摘要
通过电化学还原的方法得到钼硅杂多酸的还原产物杂多蓝单晶H_8SiMo_(12)O_(40)·12H_2O.测完了它的晶体结构.晶体空间群属PI.α=1.3769(3)nm,b=1.4346(4)nm,c=1.4134(4)nm;α=120.47(2)°,β=110.70(2)°,γ=66.11(2)°;Z=2;R=0.0608.确证杂多蓝阴离子呈现Keggin结构和α-异构体特征,基本保持未还原杂多酸阴离子的结构.但是在结构畸变程度、键角和键长的变化以及结晶水的分布上有明显不同.同时确定了杂多蓝阴离子结构中4个Mo^(5+)离子的位置.
The single crystal of heteropoly blue, H_8SiMo_(12)O_(40)·12H_2O, the reduced product of molybdenum-silicon heteropoly acid, was prepared by electrochemical reduction and evaporation in nitrogen atmosphere. The Crystal structure of the product was determined. The heteropoly blue H_8SiMo_(12)O_(40)·12H_2O, Crystallizes space group PI α= 1.3769(3)nm, b=1.4346(4)nm, c=l.4134(4)nm, α=120.47(2)°, ￡=110.70(2)°, r=66.11(2)°, Z=2, R=0.0608. The heteropoly blue anion was determined to have Keggin Structure and α-isomer and it remained the structure of the unreduced heteropoly acid anion. But the distortion of the structure and the changes of bond length and bond angle take place obviously. The four Mo^(5+) Positions were determined in the structure.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1992年第9期849-857,共9页
Acta Chimica Sinica
基金
国家自然科学基金资助的课题
