title: Azadipyrromethene-based conjugated oligomers with near-IR absorption and high electron affinity.
abstract: Solution-processable conjugated oligomers incorporating red-light absorbing azadipyrromethenes (aza-DIPY) within the main chain were synthesized via palladium-catalyzed Sonogashira coupling reactions. Thin films of these compounds absorbed light up to ∼1000 nm and displayed reversible reductions as ascertained by cyclic voltammetry experiments. Reactions with trifluoroboron etherate yielded materials displaying a unique combination of good solubility in organic solvents, low optical band gaps (∼1.3 eV), and high electron affinity (∼4.5 eV).
authors.affiliation: Department of Chemistry, Case Western Reserve University, Cleveland, Ohio 44106, USA.
authors.forename: Lei
authors.initials: L
authors.lastname: Gao
authors.forename: Wasana
authors.initials: W
authors.lastname: Senevirathna
authors.forename: Geneviève
authors.initials: G
authors.lastname: Sauvé