title: A highly selective on-off-on responsive lanthanide(iii) based probe for recognition of copper and hydrogen sulfide.
abstract: The development of a europium(iii) based probe (EuL1) for the detection of Cu(ii) ions and hydrogen sulphide is presented. With the addition of Cu(ii) ions, EuL1 displayed the greatest quenching among the other cations examined. The binding constant was 74,026 ± 2899 M(-1). Once combined with Cu(ii) ions, EuL1Cu demonstrated high specificity for hydrogen sulfide compared to other organic and inorganic sulfur compounds. EuL1Cu exhibited an on-off-on type luminescence change with the alternate addition of Cu(ii) ions and H2S along with reversible forming-separating of the complex.
authors.affiliation: State Key Laboratory for Chirosciences, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong SAR, Hong Kong, China. ga-lai.law@polyu.edu.hk wing-tak.wong@polyu.edu.hk.
authors.forename: Yuk-Wang
authors.initials: YW
authors.lastname: Yip
authors.affiliation: State Key Laboratory for Chirosciences, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong SAR, Hong Kong, China. ga-lai.law@polyu.edu.hk wing-tak.wong@polyu.edu.hk and The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, PR China.
authors.forename: Ga-Lai
authors.initials: GL
authors.lastname: Law
authors.affiliation: State Key Laboratory for Chirosciences, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong SAR, Hong Kong, China. ga-lai.law@polyu.edu.hk wing-tak.wong@polyu.edu.hk.
authors.forename: Wing-Tak
authors.initials: WT
authors.lastname: Wong