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Electronically regulated thermally and light-gated electron transfer from anions to naphthalenediimides
S. Guha, F.S. Goodson, , L.J. Corson, C.A. Gravenmier, S. Saha
Published in
PMID: 21877729
Volume: 133
Issue: 39
Pages: 15256 - 15259
Anion-induced electron transfer (ET) to π-electron-deficient naphthalenediimides (NDIs) can be channeled through two distinct pathways by adjusting the Lewis basicity of the anion and the π-acidity of the NDI: (1) When the anion and NDI are a strong electron donor and acceptor, respectively, positioning the HOMO of the anion above the LUMO of the NDI, a thermal anion → NDI ET pathway is turned ON. (2) When the HOMO of a weakly Lewis basic anion falls below the LUMO of an NDI but still lies above its HOMO, the thermal ET is turned OFF, but light can activate an unprecedented anion → 1*NDI photoinduced ET pathway from the anion's HOMO to the photogenerated 1*NDI's SOMO-1. Both pathways generate NDI •- radical anions. © 2011 American Chemical Society.
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JournalJournal of the American Chemical Society