Open AccessSite‐Selective, Multistep Functionalizations of CO 2 ‐Based Hyperbranched Poly(alkynoate)s toward Functional Polymetric Materials
Author(s) -
Song Bo,
Zhang Rongyuan,
Hu Rong,
Chen Xu,
Liu Dongming,
Guo Jiali,
Xu Xiaotian,
Qin Anjun,
Tang Ben Zhong
Publication year - 2020
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.202000465
Subject(s) - branching (polymer chemistry) , tandem , polymer , amphiphile , ethylene glycol , materials science , combinatorial chemistry , chemistry , polymer chemistry , nanotechnology , chemical engineering , copolymer , organic chemistry , composite material , engineering
Abstract Hyperbranched polymers constructed from CO 2 possess unique architectures and properties; however, they are difficult to prepare. In this work, CO 2 ‐based, hyperbranched poly(alkynoate)s (hb‐PAs) with high molecular weights and degrees of branching are facilely prepared under atmospheric pressure in only 3 h. Because hb‐PAs possess two types of ethynyl groups with different reactivities, they can undergo site‐selective, three‐step functionalizations with nearly 100% conversion in each step. Taking advantage of this unique feature, functional hb‐PAs with versatile properties are constructed that could be selectively tailored to contain hydrophilic oligo(ethylene glycol) chains in their branched chains, on their periphery, or both via tandem polymerizations. Hyperbranched polyprodrug amphiphiles with high drug loading content (44.3 wt%) are also generated, along with an artificial light‐harvesting system with high energy transfer efficiency (up to 92%) and white‐light‐emitting polymers. This work not only provides an efficient pathway to convert CO 2 into hyperbranched polymers, but also offers an effective platform for site‐selective multistep functionalizations toward functional polymeric materials.