链状十五聚钒酸盐的水热合成和晶体结构  

Hydrothermal Synthesis and Crystal Structure of Chain-Like Pentadecovanadate

作　　者：洪掌珠[1] 林碧洲[1] 

机构地区：[1]华侨大学材料科学与工程学院,泉州362011

出　　处：《华侨大学学报（自然科学版）》2001年第4期412-417,共6页Journal of Huaqiao University(Natural Science)

基　　金：福建省自然科学基金资助项目

摘　　要：在 V2 O5:Cu Cl2 :1,2 - pn:H2 O物质的量之比为 3:1:8:4 0 0、反应温度为 15 0℃、反应时间为 3d的水热条件下 ,获得黑色针状 [Cu(1,2 - pn) 2 (H2 O) ]2 { [Cu(1,2 - pn) 2 ][V15O36 (Cl) ]} .H2 O晶体 .X-射线单晶结构分析表明 ,该晶体属正交晶系、Cmcm空间群 ,a=1.2 676(3) nm,b=2 .0 931(4 )nm ,c=2 .2 5 77(5 ) nm.在晶体结构中 ,笼形 [V15O36 (Cl) ]6 -钒氧簇与 [Cu(1,2 - pn) 2 ]2 +配位基团通过 Cu- O的共价配位作用连接成一维阴离子链 ,阳离子配位基团 [Cu(1,2 - pn) 2 (H2 O) ]2 +占据链间位置 ,起着电荷平衡的空间补偿作用 .Black needle-shaped crystals [Cu(1,2-pn) 2(H 2O)] 2{[Cu(1,2-pn) 2][V 15 O 36 (Cl)]}·H 2O were obtained by hydrothermal reaction of V 2O 5, CuCl 2, 1,2-diamino propane and H 2O in molar ratio of 3∶1∶8∶400 at 150 ℃ for three days. As determined by X-ray structural analysis of single crystal, this compound is crystallized in rhomic system, Cmcm space group with a=1.2 676(3) nm, b=2.0 931(4) nm, c=2.2 577(5) nm. In the crystal structure, the cage-like clusters [V 15 O 36 (Cl)] 6- connect with the coordination groups [Cu(1,2-pn) 2] 2+ throgh Cu-O covalent interactions and form an one-dimensional anion chains, while the cation groups [Cu(1,2-pn) 2(H 2O)] 2+ occupy the interchain position and take the roles of charge balance and space compensations.

关 键 词：多聚钒酸盐 晶体结构 水热合成 氧化钒 分子拓扑学 一维阴离子链 

分 类 号：O635.2[理学—高分子化学]