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- W4378192454 abstract "The development of molecular proton conductors has garnered considerable attention owing to their potential for use as solid-state electrolytes for fuel cells. Creating hydrogen-bonding networks between HIm (imidazole) and carboxylate is an attractive approach for constructing efficient proton conducting pathways. Herein, high proton conduction in a new hydrogen-bonded molecular crystal of [RuII(HIm)6](Glu)·4H2O (1·4H2O, H2Glu = glutaric acid) is demonstrated. 1·4H2O exhibited a proton conductivity of 1.33 × 10−4 S cm−1 at 318 K and 100% relative humidity. This is attributed to a three-dimensional (3D) hydrogen-bonding network via hydrogen-bonding between HIm and carboxylate group and water molecules, leading to produce a one-dimensional (1D) hydrogen-bonding water chain, which provides a proton conducting pathway. The calculated activation energy (Ea) value was 0.38 eV at 283–318 K, suggesting that proton transport in 1·4H2O is associated with the Grotthuss mechanism. The hydrogen-bonding networks between HIm and carboxylate may play a role to promote the proton hopping mechanism. This study will provide new molecular proton conductors using imidazole metal complexes. A high proton conductivity in a hydrogen-bonded molecular crystal constructed using a hexaimidazole ruthenium(II) complex and glutarate was demonstrated. The construction of a three-dimensional (3D) hydrogen-bonding network via hydrogen-bonding between imidazole and carboxylate group and water molecules led to produce a one-dimensional (1D) hydrogen-bonding water chain, which provides a proton conducting pathway." @default.
- W4378192454 created "2023-05-26" @default.
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- W4378192454 date "2023-07-15" @default.
- W4378192454 modified "2023-10-18" @default.
- W4378192454 title "Proton Conduction through Water Chain in a Hydrogen-Bonded Molecular Crystal of Hexaimidazole Ruthenium(II) Complex and Dicarboxylate" @default.
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- W4378192454 doi "https://doi.org/10.1246/bcsj.20230046" @default.
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