Site-Specifically Initiated Controlled/Living Branching Radical Polymerization: A Synthetic Route toward Hierarchically Branched Architectures

Li, Feng; Cao, Mengxue; Feng, Yujun; Liang, Ruiqi; Fu, Xiaowei; Zhong, Mingjiang

doi:10.1021/jacs.8b12433

Cited by 58 publications

(67 citation statements)

References 69 publications

(36 reference statements)

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“…The modification strategy is highly tunable in types of functional groups, and multiple components are straightforwardly incorporated by virtue of delicate combination of widely used organic reactions (e.g., esterification, substitution and "click" reactions) [125][126][127][128] and controlled radical polymerization techniques (e.g., atom transfer radical polymerization, ATRP, or reversible addition-fragmentation chain transfer, RAFT). [129][130][131][132][133][134][135][136][137][138][139][140][141] Therefore, the pore surface chemistry can be subsequently changed, and pore size control is also attainable. For example, meticulous redox-active energetic COF were designed via "click" functionalization on the porous skeleton.…”

Section: Introductionmentioning

confidence: 99%

Emerging Functional Porous Polymeric and Carbonaceous Materials for Environmental Treatment and Energy Storage

Zheng

Lin

Zhang

et al. 2019

Adv Funct Materials

197

118

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The demand for practical and cost-effective environmental treatment and energy storage materials is exploding. Porous polymeric and carbonaceous materials have attracted tremendous interest on account of their welldeveloped porosity and tunable surface chemistry. Functionalization of pore structures further enhances their properties for environmental treatment and energy storage. Herein, the procedures for functionalization of porous structures are introduced, including predesign and postsynthetic strategies. Subsequently, the important advancements of emerging porous polymers for environmental treatment in sorption (e.g., organic micropollutant adsorption, heavy metal ion removal, radionuclide extraction, and oil absorption) and membrane separation (e.g., aqueous micropollutant separation, organic solvent nanofiltration, desalination and pervaporation), as well as for energy storage ranging from the electrodes and separators of batteries to supercapacitor electrodes are highlighted. Moreover, given the combined merits of high intrinsic conductivity, porosity, and physicochemical stability, novel polymer-based porous carbons for energy storage are also highlighted. Key functionalization chemistry for each application is discussed and an in-depth understanding of the structure-property relationships of these functional porous materials is provided. Finally, the challenges and perspectives of emerging functional porous polymeric and carbonaceous materials for environmental treatment and energy storage are proposed.

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Section: Introductionmentioning

confidence: 99%

Emerging Functional Porous Polymeric and Carbonaceous Materials for Environmental Treatment and Energy Storage

Zheng

Lin

Zhang

et al. 2019

Adv Funct Materials

197

118

View full text Add to dashboard Cite

show abstract

“…Among these highly branched polymers, hyperbranched polymers receive particular interest from both industries and academia because of their one‐pot inexpensive synthesis and retention of arborescent structures. Hyperbranched polymers typically could be produced in one pot via step‐growth polymerization of multifunctional AB m (m ≥ 2) monomers, [ 7–13 ] step‐growth copolymerization of A n and B m monomers (e.g., A 2 + B 3 ), [ 14–16 ] chain‐growth polymerization of AB m (m ≥ 2) monomers, [ 17–19 ] chain‐growth copolymerization of divinyl cross‐linkers, [ 20–26 ] self‐condensing vinyl polymerization (SCVP) of polymerizable initiators (inimers), [ 27–35 ] or polymerizable transfer agents (transmers). [ 36–40 ] It is important to note that any of these methods could produce hyperbranched polymers and randomly branched polymer as their difference lies in the fraction of branching unit incorporated into the polymer backbone.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Hyperbranched Polymers via Metal‐Free ATRP in Solution and Microemulsion

Cuneo

Shi

Gao

2020

Macro Chemistry & Physics

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Atom transfer radical polymerization (ATRP), as one of the most successful controlled radical polymerization techniques, has been broadly used by polymer chemists and nonspecialists for synthesis of various functional materials, although the use of copper as traditional catalyst often results in undesired color or properties. The first homopolymerization of an initiable monomer, that is, inimer, is reported via metal‐free ATRP using 10‐phenylphenothiazine (Ph‐PTH) as photocatalyst in both solution and microemulsion media. Although polymerizations of inimers in both media can be carried out, only the microemulsion polymerization of methacrylate‐based inimer 1 effectively confines the random bimolecular reaction within each segregated latex and produces hyperbranched polymers with high molecular weight and low polydispersity. Several experimental parameters in the microemulsion polymerization of inimer 1 are subsequently studied, including the Ph‐PTH amount, the solids content of microemulsion, and the light source of irradiation. The results not only provide an effective method to tune the structure and molecular weights of hyperbranched polymers in confined‐space polymerization, but also expand the toolbox of using metal‐free ATRP method for synthesizing highly branched polymers in controlled manner.

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“…[4] While linear polymers can be precisely synthesized by RDRP, the preparation of branched polymers [5] exhibits increased difficulty. Recently, the Zhong [6] and Yamago [7] groups reported chain-growth branching polymerization via Cu-and Te-mediated processes, respectively, enabling controlled synthesis of well-defined polystyrene and polyacrylate under thermal conditions. Due to the unselective chemical reactivity between monomer and the dormant C À X bond (e.g., X = Br) in the presence/absence of catalyst, it is challenging for previous RDRP methods to provide different topologies from similar formulations of starting materials.…”

mentioning

confidence: 99%

Photoorganocatalyzed Divergent Reversible‐Deactivation Radical Polymerization towards Linear and Branched Fluoropolymers

Zhao

Lin

et al. 2020

Angew Chem Int Ed

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Topology influences the properties and applications of polymers. Consequently, considerable efforts have been made to control topological structures. In this work, we have developed a photoorganocatalyzed divergent synthetic approach based on reversible-deactivation radical polymerization (RDRP) that enables the preparation of both linear and branched fluoropolymers of low dispersity (), a tunable degree of branching and high chain-end fidelity by exposure to LED light irradiation under metal-free conditions. This method promotes the generation of complicated structures (e.g., necklace-like and mop-like fluoropolymers) via chainextension photo-RDRP, and provides a novel and versatile platform to access fluoropolymer electrolytes with high Li-ion transference number and good ionic conductivity, which should create improved opportunities for advanced material engineering.

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Site-Specifically Initiated Controlled/Living Branching Radical Polymerization: A Synthetic Route toward Hierarchically Branched Architectures

Cited by 58 publications

References 69 publications

Emerging Functional Porous Polymeric and Carbonaceous Materials for Environmental Treatment and Energy Storage

Emerging Functional Porous Polymeric and Carbonaceous Materials for Environmental Treatment and Energy Storage

Synthesis of Hyperbranched Polymers via Metal‐Free ATRP in Solution and Microemulsion

Photoorganocatalyzed Divergent Reversible‐Deactivation Radical Polymerization towards Linear and Branched Fluoropolymers

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