FT-IR results showed that the Keggin geometry of PWA and PVPd were still preserved inside the PWA/PVPd composite thin films and the salts were formed by combining the ion based on the N atoms in the polymeric molecules and H+ of the polyanions.

• 红外光谱分析结果表明；Keggin结构钨磷酸和聚乙烯基吡咯烷酮分子的基本结构在复合薄膜中仍然存在；乙烯基吡咯烷酮分子基团质子化后与杂多阴离子成盐；形成电荷转移桥.