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Synthesis and properties of alternating polymers containing 2,6-diaryldithienosilole and organosilicon units
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2000
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EngineeringNickel-complex-catalyzed Dehalogenative CouplingOrganic ChemistryChemistryPolymersConducting PolymerElectronic DevicesOrganic ElectrochemistryProbe MethodHybrid MaterialsPolymer ChemistryMaterials ScienceOrganometallic PolymerElectrochemistryBiomolecular EngineeringDigrignard ReagentsElectronic MaterialsPolymer ScienceOrganosilicon UnitsFunctional PolymerFunctional MaterialsSynthetic ChemistryPolymer Synthesis
Nickel-complex-catalyzed dehalogenative coupling of diGrignard reagents prepared from bis(bromoaryl)disilanes or monosilane with 2,6-dibromodithienosiloles afforded the corresponding polymers composed of alternating 2,6-diaryldithienosilole and organosilicon units. These polymers exhibit strong UV-vis absorption and emission bands at 422–444 and 482–541 nm, respectively. Their cyclic voltammograms display the first oxidation peaks at 0.95–1.00 V vs. SCE (saturated Calomel electrode). When the polymer films were doped with FeCl3 vapor, the films became conducting, and their conductivities were determined to be 3.3×10–5 – 8.7×10–3 S/cm using the four probe method. Electron- and hole-transporting properties of the polymers were also studied by evaluating the performance of electroluminescent (EL) devices based on these polymers.