Citation: Chen Zhen, Wang Ru-Ji. Synthesis of Transition Metal Chalcogenide [M(en)3]2Sn2Se6(M=Mn,Zn) and Studies of Thermogravimeric Properties[J]. Acta Physico-Chimica Sinica, ;1999, 15(12): 1070-1075. doi: 10.3866/PKU.WHXB19991204
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The solvothermal technique was used for the synthesis of [M(en) 3] 2Sn2Sn6(M=Mn,Zn), which contains a zintl anion, [Sn2Sn6]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.
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