title: A PET-based fluorometric chemosensor for the determination of mercury(II) and pH, and hydrolysis reaction-based colorimetric detection of hydrogen sulfide.
abstract: A simple fluorescent chemosensor 1 for the detection of Hg(2+) and pH was developed by a combination of 2-aminoethyl piperazine and 4-chloro-7-nitrobenz-2-oxa-1,3-diazole. The sensor 1 showed OFF-ON behavior for different colors of fluorescence in the presence of Hg(2+) and under acidic conditions, respectively, in a near-perfect aqueous solution. The turn-on fluorescence caused by inhibition of photoinduced electron transfer was explained by theoretical calculations. 1 could be used to quantify Hg(2+) in water samples, and its in vitro studies with HeLa cells showed fluorescence in the presence of Hg(2+). In addition, 1 could selectively detect S(2-) by changing its color from orange to pink in a near-perfect aqueous solution. Moreover, 1 could be used as a practical, visible test kit for S(2-).
authors.affiliation: Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials, Seoul National University of Science and Technology, Seoul 139-743, Republic of Korea. chealkim@seoultech.ac.kr.
authors.forename: Jae Jun
authors.initials: JJ
authors.lastname: Lee
authors.forename: Yong Sung
authors.initials: YS
authors.lastname: Kim
authors.forename: Eunju
authors.initials: E
authors.lastname: Nam
authors.forename: Sun Young
authors.initials: SY
authors.lastname: Lee
authors.forename: Mi Hee
authors.initials: MH
authors.lastname: Lim
authors.forename: Cheal
authors.initials: C
authors.lastname: Kim