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Studies in mixed solvents: Comparison between solvated electron reactions and quenching of excited states

โœ Scribed by Sudhir Kumar Kapoor; C. Gopinathan

Publisher
John Wiley and Sons
Year
1995
Tongue
English
Weight
547 KB
Volume
27
Category
Article
ISSN
0538-8066

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โœฆ Synopsis

Abstract

The rate constants for the reaction of electron pulse produced solvated electrons and a number of solutes in waterโ€isopropanol mixtures have been measured. The quenching of the singlet excited state of naphthalene has also been studied in the same mixtures, using triethylamine and acrylamide as quenchers. The variation of the bimolecular solvated electron reaction rate constants with the composition of the solvent has been compared with the variation in the quenching constants with the composition of the solvent. Both these variations are surprisingly similar, with acrylamide behaving in a reverse manner (to the other solutes) in both the cases. It has been possible to quantitatively correlate both sets of data using dielectric constant (ฯต) as a measure of polarity and the viscosity (ฮท) as an index of the microstructure. The curves obtained provide insights with respect to the nature of charge transfer processes involved. ยฉ 1995 John Wiley & Sons, Inc.

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