Study of Stability and Proton Conductivity of Zn‐based Metal–Organic Framework

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Among the various types of solid‐state proton conductors (SSPCs), metal–organic frameworks (MOFs) have emerged as significant importance in the field of proton‐exchange membrane fuel‐cell (PEMFCs) applications. Herein, we have synthesized a three‐dimensional trinuclear zinc‐based metal–organic framework, denoted as Zn‐SDC‐MOF by modification of reported synthetic conditions, where stilbenedicarboxylic acid (H2SDC) and 4,4′‐bipyridine (bpy) are employed as an organic linker unit. With motivation of air stable trinuclear Zn‐SDC MOFs, we have analyzed the water stability behavior of this compound. It resulted in exceptional water stability performance over 3 weeks as confirmed by powder X‐ray diffraction (PXRD) analysis. Moreover, this MOF compounds have shown modest proton conductive performance of 0.8 × 10−3 S cm−1, at 95% relative humidity (RH) and 298 K.