Dimeric Organic–Inorganic Hybrid Zr-Substituted Antimonotungstate-Featured Photochromic Responses
Miao Zhang, Lihua Liu, Yizhen Song, Mengmeng Hou, Lin Sun, Pengtao Ma
Abstract
Photochromic materials are increasingly attracting attention for their potential applications in smart devices. Here, a novel organic–inorganic hybrid Zr-containing polyoxometalate [H 2 N(CH 3 ) 2 ] 10 H 8 [Zr(DL-tart) 2 (SbW 17 ZrO 58 ) 2 ]·36H 2 O (DL-tartH 4 = dl -Tartaric Acid) (1) was synthesized. The dimeric polyanion of 1 contains two Dawson-like {SbW 17 ZrO 58 } 7– subunits bridged by one {Zr(DL-tart) 2 } 4– connector. Interestingly, compound 1 exhibits a rapid photochromic response with a half-life ( t 1/2 ) of 6.62 s, good reversibility, and an easy fading process in an air environment. Notably, compound 1 also retains its photochromic behavior upon exposure to visible light irradiation.