NISCAIR Online Periodicals Repository

NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR)  >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Chemistry -Section A (IJC-A) >
IJC-A Vol.46A [2007] >
IJC-A Vol.46A(08) [August 2007] >


Title: Electrochemistry of [Fe₄S₄(SCH₂CH₂COO-)₄]⁶⁻ in liposomes and microemulsions
Authors: Roy, Raben Ch
Das, Diganta Kumar
Das, Biva
Issue Date: Aug-2007
Publisher: CSIR
IPC CodeInt. Cl. ⁸ C25B
Abstract: [Fe₄S₄(SCH₂CH₂COO-)₄]⁶⁻, a structural analogue of active center of ferredoxin and P cluster of nitrogenase, shows two distinct reversible couples with redox potential values –643±5 mV and –972±5 mV vs. Ag-AgCl due to 3+/2+ and 2+/1+ couples of the core [Fe₄S₄] respectively in liposomes. Two redox linked protonation sites, with pKox at 3.2 with corresponding pKred at 4.3 due to carboxylate and another pKred at 5.8 due to thiopropionate S shift the redox potential of 3+/2+ couple by 200 mV. In microemulsion containing negative sds molecules (ME-sds) the redox potentials due to 3+/2+ and 2+/1+ couples are –670 mV and –920 mV (pH=4.6) while these values are –544 mV and –800 mV respectively (pH=5.5) versus Ag-AgCl in microemulsion containing positive ctab molecules (ME-ctab). The trend in diffusion co-efficient of the cluster in different medium is found to be: ME-sds>ME-ctab>lposomes.
Page(s): 1252-1256
ISSN: 0376-4710
Source:IJC-A Vol.46A(08) [August 2007]

Files in This Item:

File Description SizeFormat
IJCA 46A(8) 1252-1256.pdf200.78 kBAdobe PDFView/Open
 Current Page Visits: 509 
Recommend this item

 

National Knowledge Resources Consortium |  NISCAIR Website |  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 © 2012 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: 603000 since 06-Feb-2009  Last updated on 21-Oct-2014Webmaster: nopr@niscair.res.in