NISCAIR Online Periodicals Repository

Research Journals >
Indian Journal of Chemistry -Section A (IJC-A) >
IJC-A Vol.50A [2011] >
IJC-A Vol.50A(09-10) [September-October 2011] >

Title: Osmium(II) mixed-chelate derived from imidazole 4,5-bis(benzimidazole) and 2,2'-bipyridine as multichannel sensor for anions: Synthesis, structural characterization and binding studies
Authors: Saha, Debasish
Das, Shyamal
Maity, Dinesh
Baitalik, Sujoy
Keywords: Coordination chemistry
Multichannel sensors
Anion sensors
Anion binding
Issue Date: Sep-2011
Publisher: NISCAIR-CSIR, India
Abstract: Mixed-ligand complex of composition [(bpy)2Os(H3Imbzim)](ClO4)2∙2H2O (1), where H3Imbzim = 4,5-bis(benzimidazole-2-yl)imidazole and bpy = 2,2¢-bipyridine, has been synthesized and characterized using standard analytical and spectroscopic techniques. The X-ray crystal structure of the complex has been determined which showed that it crystallized in triclinic form with the space group P-1. The anion binding properties of the complex has been thoroughly investigated in solution using absorption, emission, and 1H NMR spectral measurements. The metalloreceptor acts as sensor for F-, AcO-, and to some extent for H2PO4- anions. Although at relatively lower concentration of anions the 1:1 H-bonded adduct is formed, in the presence of excess of anions deprotonation of the imidazole N–H fragments occurs which is accompanied by a distinct change of color. Double deprotonation is also observed in the presence of hydroxide. The binding affinities of different anions towards the receptors have been evaluated. Cyclic voltammetry measurements carried out in acetonitrile have provided evidence in favor of an anion-dependent electrochemical response of the receptor with F- and AcO- ions.
Page(s): 1418-1428
CC License:  CC Attribution-Noncommercial-No Derivative Works 2.5 India
ISSN: 0975-0975(Online); 0376-4710(Print)
Source:IJC-A Vol.50A(09-10) [September-October 2011]

Files in This Item:

File Description SizeFormat
IJCA 50A(09-10) 1418-1428.pdf634.68 kBAdobe PDFView/Open
 Current Page Visits: 255 
Recommend this item


Online Submission of Articles |  NISCAIR Website |  National Knowledge Resources Consortium |  Contact us |  Feedback

Disclaimer: NISCAIR assumes no responsibility for the statements and opinions advanced by contributors. The editorial staff in its work of examining papers received for publication is helped, in an honorary capacity, by many distinguished engineers and scientists.

CC License Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India

Copyright © 2015 The Council of Scientific and Industrial Research, New Delhi. All rights reserved.

Powered by DSpace Copyright © 2002-2007 MIT and Hewlett-Packard | Compliant to OAI-PMH V 2.0

Home Page Total Visits: 170374 since 01-Sep-2015  Last updated on 30-Jun-2016Webmaster: