Multifunctional Linear and Hyperbranched Five-Membered Cyclic Carbonate-Based Polymers Directly Generated from CO<sub>2</sub> and Alkyne-Based Three-Component Polymerization

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As a new class of functional luminescent materials, polymers with aggregation‐induced emission (AIE) feature attract much attention because of their advantages of efficient solid‐state fluorescence, excellent processability, structural diversity, and multifunctionalities. Among all polymerization methods toward AIE polymers, multicomponent polymerizations (MCPs) exhibit the merits of simple operation, good atom economy, high polymerization efficiency, broad functional‐group tolerance, etc. In this feature article, the recent progress on the development of one‐step MCPs for the synthesis of AIE polymers is highlighted. The representative functionalities of the resulting AIE polymers are illustrated. Perspectives on the challenges and future development directions of this field are also discussed.

Section: One‐step Mcps Of Aiegen‐containing Monomersmentioning

confidence: 99%

One‐Step Multicomponent Polymerizations for the Synthesis of Multifunctional AIE Polymers

Gao

Wang

et al. 2020

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“…[ 26 ] Among all the reported MCPs, multicomponent cyclopolymerization (MCCP), which involves the synthesis of heterocyclic polymers by a one‐pot method, is of great significance. [ 27–32 ] For example, Arndtsen et al. described a metal‐free MCCP to conjugated pyrrole‐containing polymers, which have potential applications in optoelectronic materials.…”

Section: Introductionmentioning

confidence: 99%

Catalyst‐Free Multicomponent Cyclopolymerizations of Diisocyanides, Activated Alkynes, and 1,4‐Dibromo‐2,3‐Butanedione: a Facile Strategy toward Functional Polyiminofurans Containing Bromomethyl Groups

Zhu

Han

et al. 2020

Polymers containing iminofuran (PIFs) are rarely reported due to the lack of simple and effective synthesis methods. In this work, a novel multicomponent cyclopolymerization (MCCP) of diisocyanides, activated alkynes, and 1,4‐dibromo‐2,3‐butanedione using catalyst‐free one‐pot reactions under mild conditions to prepare PIFs containing bromomethyl groups is reported. PIFs with good solubility and thermal stability are obtained with high Mws (up to 19 600) and good yields (up to 89.5%) under optimized polymerization conditions. The structure of the PIFs is characterized by nuclear magnetic resonance, Fourier transform infrared spectroscopy, and gel permeation chromatography. The photophysical properties indicate that polymers P1a2b3 and P1c2b3 have cluster‐triggered emission characteristics. Thin films made from PIFs quickly degrade under UV irradiation. Moreover, the obtained polymers are decorated with bromomethyl and carboxylate groups in the side chain, which can be postfunctionalized to prepare multifunctional materials, such as star branched polymers and biomedical carrier materials. Thus, this work not only enriches the field of polymerization based on isocyanates and activated alkynes but also provides a facile strategy toward functional iminofuran polymers.

“…Qin, Tang and co‐workers developed a MCP of CO 2 , bis(propargylic alcohol)s, and aryl dihalides, through which a kind of five‐membered cyclic carbonate (5CC)‐based polymers with well‐defined structures, high weight‐average molecular weights ( M w up to 42 500) were generated in excellent yield (up to 96%) ( Scheme A). [ 60 ] In situ Fourier transform infrared spectroscopy and the density functional theory calculation indicate that the synergistic reaction effect among CO 2 , bis(propargylic alcohol)s, and aryl dihalides is crucial. Moreover, the 5CC rings of the polymers could be regioselectively opened by amines via efficient catalyst‐free reaction (Scheme 14B).…”

Section: Mcps With Carbon Dioxide As a Comonomermentioning

confidence: 99%

Multicomponent Polymerizations Involving Green Monomers

Wang

Qin

Tang

2020

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Green monomers, such as oxygen (O2), water (H2O), and carbon dioxide (CO2), refer to a kind of natural reagents with abundant, nontoxic, cheap, environmentally friendly, renewable, and sustainable features. These monomers have been used in multicomponent polymerizations (MCPs) toward functional polymers. In this review, the recent development of MCPs involving green monomers of O2‐, H2O‐, and CO2 is summarized. The catalytic systems, polymerization conditions, the molecular weights, and potential applications of resultant polymers are briefly discussed. Furthermore, the existing challenges and the promising opportunities are concisely provided.