Regio- and stereoselective polymerization of diynes with inorganic comonomer: a facile strategy to conjugated poly(p-arylene dihalodiene)s with processability and postfunctionalizability
journal contributionposted on 2018-10-05, 09:14 authored by Qingqing Gao, Zijie Qiu, Mark ElsegoodMark Elsegood, Ming Chen, Jianguo Wang, Ryan T. Kwok, Jacky W.Y. Lam, Ben Zhong Tang
Copyright © 2018 American Chemical Society. Development of new methodologies for synthesizing polymers with novel structures and unique properties is a fundamentally important area in polymer science. Herein, a novel synthetic strategy to conjugated poly(p-arylene dihalodiene)s (PADs) with high regio- and stereoselectivity was developed. In the presence of PdBr 2 and CuBr 2 , the polymerizations of terminal alkynes proceeded smoothly in air without heating to generate PADs in high yields (up to 95.3%) with high molecular weights (M w up to 915 900). Low-cost inorganic CuBr 2 played dual roles as cocatalyst and comonomer. The PADs possessed good solubility and film-formi ng ability. Their thin films exhibited high refractive indices (1.7149-1.7245) and would be fabricated into well-resolved fluorescent photopatterns by photolithography. Thanks to the vinyl bromine functionality, the PADs could undergo efficient postmodification to afford polymers with more sophisticated structures and applications. ©
This work has been partially supported by the National Science Foundation of China (21788102, 21490570, and 21490574), the Research Grant Council of Hong Kong (16308116, 16303815, C2014-15G, C6009-17G, and A-HKUST605/16), the Innovation and Technology Commission (ITCCNERC149C01), and the Science and Technology Plan of Shenzhen (JCYJ20160229205601482).