末端含蓝光发色团的超支化聚苯材料的合成

在聚合物发光材料研究领域中，作为三元色之一的蓝色发光材料的设计与合成倍受关注．一维线型结构的聚对苯及聚烷基芴等是典型的蓝色发光材料；线型结构的聚对亚苯亚乙烯基(PPV)及聚对亚苯亚乙炔基(PPE)具有电子流动性好，在溶液中有高荧光量子效率也可衍生得到蓝色发光材料，这主要是在共轭聚合物主链上嵌入非共轭部分，

SYNTHESIS OF HYPERBRANCHED POLYPHENYLENES WITH BLUE-LIGHT EMITTING FLUOROPHORES ON THEIR PERIPHERY

One\|pot”reaction of 1,3,5 tribromobenzene with nonylmagnesium bromide,prepared by 1\|bromononane with magnesium in THF,catalyzed by Ni(PPh\-3)\-2Cl\-2,was used to obtain hyperbranched polyphenylene 1.The macromolecule was characterized by GPC with molecular weight M n=4247 and polydispersity PD =1 36.Under the conditin of Heck reaction catalyzed by palladium\|complexes,the terminal bromine groups on this macromolecule coupled with styrene and phenylacetylene,respectively,to provide correspondign hyperbranched polyphenylene 2 and 3 with stilbenyl and diphenylacetyl fluorophores on their surface.These two polymers both exhibited two bands E\-1 and E\-2 at near 260 nm and 300 nm in their UV spectra.In their powder photoluminescence spectra,the maximum emitting peaks at 401 nm and 386 nm in the range of blue luminescence were observed,respectively.