title: Highly selective and sensitive Hg2+ fluorescent sensors based on a phosphane sulfide derivative.
abstract: A series of fluorescent sensor molecules based on a phosphane sulfide derivative were designed and synthesized. The effect of the distance between the complex entities as well as the number and the length of fluorophores was investigated using both steady-state and time-resolved fluorescence methods. The complexation behavior of these sensor molecules, which have a distinct affinity for Hg(2+), is reported. The coordination of Hg(2+) induces a photoinduced electron transfer from fluorophore to the complexed mercury and results in a significant decrease of the fluorescence. Theses sensors exhibit very low detection limits in CH(3)CN/H(2)O (80/20 v:v) and excellent sensitivity to Hg(2+) over other potentially interfering cations such as Na(+), K(+), Mg(2+), Ca(2+), Cu(2+), Ag(+), Zn(2+), Cd(2+) and Pb(2+).
authors.affiliation: Institut d'Alembert, Laboratoire PPSM (CNRS UMR 8531), ENS Cachan, 61 Avenue du President Wilson, 94235, Cachan cedex, France.
authors.forename: Minh-Huong
authors.initials: MH
authors.lastname: Ha-Thi
authors.forename: Maël
authors.initials: M
authors.lastname: Penhoat
authors.forename: Véronique
authors.initials: V
authors.lastname: Michelet
authors.forename: Isabelle
authors.initials: I
authors.lastname: Leray