title: A Turn-on Fluorescent Chemosensor for Zn(2+) Based on Quinoline in Aqueous Media.
abstract: A simple "off-on fluorescence type" chemosensor 1 3-((2-(dimethylamino)ethyl)amino)-N-(quinolin-8-yl)propanamide has been synthesized for Zn(2+). The receptor 1 comprises the quinoline moiety as fluorophore and the N,N(')-dimethylethane-1,2-diamine as a binding site. 1 showed a remarkable fluorescence enhancement in the presence of Zn(2+) in aqueous solution. Importantly, the chemosensor 1 could be used to detect and quantify Zn(2+) in water samples. In particular, this chemosensor could clearly distinguish Zn(2+) from Cd(2+). The binding properties of 1 with Zn(2+) ions were investigated by UV-vis, fluorescence, electrospray ionization mass spectroscopy and (1)H NMR titration.
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.
authors.forename: Yong Sung
authors.initials: YS
authors.lastname: Kim
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.
authors.forename: Jae Jun
authors.initials: JJ
authors.lastname: Lee
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.
authors.forename: Sun Young
authors.initials: SY
authors.lastname: Lee
authors.affiliation: School of Ecology & Environmental Systems, Kyungpook National University, Sangju, 37224, South Korea.
authors.forename: Pan-Gi
authors.initials: PG
authors.lastname: Kim
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@snut.ac.kr.
authors.forename: Cheal
authors.initials: C
authors.lastname: Kim
keywords: Chemosensor; Determination of Zn ion; Fluorescence enhancement; Quinoline