Proton conductivity and dielectric anomalies in a chain-based metal–organic framework with a hydrogen-bonded network of [SO3] groups, pyrazine and water molecules

Abstract

We report a chain-based multifunctional MOF featuring an extensive hydrogen-bonded network composed of coordinated/uncoordinated water, 2,7-NDS, and py molecules. This compound exhibits a proton conductivity of 6.03 × 10⁻⁶ S cm⁻¹ at 60 °C under 95%RH. It also shows two distinct dielectric anomaly behaviors arising from thermally induced guest molecule loss and structural reorganization, respectively.