中文摘要：

利用层接层自组装方法,将Keggin型多酸（PW_（12））和染料中性红（NR）制备成复合膜材料.采用紫外-可见吸收光谱（UV-vis）、扫描电子显微镜（SEM）和循环伏安法（CV）等手段对复合材料的形貌和电致变色性能进行了表征.复合膜材料呈现出良好的电致变色性能,其光反差可达6.0%,着色效率高达14.6cm^2/C,着色与褪色时间分别为14.6和16.9s.而且,复合膜实现了深粉色、淡紫色和深紫色的可调变颜色变化.

英文摘要：

The composite film of Keggin polyoxometalate cluster（PW_（12）） and Neutral Red（NR） was fabricated by layer-by-layer（Lb L） method. The morphology and electrochromic properties of the composite film were characterized by UV-vis spectroscopy（UV-vis）, scanning electron microscopy（SEM）, and cyclic voltammetry（CV）. It displays high electrochromic performance with optical contrast of 6.0%, coloration efficiency of 14.6 cm~2/C. Furthermore, the switching times were 2.4 s for coloration and 3.1 s for bleaching. In addition, the composite film varied from dark pink to light purple and finally dark purple.