1050503-38-2Relevant articles and documents
Fluorescence "turn-on" sensing of carboxylate anions with oligothiophene-based o-(carboxamido)trifluoroacetophenones
Kim, Dae-Sik,Kyo, Han Ahn
, p. 6831 - 6834 (2008)
(Chemical Equation Presented) 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-π* transition from the trifluoroacetophenone moiety, is eliminated.