光致变色
材料科学
混合材料
分子
基质(化学分析)
氢键
化学工程
光化学
配体(生物化学)
涂层
辐照
金属
旋涂
化学
复合材料
纳米技术
有机化学
冶金
物理
工程类
受体
核物理学
生物化学
作者
Yan Huang,Qing Yi Pan,Xiao Wen Dong,Zhi Xuan Cheng
标识
DOI:10.1016/j.matchemphys.2005.08.039
摘要
Tungstosilicates (SiWA), acting as target molecules, were entrapped into MAAM/VTEOS/TEOS hybrid matrix by combining self-assembly technique and sol–gel process. The hybrid film was obtained by spin coating process and was characterized by IR, XRD and TG–DSC. Its photochromic behavior and mechanism were also studied by UV–vis and ESR spectrometries. The results show that SiWA still maintain Keggin structure in the matrix, interacted with –NH2 group of matrix through hydrogen bond. After UV irradiation, W6+ is reduced to W5+ due to ligand-to-metal charge transfer (LMCT) and a free radical is formed at the same time. The decoloration process is closely related to the presence of O2. The hybrid film exhibits an excellent photochromism, mechanical strength and thermodynamic stability.
科研通智能强力驱动
Strongly Powered by AbleSci AI