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Effect of coaggregate formation on the fluorescence quenching of anthracene derivatives by m ‐ N,N ‐diethyl‐aminophenyl carboxylates with different chain lengths as quenchers
Author(s) -
Shi JiLiang,
Qiu ZhiHai,
Jiang XiKui
Publication year - 1999
Publication title -
journal of physical organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.325
H-Index - 66
eISSN - 1099-1395
pISSN - 0894-3230
DOI - 10.1002/(sici)1099-1395(199910)12:10<735::aid-poc185>3.0.co;2-1
Subject(s) - chemistry , quenching (fluorescence) , lauric acid , acceptor , butyric acid , photochemistry , fluorescence , palmitic acid , electron acceptor , anthracene , electron donor , electron transfer , caprylic acid , organic chemistry , fatty acid , catalysis , physics , quantum mechanics , condensed matter physics
In the dioxane–H 2 O system, electron‐transfer quenching processes have been observed between the excited 9‐anthrylmethyl esters of butyric acid ( A‐4 ), caprylic acid ( A‐8 ), lauric acid ( A‐12 ) and palmitic acid ( A‐16 ) as fluorescence probes, and m‐N‐N ‐diethylaminophenyl esters of butyric acid ( P‐4 ), caprylic acid ( P‐8 ), lauric acid ( P‐12 ) and palmitic acid ( P‐16 ) as quenchers. The results indicate that the hydrophobic–lipophibic interaction (HLI)‐driven coaggregation of an acceptor and a donor can very effectively facilitate the electron‐transfer quenching process between the excited acceptor (or donor) and the ground‐state donor (or acceptor) after they become preassociated inside the coaggregate species. Furthermore, the extent of HLI‐driven coaggregation (preassociation) between the acceptor and the donor may be assessed from the slope B of the equation I 0 / I = A + B [Q]. The chain‐length effect and the effect of solvent aggregating power were also observed. Copyright © 1999 John Wiley & Sons, Ltd.