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Journal articles on the topic 'Novel Transition Metal Complexes'

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Author: Grafiati

Published: 18 May 2024

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1

Galal, Shadia A., Amira S. Abd El-All, Khaled H. Hegab, Asmaa A. Magd-El-Din, Nabil S. Youssef, and Hoda I. El-Diwani. "Novel antiviral benzofuran-transition metal complexes." European Journal of Medicinal Chemistry 45, no. 7 (July 2010): 3035–46. http://dx.doi.org/10.1016/j.ejmech.2010.03.034.

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2

Zayed, Ehab M., Gehad G. Mohamed, and Ahmed M. M. Hindy. "Transition metal complexes of novel Schiff base." Journal of Thermal Analysis and Calorimetry 120, no. 1 (September 4, 2014): 893–903. http://dx.doi.org/10.1007/s10973-014-4061-3.

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3

Beldon, Patrick J., Sebastian Henke, Bartomeu Monserrat, Satoshi Tominaka, Norbert Stock, and Anthony K. Cheetham. "Transition metal coordination complexes of chrysazin." CrystEngComm 18, no. 27 (2016): 5121–29. http://dx.doi.org/10.1039/c5ce00792e.

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Eleven novel coordination compounds, composed of chrysazin (1,8-dihydroxyanthraquinone) and different first-row transition metals (Fe, Co, Ni, Cu), were synthesised and the structures determined by single-crystal X-ray diffraction.

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4

Bligh, S. W. Annie, Nick Choi, Donovan St C. Green, Harry R. Hudson, Catherine M. McGrath, Mary McPartlin, and Max Pianka. "Transition metal complexes of dialkyl α-hydroxyiminophosphonates, a novel class of metal complexes." Polyhedron 12, no. 23 (December 1993): 2887–90. http://dx.doi.org/10.1016/s0277-5387(00)80073-x.

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5

Andrade, Marta A., and Luísa M. D. R. S. Martins. "Novel Chemotherapeutic Agents - The Contribution of Scorpionates." Current Medicinal Chemistry 26, no. 41 (January 8, 2020): 7452–75. http://dx.doi.org/10.2174/0929867325666180914104237.

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: The development of safe and effective chemotherapeutic agents is one of the uppermost priorities and challenges of medicinal chemistry and new transition metal complexes are being continuously designed and tested as anticancer agents. Scorpionate ligands have played a great role in coordination chemistry, since their discovery by Trofimenko in the late 1960s, with significant contributions in the fields of catalysis and bioinorganic chemistry. Scorpionate metal complexes have also shown interesting anticancer properties, and herein, the most recent (last decade) and relevant scorpionate complexes reported for application in medicinal chemistry as chemotherapeutic agents are reviewed. The current progress on the anticancer properties of transition metal complexes bearing homo- or hetero- scorpionate ligands, derived from bis- or tris-(pyrazol-1-yl)-borate or -methane moieties is highlighted.

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6

Anusuya, A. M., B. S. Krishna, S. B. Benaka Prasad, K. Yogesh Kumar, R. Raveesha, and M. K. Prashanth. "Novel Heterocyclic Transition Metal Complexes: Synthesis, Characterization, Antimicrobial and Anticancer Activity." Asian Journal of Chemistry 33, no. 10 (2021): 2519–24. http://dx.doi.org/10.14233/ajchem.2021.23519.

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A heterocyclic ligand, 5-(2-(4-chlorophenyl)-1H-benzo[d]imidazol-1-yl)quinolin-8-ol and its Co(II), Ni(II), Cu(II) and Zn(II) complexes were synthesized and characterized by elemental analysis and spectroscopic techniques. According to the spectral analysis, the ligand acts as a bidentate ligand and coordinating through the nitrogen and deprotonated oxygen atoms. For Cu(II) and Ni(II) complexes, spectral analysis reveals square planer geometry, whereas Co(II) and Zn(II) complexes have tetrahedral geometry. The antibacterial results show that Zn(II) complex is more effective than the other metal(II) complexes examined. The ligand and its metal complexes were tested for anticancer activity using the MTT assay with cisplatin as the reference drug against A549, MCF7, and HCT116 cancer cell lines. Results showed that the metal(II) complexes were shown to be more active than the ligand, especially Zn(II) complex being the most potent among this series.

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7

Office, Editorial. "The steric and electronic effects of metal-containing substituents on Fischer carbene metal clusters." Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie 28, no. 3 (September 6, 2009): 237–60. http://dx.doi.org/10.4102/satnt.v28i3.61.

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8

Baklouti, Lassaad. "Novel phthalonitrile derivatives as potential compounds for extraction and complexation of metal cations." JOURNAL OF ADVANCES IN CHEMISTRY 11, no. 10 (December 17, 2016): 3870–74. http://dx.doi.org/10.24297/jac.v11i10.2185.

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The synthesis and the binding properties of novel phthalonitrile derivatives 1-3 towards metal cations have been described in this paper. The complexation and extraction of some transition and heavy metal cations have been followed by UV-visible spectrophotometry absorption in methanol. The conductivity studies have been used in order to confirm complex’s stoichiometries. The treatment of UV spectra by digital program showed the formation of ML (with ML2 in some cases) (M=metal, L=ligand) species. Beyond the discussion of the stability profiles of complexes particular attention is paid to the selectivity towards Cu2+ in the 1st sequence of transition metal cations and towards Hg2+ in the sequence of heavy metal cations.

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9

Bhale, S. P., A. R. Yadav, S. U. Tekale, R. B. Nawale, R. P. Marathe, P. S. Kendrekar, and R. P. Pawar. "Synthesis, Characterization and Antimicrobial Screening of Novel Hydrazide Ligand & It’s Transition Metal Complexes." Asian Journal of Chemistry 31, no. 4 (February 27, 2019): 938–42. http://dx.doi.org/10.14233/ajchem.2019.21795.

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Different transition metal complexes were synthesized from novel 3-bromo-2-[1-(4-hydroxy-6-methyl-2-oxo-2H-pyran-3-yl)ethylidene]hydrazide ligand (H2L) and characterized by spectral techniques. The synthesized ligand was found to act mono as well as di deprotonated (OH, NH) manner and stoichiometry of the ligand to metal ions was confirmed to be 1:1 in case of complex using metal chloride salts, whereas 1:2 in case of metal(II) complexes using metal acetate(II) salt. Structures of metal complexes were confirmed by IR, 1H NMR, TGA, XRD, elemental analysis and UV technique which revealed that Mn(II), Co(II), Ni(II), Cu(II) complexes were octahedral geometry and those of Cu(II), Zn(II) showed square planner and tetrahedral geometry around metal ion respectively. Furthermore H2L and its metal complexes were screened for antimicrobial activity which showed that ligand enhanced its biological activity after coordination with metal ions. In particular, Cd(II) and Mn(II) complexes exhibited excellent antifungal activity.

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10

Kumar, Manoj, Anita Rani, Hardeep Singh Tuli, Rajshree Khare, and Vinit Parkash. "Synthesis and Spectral Investigations of Polymeric Hydrazone Schiff Base and its Transition Metal Complexes with Promising Antimicrobial, Anti-Angeogenic and DNA Photo-Cleavage Activities." Asian Journal of Chemistry 31, no. 10 (August 30, 2019): 2331–36. http://dx.doi.org/10.14233/ajchem.2019.22157.

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This report describes the synthesis and exploration of novel Schiff base ligand in the form of a polymer (heptamer) which was prepared by reaction between 3,4-diacetyl-2,5-hexanedione and hydrazine hydrate in ethanol. On further reaction of Schiff base with transition metals ions (Co and Cu) leads to formation of its transition metal complexes. The structural identification of Schiff base ligand and its transition metal complexes were characterized by classical structural techniques like FT-IR, NMR and mass spectra. The free ligand and its transition metal complexes have been screened for in vitro biological activities against various strains of bacteria and fungi. The prepared Schiff base and its metal complexes were also screened for antiangiogenic activity. The results have shown the remarkable antimicrobial and antiangiogenic activities of the Schiff base and its metal complexes.

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11

Gok, Yasar, and Hamide Ertepinar. "Synthesis and Characterization of Novel Polyamidoxime Transition Metal Complexes." Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry 22, no. 10 (December 1992): 1495–505. http://dx.doi.org/10.1080/15533179208020272.

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12

Watson, Paul G., Enno Lork, and Rüdiger Mews. "Novel reactions of thiazyl fluorides with transition metal complexes." Journal of Fluorine Chemistry 71, no. 2 (April 1995): 197–98. http://dx.doi.org/10.1016/0022-1139(94)06022-e.

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13

Carlsen, Ryan W., and Daniel H. Ess. "Allylic amination reactivity of Ni, Pd, and Pt heterobimetallic and monometallic complexes." Dalton Transactions 45, no. 24 (2016): 9835–40. http://dx.doi.org/10.1039/c6dt00256k.

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14

Zhao, Lili, Chaoqun Chai, Wolfgang Petz, and Gernot Frenking. "Carbones and Carbon Atom as Ligands in Transition Metal Complexes." Molecules 25, no. 21 (October 26, 2020): 4943. http://dx.doi.org/10.3390/molecules25214943.

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This review summarizes experimental and theoretical studies of transition metal complexes with two types of novel metal-carbon bonds. One type features complexes with carbones CL2 as ligands, where the carbon(0) atom has two electron lone pairs which engage in double (σ and π) donation to the metal atom [M]⇇CL2. The second part of this review reports complexes which have a neutral carbon atom C as ligand. Carbido complexes with naked carbon atoms may be considered as endpoint of the series [M]-CR3 → [M]-CR2 → [M]-CR → [M]-C. This review includes some work on uranium and cerium complexes, but it does not present a complete coverage of actinide and lanthanide complexes with carbone or carbide ligands.

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15

Joshi, Mohit, Sandip Patel, and Harshadkumar Patel. "Synthesis, Characterization and Antimicrobial activity of Novel Benzimidazole Containing Ligand and Its Metal Complexes." Oriental Journal Of Chemistry 39, no. 4 (August 30, 2023): 1071–75. http://dx.doi.org/10.13005/ojc/390435.

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The novel ligand, 2-(1-(5-methyl-1H-benzimidazol-1-yl)propan-2-ylidene)hydrazine carbothioamide (MBITS) was synthesised from 5-methyl-1-(1H-Benzimidazol-1-yl)-2-propanone (MBIP) and Thiosemicarbazone. The metal complexes of MBITS were synthesised from Transition metal ions. The synthesised ligand MBITS and synthesised metal complexes were charachacterised by elemental analysis, spectroscopic analysis, raatio of metal : ligand and magnetic properties. The ligand MBITS and metal complexes also were screened for Antimirobial activity.

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16

Malček, Michal, Júlia Kožíšková, Peter Herich, Peter Rapta, Iryna Stepanenko, and Vladimir B. Arion. "Formation of metal-radical species upon reduction of late transition metal complexes with heteroleptic ligands: an experimental and theoretical study." New Journal of Chemistry 44, no. 30 (2020): 13195–206. http://dx.doi.org/10.1039/d0nj02447c.

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17

Kumar, K., and N. Santhi. "Synthesis, Complexation, Spectral and Antimicrobial Study of Some Novel 5-Bromo-2-Fluorobenzaldehydeoxime." International Letters of Chemistry, Physics and Astronomy 8 (September 2013): 46–52. http://dx.doi.org/10.18052/www.scipress.com/ilcpa.8.46.

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In this newly approached method a novel series of Transition metal complexes were synthesized by the reaction of 5-bromo-2-fluorobenzaldehyde (1) react with hydroxylamine in ethanolic solution at room temperature. Mononuclear complexes were synthesized by reaction with Cu(II), Zn(II) and Hg(II) chloride salts. The complexes were characterized by elemental analysis, Ultraviolet, Infrared and 1HNMR spectral studies. The antimicrobial activities of the ligand and its metal complexes were estimated.

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18

Kumar, K., and N. Santhi. "Synthesis, Complexation, Spectral and Antimicrobial Study of Some Novel 5-Bromo-2-Fluorobenzaldehydeoxime." International Letters of Chemistry, Physics and Astronomy 8 (February 19, 2013): 46–52. http://dx.doi.org/10.56431/p-4y2l4c.

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In this newly approached method a novel series of Transition metal complexes were synthesized by the reaction of 5-bromo-2-fluorobenzaldehyde (1) react with hydroxylamine in ethanolic solution at room temperature. Mononuclear complexes were synthesized by reaction with Cu(II), Zn(II) and Hg(II) chloride salts. The complexes were characterized by elemental analysis, Ultraviolet, Infrared and 1HNMR spectral studies. The antimicrobial activities of the ligand and its metal complexes were estimated.

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19

Chohan, Zahid H., Asifa Munawar, and Claudiu T. Supuran. "Transition Metal Ion Complexes of Schiff-bases. Synthesis, Characterization and Antibacterial Properties." Metal-Based Drugs 8, no. 3 (January 1, 2001): 137–43. http://dx.doi.org/10.1155/mbd.2001.137.

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Some novel transition metal [Co(II), Cu(II), Ni(II) and Zn(II)] complexes of substituted pyridine Schiff-bases have been prepared and characterized by physical, spectral and analytical data. The synthesized Schiff-bases act as deprotonated tridentate for the complexation reaction with Co(II), Ni(II) and Zn(II) ions. The new compounds, possessing the general formula [M(L)2] where [M=Co(II), Cu(II), Ni(II) and Zn(II) and HL=HL1, HL2, HL3 and HL4] show an octahedral geometry. In order to evaluate the effect of metal ions upon chelation, the Schiff bases and their complexes have been screened for antibacterial activity against the strains such as Escherichia coli,Staphylococcus aureus, and Pseudomonas aeruginosa. The complexed Schiff bases have shown to be more antibacterial against one more bacterial species as compared to uncomplexed Schiff-bases.

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20

Gregson, Charlotte K. A., Nicholas J. Long, Andrew J. P. White, and David J. Williams. "Novel Sterically Hindered Substituted Ferrocenes and Their Transition Metal Complexes." Organometallics 23, no. 15 (July 2004): 3674–82. http://dx.doi.org/10.1021/om049775x.

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21

Erker, Gerhard. "Bimetallic transition metal carbene complexes—some novel aspects and developments." Polyhedron 7, no. 22-23 (January 1988): 2451–63. http://dx.doi.org/10.1016/s0277-5387(00)86366-4.

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22

Berridge, R., N. Bricklebank, D. W. Allen, P. J. Skabara, K. M. A. Malik, S. J. Coles, and M. B. Hursthouse. "Novel transition metal complexes based on covalently linked DMIT systems." Synthetic Metals 120, no. 1-3 (March 2001): 1023–24. http://dx.doi.org/10.1016/s0379-6779(00)01076-6.

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23

Sunada, Yusuke. "Construction of the Novel Transition Metal Complexes Bearing Disilametallacycle Skeleton." Bulletin of Japan Society of Coordination Chemistry 67 (2016): 47–61. http://dx.doi.org/10.4019/bjscc.67.47.

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24

Oza, Kaushal K., Paresh N. Patel, and Hasmukh S. Patel. "Synthesis of some novel divalent transition metal complexes as antimicrobials." Chinese Chemical Letters 22, no. 8 (August 2011): 935–38. http://dx.doi.org/10.1016/j.cclet.2011.01.025.

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25

HIDAI, M., and Y. ISHII. "ChemInform Abstract: Novel Carbonylation Reactions Catalyzed by Transition Metal Complexes." ChemInform 27, no. 34 (August 5, 2010): no. http://dx.doi.org/10.1002/chin.199634286.

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26

Minkovich, Boris, Alexander Kaushansky, Natalia Fridman, Dmitry Bravo-Zhivotovskii, and Yitzhak Apeloig. "η2-Phosphasilene transition metal complexes – a novel building block for hetero-multimetallic complexes." Mendeleev Communications 32, no. 1 (January 2022): 28–32. http://dx.doi.org/10.1016/j.mencom.2022.01.008.

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27

Fujita, Ken-ichi, Masakazu Ikeda, Teruyuki Kondo, and Take-aki Mitsudo. "Novel Early-late Transition Metal Complexes. The First Thiolato Bridged Titanium-Ruthenium Complexes." Chemistry Letters 26, no. 1 (January 1997): 57–58. http://dx.doi.org/10.1246/cl.1997.57.

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28

Patel, Yogesh S. "Studies on Oligomer Metal Complexes Derived from Bisamic Acid of Pyromellitic Dianhydride and 4-Bromoaniline." International Scholarly Research Notices 2014 (October 30, 2014): 1–7. http://dx.doi.org/10.1155/2014/516274.

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Novel oligomer metal complexes (2a–f) of the ligand 2,5-bis((4-bromophenyl)carbamoyl) terephthalic acid (1) were prepared using transition metal salts and characterized by various spectroscopic techniques. The geometry of oligomer metal complexes was carried out by electronic spectral analysis and magnetic measurement studies. Polymeric properties have also been carried out. Ligand was synthesized using pyromellitic dianhydride and 4-bromoaniline. It was duly characterized. All novel synthesized compounds 1 and 2a–f were evaluated for their antibacterial and antifungal activity. The results showed significantly higher antibacterial and antifungal activity of oligomer metal complexes compared to the ligand.

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29

Alsayeed, Raghda, Dalia Mahmood Jamil, Huda Ghalib Salman, and Mohammed H. Al-Mashhadani. "Synthesis of Novel Trimethoprim Complexes and Their Analysis by Ultraviolet Derivative Spectroscopy." Materials Science Forum 1021 (February 2021): 200–209. http://dx.doi.org/10.4028/www.scientific.net/msf.1021.200.

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In this research, the actions of antibiotic trimethoprim alone and with metals combained. Then assayed through formation of base transition metal compounds as ligands have the chance to achieve an unusual arrangement and stability complexes of coordination. We show advancement in using transtional metal compounds medications for treamentt manyl human illnesses such as carcinomas, lymphomas, control of infections, anti-inflammatory disorders, diabetes, with neurological conditions. This combination with transition metal observed the interaction can be separated by derivative spectroscopic method and measure the characterization of compound by IR and UV spectroscopy.

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30

Suganya, M., and G. Puthilibai. "Synthesis, Spectral Characterization, Antibacterial and Anticancer Evaluation of Novel Isoniazid based Schiff Base Ligand derived Transition Metal Complexes." Asian Journal of Chemistry 36, no. 3 (February 28, 2024): 579–85. http://dx.doi.org/10.14233/ajchem.2024.30955.

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A novel isoniazid based Schiff base ligand was synthesized by the condensation of 5-acetyl-N-(adamantan-2-yl)thiophene-2-carboxamide (1 mmol) and isoniazid (1 mmol). Metal complexes were prepared by reacting the Schiff base with metal(II) chloride (M = Ni2+, Cu2+ and Co2+), formed the novel metal coordination compound. The synthesized ligand and metal complexes were characterized by 1H NMR, mass spectral, UV-visible, IR & EPR spectral studies, themogravimetric analysis, cyclic voltametry and were screened with both Gram-positive and Gram-negative bacterias to evaluate the antibacterial activity by disc diffusion method. The zone of inhibition of the antibacterial assay demonstrated that all the three metal(II) complexes are active against the four bacterias, showed increased activity with increase in concentration and is more active against S. aureas at all concentrations. The systhesized complexes were also evaluated for its anticancer activities, only Ni(II) and Co(II) complexes showed the moderate levels of cytotoxicity activity.

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31

ROSU, Tudor, Angela KRIZA, Viorel CARCU, and Anca NICOLAE. "TRANSITION METAL COMPLEXES OF THE FORMYL VANILLINE DERIVATIVES LIGAND FAMILY." SOUTHERN BRAZILIAN JOURNAL OF CHEMISTRY 5, no. 5 (December 20, 1997): 67–77. http://dx.doi.org/10.48141/sbjchem.v5.n5.1997.68_1997.pdf.

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Divalent 3d metal complexes with formyl-vanilline derivatives, of lite type ML2 or ML2X2 (M = Cu(II), Co(II); X = Cl), were sythesized by reaction of the corresponding metal(II) chlorides with 1-[3-formyl-4-methoxy-6-hidroxybemilydene]-2-phenazinoyllhydrazine, (FDFH), 1-benzilydene-2-phenazinoyhydrazine, (BFH), and 3-formyl-5,6-dihydroxybemilydenc-2-nitro-1--methylaniline, (FBAH). The novel complexes were characterized by ESR, IR, electronic spectroscopy, molar electric conductibility measurements and magnctk studies. These compounds appear to bn hexacoordinated.

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32

Wałęsa-Chorab, Monika, Adam Gorczyński, Damian Marcinkowski, Zbigniew Hnatejko, and Violetta Patroniak. "Supramolecular complexes of cobalt(II), manganese(II) and cadmium(II) with bis(terpyridine) ligand as novel luminescent materials." Polish Journal of Chemical Technology 15, no. 3 (September 1, 2013): 91–95. http://dx.doi.org/10.2478/pjct-2013-0052.

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Abstract Self-assembly of N6-donor bis(terpyridine) ligand L with transition metal ions: Co(II), Mn(II) and Cd(II) leads to a formation of three kinds of supramolecular complexes. In the electronic absorption and emission spectra of supramolecular complexes additional bands were observed what was ascribed to the coordination of ligand molecules to metal ions. Luminescence properties of these complexes strongly depend on the kind of metal ions and counter ions. The effective blue luminescence was observed in the case of Mn(II) and Cd(II) complexes in which all N-donor atoms of ligand molecules coordinate with the metal center

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33

Wilhelmi, Caroline, Maximilian Gaffga, Yu Sun, Gereon Niedner-Schatteburg, and Werner R. Thiel. "A Novel Bifunctional Ligand for the Synthesis of Polynuclear Alkynyl Complexes." Zeitschrift für Naturforschung B 69, no. 11-12 (December 1, 2014): 1290–98. http://dx.doi.org/10.5560/znb.2014-4164.

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Abstract The synthesis of 2-(1-(prop-2-yn-1-yl)-1H-pyrazol-3-yl)pyridine is presented. This ligand contains both, an alkynyl function being suitable for metal-carbon bond formation with electron-rich late transition metal sites, and a pyrazolylpyridine unit, which is well-known to undergo chelation reactions similar to 2,2′-bipyridine. This strategy allows building up polynuclear complexes with broad combinations of different metal sites. Two platinum alkynyl complexes were structurally characterized, and a trinuclear Ru2Pt complex was indentified by means of NMR spectroscopy and ESI mass spectrometry.

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34

Jain, Rajendra, and Anand Mishra. "Microwave synthesis and spectral, thermal and antimicrobial activities of some novel transition metal complexes with tridentate Schiff base ligands." Journal of the Serbian Chemical Society 77, no. 8 (2012): 1013–29. http://dx.doi.org/10.2298/jsc111001023j.

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Some novel Schiff base metal complexes of Cr(III), Co(II), Ni(II) and Cu(II) derived from 2-[(5-bromo-2-hydroxybenzylidene)amino]pyridin-3-ol (BSAP) and {5-chloro-2-[(2-hydroxynaphthylidene)amino]phenyl}-phenylmethanone (HNAC) were synthesized by conventional as well as microwave methods. These compounds were characterized by elemental analysis, FT-IR, FAB-mass, molar conductance, electronic spectra, ESR, magnetic susceptibility, thermal, cyclic voltammetry, electrical conductivity and XRD analyses. Analytical data revealed that all the complexes exhibited 1:1 (metal:ligand) ratio with coordination number 4 or 6. IR data showed that the ligand coordinates with the metal ions in a tridentate manner. FAB-mass and thermal data showed degradation pattern of the complexes. The thermal behaviour of metal complexes showed that the hydrated complexes lose water molecules of hydration in the first step; followed by decomposition of ligand molecules in the subsequent steps. The crystal system, lattice parameter, unit cell volume and number of molecules in unit cell in the lattice of complexes were determined by XRD analysis. XRD patterns indicate crystalline nature for the complexes. The solid state electrical conductivity of the metal complexes was also measured. Solid state electrical conductivity studies reflect semiconducting nature of the complexes. The Schiff base and metal complexes displayed a good activity against the Gram-positive bacteria; Staphylococcus aureus and Gram-negative bacteria; Escherichia coli and fungi Aspergillus niger and Candida albicans. The antimicrobial results also indicate that the metal complexes displayed better antimicrobial activity as compared to the Schiff bases.

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35

Shang, Di, Juechen Ni, Xinyu Gao, Chengren Li, Xiaomeng Lin, Zhinan Wang, Ning Du, Shuang Li, and Yongheng Xing. "Various structures of complexes fabricated using transition metals and triazole ligands and their inhibition effects on xanthine luminescence." New Journal of Chemistry 40, no. 9 (2016): 8100–8109. http://dx.doi.org/10.1039/c6nj01503d.

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36

Dong, Ruoting, Xinli Chen, Qianhong Li, Mingyuan Hu, Lanfen Huang, Chuwen Li, Moyuan Shen, and Hong Deng. "((1H-tetrazol-5-yl) methyl) pyridine-based metal coordination complexes: in situ tetrazole synthesis, crystal structures, luminescence properties." CrystEngComm 17, no. 6 (2015): 1305–17. http://dx.doi.org/10.1039/c4ce01981d.

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37

Khan, Shamshad Ahmad, Kamlesh Kumar Singh, and Jahan Ara Khatoon. "Synthesis, characterization and microbiological screening of some transition metal complexes with nitrogen containing macrocyclic ligand." Research Journal of Chemistry and Environment 27, no. 2 (January 15, 2023): 30–34. http://dx.doi.org/10.25303/2702rjce030034.

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A novel macrocyclic Schiff base ligand 1,4,8,11-tetraaza-2,3,9,10-tetramethyl cyclotetradeca-1,3,8,10-tetraene was synthesized by condensation between butane-2,3-dione and propane-1,3-diamine in an alcoholic medium. The complexes of Co(II), Ni(II), Cu(II) and Zn(II) with Schiff base have been prepared from metal salts in an alcoholic medium. The synthesized Schiff base and its metal complexes are characterized by elemental analysis, molar conductance measurements, magnetic susceptibility, FTIR and electronic absorption spectral data. The higher molar conductance values of these metal complexes show their electrolytic nature. The Schiff base behaves as tetradentate ligand. The general molecular formula of the metal complexes has been found to be [M(L)(X)2] where M= Co(II), Ni(II), Cu(II) and Zn(II) , L=Schiff base and X= water, chlorine and ethanol . Thus, on the basis of elemental analysis and spectral studies octahedral geometry was assigned to metal complexes. The synthesized metal complexes showed more antimicrobial activity than free Schiff base ligand.

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38

Mumtaz, Amina, Tariq Mahmud, M. R. J. Elsegood, and G. W. Weaver. "Synthesis, Characterization and in vitro Biological Evaluation of a New Schiff Base Derived from Drug and its Complexes with Transition Metal Ions." Revista de Chimie 69, no. 7 (August 15, 2018): 1678–81. http://dx.doi.org/10.37358/rc.18.7.6393.

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New series of copper (II), cobalt (II), zinc (II), nickel (II), manganese (II), iron (II) complexes of a novel Schiff base were prepared by the condensation of sulphadizine and pyridoxal hydrochloride. The ligand and metal complexes were characterized by utilizing different instrumental procedures like microanalysis, thermogravimetric examination and spectroscopy. The integrated ligand and transition metal complexes were screened against various bacteria and fungus. The studies demonstrated the enhanced activity of metal complexes against reported microbes when compared with free ligand.

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39

Czarnomysy, Robert, Dominika Radomska, Anna Muszyńska, Justyna Magdalena Hermanowicz, Izabela Prokop, Anna Bielawska, and Krzysztof Bielawski. "Evaluation of the Anticancer Activities of Novel Transition Metal Complexes with Berenil and Nitroimidazole." Molecules 25, no. 12 (June 21, 2020): 2860. http://dx.doi.org/10.3390/molecules25122860.

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Novel transition metal complexes (Au, Pd, Pt) with berenil and 2-(1-methyl-5-nitroimidazol-2-yl)ethanol were obtained through two-step synthesis. The cytotoxicity assay against MCF-7 and MDA-MB-231 breast cancer cells revealed that novel platinum and palladium complexes cause a reduction on the viability of MCF-7 and MDA-MB-231 breast cancer cells to a greater extent than cisplatin. The complexes showed lower cytotoxicity on normal MCF-10A human breast epithelial cells than on tumor cells. Furthermore, we observed that these complexes selectively concentrate in tumor cell mitochondria due to the characteristic for these cells increased membrane potential that may explain their increased proapoptotic activity. The activity of the synthesized compounds against topoisomerase type IIα and their increased impact on DNA defragmentation also were documented. The novel complexes also induced autophagosome changes and inhibited tumor growth in xenograft models (established using breast cancer cells).

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40

Adhao, Sopan Tejrao, and Rahul Ramchandra Wagh. "Synthesis, Spectral, Thermal Studies and Antimicrobial Evaluation of Transition Metal Complexes with Novel Schiff Base Ligand." Oriental Journal Of Chemistry 40, no. 1 (February 25, 2024): 142–51. http://dx.doi.org/10.13005/ojc/400118.

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A novel coumarin Schiff base “(E)-7-hydroxy-4-methyl-8-(1-(1-(naphthalen-2-yl) ethylimino) ethyl)-2H-chromen-2-one” [HOMNEIEC] ligand was synthesized by the condensation of “8-acetyl-7-hydroxy-4-methyl-2H-chromen-2-one” [AHMC] with “1-(naphthalen-1-yl) ethylamine” [NEA]. The transition metal (II) ions complexes with this ligand were synthesized by a common method. The synthesized ligand and metal (II) complexes were studied using spectral (1H NMR, FTIR, Mass Spectrometry) and thermal (TGA) techniques for their structures. The 1H NMR and FTIR spectra of ligand confirm the formation of azomethine bond. The FTIR spectral data validated the formation of coordinate bond through phenolic oxygen on coumarin ring and nitrogen of azomethine with the metal ions. The m/z values in mass spectrum of ligand and its metal complexes were in agreement with their theoretical values of molecular/formula weights. The TGA thermograms suggested there are of two coordinated/lattice H2O molecules in each of the complex. The ligand and metal complexes were evaluated for their in vitro antimicrobial activities using broth microdilution method using DMSO solvent/diluent against Escherichia coli and Pseudomonas aeruginosa a gram-negative bacterial strain, Staphylococcus aureus and Streptococcus pyogenes a gram-positive bacterial strain, and Candida albicans, Aspergillus clavatus and Aspergillus niger a fungal strain. The metal complexes were found to have enhanced antimicrobial activities compare to the Schiff base ligand.

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41

Bi, Dongqin, Yuquan Feng, Qian Zhao, Hongwei Wang, Yongsheng Zhu, Xiaoyu Bao, Huitao Fan, Lintao Yu, Qichao Yang, and Dongfang Qiu. "Synthesis, crystal structure, photophysical property and metal ion-binding behavior of a cyclometalated platinum(ii) terpyridylacetylide with efficient π-conjugation degree." RSC Adv. 7, no. 74 (2017): 46980–88. http://dx.doi.org/10.1039/c7ra09423j.

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42

Sakthipriya, Pachiannan, and Nallamuthu Ananthi. "Asymmetric epoxidation of alkenes catalyzed by novel chiral porphyrin metal complexes." Journal of Porphyrins and Phthalocyanines 20, no. 06 (June 2016): 730–37. http://dx.doi.org/10.1142/s1088424616500620.

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Novel chiral porphyrin ligands were synthesized from four different chiral aldehydes. In situ transition metal complexes of these novel chiral porphyrin ligands were found to catalyze asymmetric epoxidation reaction of styrene possessing various substituents. The chiral epoxides were formed in excellent yield and ee.

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43

Cassoux, Patrick, and Leonard V. Interrante. "Novel Solid State Materials Derived from Transition Metal Bis-dithiolene Complexes." Comments on Inorganic Chemistry 12, no. 1 (May 1991): 47–66. http://dx.doi.org/10.1080/02603599108018619.

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44

Bernhardt, Paul V., Peter Comba, Anne Mahu-Rickenbach, Sandra Stebler, Silvio Steiner, Katalin Varnagy, and Margareta Zehnder. "Transition metal complexes of the novel tridentate di-2-pyridylmethanamine (dipa)." Inorganic Chemistry 31, no. 20 (September 1992): 4194–200. http://dx.doi.org/10.1021/ic00046a038.

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Sams, Christian Klarner, Fernando Somoza, Ivan Bernal, and Hans Toftlund. "Coordination chemistry of transition metal complexes of a novel pentadentate ligand." Inorganica Chimica Acta 318, no. 1-2 (June 2001): 45–52. http://dx.doi.org/10.1016/s0020-1693(01)00410-8.

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46

Malik, Rayees Ahmad, Nawaz Gulzar Bhat, Renu Yadav, Navjot Singh, Gulshan Kumar, and Suraj Mal. "Synthesis of Novel Tetrazole Transition Metal Complexes for Advanced Photonic Applications." Asian Journal of Chemistry 30, no. 3 (2018): 520–24. http://dx.doi.org/10.14233/ajchem.2018.20947.

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47

Clark, T. Jeffrey, Terence A. Nile, Donald McPhail, and Andrew T. McPhail. "Synthesis of novel substituted cyclopentadienes and their early transition metal complexes." Polyhedron 8, no. 13-14 (January 1989): 1804–6. http://dx.doi.org/10.1016/s0277-5387(00)80652-x.

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Dehe, Daniel, Christian Lothschütz, and Werner R. Thiel. "Novel pyrazole functionalized phthalocyanines and their first row transition metal complexes." New Journal of Chemistry 34, no. 3 (2010): 526. http://dx.doi.org/10.1039/b9nj00485h.

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Hong, Zhou, Peng Zheng-He, Pan Zhi-Quan, Liu Bo, Hu Xue-Lei, and Liu Yong-Qiong. "Novel heterodinuclear transition metal macrocyclic complexes: syntheses, characterization and crystal structures." Journal of Coordination Chemistry 58, no. 5 (March 20, 2005): 443–51. http://dx.doi.org/10.1080/00958970412331336286.

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Jirgi, Bhikshappa S., Gopal L. Tembe, Maruti H. Sonar, and A. Sitaramachandra Murty. "Transition metal complexes of novel tridentate S,N,O donor ligands." Transition Metal Chemistry 18, no. 2 (April 1993): 171–74. http://dx.doi.org/10.1007/bf00139950.

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