在乙二胺溶剂体系中,180℃条件下合成了两种化合物[M(en)_3]_2[Sn_2Se_4S_2](1)和[Co(en)3]2[Sn_2Se_4S_2](2)。通过X-射线单晶衍射、SEM、IR、TGA和UV-Vis等手段对其进行了表征。X-射线单晶衍射结果表明化合物1和2是类质同晶,均为正交...在乙二胺溶剂体系中,180℃条件下合成了两种化合物[M(en)_3]_2[Sn_2Se_4S_2](1)和[Co(en)3]2[Sn_2Se_4S_2](2)。通过X-射线单晶衍射、SEM、IR、TGA和UV-Vis等手段对其进行了表征。X-射线单晶衍射结果表明化合物1和2是类质同晶,均为正交晶系,并属于Pbca空间群,结构中均含有Sn和两种硫属元素S、Se组成的二聚体阴离子[Sn2Se4S2]2-。两种晶体的晶胞参数分别为:化合物1,a=1.6020(8)nm,b=1.1842(6)nm,c=1.9658(10)nm,Z=8;化合物2,a=1.5491(5)nm,b=1.1688(4)nm,c=1.18666(6)nm,Z=8。紫外-可见漫反射光谱研究结果表明,化合物1和2的禁带宽度分别为1.54 e V和1.64 e V,均有半导体性能。展开更多
Reactions of Sn powder, cadmium iodide, rubidium carbonate, and sodium sulfide yielded two new compounds： three-dimensional chalcogenide Rb Na_3Cd_2Sn_2S_8（1） and layered ternary compound Na_2CdS_2（2）. 1 and 2 ha...Reactions of Sn powder, cadmium iodide, rubidium carbonate, and sodium sulfide yielded two new compounds： three-dimensional chalcogenide Rb Na_3Cd_2Sn_2S_8（1） and layered ternary compound Na_2CdS_2（2）. 1 and 2 have been determined by single-crystal X-ray diffraction： 1 belongs to the orthorhombic space group Pca21, with a = 13.486（3）, b = 6.7310（14）, c = 18.401（4） ？ and Z = 4; 2 crystallizes in the R 3 m space group, with a = 3.718（3）, c = 26.170（4） ？ and Z = 3. Study of the yellow block shaped crystals of 1 reveals that the structure consists of tetrahedral CdS_4 and SnS_4. The {Cd_2Sn_2S_8} cluster shows a 12-numbered ring structure assembled by corner-sharing of alternating SnS_4 and CdS_4, and the rubidium and sodium ions act as void-filling and charge compensating cations. The dark orange hexagonal crystal of compound 2 consists of a unique 1$[CdS_2]^（2-） layer, which are separated by the Na＋. UV/Vis absorption spectrum exhibits the materials 1 and 2 have semiconductor properties.展开更多
文摘利用溶剂热法合成了硫代锡酸铯Cs4Sn5S12,单晶X-射线衍射结果表明Cs4Sn5S12属正交晶系,Pbca空间群,a=1.4232(4)nm,b=1.3161(4)nm,c=1.6372(5)nm,α=90°,Z=4。化合物Cs4Sn5S12中含有由八面体Sn S6和三角双锥Sn S5连接形成的层状阴离子[Sn5S12]4-∞。[Sn5S12]4-∞结构中有两种类型硫原子:连接六配位锡原子和五配位锡原子的硫原子以及只与两个五配位锡原子相连的硫原子。紫外-可见漫反射光谱表明Cs4Sn5S12为半导体,禁带宽度为2.3 e V。
文摘在乙二胺溶剂体系中,180℃条件下合成了两种化合物[M(en)_3]_2[Sn_2Se_4S_2](1)和[Co(en)3]2[Sn_2Se_4S_2](2)。通过X-射线单晶衍射、SEM、IR、TGA和UV-Vis等手段对其进行了表征。X-射线单晶衍射结果表明化合物1和2是类质同晶,均为正交晶系,并属于Pbca空间群,结构中均含有Sn和两种硫属元素S、Se组成的二聚体阴离子[Sn2Se4S2]2-。两种晶体的晶胞参数分别为:化合物1,a=1.6020(8)nm,b=1.1842(6)nm,c=1.9658(10)nm,Z=8;化合物2,a=1.5491(5)nm,b=1.1688(4)nm,c=1.18666(6)nm,Z=8。紫外-可见漫反射光谱研究结果表明,化合物1和2的禁带宽度分别为1.54 e V和1.64 e V,均有半导体性能。
基金supported by the National Natural Science Foundation of China(No.21461019)
文摘Reactions of Sn powder, cadmium iodide, rubidium carbonate, and sodium sulfide yielded two new compounds： three-dimensional chalcogenide Rb Na_3Cd_2Sn_2S_8（1） and layered ternary compound Na_2CdS_2（2）. 1 and 2 have been determined by single-crystal X-ray diffraction： 1 belongs to the orthorhombic space group Pca21, with a = 13.486（3）, b = 6.7310（14）, c = 18.401（4） ？ and Z = 4; 2 crystallizes in the R 3 m space group, with a = 3.718（3）, c = 26.170（4） ？ and Z = 3. Study of the yellow block shaped crystals of 1 reveals that the structure consists of tetrahedral CdS_4 and SnS_4. The {Cd_2Sn_2S_8} cluster shows a 12-numbered ring structure assembled by corner-sharing of alternating SnS_4 and CdS_4, and the rubidium and sodium ions act as void-filling and charge compensating cations. The dark orange hexagonal crystal of compound 2 consists of a unique 1$[CdS_2]^（2-） layer, which are separated by the Na＋. UV/Vis absorption spectrum exhibits the materials 1 and 2 have semiconductor properties.
