Enhanced proton conductivity of a MOF-808 framework through anchoring organic acids to the zirconium clusters by post-synthetic modification

Abstract

The modified MOF-808 frameworks MOF-808-EDTA/OX show better proton conduction behaviours than the original framework. A high proton conductivity (1.94 × 10⁻⁴ S cm⁻¹) of MOF-808-OX can be obtained at 30 °C and 98% relative humidity. This is the first example where proton conductivity is tuned by modifying the metal cluster-based nodes via a post-synthetic modification method.