Huang Xiao, Yang Si-Han, Liu Wenlong, Guo Sheng-Ping
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, P. R. China.
Inorg Chem. 2022 Aug 22;61(33):12954-12958. doi: 10.1021/acs.inorgchem.2c01678. Epub 2022 Aug 10.
The discovery of new types of metal sulfides is attractive because of their rich structures and diverse physical properties. Here, a novel quaternary sulfide, BaHgGaS (BHGS), is obtained by a solid-state reaction at 1123 K. It crystallizes in the monoclinic space group 2/, and its zero-dimensional structure features two seesaw-like HgS units and four GaS tetrahedra, constructing a unique [HgGaS] string. BHGS has a wide band gap of 3.64 eV and a large birefringence of 0.09 at 2100 nm. Specifically, BHGS exhibits a remarkable photocurrent response. This work may be extended to a new family of AEMMQ (AE = Mg, Ca, Sr, Ba; M = Zn, Cd, Hg; M = Al, Ga, In; Q = S, Se) chalcogenides.
新型金属硫化物的发现因其丰富的结构和多样的物理性质而备受关注。在此，通过在1123 K下进行固态反应获得了一种新型的四元硫化物BaHgGaS（BHGS）。它结晶于单斜空间群2/，其零维结构具有两个类似跷跷板的HgS单元和四个GaS四面体，构建了独特的[HgGaS]链。BHGS具有3.64 eV的宽带隙和在2100 nm处0.09的大双折射。具体而言，BHGS表现出显著的光电流响应。这项工作可能会扩展到AEMMQ（AE = Mg、Ca、Sr、Ba；M = Zn、Cd、Hg；M = Al、Ga、In；Q = S、Se）硫族化物的新家族。
