Journal
NATURE MATERIALS
Volume 8, Issue 10, Pages 831-836Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NMAT2526
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- Japan Science and Technology Agency (JST)
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The development of anhydrous proton-conductive materials operating at temperatures above 80 degrees C is a challenge that needs to be met for practical applications. Herein, we propose the new idea of encapsulation of a proton-carrier molecule-imidazole in this work-in aluminium porous coordination polymers for the creation of a hybridized proton conductor under anhydrous conditions. Tuning of the host-guest interaction can generate a good proton-conducting path at temperatures above 100, C. The dynamics of the adsorbed imidazole strongly affect the conductivity determined by H-2 solid-state NMR. Isotope measurements of conductivity using imidazole-d(4) showed that the proton-hopping mechanism was dominant for the conducting path. This work suggests that the combination of guest molecules and a variety of microporous frameworks would afford highly mobile proton carriers in solids and gives an idea for designing a new type of proton conductor, particularly for high-temperature and anhydrous conditions.
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