Journal Article10.1002/ange.202218248
Arbitrarily-Regulated Monomer Sequence in Multi-Block Copolymers Synthesis by Frustrated Lewis Pairs.
Yi Wan,Jianping He,Yuetao Zhang +2 more
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TL;DR: In this paper , a Lewis pair composed of organophosphorus superbase and bulky organoaluminum was employed to copolymerize the mixture of methacrylate, cyclic acrylate and two acrylates into well-defined di-, tri-, tetra- and even a hepta-BCP in one-pot one-step manner.
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Abstract: Rapid access to sequence-controlled multi-block copolymers (multi-BCPs) remains as a challenging task in the polymer synthesis. Here we employ a Lewis pair (LP) composed of organophosphorus superbase and bulky organoaluminum to effectively copolymerize the mixture of methacrylate, cyclic acrylate, and two acrylates, into well-defined di-, tri-, tetra- and even a hepta-BCP in one-pot one-step manner. The combined livingness, dual-initiation and CSC feature of Lewis pair polymerization enable us to achieve not only a trihexaconta-BCP with the highest record in 8 steps by using four-component monomer mixture as building blocks, but also the arbitrarily-regulated monomer sequence in multi-BCP, simply by chaing the composition and adding order of the monomer mixtures, thus demonstrating the powerful capability of our strategy in improving the efficiency and enriching the composition of multi-BCP synthesis.
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Citations
Synthesis of Multiblock Bottlebrush Copolymers with Well-Defined Arbitrary Monomer Sequences: Key Factors Influencing Catalytic Stability
Bangbang Wang,Yuanyuan Mi,Bin Wang,Li Pan,Yuesheng Li,Dongpo Song +5 more
TL;DR: Researchers synthesized multiblock bottlebrush copolymers with well-defined, long sequences using programmable living ring-opening metathesis polymerization, achieving rapid chain propagations and long catalytic lifetimes under optimal conditions.
2
Frustrated Lewis Pair-Promoted Organocatalytic Transformation of Hydrosilanes into Silanols with Water Oxidant
Fuyu Xie,Sutao Zhang,Mo Yang,Jianghua He,Shuhua Li,Yuetao Zhang +5 more
TL;DR: Researchers developed a frustrated Lewis pair-promoted organocatalytic method to convert hydrosilanes into silanols using water as an oxidant, overcoming challenges in silanol preparation and offering a sustainable alternative to traditional methods.
2
Anionic or Radical Polymerization Catalyzed by Metal Triflate-Based Lewis Pairs: A Comprehensive Mechanistic Study
Riki Akita,Mayo Horibe,Katsuhiro Yamamoto,Shin-ichi Matsuoka +3 more
TL;DR: Metal triflates with PPh3 catalyze anionic or radical polymerization of polar vinyl monomers, with early transition metals favoring anionic and late transition metals favoring radical polymerization, and main group metals exhibiting solvent-dependent behavior.
2
Living/controlled polymerization of vinylpyridines into sequence-regulated copolymers by Lewis pair
Qiankun Ding,Wuchao Zhao,Fukuan Li,Jianghua He,Yuetao Zhang +4 more
Frustrated Radical Pair‐Initiated Hydrodehalogenation of Alkyl and Aryl Halides Under Visible Light
Fuyu Xie,Jianping He,Yuetao Zhang +2 more
TL;DR: Frustrated radical pair-initiated hydrodehalogenation of alkyl and aryl halides under visible light successfully generates stannane radicals to facilitate halogen-atom transfer and hydrodehalogenation reaction under mild conditions.
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