【摘要】 以硫醇为螯合剂,在溶剂热条件下合成了两种层状硫代亚碲酸盐KAgTeS3（1）和RbAgTeS3（2）.X射线单晶解析表明,1和2是类质同晶化合物.在晶体结构中,银硫四面体通过共用顶点形成无限的平行链,在相邻链中银硫四面体取向相反,这些链与链由三角锥配位的碲互相连接形成阴离子层状结构,阳离子在阴离子层间.1的结晶学数据为:M_r=370.75,P2₁/c,a=0.73639（6）nm,b=1.06468（8）nm,c=0.85203（6）nm,β=106.4640（10）°,V=0.64062（8）nm³,Z=4,R（F）=4.44%,wR（F²）=11.66%.2的结晶学数据:M_r=417.12,P2₁/c,a=0.75531（12）nm,b=1.07076（7）nm,c=0.8583（2）nm,β=106.497（6）°,V=0.66558（19）nm³,Z=4,R（F）=6.00%,wR（F²）=15.43%.DSC及紫外-可见漫反射光谱研究表明,这两种化合物为半导体,并具有很好的热稳定性.更多还原

【Abstract】 Two thio-tellurite KAgTeS₃ （1） and RbAgTeS₃ （2） were synthesized solvothermally and character-ized by X-ray single crystal diffraction. These isostructural compounds compose of infinite parallel chains formed by AgS₄ tetrahedra sharing their vertices, and these chains are further connected by trigonal- pyramidally coordinated Te⁴⁺ to form anionic layered structure with cations located between the layers. Crys-tal data for 1: M_r=370.75, P2₁/c, a=0.73639（6） nm, b=1.06468（8） nm, c=0.85203（6） nm, β=106.4640（10）°, V=0.64062（8） nm³, Z=4, Mo Kα, λ=0.071073 nm, R（F）=4.44%, wR（F²）=11.66%. Crystal data for 2: M_r=417.12, P2₁/c, a=0.75531（12） nm, b=1.07076（7） nm, c=0.8583（2） nm, β=106.497（6）°, V=0.66558（19） nm³, Z=4, Mo Kα, λ=0.071073 nm, R（F）=6.00%, wR（F²）=15.43%. UV-Vis diffusion reflec-tance spectra suggest that the crystals 1 and 2 are semiconductor with estimated band gaps 2.03 and 2.10 eV, re-spectively. The DSC data show that crystal 1 and crystal 2 collapse at 333 and 352 ℃ respectively, in nitrogen.更多还原