Water stable oxalate-based coordination polymers with in situ generated cyclic dipeptides showing high proton conductivity†
Abstract
Presented here are two water stable oxalate-based coordination polymers with in situ generated cyclic dipeptides, namely, (C12H16N6O2)[Zn2(C2O4)3] (SCU-63) and Mn(C2O4)(C12H14N6O2) (SCU-66). SCU-63 has a honeycomb-like layer intercalated with protonated cyclic dipeptide cations. SCU-66 has a diamondoid framework containing cyclic dipeptide ligands. The two compounds show high proton conductivity on the order of 10−3 S cm−1 at 85 °C under 98% relative humidity.