摘要
采用sol-gel技术,利用缺位杂多酸中氧原子不饱和性,将Keggin结构缺位杂多酸盐SiW11以共价键结合到SiO2网络上,制备了SiW11／SiO2／PVA复合薄膜．IR光谱表明,SiW11在基体中基本保持Keggin结构,与SiO2网络上形成了W-O-Si共价键．由于W-O-Si键的生成,造成Keggin结构SiW11产生一定的形变．此薄膜在紫外光照射下变蓝,具有较好的光致变色性质．
A novel SiWll/SiO2/PVA hybrid film was fabricated by using a sol-gel method. Mono-vacant Keggin-type polyoxometalates [X^n＋W11O39]^（12-n）- （SiW11） were introduced into SiO2 network. The IR spectrum indicates that the covalent bond of W-O-Si is formed between SiWll and SiO2 network, and SiWll anions still maintain Keggin structure basically in the hybrid film. However, ~he strong reaction between SiWll and matrix brings big shape changes on SiWll anions. The transparent film changes from colorless to dark blue under UV irradiation and shows a good photochromic behavior.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第2期369-372,共4页
Journal of Inorganic Materials
基金
上海市纳米专项基金(0452nm073)
