Abstract
Control of interpenetration degree of the metal–organic frameworks (MOFs) can be a wise tactic to enhance their proton-conductivities. Two anionic MOFs, [(CH3)2NH2][In(L)]·2.5DMF·2H2O (FJU-16) and [(CH3)2NH2][In(L)]·4.5DMF·16H2O (FJU-17) (H4L= 4,4′,4″,4‴-(1,4-phenylenbis(pyridine-4,2,6-triyl))-tetrabenzoic acid), with different degrees of interpenetration have been synthesized. The resulting 2-fold interpenetrated FJU-17 shows a higher intrinsic proton-conductivity (1.08 × 10–2 S/cm, 100 °C) and wider performing temperature range (−40 to 100 °C) under the conditions of without additional humidity than the 4-fold interpenetrated FJU-16, owing to the more available void space and abundant guest molecules in FJU-17.
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