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Facile Synthesis of Linear and Hyperbranched Ladder Poly( p ‐Phenylene)s without Structural Defects
Author(s) -
Bai Libin,
Li Dongzhi,
Lu Huan,
Wu Yonggang,
Ba Xinwu,
Bo Zhishan
Publication year - 2012
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201200376
Subject(s) - polymer , thermal stability , condensation polymer , materials science , polymer chemistry , phenylene , absorption (acoustics) , alkylation , poly(p phenylene) , catalysis , chemistry , composite material , organic chemistry
Linear and hyperbranched ladder polymers are facilely synthesized by a Pd 0 ‐catalyzed Suzuki polycondensation and Friedel–Crafts alkylation. The polymers show blue light emission with typical features of ladder polymers, such as well‐resolved absorption and emission spectra, and small Stokes shifts. The polymers contain fewer structural defects and they exhibit good optical and thermal stability. No spectral change is observed after the films of ladder polymers are heated at 110 °C in air for 24 h.