Log in

Relevant bibliographies by topics / Metal diketonate / Journal articles

Journal articles on the topic 'Metal diketonate'

To see the other types of publications on this topic, follow the link: Metal diketonate.

Author: Grafiati

Published: 10 December 2022

Last updated: 29 January 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Metal diketonate.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Berry, A. D., R. T. Holm, M. Fatemi, and D. K. Gaskill. "OMCVD of thin films from metal diketonates and triphenylbismuth." Journal of Materials Research 5, no. 6 (June 1990): 1169–75. http://dx.doi.org/10.1557/jmr.1990.1169.

Full text

Abstract:

Films containing the metals copper, yttrium, calcium, strontium, barium, and bismuth were grown by organometallic chemical vapor deposition (OMCVD). Depositions were carried out at atmospheric pressure in an oxygen-rich environment using metal beta-diketonates and triphenylbismuth. The films were characterized by Auger electron spectroscopy, Nomarski and scanning electron microscopy, and x-ray diffraction. The results show that films containing yttrium consisted of Y2O3 with a small amount of carbidic carbon, those with copper and bismuth were mixtures of oxides with no detectable carbon, and those with calcium, strontium, and barium contained carbonates. Use of a partially fluorinated barium beta-diketonate gave films of BaF2 with small amounts of BaCO3.

APA, Harvard, Vancouver, ISO, and other styles

2

Cavell, KJ. "Metal Chelate Systems as Catalysts for Olefin and Carbon Monoxide Conversion Reactions." Australian Journal of Chemistry 47, no. 5 (1994): 769. http://dx.doi.org/10.1071/ch9940769.

Full text

Abstract:

The application of non-phosphine-based chelating ligands in homogeneous catalyst systems is a surprisingly recent and relatively unexplored area of research. Chelating ligands can concurrently stabilize intermediates, control catalyst activity and direct the product distribution far more effectively than monodentate ligands. In this review our studies with catalyst systems containing chelate ligands primarily of the β-diketonate type [dithio-β-diketonate (sacsac); monothio-β-diketonate (sacac); and imino β-diketonate (nacac) ligands] is discussed. Examples of the catalyst systems show enzyme-like superactivity. Studies modelling these catalyst systems have provided valuable information relating the effects of ligand modifications to reaction pathways and to activities. Our most recent investigations of simple chelating ligands based on picolinic acid are also discussed. Studies modelling CO/ethene insertion/elimination with extremely labile alkylplatinum picolinate complexes led to the development of new single-component nickel oligomerization catalysts.

APA, Harvard, Vancouver, ISO, and other styles

3

Blasi, Delia, Pierluigi Mercandelli, and Lucia Carlucci. "Supramolecular Frameworks and a Luminescent Coordination Polymer from New β-Diketone/Tetrazole Ligands." Inorganics 10, no. 4 (April 18, 2022): 55. http://dx.doi.org/10.3390/inorganics10040055.

Full text

Abstract:

Mixed multidentate linkers with donor groups of different types can be fruitfully exploited in the self-assembly of coordination polymers (CPs) and Metal-Organic Frameworks (MOFs). In this work we develop new ligands containing a β-diketone chelating functionality, to better control the stereochemistry at the metal center, and tetrazolyl multidentate bridging groups, a combination not yet explored for networking with metal ions. The new ligands, 1,3-bis(4-(1H-tetrazol-5-yl)phenyl)-1,3-propanedione (H3L1) and 1-phenyl-3-(4-(1H-tetrazol-5-yl)phenyl)-1,3-propanedione (H2L2), are synthesized from the corresponding nitrile precursors by [2+3] dipolar cycloaddition of azide under metal-free catalytic conditions. Crystal structure analysis evidences the involvement of tetrazolyl fragments in multiple hydrogen bonding giving 2D and 1D supramolecular frameworks. Reactivity of the new ligands with different metal salts indicates good coordinating ability, and we report the preparation and structural characterization of the tris–chelate complex [Fe(HL1)3]3− (1) and the homometallic 2D CP [ZnL2(DMSO)] (2). In compound 1 only the diketonate donor is used, whereas the partially deprotonated tetrazolyl groups are involved in hydrogen bonding, giving rise to a 2D supramolecular framework of (6,3)IIa topological type. In compound 2 the ligand is completely deprotonated and uses both the diketonate donor (chelating) and the tetrazolate fragment (bridging) to coordinate the Zn(II) ions. The resulting neutral 2D network of sql topology shows luminescence in the solid state, which is red shifted with respect to the free ligand. Interestingly, it can be easily exfoliated in water to give a luminescent colloidal solution.

APA, Harvard, Vancouver, ISO, and other styles

4

Krajewski, Sebastian M., Aaron S. Crossman, Eser S. Akturk, Tim Suhrbier, Steven J. Scappaticci, Maxwell W. Staab, and Michael P. Marshak. "Sterically encumbered β-diketonates and base metal catalysis." Dalton Transactions 48, no. 28 (2019): 10714–22. http://dx.doi.org/10.1039/c9dt02293g.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Walczak, Anna, Gracjan Kurpik, and Artur R. Stefankiewicz. "Intrinsic Effect of Pyridine-N-Position on Structural Properties of Cu-Based Low-Dimensional Coordination Frameworks." International Journal of Molecular Sciences 21, no. 17 (August 26, 2020): 6171. http://dx.doi.org/10.3390/ijms21176171.

Full text

Abstract:

Metal-organic assemblies have received significant attention for catalytic and other applications, including gas and energy storage, due to their porosity and thermal/chemical stability. Here, we report the synthesis and physicochemical characterization of three metallosupramolecular assemblies consisting of isomeric ambidentate pyridyl-β-diketonate ligands L1–L3 and Cu(II) metal ions. It has been demonstrated that the topology and dimensionality of generated supramolecular aggregates depend on the location of the pyridine nitrogen donor atom in L1–L3. This is seen in characterization of two distinct 2D polymeric assemblies, i.e., [Cu(L1)2]n and [Cu(L2)2]n, in which both β-diketonate and pyridine groups are coordinated to the Cu(II) center, as well as in characterization of the mononuclear 1D complex Cu(L3)2, in which the central atom is bound only by two β-diketonate units.

APA, Harvard, Vancouver, ISO, and other styles

6

Wang, Hongmei, Zulei Zhang, Hailong Wang, Liping Guo, and Lei Li. "Metal β-diketonate complexes as highly efficient catalysts for chemical fixation of CO2 into cyclic carbonates under mild conditions." Dalton Transactions 48, no. 42 (2019): 15970–76. http://dx.doi.org/10.1039/c9dt03584b.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Ivakha, Nadiia, Oleksandra Berezhnytska, Oleksandr Rohovtsov, Olena Trunova, and Serhii Smola. "INVESTIGATION OF NEW POLYMER COMPLEXES BASED ON Yb(III) β-DIKETONATES." Ukrainian Chemistry Journal 88, no. 5 (June 24, 2022): 3–14. http://dx.doi.org/10.33609/2708-129x.88.05.2022.3-14.

Full text

Abstract:

The metal polymers based on mono- and heteroligand β-diketonate complexes of Yb(III) with 2,7-dimethyl-octen-1-dione-3,5, 2,6-dimethyl-heptene-1-dione-3, 5 and with phenanthroline was synthesized. It has been defined that the coordination environment of the central ion remains unchanged during radical polymerization. The shape and position of the bands in the electronic absorption spectra are similar to the corresponding monomeric β-diketonate metal complexes, and slight shifts indicate deformation of the elementary unit of the metal polymer during the formation of the polymer chain. It is shown that the polymerization process lead to an increasing in the thermal stability of polymer complexes in comparison with monomeric analogues. An increase in the emission of metal polymers in comparison with monomeric complexes was established by the method of luminescent spectroscopy, which is due to energy, steric, and structural-mechanical factors.

APA, Harvard, Vancouver, ISO, and other styles

8

Marciniak, Bronislaw, and Gonzalo E. Buono-Core. "Photochemical properties of 1,3-diketonate transition metal chelates." Journal of Photochemistry and Photobiology A: Chemistry 52, no. 1 (May 1990): 1–25. http://dx.doi.org/10.1016/1010-6030(90)87085-p.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Kostyuk, N. N., T. A. Dik, and D. S. Umreiko. "Spectral properties and structure ofβ-diketonate metal complexes." Journal of Applied Spectroscopy 58, no. 1-2 (January 1993): 135–39. http://dx.doi.org/10.1007/bf00659174.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Shen, Xiang, and Bing Yan. "A novel fluorescence probe for sensing organic amine vapors from a Eu3+β-diketonate functionalized bio-MOF-1 hybrid system." Journal of Materials Chemistry C 3, no. 27 (2015): 7038–44. http://dx.doi.org/10.1039/c5tc01287b.

Full text

Abstract:

A classic anionic metal–organic framework (bio-MOF-1) for Eu³⁺-β-diketonate complex encapsulation has the utility of a sensory material for sensing volatile organic molecules, especially volatile amines.

APA, Harvard, Vancouver, ISO, and other styles

11

Beale, Christopher, Stefanie Hamacher, Alexey Yakushenko, Oumaima Bensaid, Sabine Willbold, Guillermo Beltramo, Sören Möller, et al. "Correction: Tantalum(v) 1,3-propanediolate β-diketonate solution as a precursor to sol–gel derived, metal oxide thin films." RSC Advances 10, no. 53 (2020): 32102. http://dx.doi.org/10.1039/d0ra90092c.

Full text

Abstract:

Correction for ‘Tantalum(v) 1,3-propanediolate β-diketonate solution as a precursor to sol–gel derived, metal oxide thin films’ by Christopher Beale et al., RSC Adv., 2020, 10, 13737–13748, DOI: 10.1039/D0RA02558E.

APA, Harvard, Vancouver, ISO, and other styles

12

Beale, Christopher, Stefanie Hamacher, Alexey Yakushenko, Oumaima Bensaid, Sabine Willbold, Guillermo Beltramo, Sören Möller, et al. "Tantalum(v) 1,3-propanediolate β-diketonate solution as a precursor to sol–gel derived, metal oxide thin films." RSC Advances 10, no. 23 (2020): 13737–48. http://dx.doi.org/10.1039/d0ra02558e.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Lieberman, Craig M., Alexander S. Filatov, Zheng Wei, Andrey Yu Rogachev, Artem M. Abakumov, and Evgeny V. Dikarev. "Mixed-valent, heteroleptic homometallic diketonates as templates for the design of volatile heterometallic precursors." Chemical Science 6, no. 5 (2015): 2835–42. http://dx.doi.org/10.1039/c4sc04002c.

Full text

Abstract:

A unique series of mixed-valent transition metal complexes (M^III= Fe; M^II= Fe, Mn, Ni) have been designed using a combination of diketonate ligands with electron-withdrawing (blue) and electron-donating (pink) substituents.

APA, Harvard, Vancouver, ISO, and other styles

14

Das, M., and D. T. Haworth. "Monothio-β-Diketonate Transition Metal Complexes Having A Trifluoromethyl Substituent." Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry 17, no. 3 (March 1987): 319–31. http://dx.doi.org/10.1080/00945718708059437.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Schendel, John, and E. L. Wehry. "Laser photofragmentation fluorescence spectrometry of volatile .beta.-diketonate metal chelates." Analytical Chemistry 60, no. 17 (September 1988): 1759–62. http://dx.doi.org/10.1021/ac00168a023.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Toscano, Paul J., Claudia Dettelbacher, John Waechter, Neville P. Pavri, Daniel H. Hunt, Eric T. Eisenbraun, Bo Zheng, and Alain E. Kaloyeros. "SYNTHESIS AND CHARACTERIZATION OF POLYFLUORINATED β-DIKETONATE TRANSITION METAL COMPLEXES1,2." Journal of Coordination Chemistry 38, no. 4 (June 1996): 319–35. http://dx.doi.org/10.1080/00958979608024526.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Harvey, Scott D., and Thomas J. Wenzel. "Selective gas-phase capture of explosives on metal β-diketonate polymers." Journal of Chromatography A 1192, no. 2 (May 2008): 212–17. http://dx.doi.org/10.1016/j.chroma.2008.03.078.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

KUMAR, MUKESH, and T. R. SHARMA. "Synthesis, Characterization and Properties of Metal Complexes of Beta-diketonate Complexes." Oriental Journal Of Chemistry 28, no. 4 (December 22, 2012): 1827–31. http://dx.doi.org/10.13005/ojc/280437.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

AL-ANBER, MOHAMMED A., and HANNEN DAOUD. "Synthesis and Characterization of Metal-beta-diketonate Coordination Complexes and Polymers." Oriental Journal Of Chemistry 29, no. 03 (September 30, 2013): 905–9. http://dx.doi.org/10.13005/ojc/290307.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Babain, V. A., V. A. Kamachev, R. N. Kiseleva, A. A. Murzin, I. V. Smirnov, A. Yu Shadrin, S. I. Yakimovich, and I. V. Zerova. "Effect of the Nature of Fluid and Structure of -Diketone on Supercritical Extraction of Metal β-Diketonate Complexes." Radiochemistry 45, no. 6 (November 2003): 602–4. http://dx.doi.org/10.1023/b:rach.0000015759.79741.b7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Barreca, Davide, Ettore Fois, Alberto Gasparotto, Chiara Maccato, Mario Oriani, and Gloria Tabacchi. "The Early Steps of Molecule-to-Material Conversion in Chemical Vapor Deposition (CVD): A Case Study." Molecules 26, no. 7 (April 1, 2021): 1988. http://dx.doi.org/10.3390/molecules26071988.

Full text

Abstract:

Transition metal complexes with β-diketonate and diamine ligands are valuable precursors for chemical vapor deposition (CVD) of metal oxide nanomaterials, but the metal-ligand bond dissociation mechanism on the growth surface is not yet clarified in detail. We address this question by density functional theory (DFT) and ab initio molecular dynamics (AIMD) in combination with the Blue Moon (BM) statistical sampling approach. AIMD simulations of the Zn β-diketonate-diamine complex Zn(hfa)2TMEDA (hfa = 1,1,1,5,5,5-hexafluoro-2,4-pentanedionate; TMEDA = N,N,N′,N′-tetramethylethylenediamine), an amenable precursor for the CVD of ZnO nanosystems, show that rolling diffusion of this precursor at 500 K on a hydroxylated silica slab leads to an octahedral-to-square pyramidal rearrangement of its molecular geometry. The free energy profile of the octahedral-to-square pyramidal conversion indicates that the process barrier (5.8 kcal/mol) is of the order of magnitude of the thermal energy at the operating temperature. The formation of hydrogen bonds with surface hydroxyl groups plays a key role in aiding the dissociation of a Zn-O bond. In the square-pyramidal complex, the Zn center has a free coordination position, which might promote the interaction with incoming reagents on the deposition surface. These results provide a valuable atomistic insight on the molecule-to-material conversion process which, in perspective, might help to tailor by design the first nucleation stages of the target ZnO-based nanostructures.

APA, Harvard, Vancouver, ISO, and other styles

22

Lee, Yeng Ying, D. Barney Walker, J. Justin Gooding, and Barbara A. Messerle. "Ruthenium(ii) complexes containing functionalised β-diketonate ligands: developing a ferrocene mimic for biosensing applications." Dalton Trans. 43, no. 33 (2014): 12734–42. http://dx.doi.org/10.1039/c4dt01459f.

Full text

Abstract:

A novel ruthenium(ii) complex with electrochemical behaviour very similar to that of ferrocene was identified by variation of both the number and electronic demand of the substituted β-diketonato ligands bound to the metal centre.

APA, Harvard, Vancouver, ISO, and other styles

23

Belot, John A., Richard J. McNeely, Anchuan Wang, Charles J. Reedy, Tobin J. Marks, Glenn P. A. Yap, and Arnold L. Rheingold. "Expedient route to volatile zirconium metal-organic chemical vapor deposition precursors using amide synthons and implementation in yttria-stabilized zirconia film growth." Journal of Materials Research 14, no. 1 (January 1999): 12–15. http://dx.doi.org/10.1557/jmr.1999.0004.

Full text

Abstract:

This communication reports rapid, efficient syntheses of the zirconium-organic metal-organic chemical vapor deposition (MOCVD) precursors Zr(acac)4 and Zr(dpm)4 (acac = acetylacetonate; dpm = dipivaloylmethanate) as well as a new, highly volatile, air- and moisture-stable Zr precursor based on a tetradentate Schiff-base ligand, Zr(tfacen)2 (tfacen = bis-trifluoroacetylacetone-ethylenediiminate). The improved one-step synthetic routes employ tetrakis(dimethylamido)zirconium as a common intermediate and represent a major advance over previous methods employing ZrCl4 or diketonate metathesis. Furthermore, Zr(tfacen)2 is shown to be an effective metal-organic precursor for the MOCVD-mediated growth of (100) oriented yttria-stabilized zirconia thin films.

APA, Harvard, Vancouver, ISO, and other styles

24

Lavallee, Richard J., Bentley J. Palmer, Roland Billing, Horst Hennig, Guillermo Ferraudi, and Charles Kutal. "Efficient Substitutional Photochemistry of a Third-Row Transition Metal β-Diketonate Complex." Inorganic Chemistry 36, no. 24 (November 1997): 5552–58. http://dx.doi.org/10.1021/ic9705150.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Morris, J. B., and M. V. Johnston. "Multiphoton ionization and fragmentation of transition-metal and lanthanide .beta.-diketonate complexes." Journal of Physical Chemistry 89, no. 25 (December 1985): 5399–401. http://dx.doi.org/10.1021/j100271a017.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Qin, Xiangdong, and Francisco Zaera. "Chemistry of Ruthenium Diketonate Atomic Layer Deposition (ALD) Precursors on Metal Surfaces." Journal of Physical Chemistry C 122, no. 25 (January 29, 2018): 13481–91. http://dx.doi.org/10.1021/acs.jpcc.7b11960.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Burrows, Andrew D., Kevin Cassar, Mary F. Mahon, Sean P. Rigby, and John E. Warren. "Synthesis and characterisation of metal–organic frameworks containing bis(β-diketonate) linkers." CrystEngComm 10, no. 10 (2008): 1474. http://dx.doi.org/10.1039/b808350a.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Islam, Ashraful, Surya Prakash Singh, and Liyuan Han. "Synthesis and Application of New Ruthenium Complexes Containingβ-Diketonato Ligands as Sensitizers for Nanocrystalline TiO2Solar Cells." International Journal of Photoenergy 2011 (2011): 1–8. http://dx.doi.org/10.1155/2011/204639.

Full text

Abstract:

Five heteroleptic ruthenium complexes having differentβ-diketonato ligands, [Ru(tctpy)(dppd)(NCS)] (1), [Ru(tctpy)(pd)(NCS)] (2), [Ru(tctpy)(tdd)(NCS)] (3), [Ru(tctpy)(mepd)(NCS)] (4), and [Ru(tctpy)(tmhd)(NCS)] (5), where tctpy = 4,4′,4′′-tricarboxy-2,2′:6′,2′′-terpyridine, pd = pentane-2,4-dione, mepd = 3-methylpentane-2,4-dione, tmhd = 2,2,6,6-tetramethylheptane-3,5-dione, tdd = tridecane-6,8-dione, and dppd = 1,3-diphenylpropane-1,3-dione, were synthesized and characterized. These heteroleptic complexes exhibit a broad metal-to-ligand charge transfer absorption band over the whole visible range extending up to 950 nm. The low-energy absorption bands and theE (Ru3+/2+) oxidation potentials in these complexes could be tuned to about 15 nm and 110 mV, respectively, by choosing appropriateβ-diketonate ligands. Molecular orbital calculation of complex1shows that the HOMO is localized on the NCS ligand and the LUMO is localized on the tctpy ligand, which is anchored to the TiO2nanoparticles. Theβ-diketonato-ruthenium(II)-polypyridyl sensitizers, when anchored to nanocrystalline TiO2films for light to electrical energy conversion in regenerative photoelectrochemical cells, achieve efficient sensitization to TiO2electrodes with increasing activity in the order5<4<3≈2<1. Under standard AM 1.5 sunlight, the complex1yielded a short-circuit photocurrent density of 16.7 mA/cm2, an open-circuit voltage of 0.58 V, and a fill factor of 0.64, corresponding to an overall conversion efficiency of 6.2%. A systematic tuning of HOMO energy level shows that an efficient sensitizer should possess a ground-state redox potential value of >+.53 V versus SCE.

APA, Harvard, Vancouver, ISO, and other styles

29

Toledo, Dominique, Yanko Moreno, Octavio Peña, Ricardo Baggio, and Andrés Vega. "New terpyridine-(β-diketonate)-copper(II) complex. Structure and magnetism." Acta Crystallographica Section A Foundations and Advances 70, a1 (August 5, 2014): C1262. http://dx.doi.org/10.1107/s2053273314087373.

Full text

Abstract:

Over the last decade the design and synthesis of metal-organic compounds with fascinating structural properties and potential applications as functional materials has been a major challenge in various fields of research.1Strategies for preparing these compounds are based on the careful selection of the constituent building blocks. 4'-(substituted)-4,2':6',4''-terpyridine ligands are considered versatile building blocks for the assembly of coordination polymers and networks with useful solid-state properties, such as magnetism, luminescence, redox activity, etc.2The divergent arrangements of N-donor atoms and the attachment of aryl substituents into the 4'-position of 4,2':6',4''-terpyridine allow to bridge two or more metal centers, giving rise to molecular assemblies of 1, 2 or 3 dimensions.3Our line of interest is the obtainment of compounds with emergent magnetic properties. Herein we present a copper complex surveying the new 4'-(quinolin-4-yl)-4,2':6',4''-terpyridine ligand (L), and formulated as [Cu(C5H1F6O2)2(C25H16N4·CHCl3)]n which was produced from the reaction of two equivalents of L with Cu(hfac)2, (hfac=hexafluoroacetylacetonate). The copper ion in trans-{CuN2(hfac)2} has an octahedral environment. The nitrogen atoms of the terminal pyridine rings coordinate to the paramagnetic centres, while the central ring remains uncoordinated. The linkage of the resulting polyhedra gives raise to an undulating 1D polymeric structure. Within these chains there are two main non-covalent interactions: π-stacking between the quinoline substituents and the pyridine rings and CH···F interactions due to CF3group of the hfac ligand. There are also weak CH···N, CH···π and π-π intermolecular interactions linking the L and CHCl3groups, which give stability to the crystal structure. Finally, we performed magnetic measurements, in order to determine the magnetic behaviour of our system. Acknowledgments: FONDECYT 1130433 project, CIPA of University of Concepción, LIA-MIF 836

APA, Harvard, Vancouver, ISO, and other styles

30

Rousseau, Francois, Ajay Jain, Toivo T. Kodas, Mark Hampden-Smith, J. Doug Farr, and Ross Muenchausen. "Low-temperature dry etching of metal oxides and ZnS via formation of volatile metal β-diketonate complexes." J. Mater. Chem. 2, no. 8 (1992): 893–94. http://dx.doi.org/10.1039/jm9920200893.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Tai, Xi Shi. "Synthesis and Fluorescence Properties of New Europium (III) and Terbium (III) Complexes with N-(3-methoxyl–phenyl)ketoacetamide." Advanced Materials Research 322 (August 2011): 68–71. http://dx.doi.org/10.4028/www.scientific.net/amr.322.68.

Full text

Abstract:

Aβ-diketonate-type ligand, N-(3-methoxyl–phenyl)ketoacetamide (L), and its complexes with europium (III) and terbium (III) were synthesized. The ligand and complexes were characterized by elemental analysis, IR spectra,1HNMR spectra, mass spectra and luminescent spectra. The complexes were characterized by elemental analysis, IR spectra. The stoichiometry of metal-to-ligand in the complexes also was confirmed by the fluorescence behavior of the ligand and complexes in CH3CH2OH solution. In addition, the fluorescence properties of complexes in DMF, CH3OH, CH3CH2OH, acetone and CHCl3were investigated. The characteristic fluorescence of terbium (III) was assigned.

APA, Harvard, Vancouver, ISO, and other styles

32

Jain, A., K. M. Chi, M. J. Hampden-Smith, T. T. Kodas, J. D. Farr, and M. F. Paffett. "Chemical vapor deposition of copper via disproportionation of hexafluoroacetylacetonato(1,5 -cyclooctadiene)copper(I), (hfac)Cu(1,5-COD)." Journal of Materials Research 7, no. 2 (February 1992): 261–64. http://dx.doi.org/10.1557/jmr.1992.0261.

Full text

Abstract:

Hot- and cold-wall chemical vapor deposition (CVD) using the volatile copper(I) compound (hfac)Cu(1,5-COD), where hfac = 1,1,1,5,5,5,-hexafluoroacetylacetonate and 1,5-COD = 1,5-cyclooctadiene, as a precursor was carried out in hot-wall and warm-wall, lamp-heated reactors using SiO2 substrates that had been patterned with Pt or W, over a temperature range 120 °C-250 °C. Deposition was observed onto Pt, W, and SiO2 over this temperature range at rates of up to 3750 Å/min to give copper films that contained no detectable impurities by Auger electron spectroscopy and gave resistivities of 1.9-5.7 μ ohm cm. The volatile by-products formed during deposition were 1,5-COD and Cu(hfac)2 and a mass balance was consistent with the quantitative disproportionation reaction: 2(hfac)Cu(1,5-COD) → Cu + Cu(hfac)2 + 2(1,5-COD). The measured activation energy for this CVD reaction was 26(2) kcal/mol. The absence of selectivity for metal surfaces in the presence of SiO2 is in contrast to CVD results for the related compounds (β-diketonate)Cu(PMe3) where β-diketonate = hfac, 1,1,1-trifluoroacetylacetonate (tfac), and acetylacetonate (acac).

APA, Harvard, Vancouver, ISO, and other styles

33

Poelsma, Sybout N., Alastair H. Servante, Francesco P. Fanizzi, and Peter M. Maitlis. "Discotic metallomesogens: Synthesis and properties of square planar metal bis(β-diketonate) complexes." Liquid Crystals 16, no. 4 (April 1994): 675–85. http://dx.doi.org/10.1080/02678299408036539.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Fan, Pei-Chen, and Chung K. Lai. "Discotic Metallomesogens: Effects of Sidechains Density in Transition Metal Bis(β-Diketonate) Complexes." Journal of the Chinese Chemical Society 43, no. 4 (August 1996): 337–43. http://dx.doi.org/10.1002/jccs.199600049.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Kitaigorodskii, A. N., and A. N. Belyaev. "Solvation of Coordinatively Saturated Metal Complexes of Nitrogen Ligands." Zeitschrift für Naturforschung A 40, no. 12 (December 1, 1985): 1271–77. http://dx.doi.org/10.1515/zna-1985-1214.

Full text

Abstract:

1H NMR shifts were measured for ten organic compounds L in solutions containing paramagnetic bis[hydrotris(l-pyrazolyl)borato]cobalt(II), Co(HBpz3)2. The observed paramagnetic shifts were accounted for by pseudo-contact interactions in the outer-sphere adducts of Co(HBpz3)2 · L. From the concentration dependence of the induced shifts, the thermodynamic parameters of the outer-sphere complexation were determined. It is shown that a simple electrostatic model of Co(HBpz3)2 solvation is not consistent with the experimental results. Comparison of the data for pyrazolylborate and β-diketonate transition metal complexes showed that the specificity of the outer-sphere solvation depends to a large extent on the nature of the first coordination sphere ligands. Co(HBpz3)2 induces anomalous shifts of the signals of NMR standards. It is necessary to assume a specific interaction between the standards and Co(HBpz3)2.

APA, Harvard, Vancouver, ISO, and other styles

36

Xia, Changfeng, Timothy L. Ward, Paolina Atanasova, and Robert W. Schwartz. "Metal-organic chemical vapor deposition of Sr–Co–Fe–O films on porous substrates." Journal of Materials Research 13, no. 1 (January 1998): 173–79. http://dx.doi.org/10.1557/jmr.1998.0023.

Full text

Abstract:

Aerosol-assisted chemical vapor deposition using the β-diketonate precursors Sr(tmhd)2 · 2H2O, Fe(tmhd) 3, and Co(tmhd) 3 was investigated for depositing thin films of the mixed-conducting ceramic SrCoyFe1−yO3−δ onto porous α–Al2O3 substrates. Single-phase SrCoyFe1−yO3−δ perovskite films were obtained at a deposition temperature of 550 °C and pressure of 15 mm Hg, whereas deposition at atmospheric pressure produced mixed-phase films. The Co/Fe elemental ratios in the films reflected those in the precursor solution, but the films were depleted in Sr. Reduced-pressure deposition provided a more uniform film morphology than atmospheric pressure, and led to a supported film which was leak-tight to N2 flow.

APA, Harvard, Vancouver, ISO, and other styles

37

Jia, Yufeng, Hongfeng Li, Peng Chen, Ting Gao, Wenbin Sun, and Pengfei Yan. "Magnetic and Optical Properties of Novel Lanthanide(III) Complexes Based on Schiff Base and β-Diketonate Ligands." Australian Journal of Chemistry 71, no. 7 (2018): 527. http://dx.doi.org/10.1071/ch18136.

Full text

Abstract:

A series of lanthanide-based self-assembling complexes constructed from Schiff base and β-diketonate ligands have been synthesised by the same method. They are one dimensional complexes ({[Ln(H2L)(tta)2(OAc)]·0.5H2O}n (Ln = Eu (1), Gd (2), Dy (3), Yb (4)); H2L = N,N′-bis(salicylidene)butane-1,4-diamine, tta = 2-thenoyltrifluoroacetone). Complexes 1 and 4 exhibit characteristic metal-centred emission in the solid state. The lifetimes and quantum yields of luminescence were also determined. Magnetic analysis reveals that complex 3 exhibits field-induced single-molecule magnet (SMM) behaviour with an energy barrier of 24.07 K.

APA, Harvard, Vancouver, ISO, and other styles

38

WEBER, A., and H. SUHR. "THIN LANTHANUM OXIDE AND RARE-EARTH OXIDE FILMS BY PECVD OF β-DIKETONATE CHELATE COMPLEXES." Modern Physics Letters B 03, no. 13 (September 10, 1989): 1001–8. http://dx.doi.org/10.1142/s0217984989001552.

Full text

Abstract:

A method for the deposition of lanthanum oxide and rare-earth (Re) oxide films using the tris[2,2,6,6-tetramethyl-3,5-heptanedionato] chelate complexes is reported. The films were characterized by metal analysis, carbon analysis, FTIR spectra, XPS and SEM micrographs. The film composition strongly depends on experimental parameters. Films deposited in an oxygen plasma at a substrate temperature of 400°C and a power density of 1.5 W/cm 2 are amorphous, transparent and show carbon contents of < 2%. If argon or hydrogen is used as carrier gas, films contain ≈ 5% carbon. With substrate temperatures < 400° C or power densities < 1.5 W/cm 2, films containing trivalent Re metal ions and considerable contamination by polymeric material are formed.

APA, Harvard, Vancouver, ISO, and other styles

39

Zhang, Lei, Hongfeng Li, Peng Chen, Wenbin Sun, and Pengfei Yan. "Quadruple-stranded Eu-helicate assembled from bis-β-diketonate: Its stability towards metal ions." Chemical Research in Chinese Universities 32, no. 4 (June 14, 2016): 534–38. http://dx.doi.org/10.1007/s40242-016-6009-6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Miller, Jack M., David Wails, J. Stephen Hartman, and Jennifer L. Belelie. "Friedel–Crafts catalysis using sol–gel derived supported reagents Metal diketonate modified mesoporous aluminosilicates." Journal of the Chemical Society, Faraday Transactions 94, no. 6 (1998): 789–95. http://dx.doi.org/10.1039/a707137j.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Condorelli, Guglielmo G., Alessandro Motta, Cedric Bedoya, Alessandro Di Mauro, Giovanna Pellegrino, and Emanuele Smecca. "Engineered Si(100) surfaces for the gas-phase anchoring of metal β-diketonate complexes." Inorganica Chimica Acta 360, no. 1 (January 2007): 170–78. http://dx.doi.org/10.1016/j.ica.2006.07.079.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Gostynski, Roxanne, Marrigje Marianne Conradie, Ren Yuan Liu, and Jeanet Conradie. "Electronic Influence of Different β-Diketonato Ligands on the Electrochemical Behaviour of Tris(β-Diketonato)M(III) Complexes, M = Cr, Mn and Fe." Journal of Nano Research 44 (November 2016): 252–64. http://dx.doi.org/10.4028/www.scientific.net/jnanor.44.252.

Full text

Abstract:

The reduction of the MIII/MII metal couple of complexes Cr (β-diketonato)3, Fe (β-diketonato)3 and Mn (β-diketonato)3 is reviewed and compared. The ease of reduction of the MIII/MII couple of M(β-diketonato)3 complexes increases according to the metal sequence Cr (β-diketonato)3 < Fe (β-diketonato)3 < Mn (β-diketonato)3 (with the most positive reduction potential). Good linear relationships obtained between the reduction potential and different electronic parameters related to the β-diketonato ligand on these MIII(β-diketonato)3 complexes, show that the ease of reduction of the MIII/MII couple increases with decreasing acidic strength (pKa) of the respective β-diketone ligands. It also increases with increasing total group electronegativity of the R and R' groups on the respective β-diketonato ligand (RCOCHCOR')− of the M(β-diketonato)3 complexes, (χR + χR'), as well as with an increase in the total Hammett sigma meta constants (σR + σR'), and also with increasing value of the Lever ligand electronic parameter (EL) of ligand (RCOCHCOR')−.

APA, Harvard, Vancouver, ISO, and other styles

43

Norkov, Sergey V., Anton V. Cherkasov, Andrey S. Shavyrin, Maxim V. Arsenyev, Viacheslav A. Kuropatov, and Vladimir K. Cherkasov. "Annulation of a 1,3-dithiole ring to a sterically hindered o-quinone core. Novel ditopic redox-active ligands." Beilstein Journal of Organic Chemistry 17 (January 27, 2021): 273–82. http://dx.doi.org/10.3762/bjoc.17.26.

Full text

Abstract:

The fused 1,3-dithiole spacer seems to be very suitable for the functionalization of sterically hindered o-quinones with additional groups capable of coordination of metal ions and/or possessing a redox activity. An effective method for the synthesis of sterically hindered o-quinones containing 1,3-diketonate, dinitrile and p-quinone-methide functional groups at the periphery of the ligand has been developed. The novel compounds have rigid and conjugated structures and exhibit properties typical of o-quinones. A study of their monoreduced semiquinone derivatives reveal that the spin density is delocalized across the whole molecule, including peripheral fragments. The first stable o-quinone derivative bearing an annulated thiete heterocycle has been isolated and characterized.

APA, Harvard, Vancouver, ISO, and other styles

44

Al-Anber, Mohammed A., Mahdi Lataifeh, and Haneen Daoud. "The Magnetic Properties of d8 -d10 β-Diketonate Supramolecular Metal Complexes and Their Macromolecular Polymers." Journal of Macromolecular Science, Part B 52, no. 2 (July 2, 2012): 344–54. http://dx.doi.org/10.1080/00222348.2012.701554.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Burrows, Andrew D., Christopher G. Frost, Mary F. Mahon, Paul R. Raithby, Catherine L. Renouf, Christopher Richardson, and Anna J. Stevenson. "Dipyridyl β-diketonate complexes: versatile polydentate metalloligands for metal–organic frameworks and hydrogen-bonded networks." Chemical Communications 46, no. 28 (2010): 5067. http://dx.doi.org/10.1039/c0cc00646g.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Bocknack, Brian M., Long-Cheng Wang, Freddie W. Hughes, and Michael J. Krische. "Chiral β-diketonate ligands of ‘pseudo planar chiral’ topology: enantioselective synthesis and transition metal complexation." Tetrahedron 61, no. 26 (June 2005): 6266–75. http://dx.doi.org/10.1016/j.tet.2005.03.118.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Pettinari, Claudio, Fabio Marchetti, Augusto Cingolani, Andrei Drozdov, Sergei Troyanov, Ivan Timokhin, and Vyacheslav Vertlib. "Lanthanide metal complexes containing the first structurally characterized β-diketonate acid stabilized by hydrogen bonding." Inorganic Chemistry Communications 6, no. 1 (January 2003): 48–51. http://dx.doi.org/10.1016/s1387-7003(02)00678-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Ow, Franklin P., Mary T. Berry, P. Stanley May, and Jeffrey I. Zink. "Wavelength and Metal Dependence in the Photofragmentation of a Gas-Phase Lanthanide β-Diketonate Complex." Journal of Physical Chemistry A 111, no. 20 (May 2007): 4144–49. http://dx.doi.org/10.1021/jp068838h.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Hori, Akiko, Ayaka Shinohe, Shohei Takatani, and Takeshi K. Miyamoto. "Synthesis and Crystal Structures of Fluorinated β-Diketonate Metal (Al3+, Co2+, Ni2+, and Cu2+) Complexes." Bulletin of the Chemical Society of Japan 82, no. 1 (January 15, 2009): 96–98. http://dx.doi.org/10.1246/bcsj.82.96.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

KUZMINA, N. P., L. I. MARTYNENKO, Z. A. TU, A. R. KAUL, G. V. GIRICHEV, N. I. GIRICHEVA, A. N. RYKOV, and Y. M. KORENEV. "Rare earth β-diketonate and carboxylate metal complexes as precursors for MOCVD of oxide films." Le Journal de Physique IV 03, no. C3 (August 1993): C3–385—C3–390. http://dx.doi.org/10.1051/jp4:1993353.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!