The Effect of Micelles on the Steady-State and Time-Resolved Fluorescence of Indole, 1-Methylindole, and 3-Methylindole in Aqueous Media

dc.contributor.author Ashby, K.
dc.contributor.author Das, K.
dc.contributor.author Petrich, Jacob
dc.contributor.author Petrich, Jacob
dc.contributor.department Chemistry
dc.date 2018-02-17T09:02:29.000
dc.date.accessioned 2020-06-30T01:22:07Z
dc.date.available 2020-06-30T01:22:07Z
dc.date.copyright Wed Jan 01 00:00:00 UTC 1997
dc.date.issued 1997-05-15
dc.description.abstract <p>3-Methylindole (skatole) is a component of animal waste and is, consequently, a primary component in odor problems arising in livestock management, notably swine production. The ability to probe and to exploit the interactions of 3-methylindole with micelles has important implications for monitoring and controlling odor problems. The effect of a surfactant (Brij-35) on the fluorescence properties of indole, 1-methylindole, and 3-methylindole in aqueous solutions is reported. Steady-state fluorescence spectra reveal a blue shift in the emission as the surfactant concentration is increased, while the absorption spectra are practically unaffected. Time-resolved fluorescence measurements reveal shorter average lifetimes for 3-methylindole (3-MI) as the Brij-35 concentration is increased. The fluorescence decay of 3-MI in water is described well by a single exponential, whereas, at the highest Brij-35 concentration, a triple exponential is necessary to describe the fluorescence decay. The contributions of each component in the fluorescence decay are used to determine the extent of 3-MI partitioning into the micelle phase. It is found that 93% of the 3-MI molecules partition into the micelle at the highest Brij-35 concentration used. The equilibrium constant for the association between the micelles and the 3-MI molecules is determined to be 2.6 × 104 M-1. In addition, the reduction of 3-MI in the vapor phase by addition of a dry surfactant, lecithin, is also demonstrated.</p>
dc.description.comments <p>Reprinted (adapted) with permission from <em>Analytical Chemistry</em> 69 (1997): 1925, doi: <a href="http://dx.doi.org/10.1021/ac9611632" target="_blank">10.1021/ac9611632</a>. Copyright 1997 American Chemical Society.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/chem_pubs/689/
dc.identifier.articleid 1653
dc.identifier.contextkey 7952310
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath chem_pubs/689
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/15171
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/chem_pubs/689/0-1997_PetrichJW_EffectMicellesSteady.pdf|||Sat Jan 15 01:29:53 UTC 2022
dc.source.bitstream archive/lib.dr.iastate.edu/chem_pubs/689/1997_PetrichJW_EffectMicellesSteady.pdf|||Sat Jan 15 01:29:54 UTC 2022
dc.source.uri 10.1021/ac9611632
dc.subject.disciplines Analytical Chemistry
dc.subject.disciplines Chemistry
dc.title The Effect of Micelles on the Steady-State and Time-Resolved Fluorescence of Indole, 1-Methylindole, and 3-Methylindole in Aqueous Media
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 563e8d72-b6e9-4617-91c0-589d263e00fc
relation.isOrgUnitOfPublication 42864f6e-7a3d-4be3-8b5a-0ae3c3830a11
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