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

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 wh...

Full description

Saved in:
Bibliographic Details
Published in:CrystEngComm 2018, Vol.20 (8), p.1094-1100
Main Authors: Tayade, Sakharam B., Bhat, Satish S., Illathvalappil, Rajith, Dhavale, Vishal M., Kawade, Vitthal A., Kumbhar, Avinash S., Kurungot, Sreekumar, Näther, Christian
Format: Article
Language:English
Subjects:
Channels
Chemical bonds
Chloride ions
Hydrogen
Hydrogen bonding
Molecular structure
Protons
Resistance
Self-assembly
Temperature dependence
Water chemistry
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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 ( E a ) 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.
ISSN:1466-8033
1466-8033
DOI:10.1039/C7CE01814B