title: Highly sensitive and selective chemosensor for Hg2+ based on the rhodamine fluorophore.
abstract: A novel tren-based tripodal chemosensor 1 bearing a rhodamine and two tosyl groups was synthesized and its sensing behavior toward metal ions was investigated by UV/vis and fluorescence spectroscopies. Addition of a Hg2+ ion to a CH3CN solution of 1 gave a visual color change as well as significantly enhanced fluorescence, while other ions including Pb2+, Zn2+, Cu2+, Ca2+, Ba2+, Cd2+, Co2+, Mg2+, Ag+, Cs+, Li+, and Na+ induced no or much smaller color/spectral changes, which constituted a Hg2+-selective fluorescent chemosensor (OFF-ON).
authors.affiliation: Department of Chemistry, Institute of Nanosensor & Biotechnology, Dankook University, Seoul 140-714, Korea.
authors.forename: Min Hee
authors.initials: MH
authors.lastname: Lee
authors.forename: Jia-Sheng
authors.initials: JS
authors.lastname: Wu
authors.forename: Jeong Won
authors.initials: JW
authors.lastname: Lee
authors.forename: Jong Hwa
authors.initials: JH
authors.lastname: Jung
authors.forename: Jong Seung
authors.initials: JS
authors.lastname: Kim