Singlet-diradical character in large PAHs triggers spontaneous-ignition of coal

Mohammednoor Altarawneh, Ibukun Oluwoye, Bogdan Z. Dlugogorski

    Research output: Contribution to journalArticlepeer-review


    Chemical phenomena dictating the spontaneous-ignition of coal remain highly speculative with some of the most intriguing questions appearing unaddressed. In this communication, we deploy a synergistic experimental-theoretical approach to elucidate the definite role of singlet-biradical PAHs in driving the low-temperature oxidation of coal. We establish that, five linearly-fused benzene rings (i.e., pentacene, as a model compound for the PAH content in coal, and an example of short-chain graphene nanoribbons) ignites 200 °C lower than the corresponding temperature for naphthalene.

    Original languageEnglish
    Pages (from-to)279-281
    Number of pages3
    JournalCombustion and Flame
    Publication statusPublished - Feb 2020


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