A sulfonated indium (In) metal organic framework (MOF) is reported with an anionic layered structure incorporating hydrogen-bonded dimethylammonium cations and water molecules. The MOF becomes amorphous in >60% relative humidity; however, impedance analysis of pelletized powders revealed a proton conduction value of over 10^–3 S cm^–1 at 25 °C and 40% RH, a very high proton conduction value for low humidity and moderate temperature. Given the modest humidity stability of the MOF, triaxial impedance analyses on a single crystal was performed and confirmed bulk proton conductivity over 10^–3 S cm^–1 along two axes corroborating the data from the pellet.

中文翻译：

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适度水稳定性的金属有机骨架的单晶质子传导研究

据报道，磺化铟（In）金属有机骨架（MOF）具有结合了氢键合的二甲基铵阳离子和水分子的阴离子层状结构。MOF在相对湿度> 60％时变为非晶态；但是，丸状粉末的阻抗分析显示，在25°C和40％RH的条件下，质子传导值超过10 ^–3 S cm ^–1，对于低湿度和中等温度，质子传导值非常高。考虑到MOF的适度湿度稳定性，在单晶上进行了三轴阻抗分析，并确认了沿两个轴在10 ^–3 S cm ^–1上的体质子传导率，这证实了颗粒的数据。