Journal of Jishou University(Natural Sciences Edition)

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Synthesis,Characterization and Photochromism of Inorganic-Organic Hybrid Complexes

TENG Chunlin,ZANG Jianbin,YANG Zhijun,XUE Lian,LI Li,DENG Qian   

  1. (Department of Chemistry and Chemical Engineering,Hunan University of Science and Technology,Xiangtan 411201,Hunan China)
  • Online:2016-05-25 Published:2016-06-24


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

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