title: Anthracene appended pyridinium amide-urea conjugate in selective fluorometric sensing of L-N-acetylvaline salt.
abstract: A new anthracene labeled pyridinium amide-urea conjugate 1 has been designed and synthesized. The receptor shows a different fluorometric response with L-N-acetylvaline and L-N-acetylalanine salts in CH₃CN in contrast to the other salts of L-N-acetyl α-amino acids and (S)-α-hydroxy acids studied. Upon complexation of the tetrabutylammonium salt of L-N-acetylvaline, the emission of 1 increases accompanied by the formation of a new band at higher wavelength and this characteristic change distinguishes it from other anionic substrates studied. The binding interaction has been studied by ¹H NMR, fluorescence and UV titration experiments.
authors.affiliation: Department of Chemistry, University of Kalyani, Kalyani-741235, India, Fax +91-33-25828282. ghosh_k2003@yahoo.co.in
authors.forename: Kumaresh
authors.initials: K
authors.lastname: Ghosh
authors.forename: Tanmay
authors.initials: T
authors.lastname: Sarkar
authors.forename: Asoke P
authors.initials: AP
authors.lastname: Chattopadhyay