A new Schiff-base type selective fluorescent chemosensor for Cu~(2+)

摘要

An original Schiff-base type fluorescent chemosensor l-phenyl-3-methyl-5-hydroxypyrazole-4-carbalde-hyde(benzoyl)hydrazone (H2L) for Cu~(2+) has been designed and synthesized. An obvious fluorescence quenching only for Cu~(2+) demonstrates that ligand H2L exhibits high selectivity and efficient signaling behavior toward micromolar concentration of Cu~(2+) compared with other metal ions. At the same time, the coordination form between ligand and Cu~(2+) is elucidated via crystal structure.