal-Dinitrogen Complexes, 221–69. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2019. http://dx.doi.org/10.1002/9783527344260.ch4.

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Piascik, Adam D., and Andrew E. Ashley. "Group 8 Transition Metal-Dinitrogen Complexes." In Transition Metal-Dinitrogen Complexes, 285–335. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2019. http://dx.doi.org/10.1002/9783527344260.ch6.

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Lu, Connie C., and Steven D. Prinslow. "Group 9 Transition Metal-Dinitrogen Complexes." In Transition Metal-Dinitrogen Complexes, 337–402. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2019. http://dx.doi.org/10.1002/9783527344260.ch7.

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Conference papers on the topic "Group III metal complexes"

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Korobanova, Olga. "Group psychological phenomena and mental health preservation in complex social situations." In III INTERNATIONAL CONFERENCE ON MENTAL HEALTH CARE “Mental Health: Global challenges of XXI century”. NDSAN (MFC - coordinator of the NDSAN), 2019. http://dx.doi.org/10.32437/pscproceedings.issue-2019.ok.26.

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Okeke, Micheal, and Dong-Sheng Yang. "VIBRONIC SPECTRA OF GROUP 13 METAL-PIPERIDINE COMPLEXES." In 2021 International Symposium on Molecular Spectroscopy. Urbana, Illinois: University of Illinois at Urbana-Champaign, 2021. http://dx.doi.org/10.15278/isms.2021.tl10.

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Resch, Ute, and Knut Rurack. "Steady-state and time-resolved fluorometry of fluorescent pollutants and heavy metal complexes." In Environmental Sensing III, edited by Robert A. Lieberman. SPIE, 1997. http://dx.doi.org/10.1117/12.276139.

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Jece, Annija, Armands Ruduss, Kitija A. Štucere, Aivars Vembris, and Kaspars Traskovskis. "TADF active carbene-metal-amide complexes exhibiting through-space charge transfer: an impact of metal atom." In Organic Electronics and Photonics: Fundamentals and Devices III, edited by Sebastian Reineke, Koen Vandewal, and Wouter Maes. SPIE, 2022. http://dx.doi.org/10.1117/12.2621156.

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Petrović, Biljana. "TRANSITION METAL ION COMPLEXES AS POTENTIAL ANTITUMOR AGENTS." In 1st INTERNATIONAL Conference on Chemo and BioInformatics. Institute for Information Technologies, University of Kragujevac,, 2021. http://dx.doi.org/10.46793/iccbi21.009p.

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Discovery of the antitumor activity of platinum complex, cisplatin, cis-Pt(NH3)2Cl2, and later carboplatin and oxaliplatin, led to the intensive investigation of the potential antitumor activity of the huge number of platinum complexes. Furthermore, it is well-known that platinum complexes express toxicity, numerous side effects and resistance, so the scientists make a lot of efforts to synthetize, beside Pt(II) and Pt(IV), other non-platinum compounds with potential antitumor activity, such as Pd(II), Ru(II/III) and Au(III) complexes. The goal of this study is to summarize the results of the investigation of the interactions between some mononuclear, homo- and hetero-polynuclear Pt(II), Pd(II), Ru(II/III) and Au(III) complexes with different sulfur- and nitrogen-donor biologically relevant nucleophiles. Among mononuclear complexes, the compounds with aromatic terpy (tepyridine) or bpma (bis-(2- pyridylmethyl)amine) and aliphatic dien (diethylentriamine) nitrogen-containing inert ligands were studied. Different homo- and hetero-polynuclear complexes with pz (pyrazine) or 4,4’-bipy (4,4’- bipyridine) as bridging and mostly en (ethylenediamine), bipy (2,2’-bipyridine) and dach (trans-1,2- diaminocyclohexane) as inert ligands were studied as well. The research was focused on the connection between the structure and the mechanisms of interactions with different biomolecules, such as L- cysteine (L-Cys), L-methionine (L-Met), tripeptide glutathione (GSH), guanosine-5’-monophosphate (5’-GMP), DNA and bovine serum albumin (BSA). Some of these complexes were selected for in vitro studies of the cytotoxicity on different tumor cell lines. Observed results contribute a lot as a guidance for the future design and determination of the structure-activity relationship (SAR) of different transition metal ion complexes.
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Zommere, Margarita Anna, Kirills Dmitrijevs, Žanis Sisojevs, Kaspars Traskovskis, Valdis Kokars, and Aivars Vembris. "Optical and electroluminescence studies of original iridium metal complexes with aromatic staking effect." In Organic Electronics and Photonics: Fundamentals and Devices III, edited by Sebastian Reineke, Koen Vandewal, and Wouter Maes. SPIE, 2022. http://dx.doi.org/10.1117/12.2621809.

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Kodzasa, Takehito, Hirobumi Ushijima, Hiro Matsuda, and Toshihide Kamata. "Third-order nonlinear optical property of platinum group metal complexes with square planar configurations." In Organic Thin Films for Photonic Applications. Washington, D.C.: Optica Publishing Group, 1997. http://dx.doi.org/10.1364/otfa.1997.the.1.

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The developments of novel materials having large third-order nonlinear optical susceptibility χ(3) and fast response give a considerable interest as the key subjects for future optoelectronic technology. It was proved in former researches that the large low dimensional delocalization field for optically excited electron is effective for large χ(3) value. Third-order optical nonlinearities of many materials, mainly inorganic semiconductors or organic conjugated polymers, have been investigated. Many inorganic materials have studied for their large χ(3) and thermal stability. On the other hands, organic nonlinear optical materials also have been noted, because they have advantages of fast optical response, architectural flexibility and ease of fabrication.
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Bengali, Ashfaq A., Sean M. Casey, Chun-Lin Cheng, Jonathan P. Dick, P. T. Fenn, Peter W. Villalta, and Doreen G. Leopold. "Gas-phase study of the group VI transition metal tricarbonyl complexes by negative-ion photoelectron spectroscopy." In OE/LASE '92, edited by Cheuk-Yiu Ng. SPIE, 1992. http://dx.doi.org/10.1117/12.58165.

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Xu, Chao, Yu Du, Tingting Liu, and Suliang Yang. "Extraction of Nd(III), Eu(III), Am(III) and Cm(III) With 6-Carboxylic Di(2-Ethylhexyl) Amide Pyridine." In 2022 29th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/icone29-90818.

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Abstract Solvent extraction has been widely used in spent fuel reprocessing because of its advantages such as high mass transfer rate, short production cycle, easy operation and large extraction capacity. The ligands containing soft S and N atoms usually have a good effect on the separation of trivalent lanthanides actinides. Herein, a novel extractant, 6-carboxylic di(2-ethylhexyl) amide pyridine (DEHAPA, HA), containing carboxyl and amide pyridine, was designed. The extraction of Nd(III), Eu(III), Am(III) and Cm(III), representing trivalent lanthanides and actinides, from nitric solution has been carried out by DEHAPA diluted in toluene as the organic phase. According to the slope analysis, the results show that the extraction of Ln(III) and An(III) with DEHAPA was governed by ion-exchange mechanism and the extraction equilibrium constants of Nd(III), Eu(III), Am(III) and Cm(III) have been calculated. The effect of concentration indicated that the structure of extraction complexes are 1:3/LnA3 and 1:3/AnA3. The temperature has a slight influence to distribution ratio of extraction Nd(III) and Eu(III). The infrared spectrum of DEHAPA and extracted complex analysis showed that -N-C = O and -O-C = O group coordinated with Nd(III). According to 1:3/LnA3 extracted complex structure, the Nd(III) ion in complex was coordinated with three -N-C = O, -O-C = O and pyridine group from three tridentate A− ligands by three tridentate A− ligand in organic solvent. This work reveals the unique extraction and coordination structure and provides a value reference to design more effective extraction ligands for Ln(III)/An(III) separation.
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Bhardwaj, Chandra Kant, Kapil Ghai, and Abhilasha Mishra. "Synthesis, spectral, elemental analysis & antimicrobial studies of manganese (II) and iron (III) metal complexes with alprazolam drug as ligand." In INTERNATIONAL SCIENTIFIC AND PRACTICAL CONFERENCE “TECHNOLOGY IN AGRICULTURE, ENERGY AND ECOLOGY” (TAEE2022). AIP Publishing, 2022. http://dx.doi.org/10.1063/5.0104887.

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Reports on the topic "Group III metal complexes"

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Du, Guodong. Group 4 Metalloporphyrin diolato Complexes and Catalytic Application of Metalloporphyrins and Related Transition Metal Complexes. Office of Scientific and Technical Information (OSTI), January 2003. http://dx.doi.org/10.2172/835301.

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Yan, Ka King. Synthesis of main group, rare-earth, and d{sup 0} metal complexes containing beta-hydrogen. Office of Scientific and Technical Information (OSTI), January 2013. http://dx.doi.org/10.2172/1082979.

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Qian, Y., M. J. Bedzyk, and P. F. Lyman. X-ray standing wave investigations of Group III and V metal adsorption on Si(001). Office of Scientific and Technical Information (OSTI), May 1997. http://dx.doi.org/10.2172/510296.

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Lampland, Nicole Lynn. Beyond alkyl transfer: Synthesis of main group metal (Mg, Ca, Zn) silyl and tris(oxazolinyl)borato complexes and their stoichiometric and catalytic reactions with borane Lewis acids and carbonyls. Office of Scientific and Technical Information (OSTI), May 2015. http://dx.doi.org/10.2172/1417988.

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Kanner, Joseph, Edwin Frankel, Stella Harel, and Bruce German. Grapes, Wines and By-products as Potential Sources of Antioxidants. United States Department of Agriculture, January 1995. http://dx.doi.org/10.32747/1995.7568767.bard.

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Several grape varieties and red wines were found to contain large concentration of phenolic compounds which work as antioxidant in-vitro and in-vivo. Wastes from wine production contain antioxidants in large amounts, between 2-6% on dry material basis. Red wines but also white wines were found to prevent lipid peroxidation of turkey muscle tissues stored at 5oC. The antioxidant reaction of flavonoids found in red wines against lipid peroxidation were found to depend on the structure of the molecule. Red wine flavonoids containing an orthodihydroxy structure around the B ring were found highly active against LDL and membrane lipid peroxidation. The antioxidant activity of red wine polyphenols were also found to be dependent on the catalyzer used. In the presence of H2O2-activated myoglobin, the inhibition efficiency was malvidin 3-glucoside>catechin>malvidin>resveratol. However, in the presence of an iron redox cycle catalyzer, the order of effectiveness was resveratol>malvidin 3-glucoside = malvidin>catechin. Differences in protein binding were found to affect antioxidant activity in inhibiting LDL oxidation. A model protein such as BSA, was investigated on the antioxidant activity of phenolic compounds, grape extracts, and red wines in a lecithin-liposome model system. Ferulic acid followed by malvidin and rutin were the most efficient in inhibiting both lipid and protein oxidation. Catechin, a flavonal found in red-wines in relatively high concentration was found to inhibit myoglobin catalyzed linoleate membrane lipid peroxidation at a relatively very low concentration. This effect was studied by the determination of the by-products generated from linoleate during oxidation. The study showed that hydroperoxides are catalytically broken down, not to an alcohol but most probably to a non-radical adduct. The ability of wine-phenolics to reduce iron and from complexes with metals were also demonstrated. Low concentration of wine phenolics were found to inhibit lipoxygenase type II activity. An attempt to understand the bioavailability in humans of antocyanins from red wine showed that two antocyanins from red wine were found unchanged in human urine. Other antocyanins seems to undergo molecular modification. In hypercholesterolemic hamsters, aortic lipid deposition was significantly less in animals fed diets supplemented with either catechin or vitamin E. The rate of LDL accumulation in the carotid arteries was also significantly lower in the catechin and vitamin E animal groups. These results suggested a novel mechanism by which wine phenolics are associated with decreased risk of coronary heart diseases. This study proves in part our hypothesis that the "French Paradox" could be explained by the action of the antioxidant effects of phenolic compounds found at high concentration in red wines. The results of this study argue that it is in the interest of public health to increase the consumption of dietary plant falvonoids. Our results and these from others, show that the consumption of red wine or plant derived polyphenolics can change the antioxidant tone of animal and human plasma and its isolated components towards oxidative reactions. However, we need more research to better understand bioavailability and the mechanism of how polyphenolics affect health and disease.
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Rankin, Nicole, Deborah McGregor, Candice Donnelly, Bethany Van Dort, Richard De Abreu Lourenco, Anne Cust, and Emily Stone. Lung cancer screening using low-dose computed tomography for high risk populations: Investigating effectiveness and screening program implementation considerations: An Evidence Check rapid review brokered by the Sax Institute (www.saxinstitute.org.au) for the Cancer Institute NSW. The Sax Institute, October 2019. http://dx.doi.org/10.57022/clzt5093.

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Background Lung cancer is the number one cause of cancer death worldwide.(1) It is the fifth most commonly diagnosed cancer in Australia (12,741 cases diagnosed in 2018) and the leading cause of cancer death.(2) The number of years of potential life lost to lung cancer in Australia is estimated to be 58,450, similar to that of colorectal and breast cancer combined.(3) While tobacco control strategies are most effective for disease prevention in the general population, early detection via low dose computed tomography (LDCT) screening in high-risk populations is a viable option for detecting asymptomatic disease in current (13%) and former (24%) Australian smokers.(4) The purpose of this Evidence Check review is to identify and analyse existing and emerging evidence for LDCT lung cancer screening in high-risk individuals to guide future program and policy planning. Evidence Check questions This review aimed to address the following questions: 1. What is the evidence for the effectiveness of lung cancer screening for higher-risk individuals? 2. What is the evidence of potential harms from lung cancer screening for higher-risk individuals? 3. What are the main components of recent major lung cancer screening programs or trials? 4. What is the cost-effectiveness of lung cancer screening programs (include studies of cost–utility)? Summary of methods The authors searched the peer-reviewed literature across three databases (MEDLINE, PsycINFO and Embase) for existing systematic reviews and original studies published between 1 January 2009 and 8 August 2019. Fifteen systematic reviews (of which 8 were contemporary) and 64 original publications met the inclusion criteria set across the four questions. Key findings Question 1: What is the evidence for the effectiveness of lung cancer screening for higher-risk individuals? There is sufficient evidence from systematic reviews and meta-analyses of combined (pooled) data from screening trials (of high-risk individuals) to indicate that LDCT examination is clinically effective in reducing lung cancer mortality. In 2011, the landmark National Lung Cancer Screening Trial (NLST, a large-scale randomised controlled trial [RCT] conducted in the US) reported a 20% (95% CI 6.8% – 26.7%; P=0.004) relative reduction in mortality among long-term heavy smokers over three rounds of annual screening. High-risk eligibility criteria was defined as people aged 55–74 years with a smoking history of ≥30 pack-years (years in which a smoker has consumed 20-plus cigarettes each day) and, for former smokers, ≥30 pack-years and have quit within the past 15 years.(5) All-cause mortality was reduced by 6.7% (95% CI, 1.2% – 13.6%; P=0.02). Initial data from the second landmark RCT, the NEderlands-Leuvens Longkanker Screenings ONderzoek (known as the NELSON trial), have found an even greater reduction of 26% (95% CI, 9% – 41%) in lung cancer mortality, with full trial results yet to be published.(6, 7) Pooled analyses, including several smaller-scale European LDCT screening trials insufficiently powered in their own right, collectively demonstrate a statistically significant reduction in lung cancer mortality (RR 0.82, 95% CI 0.73–0.91).(8) Despite the reduction in all-cause mortality found in the NLST, pooled analyses of seven trials found no statistically significant difference in all-cause mortality (RR 0.95, 95% CI 0.90–1.00).(8) However, cancer-specific mortality is currently the most relevant outcome in cancer screening trials. These seven trials demonstrated a significantly greater proportion of early stage cancers in LDCT groups compared with controls (RR 2.08, 95% CI 1.43–3.03). Thus, when considering results across mortality outcomes and early stage cancers diagnosed, LDCT screening is considered to be clinically effective. Question 2: What is the evidence of potential harms from lung cancer screening for higher-risk individuals? The harms of LDCT lung cancer screening include false positive tests and the consequences of unnecessary invasive follow-up procedures for conditions that are eventually diagnosed as benign. While LDCT screening leads to an increased frequency of invasive procedures, it does not result in greater mortality soon after an invasive procedure (in trial settings when compared with the control arm).(8) Overdiagnosis, exposure to radiation, psychological distress and an impact on quality of life are other known harms. Systematic review evidence indicates the benefits of LDCT screening are likely to outweigh the harms. The potential harms are likely to be reduced as refinements are made to LDCT screening protocols through: i) the application of risk predication models (e.g. the PLCOm2012), which enable a more accurate selection of the high-risk population through the use of specific criteria (beyond age and smoking history); ii) the use of nodule management algorithms (e.g. Lung-RADS, PanCan), which assist in the diagnostic evaluation of screen-detected nodules and cancers (e.g. more precise volumetric assessment of nodules); and, iii) more judicious selection of patients for invasive procedures. Recent evidence suggests a positive LDCT result may transiently increase psychological distress but does not have long-term adverse effects on psychological distress or health-related quality of life (HRQoL). With regards to smoking cessation, there is no evidence to suggest screening participation invokes a false sense of assurance in smokers, nor a reduction in motivation to quit. The NELSON and Danish trials found no difference in smoking cessation rates between LDCT screening and control groups. Higher net cessation rates, compared with general population, suggest those who participate in screening trials may already be motivated to quit. Question 3: What are the main components of recent major lung cancer screening programs or trials? There are no systematic reviews that capture the main components of recent major lung cancer screening trials and programs. We extracted evidence from original studies and clinical guidance documents and organised this into key groups to form a concise set of components for potential implementation of a national lung cancer screening program in Australia: 1. Identifying the high-risk population: recruitment, eligibility, selection and referral 2. Educating the public, people at high risk and healthcare providers; this includes creating awareness of lung cancer, the benefits and harms of LDCT screening, and shared decision-making 3. Components necessary for health services to deliver a screening program: a. Planning phase: e.g. human resources to coordinate the program, electronic data systems that integrate medical records information and link to an established national registry b. Implementation phase: e.g. human and technological resources required to conduct LDCT examinations, interpretation of reports and communication of results to participants c. Monitoring and evaluation phase: e.g. monitoring outcomes across patients, radiological reporting, compliance with established standards and a quality assurance program 4. Data reporting and research, e.g. audit and feedback to multidisciplinary teams, reporting outcomes to enhance international research into LDCT screening 5. Incorporation of smoking cessation interventions, e.g. specific programs designed for LDCT screening or referral to existing community or hospital-based services that deliver cessation interventions. Most original studies are single-institution evaluations that contain descriptive data about the processes required to establish and implement a high-risk population-based screening program. Across all studies there is a consistent message as to the challenges and complexities of establishing LDCT screening programs to attract people at high risk who will receive the greatest benefits from participation. With regards to smoking cessation, evidence from one systematic review indicates the optimal strategy for incorporating smoking cessation interventions into a LDCT screening program is unclear. There is widespread agreement that LDCT screening attendance presents a ‘teachable moment’ for cessation advice, especially among those people who receive a positive scan result. Smoking cessation is an area of significant research investment; for instance, eight US-based clinical trials are now underway that aim to address how best to design and deliver cessation programs within large-scale LDCT screening programs.(9) Question 4: What is the cost-effectiveness of lung cancer screening programs (include studies of cost–utility)? Assessing the value or cost-effectiveness of LDCT screening involves a complex interplay of factors including data on effectiveness and costs, and institutional context. A key input is data about the effectiveness of potential and current screening programs with respect to case detection, and the likely outcomes of treating those cases sooner (in the presence of LDCT screening) as opposed to later (in the absence of LDCT screening). Evidence about the cost-effectiveness of LDCT screening programs has been summarised in two systematic reviews. We identified a further 13 studies—five modelling studies, one discrete choice experiment and seven articles—that used a variety of methods to assess cost-effectiveness. Three modelling studies indicated LDCT screening was cost-effective in the settings of the US and Europe. Two studies—one from Australia and one from New Zealand—reported LDCT screening would not be cost-effective using NLST-like protocols. We anticipate that, following the full publication of the NELSON trial, cost-effectiveness studies will likely be updated with new data that reduce uncertainty about factors that influence modelling outcomes, including the findings of indeterminate nodules. Gaps in the evidence There is a large and accessible body of evidence as to the effectiveness (Q1) and harms (Q2) of LDCT screening for lung cancer. Nevertheless, there are significant gaps in the evidence about the program components that are required to implement an effective LDCT screening program (Q3). Questions about LDCT screening acceptability and feasibility were not explicitly included in the scope. However, as the evidence is based primarily on US programs and UK pilot studies, the relevance to the local setting requires careful consideration. The Queensland Lung Cancer Screening Study provides feasibility data about clinical aspects of LDCT screening but little about program design. The International Lung Screening Trial is still in the recruitment phase and findings are not yet available for inclusion in this Evidence Check. The Australian Population Based Screening Framework was developed to “inform decision-makers on the key issues to be considered when assessing potential screening programs in Australia”.(10) As the Framework is specific to population-based, rather than high-risk, screening programs, there is a lack of clarity about transferability of criteria. However, the Framework criteria do stipulate that a screening program must be acceptable to “important subgroups such as target participants who are from culturally and linguistically diverse backgrounds, Aboriginal and Torres Strait Islander people, people from disadvantaged groups and people with a disability”.(10) An extensive search of the literature highlighted that there is very little information about the acceptability of LDCT screening to these population groups in Australia. Yet they are part of the high-risk population.(10) There are also considerable gaps in the evidence about the cost-effectiveness of LDCT screening in different settings, including Australia. The evidence base in this area is rapidly evolving and is likely to include new data from the NELSON trial and incorporate data about the costs of targeted- and immuno-therapies as these treatments become more widely available in Australia.
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