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Issue 8, 2018
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Water mediated proton conductance in a hydrogen-bonded Ni(ii)-bipyridine-glycoluril chloride self-assembled framework

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Abstract

Proton conducting properties have been investigated in a new Ni(II)-based hydrogen-bonded porous framework synthesized using a urea-fused bipyridine-glycoluril (BPG) tecton. This hydrogen-bonded self-assembled structure encapsulates water molecules in the channels with hydrogen-bonding networks which exhibits a significant temperature dependent proton conductance of 1.5 × 10−4 S cm−1 at 95 °C and 95% RH with a low activation energy (Ea) of 0.54 eV, implying a Grotthuss proton hopping mechanism mediated by hydrogen-bonded water molecules in the channels. In addition, this framework exhibited a very high water uptake under humid conditions. A continuous array of water molecules and chloride ions embedded in the highly hydrophilic porous channels of the hydrogen-bonded framework acts as the proton conducting medium.

Graphical abstract: Water mediated proton conductance in a hydrogen-bonded Ni(ii)-bipyridine-glycoluril chloride self-assembled framework

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Article information


Submitted
17 Oct 2017
Accepted
18 Jan 2018
First published
19 Jan 2018

CrystEngComm, 2018,20, 1094-1100
Article type
Paper

Water mediated proton conductance in a hydrogen-bonded Ni(II)-bipyridine-glycoluril chloride self-assembled framework

S. B. Tayade, S. S. Bhat, R. Illathvalappil, V. M. Dhavale, V. A. Kawade, A. S. Kumbhar, S. Kurungot and C. Näther, CrystEngComm, 2018, 20, 1094
DOI: 10.1039/C7CE01814B

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