Issue 9, 2012
From the journal:

Dalton Transactions

Peroxydisulfateactivation by [RuII(tpy)(pic)(H2O)]+. Kinetic, mechanistic and anti-microbial activity studies†

Debabrata Chatterjee,*a   Priyabrata Banerjee,a   Jagadeesh C. Bose Kb  and  Sudit Mukhopadhyayb  

* Corresponding authors

a Chemistry Group, Central Mechanical Engineering Research Institute, MG Avenue, Durgapur, India
E-mail: dchat57@hotmail.com
Fax: +91-343-2546745
Tel: +91-343-2546828

b Department of Biotechnology, National Institute of Technology, M. G. Avenue, Durgapur, India

Abstract

The oxidation of [RuII(tpy)(pic)H2O]+ (tpy = 2,2′,6′,2′′-terpyridine; pic− = picolinate) by peroxidisulfate (S2O82−) as precursor oxidant has been investigated kinetically by UV-VIS, IR and EPR spectroscopy. The overall oxidation of Ru(II)- to Ru(IV)-species takes place in a consecutive manner involving oxidation of [RuII(tpy)(pic)H2O]+ to [RuIII(tpy)(pic)(OH)]+, and its further oxidation of to the ultimate product [RuIV(tpy)(pic)(O)]+ complex. The time course of the reaction was followed as a function of [S2O82−], ionic strength (I) and temperature. Kinetic data and activation parameters are interpreted in terms of an outer-sphere electron transfer mechanism. Anti-microbial activity of RuII(tpy)(pic)H2O]+ complex by inhibiting the growth of Escherichia coli DH5α in presence of peroxydisulfate has been explored, and the results of the biological studies have been discussed in terms of the [RuIV(tpy)(pic)(O)]+ mediated cleavage of chromosomal DNA of the bacteria.

Graphical abstract: Peroxydisulfate activation by [RuII(tpy)(pic)(H2O)]+. Kinetic, mechanistic and anti-microbial activity studies

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Article information

DOI
https://doi.org/10.1039/C2DT11821A
Article type
Paper
Submitted
26 Sep 2011
Accepted
21 Nov 2011
First published
17 Jan 2012

Dalton Trans., 2012,41, 2694-2698

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Peroxydisulfate activation by [RuII(tpy)(pic)(H2O)]+. Kinetic, mechanistic and anti-microbial activity studies

D. Chatterjee, P. Banerjee, J. C. Bose K and S. Mukhopadhyay, Dalton Trans., 2012, 41, 2694 DOI: 10.1039/C2DT11821A

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