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Title: Synthesis, characterization , electrical and biological studies of Cr(III), Mn(III), Fe(III),Ti(III), VO(IV), Th(IV), Zr(IV) and UO2(VI) polychelates with bis-bidentate Schiff base
Authors: Aswar, A S
Bansod, A D
Aswale, S R
Mandlik, P R
Issue Date: Sep-2004
Publisher: NISCAIR-CSIR, India
IPC Code: Int. Cl.7 C07F 15/02; C07F 11 /00: C07F 13/00; C07F 7128; C07F 9/00
Abstract: The polychelates of Cr(III), Mn(III), Fe(III), Ti(III ), VO(IV), Th(IV), Zr(IV ) and UO2 (VI) with bis-bidentate Schiff base derived from 4,4'-bis[salicylaldehyde-5)-azo] diphenyl methane and aniline have been synthesized. The resulting compounds have been characterized on the basis of elemental analyses, reflectance and infrared spectral studies, magnetic measurements and thermogravimetric analysis and are found to have the general formula [M (BPSADM) xH2O]n. The ligand (H2BPSADM) act as a bis-bidentate molecule coordinating through the phenolic oxygen and azomethine nitrogen atoms. The thermal data have been analyzed for the kinetic parameters by using Broido's method. The thermal stability of these chelates decreases in the order Zr>M n>Th>UO2>Cr>Ti>Fe>VO. The thermal activation energy lies in the range 38.68 to 55. 18 kj mol-1 and the decomposition follows first order kinetics. The solid state conductivity of the ligand and its polychelates have been studied over the temperature range 313-493 K and the chelates are found to show semiconducting behaviour. The activation energy of the electrical conduction lies in the range 0.912 to 0.315 eV. The ligand and its polychelates have also been screened for their antimicrobial activities using various microorganisms and all of them have been found to be moderately active against the organisms.
Page(s): 1892-1896
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.43A(09) [September 2004]

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