3 years ago

Effective Approach to Promoting the Proton Conductivity of Metal–Organic Frameworks by Exposure to Aqua–Ammonia Vapor

Effective Approach to Promoting the Proton Conductivity of Metal–Organic Frameworks by Exposure to Aqua–Ammonia Vapor
Minghao Wang, Bin Li, Jing Wang, Gang Li, Ruilan Liu, Xi Liang
We explored the proton conductivities of two 3D CoII metal–organic frameworks (MOFs), {[Co3(m-ClPhIDC)2(H2O)6]·2H2O}n [1; m-ClPhH3IDC = 2-(m-chlorophenyl)imidazole-4,5-dicarboxylic acid] and {[Co3(p-ClPhHIDC)3(H2O)3]·6H2O}n (2; p-ClPhH3IDC = 2-(p-chlorophenyl)imidazole-4,5-dicarboxylic acid), under water and aqua–ammonia vapors, respectively. The experimental results revealed that the proton conductivities of 1 and 2 at aqua–ammonia vapor were 2.89 × 10–2 and 4.25 × 10–2 S/cm, respectively, and approximately 2 orders of magnitude greater than those at water vapor. On the basis of the activation energy, water and ammonia vapor absorption, and powder X-ray diffraction patterns, their proton-conduction mechanisms have been discussed. We believe that this is a novel approach to drastically improving the proton conductivity of MOFs.

Publisher URL: http://dx.doi.org/10.1021/acsami.7b07635

DOI: 10.1021/acsami.7b07635

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