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Villaman D, Vega A, Santa Maria de la Parra L, León IE, Levín P, Toro PM. Anticancer activity of Ni(II) and Zn(II) complexes based on new unsymmetrical salophen-type ligands: synthesis, characterization and single-crystal X-ray diffraction. Dalton Trans 2023; 52:10855-10868. [PMID: 37486008 DOI: 10.1039/d3dt00800b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2023]
Abstract
The discovery of new coordination compounds with anticancer properties is an active field of research due to the severe side effects of platinum-based compounds currently used in chemotherapy. In the search for new agents for the treatment of cancer, unsymmetrical N2O2-tetradentate ligand (H2L1 and H2L2) and their Ni(II) and Zn(II) asymmetric complexes (NiII-L1-2 and ZnII-L1-2) have been synthesized and fully characterized. 1H NMR studies revealed that the ligands and complexes were stable in mixtures of DMSO : D2O (9 : 1). Complementary UV-Vis studies confirmed that ZnII derivatives also exhibit high stability in mixtures DMSO : buffer (6 : 4) after 24 h. Single-crystal X-ray diffraction studies confirmed the molecular structures of H2L1, H2L2, NiII-L1, and NiII-L2. At the molecular level, complexes were completely planar without significant distortions of the square-planar geometry according to τ4 parameter. Furthermore, the crystalline structures revealed non-classical intermolecular interactions of the C-H⋯O and the Ni⋯Ni type. The ligands and complexes were screened against the human osteosarcoma (MG-63), human colon cancer (HCT-116), breast cancer (MDA-MB-231) cell lines, and non-cancerous cells (L929). H2L1 and H2L2 ligands not caused cytotoxic effects at a concentration of 100 μM, while NiII-L2, ZnII-L1, and ZnII-L2 complexes induce cytotoxic effects in all cell lines. NiII-L2 was a more active complex against MG-63 (3.9 ± 1.5) and HCT-116 (3.4 ± 1.7) cell lines with IC50 values in the low micromolar range. In addition, this compound was 10-, 5-, and 11-fold more potent than cisplatin in MG-63 (39 ± 1.8), HCT-116 (17.2), and MDA-MB-231 (131 ± 18), respectively. Three complexes exhibited great selectivity for tumoral cells with SI values ranging from 1.6 to 7.4.
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Affiliation(s)
- David Villaman
- Laboratorio de Química Inorgánica y Organometálica, Facultad de Cs. Química, Universidad de Concepción, Chile.
| | - Andrés Vega
- Universidad Andrés Bello, Facultad de Ciencias Exactas, Departamento de Ciencias Químicas, Av. República 498, Santiago, Chile
| | - Lucía Santa Maria de la Parra
- CEQUINOR (UNLP, CCT-CONICET La Plata, Asociado a CIC), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Blvd. 120 No. 1465, La Plata 1900, Argentina
| | - Ignacio E León
- CEQUINOR (UNLP, CCT-CONICET La Plata, Asociado a CIC), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Blvd. 120 No. 1465, La Plata 1900, Argentina
- Cátedra de Fisiopatología, Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 y 115, La Plata 1900, Argentina
| | - Pedro Levín
- Departamento de Química de los Materiales, Facultad de Química y Biología, Universidad de Santiago de Chile, Av. Libertador Bernardo O'Higgins 3363, Estación Central, Santiago, Chile
| | - Patricia M Toro
- Instituto de Ciencias Aplicadas, Facultad de Ingeniería, Universidad Autónoma de Chile, Talca, Chile.
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2
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Oliveri IP, Consiglio G, Munzi G, Failla S, Di Bella S. Deaggregation properties and transmetalation studies of a zinc(II) salen-type Schiff-base complex. Dalton Trans 2022; 51:11859-11867. [PMID: 35876090 DOI: 10.1039/d2dt01448c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
This paper reports the synthesis and the deaggregation properties of a Lewis acidic Zn(II) salen-type Schiff-base complex derivative from diaminomaleonitrile and a systematic detailed study of its transmetalation with other metal ions in solution. In a solution of non-coordinating solvents, the complex is in a dimeric form, while in coordinating solvents or upon addition of a Lewis base it is stabilized as monomeric adducts. Experiments done in two solvents with different Lewis basicities indicate a major role of the stability of the starting adduct in transmetalation. Thus, using nitrate or perchlorate salts, acetonitrile solutions of the complex give an immediate and complete transmetalation with Cu2+, while with Co2+ and Ni2+ a much slower transmetalation rate is observed. Instead, using chloride salts a fast and complete transmetalation is observed for divalent ions of the first transition series (Mn2+, Fe2+, Co2+, Ni2+, Cu2+), indicating the role of the chloride in stabilizing the transition state of the transmetalation. On the other hand, DMF solutions of the complex are less prone to transmetalation, according with the greater basicity of the solvent and, hence, the greater stability of the related adducts with the complex. Therefore, the nature of the solvent and the counteranion allow controlling the transmetalation process of this Zn(II) Schiff-base complex.
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Affiliation(s)
- Ivan Pietro Oliveri
- Dipartimento di Scienze Chimiche, Università di Catania, I-95125 Catania, Italy.
| | - Giuseppe Consiglio
- Dipartimento di Scienze Chimiche, Università di Catania, I-95125 Catania, Italy.
| | - Gabriella Munzi
- Dipartimento di Scienze Chimiche, Università di Catania, I-95125 Catania, Italy.
| | - Salvatore Failla
- Dipartimento di Scienze Chimiche, Università di Catania, I-95125 Catania, Italy.
| | - Santo Di Bella
- Dipartimento di Scienze Chimiche, Università di Catania, I-95125 Catania, Italy.
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3
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Monitoring the Substrate‐Induced Spin‐State Distribution in a Cobalt(II)‐Salen Complex by EPR and DFT. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202101071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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4
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A mixed-valent high spin (μ-hydroxo)dicobalt(II/III) complex and its end-on type dioxygen adduct: synthesis, geometric and electronic structure studies. Sci China Chem 2021. [DOI: 10.1007/s11426-021-1042-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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5
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Devonport J, Spencer J, Kostakis GE. Breaking the symmetry: C1-salans with (N-H) backbones. Dalton Trans 2021; 50:12069-12073. [PMID: 34373864 DOI: 10.1039/d1dt01950c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We disclose a synthetic route that providess an unprecedented library of C1 salan ligands endowed with (N-H) backbones, previously limited to N-methylated backbones. Efforts to identify a generic complexation protocol to yield the corresponding Cu(II)-salan complexes demonstrate the scope and limitations of this approach.
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Affiliation(s)
- Jack Devonport
- Department of Chemistry, School of Life Sciences, University of Sussex, Brighton, BN1 9QJ, UK.
| | - John Spencer
- Department of Chemistry, School of Life Sciences, University of Sussex, Brighton, BN1 9QJ, UK.
| | - George E Kostakis
- Department of Chemistry, School of Life Sciences, University of Sussex, Brighton, BN1 9QJ, UK.
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6
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An electrochemical study of cobalt-salen (N,N′-bis(salicylidene)ethylenediaminocobalt(II) in the oxidation of syringyl alcohol in acetonitrile. J APPL ELECTROCHEM 2020. [DOI: 10.1007/s10800-020-01459-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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7
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Shukla SN, Gaur P, Raidas ML, Chaurasia B. Tailored synthesis of unsymmetrical tetradentate ONNO schiff base complexes of Fe(IIl), Co(II) and Ni(II): Spectroscopic characterization, DFT optimization, oxygen-binding study, antibacterial and anticorrosion activity. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.127362] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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9
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Filkale AE, Pathak C. Dinuclear cobalt complexes supported by biphenol and binaphthol-derived bis(salicylaldimine) ligands: synthesis, characterization and catalytic application in β-enaminone synthesis from 1,3-dicarbonyl compounds and aliphatic amines. NEW J CHEM 2020. [DOI: 10.1039/d0nj00052c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Biaryl scaffolding ligands form dicobalt clusters, which serve as efficient catalysts in enaminone synthesis under ambient conditions.
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Affiliation(s)
| | - Chandni Pathak
- Department of Applied Chemistry
- Jabalpur Engineering College
- Jabalpur
- India
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10
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Thermodynamics of complex formation in dimethylsulfoxide: The case of Co(II) complexes with nitrogen donor ligands and their O2 adducts. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2019.04.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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11
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Novozhilova MV, Smirnova EA, Polozhentseva JA, Danilova JA, Chepurnaya IA, Karushev MP, Malev VV, Timonov AM. Multielectron redox processes in polymeric cobalt complexes with N2O2 Schiff base ligands. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.06.030] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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12
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Gogoi K, Saha S, Mondal B, Deka H, Ghosh S, Mondal B. Dioxygenation Reaction of a Cobalt-Nitrosyl: Putative Formation of a Cobalt–Peroxynitrite via a {CoIII(NO)(O2–)} Intermediate. Inorg Chem 2017; 56:14438-14445. [PMID: 29131596 DOI: 10.1021/acs.inorgchem.7b01673] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kuldeep Gogoi
- Department of Chemistry, Indian Institute of Technology Guwahati, North Guwahati, Assam 781039, India
| | - Soumen Saha
- Department of Chemistry, Indian Institute of Technology Guwahati, North Guwahati, Assam 781039, India
| | - Baishakhi Mondal
- Department of Chemistry, Indian Institute of Technology Guwahati, North Guwahati, Assam 781039, India
| | - Hemanta Deka
- Department of Chemistry, Indian Institute of Technology Guwahati, North Guwahati, Assam 781039, India
| | - Somnath Ghosh
- Department of Chemistry, Indian Institute of Technology Guwahati, North Guwahati, Assam 781039, India
| | - Biplab Mondal
- Department of Chemistry, Indian Institute of Technology Guwahati, North Guwahati, Assam 781039, India
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6-(2-Quinolinyl)-2,2′-bipyridine ruthenium complexes for near-infrared sensitization in dye-sensitized solar cells. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2017.04.030] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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14
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Clarke RM, Hazin K, Thompson JR, Savard D, Prosser KE, Storr T. Electronic Structure Description of a Doubly Oxidized Bimetallic Cobalt Complex with Proradical Ligands. Inorg Chem 2015; 55:762-74. [DOI: 10.1021/acs.inorgchem.5b02231] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Ryan M. Clarke
- Department
of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Khatera Hazin
- Department
of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - John R. Thompson
- Department
of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Didier Savard
- Department
of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Kathleen E. Prosser
- Department
of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Tim Storr
- Department
of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
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15
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Wang FS, Yang TY, Hsu CC, Chen YJ, Li MH, Hsu YJ, Chuang MC, Peng CH. The Mechanism and Thermodynamic Studies of CMRP: Different Control Mechanisms Demonstrated by CoII
(TMP), CoII
(salen*), and CoII
(acac)2
Mediated Polymerization, and the Correlation of Reduction Potential, Equilibrium Constant, and Control Mechanism. MACROMOL CHEM PHYS 2015. [DOI: 10.1002/macp.201500311] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Fu-Sheng Wang
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters; National Tsing Hua University; No. 101, Sec 2, Kuang-Fu Rd. Hsinchu 30013 Taiwan
| | - Tsung-Yao Yang
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters; National Tsing Hua University; No. 101, Sec 2, Kuang-Fu Rd. Hsinchu 30013 Taiwan
| | - Ching-Chun Hsu
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters; National Tsing Hua University; No. 101, Sec 2, Kuang-Fu Rd. Hsinchu 30013 Taiwan
| | - Ya-Jo Chen
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters; National Tsing Hua University; No. 101, Sec 2, Kuang-Fu Rd. Hsinchu 30013 Taiwan
| | - Ming-Han Li
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters; National Tsing Hua University; No. 101, Sec 2, Kuang-Fu Rd. Hsinchu 30013 Taiwan
| | - Yu-Jie Hsu
- Department of Chemistry; Tunghai University; No. 1727, Sec. 4, Taiwan Boulevard, Xitun District Taichung 40704 Taiwan
| | - Min-Chieh Chuang
- Department of Chemistry; Tunghai University; No. 1727, Sec. 4, Taiwan Boulevard, Xitun District Taichung 40704 Taiwan
| | - Chi-How Peng
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters; National Tsing Hua University; No. 101, Sec 2, Kuang-Fu Rd. Hsinchu 30013 Taiwan
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Zhao Y, Yu M, Zhang S, Wu Z, Liu Y, Peng CH, Fu X. A well-defined, versatile photoinitiator (salen)Co-CO 2CH 3 for visible light-initiated living/controlled radical polymerization. Chem Sci 2015; 6:2979-2988. [PMID: 29308172 PMCID: PMC5656039 DOI: 10.1039/c5sc00477b] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2015] [Accepted: 03/05/2015] [Indexed: 12/27/2022] Open
Abstract
The control of the polymerization of a wide range of monomers under mild conditions by a single catalyst remains a major challenge in polymer science. We report a versatile, well-defined organocobalt salen complex to control living radical polymerization of different categories of monomers, including acrylates, acrylamides and vinyl acetate, under visible light irradiation at ambient temperature. Both household light and sunlight were effectively applied in the synthesis of polymers with controlled molecular weights and narrow polydispersities. Narrowly dispersed block copolymers (Mw/Mn < 1.2) were obtained under various conditions. The structures of the polymers were analyzed by 1H NMR, 2D NMR, 13C NMR, GPC, MALDI-TOF-MS and isotopic labeling experiments, which showed that the ω and α ends of the polymer chains were capped with (salen)Co and -CO2CH3 segments, respectively, from the photoinitiator (salen)Co-CO2CH3. The ω end was easily functionalized through oxygen insertion followed by hydrolysis from 18O2 to -18OH. This robust system can proceed without any additives, and offers a versatile and green way to produce well-defined homo and block copolymers.
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Affiliation(s)
- Yaguang Zhao
- Beijing National Laboratory for Molecular Sciences , State Key Lab of Rare Earth Materials Chemistry and Applications , College of Chemistry and Molecular Engineering , Peking University , Beijing , 100871 , China .
| | - Mengmeng Yu
- Beijing National Laboratory for Molecular Sciences , State Key Lab of Rare Earth Materials Chemistry and Applications , College of Chemistry and Molecular Engineering , Peking University , Beijing , 100871 , China .
| | - Shuailin Zhang
- Beijing National Laboratory for Molecular Sciences , State Key Lab of Rare Earth Materials Chemistry and Applications , College of Chemistry and Molecular Engineering , Peking University , Beijing , 100871 , China .
| | - Zhenqiang Wu
- Beijing National Laboratory for Molecular Sciences , State Key Lab of Rare Earth Materials Chemistry and Applications , College of Chemistry and Molecular Engineering , Peking University , Beijing , 100871 , China .
| | - Yuchu Liu
- Beijing National Laboratory for Molecular Sciences , State Key Lab of Rare Earth Materials Chemistry and Applications , College of Chemistry and Molecular Engineering , Peking University , Beijing , 100871 , China .
| | - Chi-How Peng
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters , National Tsing-Hua University , Hsinchu , 30013 , Taiwan
| | - Xuefeng Fu
- Beijing National Laboratory for Molecular Sciences , State Key Lab of Rare Earth Materials Chemistry and Applications , College of Chemistry and Molecular Engineering , Peking University , Beijing , 100871 , China .
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Zaltariov MF, Vlad A, Cazacu M, Avadanei M, Vornicu N, Balan M, Shova S. Silicon-containing bis-azomethines: synthesis, structural characterization, evaluation of the photophysical properties and biological activity. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 138:38-48. [PMID: 25437843 DOI: 10.1016/j.saa.2014.11.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Revised: 10/23/2014] [Accepted: 11/05/2014] [Indexed: 06/04/2023]
Abstract
A new diamine, (dimethylsilanediyl)bis(methylene)bis(4-aminobenzoate) (1), containing dimethylsilane spacer, was prepared by the condensation of p-aminobenzoic acid with bis(chloromethyl)dimethylsilane. This was subsequently reacted with salicylaldehyde, 3-hydroxy-salicylaldehyde, and 3-methoxy-salicyladehyde, when corresponding Schiff bases (E)-(dimethylsilanediyl)bis(methylene)bis(4-((E)-(2-hydroxybenzilidene)amino)benzoate (2), (E)-(dimethylsilanediyl)bis(methylene)bis(4-((E)-(2-hydroxybenzilidene)amino)benzoate (3), and (E)-(dimethylsilanediyl)bis(methylene) bis(4-((E)-(2-hydroxy-3-methoxybenzilidene)amino)benzoate (4), respectively were formed. All the obtained compounds were structurally characterized by spectral (FT-IR, (1)HNMR, (13)CNMR) analyses and single crystal X-ray diffraction. Photophysical studies revealed that the new prepared Schiff bases are good UV light absorbing and fluorescent materials. Thus, they exhibit strong UV/Vis-absorption at 250-400nm and violet or orange emission, in sensitive dependence on the polarity of the solvents and the nature of the substituent (H, OH and OCH3) at the aromatic ring. The antimicrobial activity of these compounds was first studied in vitro by the disk diffusion assay against two species of bacteria and three fungi. The minimum inhibitory concentration was then determined with the reference of standard compounds. The results displayed that Schiff bases 3 and 4 having hydroxy- and methoxy-substituents on the aromatic ring were better inhibitors of both types of species (bacteria and fungi) than standard compounds, Caspofungin and Kanamycin.
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Affiliation(s)
| | - Angelica Vlad
- "Petru Poni" Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41A, 700487 Iaşi, Romania
| | - Maria Cazacu
- "Petru Poni" Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41A, 700487 Iaşi, Romania.
| | - Mihaela Avadanei
- "Petru Poni" Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41A, 700487 Iaşi, Romania
| | - Nicoleta Vornicu
- Metropolitan Center of Research TABOR, The Metropolitanate of Moldavia and Bukovina, Closca 9, 700066 Iaşi, Romania
| | - Mihaela Balan
- "Petru Poni" Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41A, 700487 Iaşi, Romania
| | - Sergiu Shova
- "Petru Poni" Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41A, 700487 Iaşi, Romania
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Emara AA, Ali AM, El-Asmy AF, Ragab ESM. Investigation of the oxygen affinity of manganese(II), cobalt(II) and nickel(II) complexes with some tetradentate Schiff bases. JOURNAL OF SAUDI CHEMICAL SOCIETY 2014. [DOI: 10.1016/j.jscs.2011.08.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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19
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Zhang G, Ta C, Cheng SY, Golen JA, Rheingold AL. Clicking thiourea into a salen scaffold: Structures and cytotoxicity of cobalt(II) and nickel(II) complexes. INORG CHEM COMMUN 2014. [DOI: 10.1016/j.inoche.2014.08.033] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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20
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Dumur F, Contal E, Wantz G, Gigmes D. Photoluminescence of Zinc Complexes: Easily Tunable Optical Properties by Variation of the Bridge Between the Imido Groups of Schiff Base Ligands. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402422] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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21
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Ebrahimi HP, Hadi JS, Abdulnabi ZA, Bolandnazar Z. Spectroscopic, thermal analysis and DFT computational studies of salen-type Schiff base complexes. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 117:485-492. [PMID: 24021948 DOI: 10.1016/j.saa.2013.08.044] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Revised: 08/05/2013] [Accepted: 08/08/2013] [Indexed: 06/02/2023]
Abstract
A new series of metal(II) complexes of Co(II), Ni(II), Cu(II), Zn(II), and Pb(II) have been synthesized from a salen-type Schiff base ligand derived from o-vanillin and 4-methyl-1,2-phenylenediamine and characterized by elemental analysis, spectral (IR, UV-Vis, (1)H NMR, (13)C NMR and EI-mass), molar conductance measurements and thermal analysis techniques. Coats-Redfern method has been utilized to calculate the kinetic and thermodynamic parameters of the metal complexes. The molecular geometry, Mulliken atomic charges of the studied compounds were investigated theoretically by performing density functional theory (DFT) to access reliable results to the experimental values. The theoretical (13)C chemical shift results of the studied compounds have been calculated at the B3LYP, PBEPBE and PW91PW91 methods and standard 6-311+G(d,p) basis set starting from optimized geometry. The comparison of the results indicates that B3LYP/6-311+G(d,p) yields good agreement with the observed chemical shifts. The measured low molar conductance values in DMF indicate that the metal complexes are non-electrolytes. The spectral and thermal analysis reveals that all complexes have octahedral geometry except Cu(II) complex which can attain the square planner arrangement. The presence of lattice and coordinated water molecules are indicated by thermograms of the complexes. The thermogravimetric (TG/DTG) analyses confirm high stability for all complexes followed by thermal decomposition in different steps.
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Affiliation(s)
- Hossein Pasha Ebrahimi
- Department of Biochemistry and National Magnetic Resonance Facility at Madison (NMRFAM), University of Wisconsin-Madison, Madison, WI 53706, USA
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Synthesis and characterization of binuclear Co(II) complexes with bis(salen-type) ligands. Inorganica Chim Acta 2013. [DOI: 10.1016/j.ica.2012.08.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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23
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Rigamonti L, Forni A, Pievo R, Reedijk J, Pasini A. Copper(II) compounds with NNO tridentate Schiff base ligands: Effect of subtle variations in ligands on complex formation, structures and magnetic properties. Inorganica Chim Acta 2012. [DOI: 10.1016/j.ica.2012.02.030] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Sadhukhan D, Ray A, Pilet G, Rosair GM, Garribba E, Nonat A, Charbonnière LJ, Mitra S. Cobalt(II), Manganese(IV) Mononuclear and Zinc(II) Symmetric Dinuclear Complexes of an Aliphatic Hydrazone Schiff Base Ligand with Diversity in Coordination Behaviors and Supramolecular Architectures: Syntheses, Structural Elucidations, and Spectroscopic Characterizations. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2011. [DOI: 10.1246/bcsj.20110004] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Sharma SK, May PS, Jones MB, Lense S, Hardcastle KI, MacBeth CE. Catalytic dioxygen activation by Co(ii) complexes employing a coordinatively versatile ligand scaffold. Chem Commun (Camb) 2011; 47:1827-9. [DOI: 10.1039/c0cc04671j] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Chu IK, Laskin J. Formation of peptide radical ions through dissociative electron transfer in ternary metal-ligand-peptide complexes. EUROPEAN JOURNAL OF MASS SPECTROMETRY (CHICHESTER, ENGLAND) 2011; 17:543-556. [PMID: 22274945 DOI: 10.1255/ejms.1156] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The formation and fragmentation of odd-electron ions of peptides and proteins is of interest to applications in biological mass spectrometry. Gas-phase redox chemistry occurring during collision-induced dissociation of ternary metal-ligand-peptide complexes enables the formation of a variety of peptide radicals, including the canonical radical cations, M(+•), radical dications, [M+H](2+•), radical anions, [M-2H](-•) and phosphorylated radical cations. In addition, odd-electron peptide ions with well-defined initial location of the radical site are produced through side-chain losses from the radical ions. Subsequent fragmentation of these species provides information regarding the role of charge and location of the radical site on the competition between radical-induced and proton-driven fragmentation of odd-electron peptide ions. This account summarizes current understanding of the factors that control the efficiency of the intramolecular electron transfer (ET) in ternary metal-ligand-peptide complexes resulting in formation of odd-electron peptide ions. Specifically, we discuss the effect of the metal center, the ligand and the peptide structure on the competition between the ET, proton transfer (PT) and loss of neutral peptide and neutral peptide fragments from the complex. Fundamental studies of the structures, stabilities and the energetics and dynamics of fragmentation of these complexes are also important for detailed molecular-level understanding of photosynthesis and respiration in biological systems.
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Affiliation(s)
- Ivan K Chu
- Department of Chemistry, The University of Hong Kong, Hong Kong, China.
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Chen LJ, Mei FM, Li GX, Xiang YJ. Activities of Co(II) Schiff base complexes in the redox carbonylation of aniline and nitrobenzene to methyl N-phenyl carbamate. KINETICS AND CATALYSIS 2010. [DOI: 10.1134/s0023158410050083] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Emara AA, Ali AM, Ragab EM, El-Asmy AA. Synthesis, characterization and oxygen affinity of Mn(II), Co(II) and Ni(II) complexes of diethylenetriamine Schiff bases. J COORD CHEM 2010. [DOI: 10.1080/00958970801993060] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Adel A. Emara
- a Faculty of Education, Department of Chemistry , Ain Shams University , Egypt
| | - A. M. Ali
- b Faculty of Science, Department of Chemistry , Al-Azhar University , Egypt
| | - E. M. Ragab
- c Faculty of Science, Department of Chemistry , Mansoura University , Egypt
| | - A. A. El-Asmy
- c Faculty of Science, Department of Chemistry , Mansoura University , Egypt
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Kobayashi M, Masaoka S, Sakai K. Syntheses, characterization, and photo-hydrogen-evolving properties of tris(2,2'-bipyridine)ruthenium(II) derivatives tethered to an H2-evolving (2-phenylpyridinato)platinum(II) unit. Molecules 2010; 15:4908-23. [PMID: 20657399 PMCID: PMC6257604 DOI: 10.3390/molecules15074908] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2010] [Revised: 07/01/2010] [Accepted: 07/14/2010] [Indexed: 11/16/2022] Open
Abstract
With the aim of developing new molecular devices having higher photo-hydrogen-evolving activity, Pt(ppy)ClX units (ppy = 2-phenylpyridinate, X = Cl- or DMSO; DMSO = dimethylsulfoxide) have been employed as an H2-evolving site, as the catalytic activity of [Pt(ppy)Cl2]- was confirmed to be higher than those of other mononuclear platinum(II) complexes. In the present study, two new heterodinuclear Ru(II)Pt(II) complexes, produced by condensation of [Ru(bpy)2(5-amino-phen)]2+ (bpy = 2,2'-bipyridine, phen = 1,10-phenanthroline) with [Pt(cppy)Cl2]- and Pt(cppy)(DMSO)Cl (cppy = 9-carboxy-phenylpyridinate), respectively, have been prepared and their photo-hydrogen-evolving activities have been evaluated in detail. The ineffectiveness of these systems as photo-hydrogen-evolving molecular devices are interpreted in terms of their negative driving forces for the photoinduced electron transfer from the triplet MLCT excited state of the Ru chromophore to the π*(ppy) orbital of the catalyst moiety.
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Affiliation(s)
| | | | - Ken Sakai
- Author to whom correspondence should be addressed; E-Mail:
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Arora H, Philouze C, Jarjayes O, Thomas F. CoII, NiII, CuII and ZnII complexes of a bipyridine bis-phenol conjugate: Generation and properties of coordinated radical species. Dalton Trans 2010; 39:10088-98. [DOI: 10.1039/c0dt00342e] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Kleij AW. Nonsymmetrical Salen Ligands and Their Complexes: Synthesis and Applications. Eur J Inorg Chem 2008. [DOI: 10.1002/ejic.200800936] [Citation(s) in RCA: 131] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Arjan W. Kleij
- Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona, Spain, Fax: +34‐977‐920‐224
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Pg. LLuís Companys 23, 08010 Barcelona, Spain
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Oxidative carbonylation of aniline to N,N′-diphenyl urea catalyzed by cobalt(II)–Schiff base complex/pyridine catalytic system. CATAL COMMUN 2008. [DOI: 10.1016/j.catcom.2007.07.016] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Del Piero S, Di Bernardo P, Fedele R, Melchior A, Polese P, Tolazzi M. Affinity of Polypyridines Towards CdII and CoII Ions: a Thermodynamic and DFT Study. Eur J Inorg Chem 2006. [DOI: 10.1002/ejic.200600435] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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