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Well-defined dendritic oligomers of poly(β,β-dibromo-4-ethynylstyrene) of the first and second generation havebeen synthesized by a stepwise synthesis, and characterized. It was found from n.m.r. analysis and by theoretical calculations that free rotation around formal single bonds is hampered by conjugation. All oligomers were found to be blue emitters with their emission maxima correlating with...
The new monomer β,β-dibromo-4-ethynylstyrene was synthesized and polymerized by the Heck reaction to give a partially soluble, conjugated hyperbranched polymer. The polymer structure was elucidated using standard spectroscopic techniques and with the aid of model compound synthesis. Theoretical calculations using the AM1 method were carried out and they showed that conjugation in the polymer is partially...
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