文献类型：期刊文献

英文题名：Highly Anisotropic and Water Molecule-Dependent Proton Conductivity in a 2D Homochiral Copper(II) Metal-Organic Framework

作者：Li, Rong[1,2];Wang, Shuai-Hua[1];Chen, Xu-Xing[1];Lu, Jian[1,2];Fu, Zhi-Hua[1];Li, Yan[3];Xu, Gang[1];Zheng, Fa-Kun[1];Guo, Guo-Cong[1]

机构：[1]Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350002, Fujian, Peoples R China;[2]Univ Chinese Acad Sci, Beijing 100039, Peoples R China;[3]East China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China

年份：2017

卷号：29

期号：5

起止页码：2321

外文期刊名：CHEMISTRY OF MATERIALS

收录：;EI(收录号：20171203474536);WOS:【SCI-EXPANDED(收录号:WOS:000396639400047)】；

基金：This work was financially supported by National Natural Science Foundation of China (21371170, 21301059, and 21601186) and the Strategic Priority Research Program of the Chinese Academy of Sciences (XDB20000000).

语种：英文

外文关键词：Copper compounds - X ray diffraction - Chains - Fuel cells - Anisotropy - Electrolytes - Hydrogen - Molecules - Crystalline materials - Hydrogen bonds - Organometallics - Proton conductivity

摘要：Proton conductivity research on single crystals is essential to [100] elucidate their conduction mechanism and guide the unidirectional crystal growth to improve the performance of electrolyte materials. Herein, we report a highly anisotropic proton-conductive 2D metal organic framework (MOF) [Cu-2(Htzehp)(2)(4,4'-bipy)]center dot 3H20 (1 center dot 3H20, H3tzehp = N-[2-(1Htetrazol-5-y0ethyl]-L-hydroxyproline) with definite crystal structures showing single-crystal. to single-crystal transformation between the anhydrate (1) and trihydrate (1 center dot 3H20) phases. The hydrogen bonded chains consisted of well-defined lattice water molecules and hydroxyl functional groups of the Htzehp2- ligand array inside the 2D interlayer spaces along the crystallographic a-axis ([100] direction) in 1 center dot 3H20. Temperature- and humidity-dependent proton conductivity was achieved along the [100] and [010] directions, respectively. The anisotropic proton conductivity of 6[100]/c[010] in a single crystal of 1.31120 was as high as 2 orders of magnitude. The highest proton conductivity of 1.43 X 10(-3) S cm(-1) of 1 center dot 3H20 at 80 degrees C and 95% relative humidity was observed among the reported 2D MOF crystals. The relation between the proton conductivity and structure was also revealed. The hydrogen bonded chain in P71E20 plays a significant role in the proton transport. The time-dependent proton conductivity and single-crystal X-ray diffraction measurements demonstrated that 1.31-120 is temperature- and humidity-stable and acts as an underlying electrolyte material for fuel cell applications.