1. Straightforward Loading of Imidazole Molecules into Metal-Organic Framework for High Proton Conduction
- Author
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Ziyin Li, Zhangjing Zhang, Shengchang Xiang, Weigang Guo, Zhengju Song, Lihua Wang, Yingxiang Ye, Jun Chen, and Banglin Chen
- Subjects
Hydrogen ,Chemistry ,Inorganic chemistry ,chemistry.chemical_element ,02 engineering and technology ,General Chemistry ,Conductivity ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Thermal conduction ,01 natural sciences ,Biochemistry ,Catalysis ,0104 chemical sciences ,chemistry.chemical_compound ,Crystallography ,Colloid and Surface Chemistry ,Proton transport ,Imidazole ,Molecule ,Metal-organic framework ,0210 nano-technology ,Single crystal - Abstract
A one-step straightforward strategy has been developed to incorporate free imidazole molecules into a highly stable metal-organic framework (NENU-3, ([Cu12(BTC)8(H2O)12][HPW12O40])·Guest). The resulting material Im@(NENU-3) exhibits a very high proton conductivity of 1.82 × 10-2 S cm-1 at 90% RH and 70 °C, which is significantly higher than 3.16 × 10-4 S cm-1 for Im-Cu@(NENU-3a) synthesized through a two-step approach with mainly terminal bound imidazole molecules inside pores. Single crystal structure reveals that imidazole molecules in Im-Cu@(NENU-3a) isolate lattice water molecules and then block proton transport pathway, whereas high concentration of free imidazole molecules within Im@(NENU-3) significantly facilitate successive proton-hopping pathways through formation of hydrogen bonded networks.
- Published
- 2017