Metal-organic frameworks, which are three-dimensional nanoporous materials composed of metal ions and organic ligands, have recently attracted significant attention as functional materials owing to their structural flexibility in the material design of uniform-size nanopores. In this study, basic investigations of the electrical properties of Cu₃(btc)₂ (btc; 1,3,5-benzenetricarboxylic acid) were carried out using single crystalline samples. We determined that the pore-filling solvent absorbed by capillary condensation strongly dominated the electrical properties of Cu₃(btc)₂ single crystals. The extremely dense and highly insulating nanopores of Cu₃(btc)₂ enabled us to use liquids as solids by absorbing the liquids into the nanopores. By loading an ionic liquid, which is composed of tunable ionic compound (salt) with superior characteristics for electrolyte use, this substance can be used as a “solid electrolyte” for application to solid-state nanoionic devices without compromising its original ion transport property.

金属有机骨架是由金属离子和有机配体组成的三维纳米多孔材料，由于其在均匀大小的纳米孔的材料设计中的结构灵活性，最近作为功能性材料引起了广泛的关注。在这项研究中，使用单晶样品对Cu ₃（btc）₂（btc; 1,3,5-苯三甲酸）的电性能进行了基础研究。我们确定，通过毛细管缩合吸收的孔填充溶剂在很大程度上控制了Cu ₃（btc）₂单晶的电性能。Cu ₃（btc）₂的极致密和高度绝缘的纳米孔通过将液体吸收到纳米孔中，使我们能够将液体用作固体。通过加载由具有优异电解质特性的可调谐离子化合物（盐）组成的离子液体，该物质可以用作“固态电解质”，用于固态纳米离子器件，而不会损害其原始离子传输性能。