Behavior of the heterogeneous electron-transfer rate constants of arenes and substituted anthracenes in room-temperature ionic liquids

Stephen R. Belding, Neil V. Rees, Leigh Aldous, Christopher Hardacre, Richard G. Compton

    Research output: Contribution to journalArticlepeer-review

    Abstract

    We report the anodic oxidation of several arenes and anthracenes within room-temperature ionic liquids (RTILs). In particular, the heterogeneous electron-transfer rates (k0) for substituted anthracenes and arenes are also investigated in 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C2mim][NTf2]) and found not to obey the outer-sphere Marcus-type behavior of these compounds in contrast to the behavior in traditional organic solvents, in particular the predictions for k0 with molecular size and solvent static dielectric constant. To obtain the electron-transfer rate for 9-phenylanthracene, the dimerization and heterogeneous electron-transfer kinetics of its electrogenerated radical cations is studied in [C2mim] [NTf 2] and eight other RTILs and are both found to be largely independent of the solution viscosity.

    Original languageEnglish
    Pages (from-to)1650-1657
    Number of pages8
    JournalJournal of Physical Chemistry C
    Volume112
    Issue number5
    DOIs
    Publication statusPublished - 7 Feb 2008

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