Hg2+-selective fluorescent chemosensor based on cation-π interaction

Research paper by Huixiao Yang, Qinzhi Hu, Guochun Ma, Guofeng Chen, Minli Tao, Wenqin Zhang

Indexed on: 13 Oct '14Published on: 13 Oct '14Published in: Chemical Research in Chinese Universities


Two sulphur-containing 4-aminonaphthalimide derivatives were investigated as Hg2+ fluorescent chemosensors. In CH3CN, both sensors present a remarkable fluorescence enhancement to Cu2+ and Fe3+, but a selective fluorescence quenching to Hg2+ among the other metal ions. A cation-π interaction between Hg2+ and the naphthalimide moiety was proposed and confirmed by the density functional theory(DFT).