2-羟基萘甲醛苯腙衍生物对氟阴离子的高选择性裸眼识别

合成了3种2-羟基萘甲醛苯腙衍生物1～3;取代基R:H(1),p-NO2(2),2,4-d-NO2(3)],应用紫外-可见吸收光谱研究了其与阴离子的相互作用,通过改变N1-苯环取代基考察了受体分子对阴离子亲合力和选择性的影响.结果表明,乙腈中F-及CH3COO-等阴离子使受体分子吸收光谱发生显著变化,溶液的颜色由黄色...

Highly Selective Colorimetric Fluoride Receptors Based on 2-Hydroxynaphthaldehyde Phenylhydrazone Derivatives

Three 2-hydroxy naphthaldehyde phenyl hydrazone derivatives were designed and synthesized (1-3; substituent R = p-H, p-NO2, 2, 4-(NO2)2). The interaction between the target compounds and anions was investigated by means of a UV spectrometer, and the effect of the affinity and selectivity of receptors to anions was also studied by changing the N’-substituted groups of benzene ring. The result showed that absorption spectra of receptors were red shifted significantly in acetonitrile solution containing F－and CH3COO－, and a clear color change was observed from yellow to blue or red in acetonitrile solution. The receptor molecule 2 had high selectivity and sensitivity response to F－ and will promise to a good sensing molecule in detection of F－by naked eye. The recognition selectivity of receptor molecule 3 to anion can be changed through adding water in acetonitrile solution, and receptor molecule 3 only recognized F－in 5％H2O-95％ CH3CN(V/V) solution, but had no evident response to other anions. So receptor molecule 3 is expected to be a new sensor which can recognize F－by naked eye in aqueous solution.