喹啉类席夫碱锌离子荧光探针的合成及性能

The Sythesis and Properties of Zinc ions Fluorescent Probe Based on a Schiff base of Quinoline

摘要:

为了寻找性能更好的Zn2+荧光探针，本文以喹啉-8-甲醛和苯甲酰肼为原料合成了席夫碱结构的Zn2+荧光探针:N-(喹啉-8-亚甲基)苯甲酰肼（L），用红外光谱、核磁等对探针结构进行了表征，并对其检测Zn2+ 的机理进行了研究。Zn2+荧光探针有优良的选择性，最大荧光波长为523 nm，其检测限经计算为4.1×10-8 mol/L。探针与Zn2+形成物质的量比为1:1的配合物(L-Zn)，机理为三齿的配体通过喹啉氮原子、席夫碱亚胺氮原子和酰胺羰基氧原子与Zn2+ 配位，形成稳定的稠合化合物。

Abstract:

In order to look for a performance better the zinc ions fluorescent probe. In the paper, we synthesized zinc ions fluorescent probes, namely N- (quinoline-8-methylene) benzoyl hydrazide (L), based on a Schiff base structure, using quinoline-8-carboxaldehyde as the material, characterized with IR,NMR to structure of the fluorescent probe，and studied mechanism of zinc ions. Zinc ions fluorescent probe has excellent selectivity, the biggest fluorescence wavelength of 523 nm. The detection limit of zinc ions fluorescent probe was calculated as 4.1×10-8 mol/L. The result showed probe with zinc ions formed complex of the mole ratio of 1:1. Mechanism for tridentate ligand by nitrogen atom of quinoline, imine nitrogen atom of the Schiff base and oxygen atom of amide carbonyl with zinc ions coordination, forming stable fused compound.