Synthesis，Characterization and Photochromism of Inorganic-Organic Hybrid Complexes

doi:10.3969/j.cnki.jdxb.2016.03.015

Abstract

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

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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