Development of Ion Sensors Based on Supramolecular Membrane Materials and Examination of Its Response Mechanism

为了开发新型的离子传感器，我使用了形成超分子结构的功能材料作为离子敏感膜的膜材料。我选择了介孔二氧化硅和低分子质量凝胶剂作为超分子膜材料。用这些材料构建了离子敏感膜，并对其性能进行了研究。当冠醚与介孔二氧化硅化学键合时，与传统的基于相同冠醚的溶胶凝胶膜相比，选择性发生了显著的逆转。当凝胶膜被用作离子敏感膜时，即使没有向膜中添加任何离子载体，它们也表现出特定的离子选择性。为了阐明电动势的响应机理，用光谱方法对具有特殊离子传感特性的离子敏感膜进行了观察。

In order to develop novel ion sensors, I used functional materials, which form supramolecular structure, as membrane materials for ion-sensing membranes. I have chosen mesoporous silicas and low-molecular-weight gelators as supramolecular membrane materials. Ion-sensing membranes were constructed by these materials, and the ion sensor properties were investigated. When crown ethers were chemically bonded to mesoporous silicas, drastic selectivity reversal was achieved, in comparison with conventional sol-gel membranes based on the same crown ethers. When gel membranes were used as ion-sensing membranes, they showed specific ion selectivity, even though any ionophores were not added to the membranes. The ion-sensing membranes, which showed specific ion sensor properties, were observed by spectroscopic methods in order to elucidate response mechanism of EMF.