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Trigonal Planar [HgSe3]4– Unit: A New Kind of Basic Functional Group in IR Nonlinear Optical Materials with Large Susceptibility and Physicochemical Stability
- Li, Chao, Yin, Wenlong, Gong, Pifu, Li, Xiaoshuang, Zhou, Molin, Mar, Arthur, Lin, Zheshuai, Yao, Jiyong, Wu, Yicheng, Chen, Chuangtian
- Journal of the American Chemical Society 2016 v.138 no.19 pp. 6135-6138
- anions, melting, mercury
- A new mercury selenide BaHgSe₂ was synthesized. This air-stable compound displays a large nonlinear optical (NLO) response and melts congruently. The structure contains chains of corner-sharing [HgSe₃]⁴– anions in the form of trigonal planar units, which may serve as a new kind of basic functional group in IR NLO materials to confer large NLO susceptibilities and physicochemical stability. Such trigonal planar units may inspire a path to finding new classes of IR NLO materials of practical utility that are totally different from traditional chalcopyrite materials.