Fluorescence "turn-on" sensing of carboxylate anions with oligothiophene-based o-(carboxamido)trifluoroacetophenones

被引：73
作者：
Kim, Dae-Sik
Ahn, Kyo Han [1 ]
机构：
[1] POSTECH, Dept Chem, Pohang 790784, South Korea
来源：
JOURNAL OF ORGANIC CHEMISTRY | 2008年 / 73卷 / 17期
关键词：
D O I：
10.1021/jo801178y
中图分类号：
O62 [有机化学];
学科分类号：
070303 ; 081704 ;
摘要：
o-(Carboxamido)trifluoroacetophenones containing ter- or pentathiophene moiety as a fluorophore exhibit fluorescence enhancement upon binding carboxylate anions. Particularly, the terthiophene derivative shows a large fluorescence enhancement factor (FEF = 120). The enhancement is explained by intramolecular H-bonding stabilization of an anion-ionophore adduct, through which a possible quenching process, the n-pi* transition from the trifluoroacetophenone moiety, is eliminated.
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页码：6831 / 6834
页数：4
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