硝基取代苯腙类荧光受体的阴离子识别与传感性能

合成了含萘荧光基团的硝基取代苯腙类受体，利用紫外-可见分光光度法、荧光发射光谱法和核磁等方法研究了受体的阴离子识别与光化学传感性能. 结果表明，在DMSO有机溶剂体系中，单硝基取代受体选择性比色和荧光识别氟离子，而双硝基取代受体可以比色和荧光识别氟离子和醋酸根离子. 归因于腙=N-NH基团质子酸性的进一步增强，双硝基取代受体能够在DMSO-H2O体系中实现对氟离子的比色和荧光识别. 此类受体是有效的“off-on”型阴离子荧光传感分子.

Recognition and sensing properties of nitro-substituted phenyl hydrazone-based fluorescence receptors for anions

Nitro-substituted phenyl hydrazone-based fluorescence receptors containing naphthalene substituent have been designed and synthesized. The recognition and sensing properties for anions were studied by UV-Vis spectrophotometry, fluorescence spectroscopy and 1H NMR. The results show that nitro-substituted phenyl hydrazone-based fluorescence receptors exhibit a high selective colorimetric and fluorescent recognition for F- in the DMSO solution. Especially, receptors bearing two nitro-groups on the phenyl hydrazone moiety, leading to the further increase of the acidity of hydrazone NH proton, have an additional colorimetric and fluorescent response to AcO- in the DMSO solution, and also show a high selective colorimetric and fluorescent sensing for F- in the DMSO-H2O media. The hydrazone-based receptors can act as efficient "off-on" fluorescence probes for anions. The study on the mechanism of the anion recognition and sensing has also been carried out.