两种吡唑啉酮类光致变色化合物的合成及光学性能

摘要

Organic photochromic materials show promising applications in the fields of information storage,photoluminescence,holo-graphic anti-counterfeiting etc.Pyrazolone photochromic materials are a kind of new functional organic materials with photochromic properties in solid state,whereas most pyrazolones exhibit only one-way discoloration or thermochromic properties on color-chan-ging.In this work,two novel photochromic compounds were synthesized by introducing a substituted phenyl group at the 4-position of the pyrazolone ring.Their structure and color-changing mechanism were determined by mass spectrometry,nuclear magnetic reso-nance and infrared spectroscopy.The results of UV-Vis absorption spectra displayed that the compounds showed thermal increase phenomenon in addition to the discoloration irradiated by visible light.The fluorescence emission spectra showed that the two com-pounds exhibited high fluorescence contrast and good fluorescence switching modulation before and after UV irradiation.%有机光致变色材料在信息存储、光分子开光、全息防伪等领域显示出良好的应用前景.吡唑啉酮类光致变色材料是一类在固态下具有光致变色性能的新型有机功能材料,然而大多数吡唑啉酮类变色化合物只表现出单向变色或热致褪色的性能.本文通过在吡唑啉酮环的4位引入含双取代的苯基,合成了两种新颖的光致变色化合物,通过质谱、核磁共振谱、红外光谱确定了它们的结构和变色机理.紫外-可见吸收光谱表明化合物除在可见光下具有褪色性能外,还具有热增幅现象.荧光发射光谱表明,他们在紫外光和可见光的交替照射下表现出较高的荧光对比度和良好的荧光开关性能.