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Pyrene fluorescence in the presence of nonquenching and dynamic quenching salting-out agents

Paper ID Volume ID Publish Year Pages File Format Full-Text
28937 44107 2007 5 PDF Available
Title
Pyrene fluorescence in the presence of nonquenching and dynamic quenching salting-out agents
Abstract

A new, simple, and rapid method to determine Setschenow (i.e., salting-out) constants for luminescent organic compounds in aqueous solutions has been developed using steady-state and time-resolved fluorescence measurements. Application of the new method was demonstrated using pyrene in the presence of nonquenching (K+) and dynamically quenching (Cs+) akali metal chloride salt solutions at room temperature. For these two model systems, Setschenow constants for pyrene salting-out by KCl and CsCl were determined to be 0.211 and 0.355 M−1, respectively. We expect that the methodology reported in this paper can be applied equally well to interactions between a variety of salting-out agents and fluorescent biological and/or environmental molecules in aqueous solutions.

Keywords
Fluorescence; Quenching; Metals; Salting-out agents; Setschenow constant
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Pyrene fluorescence in the presence of nonquenching and dynamic quenching salting-out agents
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 185, Issue 1, 1 January 2007, Pages 57–61
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
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