One-dimensional Imidazole Aggregate in Aluminium Porous Coordination Polymers with High Proton Conductivity

Overview

Journal Nat Mater

Date 2009 Sep 8

PMID 19734885

Citations 49

Authors

Sareeya Bureekaew

Satoshi Horike

Masakazu Higuchi

Motohiro Mizuno

Takashi Kawamura

Daisuke Tanaka

Nobuhiro Yanai

Susumu Kitagawa

Affiliations

Soon will be listed here.

Abstract

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 degrees C. The dynamics of the adsorbed imidazole strongly affect the conductivity determined by (2)H solid-state NMR. Isotope measurements of conductivity using imidazole-d4 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.

Citing Articles

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