Synthesis, electrochemical, catalytic and antimicrobial activities of novel unsymmetrical macrocyclic dicompartmental binuclear nickel(II) complexes

Sreedaran, S.; Bharathi, K. Shanmuga; Rahiman, A. Kalilur; Rajesh, K.; Nirmala, G.; Jagadish, L.; Kaviyarasan, V.; Narayanan, V.

doi:10.1016/j.poly.2008.02.022

Cited by 56 publications

(28 citation statements)

References 64 publications

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“…Also they have been used as antibacterial, antifungal, anticancer, antitubercular, hypertensive, and hypothermic reagents [5,6]. Tetrameric HCN (diaminomaleonitrile, DAMN), a diamine, is one of the most versatile reagents in organic chemistry, used as a precursor for producing nucleotides and for synthesizing a wide variety of heterocyclic compounds [7,8].…”

Section: Introductionmentioning

confidence: 99%

Studies on Synthesis and Spectral Characterization of Some Transition Metal Complexes of Azo-Azomethine Derivative of Diaminomaleonitrile

Anitha¹,

Sheela

Tharmaraj

et al. 2013

International Journal of Inorganic Chemistry

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New complexes of 2,3-bis(5-(4-chlorophenyl)diazenyl)-2-hydroxybenzylideneamino)maleonitrile (CDHBDMN) with VO(II), Mn(II), Co(II), Ni(II), Cu(II), and Zn(II) were synthesized and characterized by analytical and physicochemical techniques, that is, elemental analyses, molar conductivity, UV, IR, EPR, 1 H-NMR spectra, magnetic susceptibility and also by aid of scanning electron microscopy (SEM), nonlinear optical study (NLO), �uorescence spectral studies, and solvatochromic behaviors. Electronic and magnetic susceptibility measurements of the complexes indicate square pyramidal geometry for VO(II), octahedral for Ni(II), and square planar geometry for all the other complexes. e EPR spectral data provide information about their structures on the basis of Hamiltonian parameters and the degree of covalency. ese metal complexes were also tested for their antibacterial and antifungal activities to assess their inhibiting potential. Metal-mediated �uorescence enhancement is observed on complexation of the azo Schiff base ligand. e synthesized compounds were investigated for nonlinear optical properties, and the surface morphology of the Cu(II) complex was studied by scanning electron microscopy.

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Section: Introductionmentioning

confidence: 99%

Studies on Synthesis and Spectral Characterization of Some Transition Metal Complexes of Azo-Azomethine Derivative of Diaminomaleonitrile

Anitha¹,

Sheela

Tharmaraj

et al. 2013

International Journal of Inorganic Chemistry

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“…The absence of a peak around 3,400 cm -1 in all the complexes indicate the absence of phenolic m(OH) due to deprotonation followed by complexation [25]. The FTIR spectra of H 2 L 1 -H 2 L 4 show a sharp band in the region 1,610-1,643 cm -1 due to the m(C=N) group [26,27]. The FTIR spectra of the copper(II) complexes of all the ligands show bands in the region 3,285-3,335 cm -1 , assigned to m(NH) groups.…”

Section: Resultsmentioning

confidence: 89%

“…Apart from this an additional peak in the range of 624-630 cm -1 is assigned to a perchlorate bending vibration. Further, bands in the region of 1,530-1,558 cm -1 in all the complexes suggest phenoxide bridging with the metal atoms [26,27]. Electronic spectra of the complexes were obtained in DMF.…”

Section: Resultsmentioning

confidence: 95%

N-functionalized cyclam based trinuclear copper(II) complexes: electrochemical, magnetic, catalytic and antimicrobial studies

Sreedaran

Bharathi

Rahiman

et al. 2008

Transition Met Chem

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A series of trinuclear Cu(II) complexes have been prepared by Schiff base condensation of 1,8-[bis-(3-formyl-2-hydroxy-5-methyl)benzyl]-l,4,8,11-tetraazacyclotetradecane and 1,8-[bis(3-formyl-2-hydroxy-5-bromo)-benzyl]-l,4,8,11-tetraazacyclotetradecane with aromatic and aliphatic diamines, Cu(II) perchlorate and triethylamine. The complexes were characterized by elemental and spectroscopic analysis. Electrochemical studies of the complexes in DMF solution show three irreversible one-electron reduction processes around E pc 1 = -0.73 to -0.98 V, E pc 2 = -0.91 to -1.20 V and E pc 3 = -1.21 to -1.33 V. ESR spectra and magnetic moments of the trinuclear Cu(II) complexes show the presence of antiferromagnetic coupling. The rate constants for hydrolysis of 4-nitrophenylphosphate by the Cu(II) complexes are in the range of 3.33 9 10 -2 to 7.58 9 10 -2 min -1 . The rate constants for the catecholase activity of the complexes fall in the range of 2.67 9 10 -2 to 7.56 9 10 -2 min -1 . All the complexes were screened for antifungal and antibacterial activity.

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“…increasing in the chain length enhances the rate constant of hydrolysis fairly well by producing distortion in the geometry around the metal ion that enhances the accessibility of the metal ion for the bonding of phosphate and OH groups. [26][27][28] The rate constant value for the mononuclear gadolinium complexes was found to be increasing in the following order:…”

Section: Fluorescent Properties Of Complexesmentioning

confidence: 99%

Spectral, Electrochemical, Fluorescence, Kinetic and Anti-microbial Studies of Acyclic Schiff-base Gadolinium(III) Complexes

Vijayaraj¹,

Prabu²,

Suresh³

et al. 2012

Bulletin of the Korean Chemical Society

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A new series of acyclic mononuclear gadolinium(III) complexes have been prepared by Schiff-base condensation derived from 5-methylsalicylaldehyde, diethylenetriamine, tris(2-aminoethyl) amine, triethylenetetramine, N,N-bis(3-aminopropyl)ethylene diamine, N,N-bis(aminopropyl) piperazine, and gadolinium nitrate. All the complexes were characterized by elemental and spectral analyses. Electronic spectra of the complexes show azomethine (CH=N) within the range of 410-420 nm. The fluorescence efficiency of Gd(III) ion in the cavity was completely quenched by the higher chain length ligands. Electrochemical studies of the complexes show irreversible one electron reduction process around −2.15 to −1.60 V The reduction potential of gadolinium(III) complexes shifts towards anodic directions respectively upon increasing the chain length. The catalytic activity of the gadolinium(III) complexes on the hydrolysis of 4-nitrophenylphosphate was determined. All gadolinium(III) complexes were screened for antibacterial activity.

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Synthesis, electrochemical, catalytic and antimicrobial activities of novel unsymmetrical macrocyclic dicompartmental binuclear nickel(II) complexes

Cited by 56 publications

References 64 publications

Studies on Synthesis and Spectral Characterization of Some Transition Metal Complexes of Azo-Azomethine Derivative of Diaminomaleonitrile

Studies on Synthesis and Spectral Characterization of Some Transition Metal Complexes of Azo-Azomethine Derivative of Diaminomaleonitrile

N-functionalized cyclam based trinuclear copper(II) complexes: electrochemical, magnetic, catalytic and antimicrobial studies

Spectral, Electrochemical, Fluorescence, Kinetic and Anti-microbial Studies of Acyclic Schiff-base Gadolinium(III) Complexes

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