[(HOCH_2CH_2)_2NH_2]_8·[SiW_(12)O_(40)]_2·H_2O的合成、表征、晶体结构及性质  

Preparation, Characterization, Crystal Structure of a Charge-Transfer Complex Based on H_4SiW_(12)O_( )40·nH_2O and Diethanolamine

作　　者：王敬平[1] 郭东杰[1] 牛景扬[1] 

机构地区：[1]河南大学化学化工学院,开封475001

出　　处：《应用化学》2002年第9期852-857,共6页Chinese Journal of Applied Chemistry

基　　金：河南省杰出青年基金;河南省自然科学基金 (0 0 40 3 180 00 0 40 40 3 0 0 )资助项目

摘　　要：由二乙醇胺与 H4 Si W1 2 O4 0 ·n H2 O合成了 [(HOCH2 CH2 ) 2 NH2 ]8· [Si W1 2 O4 0 ]2 · H2 O。单晶结构解析结果表明 ,晶体属三斜晶系 ,空间群 P 1 ,晶胞参数 :a=1 .3 5 3 2 (3 ) nm,b=1 .92 3 3 (4 ) nm,c=2 .0 472 (4 ) nm,α=89.2 8(3 )°,β=85 .49(3 )°,γ=82 .99(3 )°,Z=2 ,V=5 .2 75 4nm3,R=0 .0 60 2 ,Rw=0 .1 40 2。标题化合物分子由 2个杂多阴离子、8个质子化的二乙醇胺、1个结晶水组成。化合物具有可逆光色性。热分析结果表明 ,化合物阴离子在 5 48.A charge transfer complex, [(HOCH 2CH 2) 2NH 2] 8·[SiW 12 O 40 ] 2·H 2O, comprised of herteropoly acid (H 4SiW 12 O 40 ) and an organic substrate diethanolamine has been synthesized and characterized . Colorless crystals of the title compound were obtained from 0 1 mol/L HCl solution . Spectral data support the presence of a sizable electronic interaction between the organic substrate and the inorganic anion in the solid complex. It is strongly photosensitive under illumination of sunlight, resulting in charge transfer in oxidation of diethanolamine and reduction of poly oxometalate . The crystal of the title compund belongs to triclinic, space group P 1 , with a = 1 353 2(3) nm , b = 1 923 3(4) nm , c =2 047 2(4) nm, α =89 28(3)°, β =85 49(3)°, γ =82 99(3)°, Z =2, V = 5 275 4 nm 3 , μ =26 188 mm -1 and F (000)=5 844.

关 键 词：[(HOCH2CH2)2NH2]8·[SiW12O40]2·H2O 合成 表征 杂多金属氧酸盐 钨硅酸 二乙醇胺 晶体结构 KEGGIN结构 X射线衍射 

分 类 号：O641.4[理学—物理化学]