%0 Journal Article
%T Hyperbranched polymer-cored star polyfluorenes as blue light-emitting materials
%A Yang Han
%A MingHao Sun
%A ZhuPing Fei
%A ZhiShan Bo
%J Chinese Science Bulletin
%@ 1861-9541
%D 2008
%I 
%R 10.1007/s11434-008-0356-8
%X Hyperbranched polymer-cored star polyfluorenes with high molecular weights and narrow molecular weight distribution were prepared by palladium-catalyzed one-pot Suzuki polycondensation of multi-functional cores and an AB-type monomer. The optical, electrochemical and thermal properties of the hyperbranched polymer-cored star polymers were investigated. These polymers exhibited good thermal and color stability in solid state, and there was no significant blue-green emission after the polymers had been annealed in air for 2.5 h. Their three-dimensional hyperbranched structures could effectively reduce the aggregation of the peripheral rigid linear conjugated polyfluorene chains.
%K hyperbranched polymer
%K light-emitting diodes (LED)
%K polyfluorenes
%K star polymer
%K Suzuki polycondensation
%U http://link.springer.com/article/10.1007/s11434-008-0356-8