title: Selective and sensitive fluorescence-shift probes based on two dansyl groups for mercury(ii) ion detection.
abstract: Two probes ( and ) bearing two dansyl fluorophores were synthesized and applied to the detection of mercury(ii) ions in aqueous solution. These probes exhibited a selective response to Hg(2+) in a buffered solution, with high sensitivity and a unique fluorescence response signal which displayed a blue-shift effect in the fluorescence emission peak. The Hg(2+) recognition mechanisms of the probes were determined by NMR spectroscopy, ESI-MS and UV-vis spectroscopy. The results showed that probe and mercury(ii) ions formed an unusual 2:2 stoichiometric ratio complex, while probe and Hg(2+) formed a multidentate complex with a stoichiometric ratio of 2:1.
authors.affiliation: Department of Chemistry and Environment, South China Normal University, Shipai, Guangzhou 510631, P. R. China. mlj898021@aliyun.com.
authors.forename: Li-Jun
authors.initials: LJ
authors.lastname: Ma
authors.forename: Jialun
authors.initials: J
authors.lastname: Liu
authors.forename: Lefang
authors.initials: L
authors.lastname: Deng
authors.forename: Meili
authors.initials: M
authors.lastname: Zhao
authors.forename: Zhifu
authors.initials: Z
authors.lastname: Deng
authors.forename: Xutian
authors.initials: X
authors.lastname: Li
authors.forename: Jian
authors.initials: J
authors.lastname: Tang
authors.forename: Liting
authors.initials: L
authors.lastname: Yang