2-(Benzo-d-thiazol-2-yl)quinolone as a Fluorescent Chemosensor Material for Hg(II)

抄録

2-(Benzo-d-thiazol-2-yl)quinoline (BTQ) was synthesized and tested for its use as a fluorescent chemosensor material for Hg2+. We investigated the metal-ion recognition of BTQ by adding several metal ions (M2+) to a solution of BTQ in acetonitrile. The shape and intensity of the fluorescence spectra with excitation at 350 nm did not change upon addition of Cd2+, Ni2+, Zn2+, Co2+, Ca2+, and Ba2+ . However, the fluorescence emission of BTQ was quenched with the addition of Hg2+ or Cu2+. Furthermore, when excitation at 373 nm was used, fluorescence was not detected for pure BTQ and BTQ with Cd2+ , Ni2+ , Zn2+ , Co2+ , Ca2+ , Ba2+ , or Cu2+ in acetonitrile solution, whereas fluorescence was detected for BTQ in the presence of Hg2+. Thus, BTQ is well suited for use as a fluorescent chemosensor material for Hg2+.