Studies on rapid molecular diffusion and charge propagation in a quasi-solid of nanostructured polymers

通过微波加热多糖水溶液，冷却固化，制备了含有多余水分的双螺旋纳米异质结构多糖网络准固体。在各种氧化还原分子存在的情况下制备固体，在冷却前将三个电极（工作电极、计数器电极和参比电极）浸泡在热溶液中，制备具有三个电极的含有氧化还原化合物的固体。因此，固态电化学测量首次实现。采用循环伏安法和交流阻抗法分析了固体中分子的离子电导率、电化学反应性和扩散系数。结果表明，固体中多糖的浓度和氧化还原化合物的结构决定了电化学反应和分子的扩散，从而分析了氧化还原分子的电荷传播机制。聚合物有琼脂糖、卡拉胶、琼脂等。测定了不同离子的离子电导率。对于氧化还原分子，研究分子扩散使用了具有增敏能力的Ru(bpy)_3^<2+>、具有不同催化功能的各种金属配合物（氰基配合物、胺配合物、普鲁士蓝等）和甲基紫素。积累了离子扩散和离子电导率的基本数据。结果表明，小离子的电导率与水溶液中的电导率相同。交流阻抗谱显示出有趣的结果，电极表面的电荷转移电阻和双层电容比水溶液中大，但电荷传输电阻随着多糖浓度的增加而减小。利用这些固体材料制成了湿度光传感器。该固体被成功地应用于固化染料敏化太阳能电池中的有机液体电解质溶液，使固体型电池的转换效率几乎与液体型电池相似。少

A quasi solid composed of double helical nanoheterostructured polysaccharide network involving excess water was prepared by heating an aqueous solution of the polysaccharide utilizing microwave irradiation and by the following cooling and solidification. The solid was prepared in the presence of various redox molecules and before cooling down three electrodes (working, counter, and reference) were soaked in the hot solution to prepare a solid involving redox compound installed with three electrodes. Thus, solid state electrochemical measurements were for the first time realized. The ionic conductivity, electrochemical reactivity and diffusion coefficient of molecules in the solid were analyzed by cyclic voltammetry and alternating current impedance spectroscopy. It was shown that electrochemical reactions and molecular diffusion depend on the polysaccharide concentration and the redox compound structure in the solid, so that the behavior was analyzed in relevance to the charge propagat … More ion mechanism through the redox molecules.As for the polymers, agarose, carageenan, agar, etc. were used. Ionic conductivity by various ions was measured. As for the redox molecules to study molecular diffusion, Ru(bpy)_3^<2+> with sensitizing ability, various metal complexes with various catalysis function (cyano complexes, ammine complexes, Prussian Blue, etc.), and methylviologen were used. Fundamental data of ion diffusion and ionic conductivity were accumulated. It was clarified that conductivity by small ions is the same as in an aqueous solution. Alternating current impedance spectroscopy exhibited interesting results that the resistance for charge transfer and double layer capacitance on the electrode surface is larger than those in an aqueous solution, but that the resistance for charge transport decreases with the increase of the polysaccharide concentration. By utilizing these solids photosensor of humidity was fabricated. The solid was successfully applied to solidify the organic liquid electrolyte solution in a dye-sensitized solar cell, giving almost similar conversion efficiency for the solid type cell as a liquid type one. Less