[(CH_2OH)_3CNH_2]_2H_4SiW_(12)O_(40)·10H_2O的合成、性质及晶体结构

Synthesis, Properties and Crystal Structure of [(CH_2OH)_3CNH__2]_2H_4SiW_(12)O_(40)·10H_2O

合成了一种新的有机 -无机盐 [( CH2 OH) 3 CNH2 ]2 H4 Si W12 O4 0 · 1 0 H2 O,用元素分析、红外光谱、循环伏安和电子光谱进行了表征 .测定了单晶的晶体结构 ,该晶体属三斜晶系 ,P1空间群 ,晶胞参数为 a=1 .2 3 4 8( 3 ) nm,b=1 .3 0 85( 3 ) nm,c=1 .84 0 4 ( 4) nm,α=73 .88( 3 )°,β=74 .55( 3 )°,γ=87.4 0 ( 3 )°;Z=2 ;R=0 .0 871 .化合物的光色性研究表明从有机分子到杂多阴离子之间发生了电荷转移 ;电化学性质表明 ,化合物在 2 .0 mol/L H2 SO4 溶液中的氧化还原峰电流与扫速成线性关系 。

A novel organic inorganic salt, [(CH 2OH) 3CNH 2] 2H 4SiW 12 O 40 ·10H 2O, was synthesized and characterized by means of elemental analyses, IR spectrum, cyclic voltammogram and electronic spectrum. The crystal structure of [(CH 2OH) 3CNH 2] 2H 4SiW 12 O 40 ·10H 2O was determined belonging to triclinic with space group P1, a =1.234 8 (3) nm, b =1.308 5 (3) nm, c =1.840 4 (4) nm; α=73.88(3)°, β=74.55(3)°, γ=87.40(3)°, Z=2, R =0.087 1. Photochromism studies on [(CH 2OH) 3CNH 2] 2· H 4SiW 12 O 40 ·10H 2O show that the electron transfer takes place from the organic cation to the heteropolyanion. The electrochemical behavior of compound(Ⅰ) shows that the redox peak currents are proportional to the scan rate in H 2SO 4 solution of 2.0 mol/L which indicates the electrode reaction are surface controlled processes.