有机-无机杂化物：合成·表征·光致变色特性

doi:10.3969/j.cnki.jdxb.2016.03.015

摘要/Abstract

摘要：

用溶液法合成2种新型结晶化的有机-无机杂化物La2K(PMo₁₂O₄₀)(EDTA)₄（1）和Ni(PW₁₂O₄₀)(EDTA)₂（2）.利用红外光谱（IR)、差热-热重分析（TG-DTA）、循环伏安（CV)、固体荧光光谱(FL)、紫外-可见漫反射光谱(UV-Vis DRS)、能谱分析(EDS)、X-射线粉末衍射(XRD)对杂化物的组成、结构特征、光致变色性能进行系统研究.2种杂化物均表现出良好的光致变色性，紫外光照射下杂化物1由黄色变为墨绿色，杂化物2由蓝绿色变为灰黑色.暗处室温下保存，变色后的杂化物1稳定，光致变色不可逆，而杂化物2空气中避光4 h 能恢复到原来的颜色，温度升高该逆反应速度加快，无氧条件下该逆反应不发生，即杂化物2在有氧条件下，表现出良好的光致变色可逆性.2种混配物都对光响应速度快，是潜在的光学材料.

关键词： 多金属氧酸盐, 乙二胺四乙酸, 氨三乙酸, 有机-无机杂化物, 合成, 表征, 光致变色

Abstract:

Two novel crystalline inorganic-organic hybrid complexes La2K(PMo₁₂O₄₀)(EDTA)4 (1),Ni(PW₁₂O₄₀)(EDTA)₂ (2) have been successfully synthesized by solution method.The compositions，structure characteristics and photochromic properties of complexes have been systematically researched by infrared spectroscopy (IR),thermogravimetric-differential thermal analysis (TG-DTA),cyclic voltammetry (CV),fluorescent spectrum (FL),ultraviolet-visible diffuse reflectance spectrum (UV-Vis DRS) energy dispersive spectrometer (EDS)and X-ray power diffraction (XRD).The two hybrid complexes display excellent photochromism：under the ultraviolet light irradiation,the color of hybrid complex 1 quickly shifts from yellow to atrovirens，and complex 2 from blue-green to black-gray.Kept in dark at room temperature，the color-changing hybrid complex 1 is stable,showing irreversible photochromism;while complex 2 returns to its original color just for 4 h in dark place.The reverse reaction of complex 2 can be accelerated by increase in temperature.Without O₂ the reverse reaction of complex 2 will not happened，but in the existence of O₂,complex 2 exhibits excellent reversible photochromism.It can be concluded that the two complexes are all potential optical materials for their fast-responsiveness to light.

Key words: polyoxometalates, EDTA, nitrilotriacetic acid, inorganic-organic hybrid complex, synthesis, characterization, photochromism

滕春霖，张建斌，阳志军，薛连，李理，邓谦. 有机-无机杂化物：合成·表征·光致变色特性[J]. 吉首大学学报（自然科学版）, DOI: 10.3969/j.cnki.jdxb.2016.03.015.

TENG Chunlin,ZANG Jianbin,YANG Zhijun,XUE Lian,LI Li,DENG Qian. Synthesis，Characterization and Photochromism of Inorganic-Organic Hybrid Complexes[J]. Journal of Jishou University（Natural Sciences Edition), DOI: 10.3969/j.cnki.jdxb.2016.03.015.

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