Lin Hua, Shen Jin-Ni, Zhu Wei-Wei, Liu Yi, Wu Xin-Tao, Zhu Qi-Long, Wu Li-Ming
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People's Republic of China.
College of Materials Science and Engineering, Fuzhou University, Fujian 350108, People's Republic of China.
Dalton Trans. 2017 Oct 17;46(40):13731-13738. doi: 10.1039/c7dt02545a.
Two novel ternary rare-earth chalcogenides, YbGaS and LuGaS, have been prepared by solid-state reactions of an elemental mixture at high temperatures. Their structures were determined on the basis of single-crystal X-ray diffraction. YbGaS crystallizes in the monoclinic space group C2/m (no.12) [a = 23.557(2) Å, b = 3.7664(4) Å, c = 12.466(1) Å, β = 90.915(9)°, V = 1105.9(2) Å and Z = 2], whereas LuGaS crystallizes in the triclinic space group P1[combining macron] (no.2) [a = 7.735(3) Å, b = 10.033(4) Å, c = 10.120(4) Å, α = 106.296(4)°, β = 100.178(5)°, γ = 101.946(3)°, V = 714.1(5) Å and Z = 2]. Both the structures feature complicated three dimensional frameworks with the unique interlinkages of GaS as basic building units. Significantly, photo-electrochemical measurements indicated that title compounds were photoresponsive under visible-light illumination. Furthermore, the UV-visible-near IR diffuse reflectance spectra, thermal stabilities, electronic structures, physical properties as well as a structure change trend of the ternary rare-earth/gallium/sulfur compounds have been evaluated.
通过高温下元素混合物的固态反应制备了两种新型三元稀土硫族化合物YbGaS和LuGaS。基于单晶X射线衍射确定了它们的结构。YbGaS结晶于单斜空间群C2/m（编号12）[a = 23.557(2) Å，b = 3.7664(4) Å，c = 12.466(1) Å，β = 90.915(9)°，V = 1105.9(2) Å，Z = 2]，而LuGaS结晶于三斜空间群P1[combining macron]（编号2）[a = 7.735(3) Å，b = 10.033(4) Å，c = 10.120(4) Å，α = 106.296(4)°，β = 100.178(5)°，γ = 101.946(3)°，V = 714.1(5) Å，Z = 2]。两种结构均具有复杂的三维框架，以GaS的独特互连作为基本构建单元。值得注意的是，光电化学测量表明标题化合物在可见光照射下具有光响应性。此外，还评估了三元稀土/镓/硫化合物的紫外-可见-近红外漫反射光谱、热稳定性、电子结构、物理性质以及结构变化趋势。
