Inherent Proton Conduction in a 2D Coordination Framework
Inherent Proton Conduction in a 2D Coordination Framework
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DOI：
10.1021/ja304693r
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发表时间：
2012-08-01
影响因子：
15
通讯作者：
Kitagawa, Susumu
中科院分区：
文献类型：
--
作者：
Umeyama, Daiki;Horike, Satoshi;Kitagawa, Susumu
我们合成了一种由Zn ~（2+）、1，2，4-三氮唑和正磷酸盐组成的配位聚合物，并首次证明了这种配位网络的固有质子传导性。该化合物具有二维层状结构，层与层之间具有扩展的氢键。它示出了固有的质子导电性沿着平行于层的方向，如粉末和单晶的阻抗研究所阐明的。从低的质子跳跃活化能，导电机制被发现的Grotthuss时尚。通过磷酸盐配体的旋转促进跳跃，磷酸盐配体以适当的间隔在层上排列。
We synthesized a coordination polymer consisting of Zn2+, 1,2,4-triazole, and orthophosphates, and demonstrated for the first time intrinsic proton conduction by a coordination network. The compound has a two-dimensional layered structure with extended hydrogen bonds between the layers. It shows intrinsic proton conductivity along the direction parallel to the layers, as elucidated by impedance studies of powder and single crystals. From the low activation energy for proton hopping, the conduction mechanism was found to be of the Grotthuss fashion. The hopping is promoted by rotation of phosphate ligands, which are aligned on the layers at appropriate intervals.