An efficient chloride-selective fluorescent chemosensor based on 2,9-bis(4'-hydroxyphenyl)phenanthroline Cu(II) complex

A new complex Cu(II)/ L , composed of 2,9-bis(4′-hydroxyphenyl)phenanthroline ( L ) and Cu(II), was synthesized as an efficient chloride-detection fluorescent chemosensor with high selectivity and sensitivity over other halide anions, F − , Br − , I − . The recognition mechanism was discussed primarily.