title: A dual functional probe for "turn-on" fluorescence response of Pb(2+) and colorimetric detection of Cu(2+) based on a rhodamine derivative in aqueous media.
abstract: A dual functional probe L based on rhodamine was devised and synthesized. Probe L can sense Pb(2+) and Cu(2+) in aqueous solution through two approaches: a significant fluorescence enhancement caused by Pb(2+) and a visible color change from colorless to orchid induced by Cu(2+). Competitive experiments showed that probe L had high fluorescence sensitivity for Pb(2+) and excellent colorimetric selectivity for Cu(2+) over many environmentally relevant ions. The mechanisms of L for sensing Pb(2+) and Cu(2+) have been well demonstrated by ESI-MS, (1)H NMR titration, IR, the crystal structure of L-Pb(2+) and density functional theory calculation of L-Cu(2+). In addition, fluorescence image detection of Pb(2+) in living cells displayed an enhanced fluorescence effect.
authors.affiliation: College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China. zangsqzg@zzu.edu.cn.
authors.forename: Min
authors.initials: M
authors.lastname: Li
authors.forename: Xiu-Juan
authors.initials: XJ
authors.lastname: Jiang
authors.forename: Hui-Hui
authors.initials: HH
authors.lastname: Wu
authors.forename: Hong-Lin
authors.initials: HL
authors.lastname: Lu
authors.forename: Hai-Yang
authors.initials: HY
authors.lastname: Li
authors.forename: Hong
authors.initials: H
authors.lastname: Xu
authors.forename: Shuang-Quan
authors.initials: SQ
authors.lastname: Zang
authors.forename: Thomas C W
authors.initials: TC
authors.lastname: Mak
mesh_terms: D003124:Colorimetry / Q000379:methods; D003300:Copper / Q000032:analysis*; D005456:Fluorescent Dyes / Q000737:chemistry*; D056945:Hep G2 Cells; D006801:Humans; D007854:Lead / Q000737:chemistry*; D012235:Rhodamines / Q000737:chemistry*; D014867:Water / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D005456:Fluorescent Dyes; D012235:Rhodamines; D014867:Water; D007854:Lead; D003300:Copper