Tuning the Frontier Molecular Orbitals of Aromatic Radicals via Chalcogen Substitution and Heterocyclic Stabilization
Due to the intrinsic electron-donating effect of chalcogen lone pairs to the aromatic rings, well-characterized radicals, including phenoxy and thiophenoxy, demonstrate that sulfur substitution for oxygen generally raises the electron affinity (EA). Here we report a counterintuitive reversal using high-resolution pho...