以香豆素为母体的荧光探针的合成、离子识别及拟合计算研究

The Syntheses、Ionic Recognition and Theoretical Calculation of the Fluorescence Probe Derived from Coumarin

摘要:

设计合成了含噻唑和腙结构的香豆素类钴离子荧光探针分子CCo，其结构用1HNMR和13CNMR进行了表征，考察了其光谱性能和电化学性能，并对其结构进行了拟合计算研究。CCo在常见金属离子（Cd2+、Co2+、Na+、Mn2+、Fe3+、Pb2+、Hg2+、Cu2+、Zn2+、Cu+、K+、Mg2+、Ag+、Ni2+、Cr3+) 中能够选择性地识别Co2+。滴加Co2+后探针吸收光谱红移60 nm,荧光光谱蓝移75 nm。探针分子溶液在三电极系统及四丁基高氯酸胺作电解质下能用于Hg2+的检测。通过拟合计算进一步验证了探针吸收光谱峰值与实验值一致。

Abstract:

A novel fluorescent molecular probe CCo for Co2+ based on the coumarin-thiazole-hydrazone-functional structure was designed and synthesized. The molecular structure were characterized by 1HNMR and 13CNMR etc. The spectral properties, the electrochemical properties and the quantum chemical calculation of CCo were studied. CCo exhibited high selectivity to Co2+ among such metal ions as Cd2+, Co2+, Na+, Mn2+, Fe3+, Pb2+, Hg2+, Cu2+, Zn2+, Cu+, K+, Mg2+, Ag+, Ni2+, Cr3+. The addition of Co2+ led to a 60 nm red-shift in absorption spectra and 75 nm blue-shift in fluorescence spectra. To use tetrabutylammonium perchlorate as the supporting electrolyte, the CCo solution with three electrode system could recognize Hg2+. The peak value of the absorption spectra for the CCo which was verified from the theoretical calculation was consistent with the experimental value.