Single Crystal Proton Conduction Study of a Metal Organic Framework of Modest Water Stability
Single Crystal Proton Conduction Study of a Metal Organic Framework of Modest Water Stability
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DOI：
10.1021/jacs.7b03397
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发表时间：
2017-05-31
影响因子：
15
通讯作者：
Shimizu, George K. H.
中科院分区：
文献类型：
--
作者：
Joarder, Biplab;Lin, Jian-Bin;Shimizu, George K. H.
报道了具有阴离子层状结构的磺化铟（In）金属有机框架（MOF），其包含氢键键合的二甲基铵阳离子和水分子。MOF在>60%相对湿度下变成无定形;然而，粒状粉末的阻抗分析揭示了在25 ° C和40%RH下超过10（-3）S cm（-1）的质子传导值，这对于低湿度和中等温度是非常高的质子传导值。考虑到MOF的适度湿度稳定性，对单晶进行了三轴阻抗分析，证实了沿着两个轴的体质子电导率超过10（-3）S cm（-1），证实了来自颗粒的数据。
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 degrees 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.