Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Beijing 100080, Peoples R China
; Chinese Acad Sci, Inst High Energet Phys, Beijing 100039, Peoples R China
A novel photochromic compound NH3CH2CH2NH3Mo3O10.4.4H(2)O has been synthesized using ethylenediammonium cations as template under mild chemical conditions. Elemental analysis, TGA curve and IR spectra show that its inorganic framework is constructed from infinite chains of (Mo3O10)(infinity)(2-). Ethylenediammonium cations are bounded to the inorganic chain structure through a supramolecular interaction. It is found that this compound has good photochromic property. Differing from vacuum deposited MoO3 film, this compound turns from white to reddish brown after UV irradiation. EXAFS spectra confirm proton transfer from ethylenediammonium cations to Mo-O- after UV irradiation.