Bulletin of the Korean Chemical Society

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

  • Vijayaraj, A. (Department of Inorganic Chemistry, School of Chemical Sciences, University of Madras, Guindy Maraimalai Campus) ;
  • Prabu, R. (Department of Inorganic Chemistry, School of Chemical Sciences, University of Madras, Guindy Maraimalai Campus) ;
  • Suresh, R. (Department of Inorganic Chemistry, School of Chemical Sciences, University of Madras, Guindy Maraimalai Campus) ;
  • Kumari, R. Sangeetha (Centre for Advanced Studies in Botany, University of Madras, Guindy Maraimalai Campus) ;
  • Kaviyarasan, V. (Centre for Advanced Studies in Botany, University of Madras, Guindy Maraimalai Campus) ;
  • Narayanan, V. (Department of Inorganic Chemistry, School of Chemical Sciences, University of Madras, Guindy Maraimalai Campus)
  • Received : 2012.06.05
  • Accepted : 2012.08.01
  • Published : 2012.11.20
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Abstract

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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