Electronic structure design for nanoporous, electrically conductive zeolitic imidazolate frameworks

Keith T. Butler, Stephen D. Worrall, Christopher D. Molloy, Christopher H Hendon, Martin P. Attfield, Robert A.W. Dryfe, Aron Walsh

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Electronic structure calculations are used to develop design rules for enhanced electrical conductivity in zeolitic imidazolate frameworks. The electrical resistivity of Co2+ based zeolitic imidazolate frameworks has previously been found to be ∼1000 times lower than that of Zn2+ based materials. The electrical conductivity of the frameworks can also be tuned by ligand molecule selection. Using density functional theory calculations, this controllable electrical conductivity is explained in terms of tuneable conduction band edge character, with calculations revealing the improved hybridisation and extended band character of the Co2+ frameworks. The improvements in the methylimidazolate frameworks are understood in terms of improved frontier orbital matching between metal and ligand. The modular tuneability and previously demonstrated facile synthesis provides a route to rational design of stable framework materials for electronic applications. By outlining these design principles we provide a route to the future development of stable, electrically conductive zeolitic imidazolate frameworks.

    Original languageEnglish
    Pages (from-to)7726-7731
    Number of pages6
    JournalJournal of Materials Chemistry C
    Volume5
    Issue number31
    Early online date1 Aug 2017
    DOIs
    Publication statusPublished - 2017

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