采用动电位静电吸附法制备了Keggin型磷钼杂多酸-L-半胱氨酸自组装超分子膜修饰金电极(PMo12-L-Cys/Au膜电极),探讨了成膜机理. 水平衰减全反射(ATR)FTIR光谱技术研究表明,超分子膜的形成是通过PMo12O3-40阴离子与L-Cys中的-NH+3阳离子之间静电作用实现. 与溶液中PMo12O3-40相比,超分子膜能在较宽的pH范围内稳定存在,并对H+有灵敏的电位响应,测定了pH敏感膜电位传感器的性能参数.
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