层状K_4Ag_2Sn_3S_9·2H_2O的溶剂热合成与表征  

Solvothermal Synthesis and Characterization of K_4Ag_2Sn_3S_9·2H_2O with Layer Structure

作　　者：白音孟和[1] 纪敏[1] 刘新[1] 安永林[1] 贾翠英[1] 宁桂铃[1] 

机构地区：[1]大连理工大学化学系,大连116024

出　　处：《高等学校化学学报》2004年第8期1391-1394,M003,共5页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金 (批准号 :2 0 0 710 0 6)资助

摘　　要：用溶剂热法合成了 K4 Ag2 Sn3S9· 2 H2 O,通过单晶 X射线衍射、 DSC、 TG、 IR和紫外漫反射光谱等手段对其进行了表征 .结果表明 ,K4 Ag2 Sn3S9· 2 H2 O属单斜晶系 ,P2 1 / m空间群 ,a=0 .780 71 ( 2 ) nm,b=2 .73 5 0 8( 1 ) nm,c=1 .0 5 0 0 8nm,α=90°,β=1 0 3 .87( 6)°,γ=90°,Z=4.其层状结构内具有一维孔道 。A novel compound K 4Ag 2Sn 3S 9·2H 2O with a layer structure was synthesized by a mild solvothermal route. The compound was characterized by X-ray diffraction,IR and UV-Vis diffusion reflectance spectrometry and DSC-TG techniques. The compound crystallizes in a monoclinic space group P2 1/m with a =0.780 71(2) nm, b =2.735 08(1) nm, c =1.050 08(2) nm, β =103.874(1), V =2.176 82(1) nm 3, Z =4. This compound comprises of hollow layers built from adamantane-like anionic clusters [AgSn 3S 9] 5- . Potassium ions and water molecules locate between the layers. The DSC-TG data show that this compound hydrolyzes partially during dehydration,and collapses at 450 ℃ in nitrogen. UV-Vis diffusion reflectance spectrum suggests that the title compound is a semiconductor with an estimated band gap of 2.4 eV.

关 键 词：溶剂热合成 K4Ag2Sn3S9·2H2O 层状结构 

分 类 号：O613[理学—无机化学]