Azadipyrromethene-based conjugated oligomers with near-IR absorption and high electron affinity |
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Authors: | Gao Lei Senevirathna Wasana Sauvé Geneviève |
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Affiliation: | Department of Chemistry, Case Western Reserve University, Cleveland, Ohio 44106, USA. |
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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). |
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