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以罗丹明6G、香草醛、水合肼、1,8-萘酐为原料,通过酰亚胺化、亲电取代、亲核取代、希夫碱反应的方法合成了萘酰亚胺罗丹明汞离子荧光探针。通过核磁、红外等对产物结构进行表征。利用紫外和荧光光谱研究了其光学性能及对金属离子的识别响应。结果表明,产物在555 nm处,水:乙醇=8:2(V/V)介质中能对Hg~(2+)有专一识别作用。探针对Hg~(2+)响应的线性范围在63.77~93.29 ng/m L,r=0.9991,检出限为50.72 ng/m L,对Hg~(2+)响应灵敏度高,检出限低,是一种性能良好的荧光探针。
Rhodamine 6G, vanillin, hydrazine hydrate and 1,8-naphthalene anhydride were used as raw materials to synthesize rhodamine mercury ion through imidation, electrophilic substitution, nucleophilic substitution and Schiff base reaction Fluorescent probe. The product structure was characterized by NMR, IR and so on. The optical properties and recognition response to metal ions were studied by UV and fluorescence spectroscopy. The results showed that Hg 2+ could be specifically recognized by the product at 555 nm and water: ethanol = 8: 2 (V / V). The linear range of probe response to Hg 2+ ranged from 63.77 to 93.29 ng / m L, r = 0.9991 with a detection limit of 50.72 ng / m L and a high sensitivity to Hg 2+ detection limit Low, is a good fluorescent probe.