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Ali AE, Elasala GS, Ibrahim RS. Synthesis, characterization, spectral, thermal analysis and biological activity studies of metronidazole complexes. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2018.08.095] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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2
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Daravath S, Vamsikrishna N, Ganji N, Venkateswarlu K, Shivaraj. Synthesis, characterization, DNA binding ability, nuclease efficacy and biological evaluation studies of Co(II), Ni(II) and Cu(II) complexes with benzothiazole Schiff base. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.cdc.2018.08.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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3
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Castaldelli E, Imalka Jayawardena KDG, Cox DC, Clarkson GJ, Walton RI, Le-Quang L, Chauvin J, Silva SRP, Demets GJF. Electrical semiconduction modulated by light in a cobalt and naphthalene diimide metal-organic framework. Nat Commun 2017; 8:2139. [PMID: 29247248 PMCID: PMC5732256 DOI: 10.1038/s41467-017-02215-7] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Accepted: 11/14/2017] [Indexed: 12/02/2022] Open
Abstract
Metal-organic frameworks (MOFs) have emerged as an exciting class of porous materials that can be structurally designed by choosing particular components according to desired applications. Despite the wide interest in and many potential applications of MOFs, such as in gas storage, catalysis, sensing and drug delivery, electrical semiconductivity and its control is still rare. The use and fabrication of electronic devices with MOF-based components has not been widely explored, despite significant progress of these components made in recent years. Here we report the synthesis and properties of a new highly crystalline, electrochemically active, cobalt and naphthalene diimide-based MOF that is an efficient electrical semiconductor and has a broad absorption spectrum, from 300 to 2500 nm. Its semiconductivity was determined by direct voltage bias using a four-point device, and it features a wavelength dependant photoconductive-photoresistive dual behaviour, with a very high responsivity of 2.5 × 105 A W-1.
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Affiliation(s)
- Evandro Castaldelli
- Departamento de Química, FFCLRP, Universidade de São Paulo, Av. Bandeirantes 3900, Ribeirão Preto, SP, 14040-901, Brazil.
- Advanced Technology Institute, University of Surrey, Guildford, Surrey, GU2 7XH, UK.
| | | | - David C Cox
- Advanced Technology Institute, University of Surrey, Guildford, Surrey, GU2 7XH, UK
| | - Guy J Clarkson
- Department of Chemistry, University of Warwick, Coventry, CV4 7AL, UK
| | - Richard I Walton
- Department of Chemistry, University of Warwick, Coventry, CV4 7AL, UK
| | - Long Le-Quang
- CIRE/DCM Université de Grenoble Alpes, CS 40700, Grenoble Cedex 9,, 38058, France
| | - Jerôme Chauvin
- CIRE/DCM Université de Grenoble Alpes, CS 40700, Grenoble Cedex 9,, 38058, France
| | - S Ravi P Silva
- Advanced Technology Institute, University of Surrey, Guildford, Surrey, GU2 7XH, UK.
| | - Grégoire Jean-François Demets
- Departamento de Química, FFCLRP, Universidade de São Paulo, Av. Bandeirantes 3900, Ribeirão Preto, SP, 14040-901, Brazil.
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Pradeep Kumar M, Vamsikrishna N, Ramesh G, Subhashini NJP, Nanubolu JB, Shivaraj. Cu(II) complexes with 4-amino-3,5-dimethyl isoxazole and substituted aromatic aldehyde Schiff bases: synthesis, crystal structure, antimicrobial activity, DNA binding and cleavage studies. J COORD CHEM 2017. [DOI: 10.1080/00958972.2017.1292503] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
| | | | - Gali Ramesh
- Department of Chemistry, Osmania University, Hyderabad, India
| | - N. J. P. Subhashini
- Department of Chemistry, University College of Technology, Osmania University, Hyderabad, India
| | - Jagadeesh Babu Nanubolu
- Department of Centre for X-ray Crystallography, Indian Institute of Chemical Technology, Hyderabad, India
| | - Shivaraj
- Department of Chemistry, Osmania University, Hyderabad, India
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El-Shahawi MS, Ahmad W, Mohammed GI, Moustafa YM, Al-Hazmi GA, El-Asmy AA. Impact and correlation of pKaand dnelectrons of some selected thiosemicarbazone Schiff base metal Co, Ni, Cu complexes: a study of electrochemical behavior, excitation and optical energies. NEW J CHEM 2017. [DOI: 10.1039/c7nj00073a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The electron-transfer and coordination mechanism of thiosemicarbazone Schiff bases with metal ions (Co, Ni, Cu), correlation of the electrochemical and optical properties for their potential applications in various fields of chemistry and biochemistry are underexplored.
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Affiliation(s)
- M. S. El-Shahawi
- Department of Chemistry
- Faculty of Science
- King Abdulaziz University
- Jeddah 21589
- Saudi Arabia
| | - W. Ahmad
- Department of Chemistry
- Faculty of Science
- King Abdulaziz University
- Jeddah 21589
- Saudi Arabia
| | - G. I. Mohammed
- Faculty of Applied Science
- Umm Al-Qura University
- Makkah 21955
- Saudi Arabia
| | - Y. M. Moustafa
- Faculty of Applied Science
- Umm Al-Qura University
- Makkah 21955
- Saudi Arabia
| | - G. A. Al-Hazmi
- Department of Chemistry
- Faculty of Science
- King Khaled University
- Abha
- Saudi Arabia
| | - A. A. El-Asmy
- Department of Chemistry
- Faculty of Science
- Kuwait University
- Kuwait
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Bharati P, Bharti A, Bharty M, Singh N, Kashyap S, Singh UP, Butcher R. Cu(II), Zn(II) and Mn(II) complexes of NNS tridentate and Pd(II) complex of NN(μ-S) tetradentate thiobenzyl esters: Synthesis, spectral and X-ray characterization. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.05.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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7
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Sundararajan ML, Jeyakumar T, Anandakumaran J, Karpanai Selvan B. Synthesis of metal complexes involving Schiff base ligand with methylenedioxy moiety: spectral, thermal, XRD and antimicrobial studies. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 131:82-93. [PMID: 24820326 DOI: 10.1016/j.saa.2014.04.055] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2014] [Revised: 04/02/2014] [Accepted: 04/07/2014] [Indexed: 06/03/2023]
Abstract
Metal complexes of Zn(II), Cd(II), Ni(II), Cu(II), Fe(III), Co(II), Mn(II) Hg(II), and Ag(I) have been synthesized from Schiff base ligand, prepared by the condensation of 3,4-(methylenedioxy)aniline and 5-bromo salicylaldehyde. All the compounds have been characterized by using elemental analysis, molar conductance, FT-IR, UV-Vis, (1)H NMR, (13)C NMR, mass spectra, powder XRD and thermal analysis (TG/DTA) technique. The elemental analysis suggests the stoichiometry to be 1:1 (metal:ligand). The FT-IR, (1)H NMR, (13)C NMR and UV-Vis spectral data suggest that the ligand coordinate to the metal atom by imino nitrogen and phenolic oxygen as bidentate manner. Mass spectral data further support the molecular mass of the compounds and their structure. Powder XRD indicates the crystalline state and morphology of the ligand and its metal complexes. The thermal behaviors of the complexes prove the presence of lattice as well as coordinated water molecules in the complexes. Melting point supports the thermal stability of all the compounds. The in vitro antimicrobial effects of the synthesized compounds were tested against five bacterial and three fungal species by well diffusion method. Antioxidant activities have also been performed for all the compounds. Metal complexes show more biological activity than the Schiff base.
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Affiliation(s)
- M L Sundararajan
- Chemistry Section, Faculty of Engineering and Technology, Annamalai University, Annamalai Nagar 608002, Tamil Nadu, India
| | - T Jeyakumar
- Chemistry Section, Faculty of Engineering and Technology, Annamalai University, Annamalai Nagar 608002, Tamil Nadu, India.
| | - J Anandakumaran
- Chemistry Section, Faculty of Engineering and Technology, Annamalai University, Annamalai Nagar 608002, Tamil Nadu, India
| | - B Karpanai Selvan
- Department of Biotechnology, Anna University, Trichy 620024, Tamil Nadu, India
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8
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Syntheses, crystal structures and spectroscopic characterization of two new octahedral nickel(II) complexes of a Schiff base ligand derived from pyridoxal and 2-(pyrid-2-yl)ethylamine. J Mol Struct 2014. [DOI: 10.1016/j.molstruc.2014.06.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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9
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Chandrasekar T, Pravin N, Raman N. Biosensitive metal chelates from curcumin analogues: DNA unwinding and anti-microbial evaluation. INORG CHEM COMMUN 2014. [DOI: 10.1016/j.inoche.2014.02.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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10
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Rani S, Kumar S, Chandra S. Spectroscopic and biological approach in the characterization of a novel 14-membered [N4] macrocyclic ligand and its palladium(II), platinum(II), ruthenium(III) and iridium(III) complexes. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 118:244-250. [PMID: 24051297 DOI: 10.1016/j.saa.2013.08.079] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2013] [Revised: 07/31/2013] [Accepted: 08/15/2013] [Indexed: 06/02/2023]
Abstract
A novel, tetradentate nitrogen donor [N4] macrocyclic ligand, i.e. 3,5,14,16-tetramethyl-2,6,13,17-tetraazatricyclo[12,0,0(7-12)] cosa-1(22),2,5,7,9,11,13,16,18,20-decaene(L), has been synthesized and characterized by elemental analyses, IR, Mass, and (1)H NMR spectral studies. Complexes of Pd(II), Pt(II), Ru(III) and Ir(III) have been prepared and characterized by elemental analyses, molar conductance measurements, magnetic susceptibility measurements, IR, Mass, electronic spectral and thermal studies. On the basis of molar conductance the complexes may be formulated as [PdL]Cl2, [PtL]Cl2, [Ru(L)Cl2]Cl and [Ir(L)Cl2]Cl. The complexes are insoluble in most common solvents, including water, ethanol, carbon tetrachloride and acetonitrile, but soluble in DMF/DMSO. The value of magnetic moment indicates that all the complexes are diamagnetic except Ru(III) complex which shows magnetic moment corresponding to one unpaired electron. The magnetic moment of Ru(III) complex is 1.73 B.M. at room temperature. The antimicrobial activities of ligand and its complexes have been screened in vitro, as growth inhibiting agents. The antifungal and antibacterial screening were carried out using Food Poison and Disc Diffusion Method against plant pathogenic fungi and bacteria Alternaria porri, Fusarium oxysporum, Xanthomonas compestris and Pseudomonas aeruginosa respectively. The compounds were dissolved in DMSO to get the required solutions. The required medium used for these activities was PDA and nutrient agar.
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Affiliation(s)
- Soni Rani
- Department of Chemistry, Zakir Husain College (University of Delhi), J.L. Nehru Marg, New Delhi 110002, India.
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11
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Photoelectrochemical properties of electrostatically self-assembled multilayer films formed by a cobalt complex and graphene oxide. J Colloid Interface Sci 2013; 402:107-13. [DOI: 10.1016/j.jcis.2013.03.044] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Revised: 03/25/2013] [Accepted: 03/27/2013] [Indexed: 11/18/2022]
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12
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Nemati Kharat A, Bakhoda A, Tamaddoni Jahromi B. Green and chemoselective oxidation of alcohols with hydrogen peroxide: A comparative study on Co(II) and Co(III) activity toward oxidation of alcohols. Polyhedron 2011. [DOI: 10.1016/j.poly.2011.07.030] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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13
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Saif M, Mashaly MM, Eid MF, Fouad R. Synthesis and thermal studies of tetraaza macrocylic ligand and its transition metal complexes. DNA binding affinity of copper complex. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 79:1849-1855. [PMID: 21684198 DOI: 10.1016/j.saa.2011.05.071] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2011] [Revised: 05/13/2011] [Accepted: 05/24/2011] [Indexed: 05/30/2023]
Abstract
A Tetraaza Macrocylic Ligand (H2L) and its complexes, [Cd(H2L)(OH2)2](NO3)(2)·1/2OH2 (I), [Co(H2L)(OH2)](NO3)(2)·1/2OH2 (II), [Cu(H2L)(NO3)2]·3/2OH2 (III) and [Ni(H2L)(NO3)(OH2)]NO3·OH2 (IV), have been synthesized and characterized on the basis of elemental analysis, molar conductivity, 1H NMR, UV-vis, FT-IR and mass spectroscopy. All results confirm that the prepared compounds have 1:1 metal-to-ligand stoichiometry, octahedral configuration and the ligand behaves as a neutral tetradendate towards the metal ions. [CdL(OH2)2] (V), [CoL(OH2)2] (VI), [CuL(OH2)2] (VII) and [Ni(H2L)(NO3)2] (VIII) were synthesized pyrolytically in solid state from corresponding compounds (I-IV). Analytical results of complexes (V-VIII) show that the ligand behaves either as a neutral tetradendate or dianionic tetradentate ligand towards the metal ions. The binding of H2L and its copper complex (III) to DNA has been investigated by ultraviolet absorption spectroscopy. The experiments indicate that H2L and its copper complex (III) can bind to DNA through an intercalative mode. The H2L and its copper complex (III) exhibited anti-tumor activity against Ehrlich Acites Carcinoma (E.A.C) at the concentration of 100 μg/ml.
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Affiliation(s)
- M Saif
- Department of Chemistry, Faculty of Education, Ain Shams University, Roxy 11711, Cairo, Egypt.
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14
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Affiliation(s)
- Manju
- a Department of Chemistry , Banasthali University , Banasthali, Rajasthan – 304022, India
| | - D. Kishore
- a Department of Chemistry , Banasthali University , Banasthali, Rajasthan – 304022, India
| | - Dinesh Kumar
- a Department of Chemistry , Banasthali University , Banasthali, Rajasthan – 304022, India
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Singh N, Tripathi P, Bharty M, Srivastava A, Singh S, Butcher R. Ni(II) and Mn(II) complexes of NNS tridentate ligand N′-[(2-methoxyphenyl)carbonothioyl]pyridine-2-carbohydrazide (H2mcph): Synthesis, spectral and structural characterization. Polyhedron 2010. [DOI: 10.1016/j.poly.2010.03.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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16
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Lalia-Kantouri M, Papadopoulos C, Hatzidimitriou A, Bakas T, Pachini S. A Trinuclear Iron(III) Complex Containing the Semi-Cubane [Fe3(μ3-O)]7+Core: Structural, Spectroscopic, Magnetic and Electrochemical Study. Z Anorg Allg Chem 2010. [DOI: 10.1002/zaac.200900292] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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17
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Template Synthesis and Characterization of Host (Nanocavity of Zeolite Y)-Guest ([Cu([18]aneN 4S 2)] 2+, [Cu([20]aneN 4S 2)] 2+, [Cu(Bzo 2[18]aneN 4S 2)] 2+, [Cu(Bzo 2[20]aneN 4S 2)] 2+) Nanocomposite Materials. B KOREAN CHEM SOC 2009. [DOI: 10.5012/bkcs.2009.30.2.348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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18
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Gupta LK, Chandra S. Spectroscopy: the study of DNA cleavage by newly synthesized polydentate macrocyclic ligand and its copper(II) complexes. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2008; 71:496-501. [PMID: 18495526 DOI: 10.1016/j.saa.2007.12.034] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2007] [Accepted: 12/18/2007] [Indexed: 05/26/2023]
Abstract
A novel hexadentate nitrogen donor [N6] macrocyclic ligand, i.e. 2,6,12,16,21,22-hexaaza-3,5,13,15-tetramethyl-4,14-diethyl-tricyclo-[15.3.1.1(7-11)]docosane-1(21),2,5,7(22),8,10,12,15,17,19-decaene (L), has been synthesized. Copper(II) complexes with this ligand have been prepared and subjected to elemental analyses, molar conductance measurements, magnetic susceptibility measurements, mass, 1H NMR (ligand), IR, electronic, and EPR spectral studies. On the basis of molar conductance the complexes may be formulated as [Cu(L)X2] [X = Cl(-), Br(-), NO3(-) and CH3COO(-)] due to their nonelectrolytic nature in N,N'-dimethylformamide (DMF). All the complexes are of the high spin type and are six coordinated. On the basis of IR, electronic and EPR spectral studies tetragonal geometry has been assigned to the Cu(II) complexes. The interaction of these complexes with calf thymus DNA has been explored by using absorption, emission, viscosity measurements, electrochemical studies and DNA cleavage. All the experimental results suggest that the complexes bind to DNA and also promote the cleavage plasmid pBR 322, in the presence of H2O2 and ascorbic acid.
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Affiliation(s)
- Lokesh Kumar Gupta
- Department of Chemistry, Zakir Husain College, University of Delhi, JLN-Marg, New Delhi 110002, India.
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Zinc(II) complexes derived from di-2-pyridyl ketone N4-phenyl-3-semicarbazone: Crystal structures and spectral studies. Polyhedron 2008. [DOI: 10.1016/j.poly.2008.08.014] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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20
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Chandra S, Pundir M. Spectroscopic characterization of chromium(III), manganese(II) and nickel(II) complexes with a nitrogen donor tetradentate, 12-membered azamacrocyclic ligand. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2008; 69:1-7. [PMID: 17482510 DOI: 10.1016/j.saa.2007.02.019] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2006] [Revised: 01/24/2007] [Accepted: 02/22/2007] [Indexed: 05/15/2023]
Abstract
The complexes of Cr(III), Mn(II) and Ni(II) were synthesized with macrocyclic ligand i.e. 5,11-dimethyl-6,12-diethyl-dione-1,2,4,7,9,10-hexazacyclododeca -1,4,6,10-tetraene. The ligand (L) was prepared by [2+2] condensation reaction of 2,3-pentanedione and semicarbazide hydrochloride. These complexes were found to have the general composition [Cr(L)X(2)]X and [M(L)X(2)] (where M=Mn(II) and Ni(II); X=Cl(-), NO(3)(-), (1/2)SO(4)(2-), NCS(-) and L=ligand [N(6)]). The ligand and its transition metal complexes were characterized by the elemental analysis, molar conductance, magnetic susceptibility, mass, IR, electronic and EPR spectral studies. On the basis of IR, electronic and EPR spectral studies, an octahedral geometry has been assigned for these complexes except sulphato complexes which are of five coordinated geometry.
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Affiliation(s)
- Sulekh Chandra
- Department of Chemistry, Zakir Husain College, University of Delhi, J.L. Nehru Marg, New Delhi 110002, India.
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Ghaemy M, Behmadi H, Barghamadi M. Study of cure kinetics of diglycidyl ether of bisphenol A with Ni(II) and Cu(II) complexes of benzil bisthiosemicarbazone. J Appl Polym Sci 2007. [DOI: 10.1002/app.26902] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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22
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Gupta LK, Chandra S. The Spectroscopy: a modern technology in the characterization of novel macrocyclic ligand and its homo-bi-nuclear cobalt (II) complexes. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2007; 68:839-44. [PMID: 17337238 DOI: 10.1016/j.saa.2006.12.068] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2006] [Accepted: 12/16/2006] [Indexed: 05/14/2023]
Abstract
A novel hexadentate nitrogen-sulphur donor [N(4)S(2)] macrocyclic ligand, i.e. 3,13-dithio-6,10,16,20-tetraoxo-8,18-dithia-1,2,4,5,11,12,14,15-octaazacyclocosane (L), has been synthesized. Cobalt (II) complexes of this ligand have been prepared and subjected to elemental analyses, molar conductance measurements, magnetic moment susceptibility measurements, mass, (1)H NMR (Ligand), IR, electronic, and EPR spectral studies. On the basis of molar conductance, complexes may be formulated as [Co(2)(L)X(2)]X(2) [where X=Cl(-), Br(-), NO(3)(-) and NCS(-)] due to their 1:2 electrolytic nature in dimethylformamide (DMF). All the complexes are of the high spin type and are four coordinated. On the basis of IR, electronic and EPR spectral studies tetrahedral geometry has been assigned to all the complexes. The antimicrobial activities of the ligand and its complexes, as growth inhibiting agents, have been screened in vitro against several species of bacteria and plant pathogenic fungi.
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Affiliation(s)
- Lokesh Kumar Gupta
- Department of Chemistry, Zakir Husain College, University of Delhi, JLN-Marg, New Delhi, India
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Khan S, Nami SAA, Siddiqi KS. Synthesis, spectroscopic and thermal studies of transition metal complexes derived from benzil and diethylenetriamine. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2007; 68:269-74. [PMID: 17368084 DOI: 10.1016/j.saa.2006.11.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2006] [Revised: 11/17/2006] [Accepted: 11/18/2006] [Indexed: 05/14/2023]
Abstract
A macrocyclic ligand, bdta (where bdta=3,6,9,12,15,18-hexaaza-1,2,10,11-tetraphenyl-2,9,11,18-tetraenecyclododecane) has been prepared by cyclocondensation of benzil with diethylenetriamine which efficiently encapsulates transition as well as pseudo-transition metal ions leading to the formation of M(bdta)Cl2 type complexes [where M=Mn(II), Fe(II), Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and Hg(II)]. The analytical, spectroscopic and magnetic moment data suggests an octahedral geometry for all the complexes. EPR spectra of Mn(II) and Cu(II) show considerable exchange interaction in the complex. They are non-conducting in DMSO. The TGA profile of the ligand and its complexes are identical and consists of two discreet stages. The voltammogram of Cu-complex exhibits a quasi-reversible one-electron transfer wave for Cu(II)/Cu(I) couple.
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Affiliation(s)
- Sadaf Khan
- Department of Chemistry, Aligarh Muslim University, Aligarh 202002, India
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Chandra S, Gupta LK, Agrawal S. Synthesis spectroscopic and biological approach in the characterization of novel [N4] macrocyclic ligand and its transition metal complexes. TRANSIT METAL CHEM 2007. [DOI: 10.1007/s11243-007-0201-y] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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25
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Chandra S, Gupta LK, Agrawal S. Modern spectroscopic and biological approach in the characterization of a novel 14-membered [N4] macrocyclic ligand and its transition metal complexes. TRANSIT METAL CHEM 2007. [DOI: 10.1007/s11243-006-0155-5] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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26
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Ghaemy M, Behmadi H. Structure and metal type effects on cure kinetics of DGEBA with benzil bisthiosemicarbazone complexes. J Appl Polym Sci 2007. [DOI: 10.1002/app.27620] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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27
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Maurya MR, Kumar A, Abid M, Azam A. Dioxovanadium(V) and μ-oxo bis[oxovanadium(V)] complexes containing thiosemicarbazone based ONS donor set and their antiamoebic activity. Inorganica Chim Acta 2006. [DOI: 10.1016/j.ica.2006.02.032] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Philip V, Suni V, Kurup MRP, Nethaji M. Manganese(II) complexes of substituted di-2-pyridyl ketone thiosemicarbazones: structural and spectral studies. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2006; 64:171-7. [PMID: 16098800 DOI: 10.1016/j.saa.2005.07.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2005] [Accepted: 07/04/2005] [Indexed: 05/04/2023]
Abstract
The reaction between manganese(II) acetate and two substituted thiosemicarbazones derived from di-2-pyridyl ketone (HL) in 1:2 molar ratio produces new complexes of general formula [MnL2]. The thiosemicarbazone moiety in HL deprotonates and gets coordinated to Mn(II) through the azomethine nitrogen, one of the pyridyl nitrogens, and the thiolate sulfur in both the complexes. The crystal structure of [MnL2(1)] was established by single crystal X-ray diffraction and the compound crystallizes into a monoclinic lattice with P2(1)/c space group. Manganese(II) exists in a distorted octahedral geometry in the complexes.
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Affiliation(s)
- Varughese Philip
- Department of Applied Chemistry, Cochin University of Science and Technology, Kochi 682 022, Kerala, India
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Sreekanth A, Joseph M, Fun HK, Kurup MP. Formation of manganese(II) complexes of substituted thiosemicarbazones derived from 2-benzoylpyridine: Structural and spectroscopic studies. Polyhedron 2006. [DOI: 10.1016/j.poly.2005.10.004] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Chandra S, Gupta LK. Spectroscopic, cyclic voltammetric and biological studies of transition metal complexes with mixed nitrogen-sulphur (NS) donor macrocyclic ligand derived from thiosemicarbazide. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2005; 62:453-60. [PMID: 16174565 DOI: 10.1016/j.saa.2005.01.015] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2004] [Revised: 01/24/2005] [Accepted: 01/24/2005] [Indexed: 05/04/2023]
Abstract
The complexation of new mixed thia-aza-oxa macrocycle viz., 2,12-dithio-5,9,14,18-tetraoxo-7,16-dithia-1,3,4,10,11,13-hexaazacyclooctadecane containing thiosemicarba-zone unit with a series of transition metals Co(II), Ni(II) and Cu(II) has been investigated, by different spectroscopic techniques. The structural features of the ligand have been studied by EI-mass, (1)H NMR and IR spectral techniques. Elemental analyses, magnetic moment susceptibility, molar conductance, IR, electronic, and EPR spectral studies characterized the complexes. Electronic absorption and IR spectra of the complexes indicate octahedral geometry for chloro, nitrato, thiocyanato or acetato complexes. The dimeric and neutral nature of the sulphato complexes are confirmed from magnetic susceptibility and low conductance values. Electronic spectra suggests square-planar geometry for all sulphato complexes. The redox behaviour was studied by cyclic voltammetry, show metal-centered reduction processes for all complexes. The complexes of copper show both oxidation and reduction process. The redox potentials depend on the conformation of central atom in the macrocyclic complexes. Newly synthesized macrocyclic ligand and its transition metal complexes show markedly growth inhibitory activity against pathogenic bacterias and plant pathogenic fungi under study. Most of the complexes have higher activity than that of the metal free ligand.
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Affiliation(s)
- Sulekh Chandra
- Department of Chemistry, Zakir Husain College, University of Delhi, J.L. Nehru Marg, New Delhi 110002, India.
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Sharma S, Athar F, Maurya MR, Naqvi F, Azam A. Novel bidentate complexes of Cu(II) derived from 5-nitrofuran-2-carboxaldehyde thiosemicarbazones with antiamoebic activity against E. histolytica. Eur J Med Chem 2005; 40:557-62. [PMID: 15922839 DOI: 10.1016/j.ejmech.2005.01.003] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2005] [Accepted: 01/11/2005] [Indexed: 10/25/2022]
Abstract
The novel analogues of 5-nitrofuran-2-carboxaldehyde thiosemicarbazones 1-10 were synthesized and their copper(II) complexes 1a-10a were obtained by means of coordination with cupric chloride. All these compounds have been characterized by elemental analysis, IR, electronic spectra and thermogravimetric patterns while ligands have also been characterized by 1H NMR spectral studies. These copper complexes are bidentate and possess octahedral geometry around Cu(II) ion. Their antiamoebic activities were carried out to ascertain their effectiveness in comparison to their corresponding thiosemicarbazones. A number of these complexes possess noteworthy potencies towards HK-9 strain of Entamoeba histolytica in vitro. The complexes 2a-7a, 9a and 10a showed less IC50 value than metronidazole, the drug of choice for amoebiasis. Moreover, complexes 2a and 9a have shown the most promising antiamoebic activities (IC50 = 0.38 microM of 2a and IC50 = 0.34 microM of 9a versus IC50 = 1.81 microM of metronidazole). These results indicate that the metallated thiosemicarbazone may be lead molecule to inhibit growth of E. histolytica.
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Affiliation(s)
- Sangita Sharma
- Department of Chemistry, Jamia Millia Islamia, Jamia Nagar, New Delhi 110025, India
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Colilla M, Mendiola M, Procopio J, Sevilla M. Application of a Carbon Paste Electrode Modified with a Schiff Base Ligand to Mercury Speciation in Water. ELECTROANAL 2005. [DOI: 10.1002/elan.200403198] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Metal complexes with Schiff-base ligands - pyridoxal and semicarbazide-based derivatives. JOURNAL OF THE SERBIAN CHEMICAL SOCIETY 2005. [DOI: 10.2298/jsc0503393l] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The most important results of extensive studies (syntheses, spectral, magnetic, voltammetric and structural characteristics and biological activity) of metal complexes with pyridoxal semi-, thiosemi- and isothiosemicarbazones are reviewed.
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Chandra S, Sangeetika, Thakur S. Electronic, e.p.r., cyclic voltammetric and biological activities of copper(II) complexes with macrocyclic ligands. TRANSIT METAL CHEM 2004. [DOI: 10.1007/s11243-004-3224-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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35
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López-Torres E, Mendiola MA, Pastor CJ, Pérez BS. Versatile Chelating Behavior of Benzil Bis(thiosemicarbazone) in Zinc, Cadmium, and Nickel Complexes. Inorg Chem 2004; 43:5222-30. [PMID: 15310198 DOI: 10.1021/ic035461a] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Reactions of benzil bis(thiosemicarbazone), LH(6), with M(NO(3))(2).nH(2)O (M = Zn, Cd, and Ni), in the presence of LiOH.H(2)O, show the versatile behavior of this molecule. The structure of the ligand, with the thiosemicarbazone moieties on opposite sides of the carbon backbone, changes to form complexes by acting as a chelating molecule. Complexes of these metal ions with empirical formula [MLH(4)] were obtained, although they show different molecular structures depending on their coordinating preferences. The zinc complex is the first example of a crystalline coordination polymer in which a bis(thiosemicarbazone) acts as bridging ligand, through a nitrogen atom, giving a 1D polymeric structure. The coordination sphere is formed by the imine nitrogen and sulfur atoms, and the remaining position, in a square-based pyramid, is occupied by an amine group of another ligand. The cadmium derivative shows the same geometry around the metal ion but consists of a dinuclear structure with sulfur atoms acting as a bridge between the metal ions. However, in the nickel complex LH(6) acts as a N(2)S(2) ligand yielding a planar structure for the nickel atom. The ligand and its complexes have been characterized by X-ray crystallography, microanalysis, mass spectrometry, IR, (1)H, and (13)C NMR spectroscopies and for the cadmium complex by (113)Cd NMR in solution and in the solid state.
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Affiliation(s)
- Elena López-Torres
- Departamento de Química Inorgánica, Universidad Autónoma, Madrid-28049, Spain
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36
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Akbar Ali M, Mirza A, Voo C, Tan AL, Bernhardt P. The preparation of zinc(II) and cadmium(II) complexes of the pentadentate N3S2 ligand formed from 2,6-diacetylpyridine and S-benzyldithiocarbazate (H2SNNNS) and the X-ray crystal structure of the novel dimeric [Zn2(SNNNS)2] complex. Polyhedron 2003. [DOI: 10.1016/j.poly.2003.08.004] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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37
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López-Torres E, Mendiola M, Pastor C, Procopio J. Diorganotin(IV) Complexes of a Cyclic Thiosemicarbazone Ligand: Crystal Structures of [SnPh2(C15H10N3S)Cl] and [SnMe2(C15H10N3S)2]. Eur J Inorg Chem 2003. [DOI: 10.1002/ejic.200300090] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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38
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Blanco M, López-Torres E, Mendiola M, Brunet E, Sevilla M. Macrocyclization of cyclic thiosemicarbazones with mercury salts. Tetrahedron 2002. [DOI: 10.1016/s0040-4020(02)00016-9] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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39
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López-Torres E, Mendiola MA, Rodrı́guez-Procopio J, Sevilla MT, Colacio E, Ma Moreno J, Sobrados I. Synthesis and characterisation of zinc, cadmium and mercury complexes of benzilbisthiosemicarbazone. Structure of cadmium derivative. Inorganica Chim Acta 2001. [DOI: 10.1016/s0020-1693(01)00607-7] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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