文摘
A series of pyrazoline derivatives containing pyrazole group were synthesized and characterized by means of 1H NMR, FT-IR, MS and elemental analysis, and their UV–vis absorption behavior and fluorescent properties were also measured. Moreover, the influence of metal ions on spectral properties of synthetic products was examined with compound A 5 as an example. It has been found that all synthetic pyrazoline derivatives show two remarkable absorption peaks at about 260 and 360?nm and the maximum emission peak at 445-67?nm. Especially, the joined of Co2+ can quench the fluorescence of compound A 5 obviously.