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

TitleWater mediated proton conductance in a hydrogen-bonded Ni(II)-bipyridine-glycoluril chloride self-assembled framework
Publication TypeJournal Article
Year of Publication2018
AuthorsTayade, SB, Bhat, SS, Illathvalappil, R, Dhavale, VM, Kawade, VA, Kumbhar, AS, Kurungot, S, Näther, C
JournalCrystEngComm
Volume20
Issue8
Pagination1094-1100
Date PublishedJAN
Type of ArticleJournal Article
ISSN14668033
Abstract

<div class="capsule__text" style="margin: 8px 0px; color: rgba(0, 0, 0, 0.79); font-family: museo_sans300, museo-sans; font-size: 16px; letter-spacing: -0.32px;"><p style="margin-top: 0px;" xmlns="http://www.rsc.org/schema/rscart38">Proton conducting properties have been investigated in a new Ni(<small>II</small>)-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 &times; 10<small><span style="vertical-align: baseline; position: relative; top: -0.4em;">&minus;4</span></small>&nbsp;S cm<small><span style="vertical-align: baseline; position: relative; top: -0.4em;">&minus;1</span></small>&nbsp;at 95 &deg;C and 95% RH with a low activation energy (<em>E</em><small><span style="vertical-align: baseline; position: relative; bottom: -0.4em;">a</span></small>) 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.</p><div>&nbsp;</div></div><p>&nbsp;</p>

DOI10.1039/c7ce01814b
Type of Journal (Indian or Foreign)

Foreign

Impact Factor (IF)

<p>3.474</p>

Divison category: 
Physical and Materials Chemistry

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