02273nas a2200229 4500008004100000022001300041245012200054210006900176260000800245300001400253490000700267520144600274100002501720700002101745700002701766700002401793700002401817700002501841700002401866700002301890856013001913 2018 eng d a1466803300aWater mediated proton conductance in a hydrogen-bonded Ni(II)-bipyridine-glycoluril chloride self-assembled framework0 aWater mediated proton conductance in a hydrogenbonded NiIIbipyri cJAN a1094-11000 v203 a

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.

 

 

1 aTayade, Sakharam, B.1 aBhat, Satish, S.1 aIllathvalappil, Rajith1 aDhavale, Vishal, M.1 aKawade, Vitthal, A.1 aKumbhar, Avinash, S.1 aKurungot, Sreekumar1 aNäther, Christian uhttps://library.ncl.res.in/content/water-mediated-proton-conductance-hydrogen-bonded-niii-bipyridine-glycoluril-chloride-self