[M(en)3]2Sn2Se6(M=Mn,Zn)的制备及其热稳定性

用有机溶剂热生长技术(SolvothermalTechnique)制备过渡金属锰和锌硒化物Mn(en)3]2Sn2Se6(Ⅰ),Zn(en)3]2Sn2Se6(Ⅱ).用单晶X射线衍射技术对其进行晶体结构分析.Zn(en)3]2Sn2Se6样品的热分析结果表明,该化合物的热分解分三步进行.光学性质测试表明它们是半导体材料,Mn(en)3]2Sn2Se6的能带隙为1.76eV.Zn(en)3]2Sn2Se6的能带隙为2.49eV.

Synthesis of Transition Metal Chalcogenide [M(en)_3]_2Sn_2Se_6(M=Mn,Zn) and Studies of Thermogravimetric Properties

The solvothermal technique was used for the synthesis of M(en) 3] 2 Sn 2Sn 6(M=Mn,Zn),which contains a zintl anion, Sn 2Sn 6] 4- and a complex cation,M(en) 3] 2 .The crystal structure has been determined by signle crystal X ray diffraction techniques.Both compounds crystallize in orthorhombic,space group Pbca with unit cell dimensions a =1.5927(4)nm, b =1.2204(3)nm, c =1.9336(7)nm, V =3.758(2)nm 3, Z =4 for Mn(en) 3] 2Sn 2Se 6;and a =1.5390(3)nm, b =1.1914(3)nm, c =1.9210(3)nm, V =3.522(1)nm 3, Z =4 for Zn(en) 3] 2Sn 2Se 6.Optical studies performed on the powder sample suggested that both compounds are semiconductors with a band gap of 1.76eV for Mn(en) 3] 2Sn 2Se 6,and 2.49eV for Zn(en) 3] 2Sn 2Se 6.The result of TGA thermal analysis on Zn(en) 3] 2Sn 2Se 6 indicated that the loss of enthylendiamine proceeded in three steps.The decomposition of Zn(en) 3] 2Sn 2Se 6 produced ZnSe,SnSe and Se as the final residues.