Spiro-bridged ladder-type poly(p-phenylene)s: towards structurally perfect light-emitting materials.
Structurally perfect spiro-bridged ladder-type poly(p-phenylene)s, which show blue fluorescence in the photoluminescence (PL) and electroluminescence (EL) emission spectra, are prepared by Suzuki-Miyaura polycondensation and Friedel-Crafts cyclization. The polymers are free of ketonic defects, exhibiting excellent thermal and color stability upon annealing in air at 110 degrees C for 24 h.
Wu
Yonggang
Y
Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, CAS, Beijing 100080, China.
Zhang
Jianyuan
J
Fei
Zhuping
Z
Bo
Zhishan
Z