Spectrochemical investigations in molecularly organized solvent media: Evaluation of nitromethane as a selective fluorescence quenching agent for alternant PAHs dissolved in micellar solvent media
✍ Scribed by Siddharth Pandey; William E Acree Jr.; John C Fetzer
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 444 KB
- Volume
- 324
- Category
- Article
- ISSN
- 0003-2670
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✦ Synopsis
Applicability of the ni~omet]ume selective quenching role for discriminating between al~numt ver-~s nonall~nant polycyclic aromatic hydrocarbons (PAils) is examined for 29 representative PAH solutes dissolved in micellar cety~ ylammonium bromide (CTAB) and micellar sodium dodecylsulfate (SDS) solvent media. Experimental reauRs show that niUmmethene quenched fluorescence emission of only the 17 altemant PAils in the cationic CTAB sorfactam solvent media as expected, Emission intensities of nonalC:mvalt PAHs, except for the few exceptions noted previously, were u~ by nitremethane addition. Unexpected quenching behavior was observed, however, in the case of nonaltenumt PAH$ di~,olved in miceIIar SDS solvent media. Nitromethaue quenched fluorescence emission of non~/ernant PAI~ studied in the SDS solvent media, which is contrary to the selective quenching rule.