Wang Zhiliu
2006
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Journal
Acta Polymerica Sinica
Abstract
Two optically active polybinaphthyls P-1 and P-2 were synthesized by(R)-3,3′-diiodo-2,2′-bisbutoxy-1,1′-binaphthyl((R)-M-1) and(R)-6,6′-dibromo-2,2′-bisbutoxy-1,1′-binaphthyl((R)-M-2) with 1,4-divinyl-2,3-bisbutoxy-naphthalene(M-3) via Heck coupling reaction catalyzed by PdAc_2,respectively.Their structure and properties were characterized by NMR,GPC,FT-IR,UV,circular dichrosim(CD),fluorescent spectroscopy and thermal analysis.The butoxy substitutents on naphthyl and binaphthyl rings as side chains of the polymers can improve their solubility in organic solvents and make them easy to be processed as electro-optical sensors.Both polymers show high thermal stability and have strong blue fluorescence due to the efficient energy migration from the extended π-electronic structure of the polymers to the chiral binaphthyl core.Photoluminesence efficiencies(Φ_(PL)) of P-1 and P-2 are 0.42 and 0.48,and they are expected to be used as blue-green emitting polymer materials.