A water stable layered Tb(iii) polycarboxylate with high proton conductivity over 10−2 S cm−1 in a wide temperature range

Abstract

An unprecedented Tb(III) polycarboxylate, {[Tb₄(TTHA)₂(H₂O)₄]·7H₂O}_n (1), has been synthesized. It possesses an efficient proton transfer pathway formed by water molecules and carboxyl groups, which exhibits proton conductivity over 10⁻² S cm⁻¹ at 295–358 K and 98% relative humidity.