title: Facile synthesis of linear and hyperbranched ladder poly(p-phenylene)s without structural defects.
abstract: 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.
authors: College of Chemistry and Environmental Science, Hebei University, Baoding, P. R. China.
authors: Libin
authors: L
authors: Bai
authors: Dongzhi
authors: D
authors: Li
authors: Huan
authors: H
authors: Lu
authors: Yonggang
authors: Y
authors: Wu
authors: Xinwu
authors: X
authors: Ba
authors: Zhishan
authors: Z
authors: Bo
mesh_terms: D000478:Alkylation; D002384:Catalysis; D003516:Cycloparaffins / Q000138:chemical synthesis / Q000737:chemistry*; D010165:Palladium / Q000737:chemistry; D013696:Temperature
chemical_list: D003516:Cycloparaffins; C509547:poly-para-phenylene; D010165:Palladium