Straightforward Loading of Imidazole Molecules into Metal-Organic Framework for High Proton Conduction

Yingxiang Ye; Weigang Guo; Lihua Wang; Ziyin Li; Zhengju Song; Jun Chen; Zhangjing Zhang; Shengchang Xiang; Banglin Chen

doi:10.1021/jacs.7b09163

Straightforward Loading of Imidazole Molecules into Metal-Organic Framework for High Proton Conduction

J Am Chem Soc. 2017 Nov 8;139(44):15604-15607. doi: 10.1021/jacs.7b09163. Epub 2017 Oct 31.

Authors

Yingxiang Ye¹, Weigang Guo¹, Lihua Wang¹, Ziyin Li¹, Zhengju Song¹, Jun Chen¹, Zhangjing Zhang¹, Shengchang Xiang¹, Banglin Chen^{1

2}

Affiliations

¹ Fujian Provincial Key Laboratory of Polymer Materials, College of Chemistry and Materials Science, Fujian Normal University , 32 Shangsan Road, Fuzhou 350007, People's Republic of China.
² Department of Chemistry, University of Texas at San Antonio , One UTSA Circle, San Antonio, Texas 78249-0698, United States.

PMID: 29072912
DOI: 10.1021/jacs.7b09163

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.

Publication types

Research Support, Non-U.S. Gov't