| Literature DB >> 18672938 |
Abstract
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.Entities:
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Year: 2008 PMID： 18672938 DOI： 10.1021/jo801178y
Source DB: PubMed Journal: J Org Chem ISSN： 0022-3263 Impact factor: 4.354