✦ LIBER ✦

Evaluation of partition coefficients in micelles from combined steady-state and time-resolved fluorescence-quenching data

✍ Scribed by Maria Isabel Viseu; Sílvia M.B. Costa

Publisher: Elsevier Science
Year: 1990
Tongue: English
Weight: 567 KB
Volume: 175
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(90)85515-e

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✦ Synopsis

A method is proposed to evaluate the partition law of a quencher between the aqueous and the micellar pseudophases, using combined steady-state and time-resolved fluorescencequenching data. This method was applied to the partition between nonionic triton X-100 micelles and water of two quenchers of the chlorophyll a fluorescence: (i) tetrazolium blue (TB") and (ii) anthraquinone-2-sulfonate ( AQS-). The partition law obtained indicates that the distribution statistics of both quenchers is not Poissonian, but, instead, has mainly a binomial character.