Evolution of Copolymers of Epoxides and CO₂: Catalysts, Monomers, Architectures, and Applications

Chemical Reviews, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 25, 2024

The copolymerization of CO

Language: Английский

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Rational Optimization of Ammonium and Phosphonium Cations of Bifunctional Organoborane Catalysts for Copolymerization of Propylene Oxide with CO₂ to Afford Poly(propylene carbonate)

Macromolecules, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 20, 2024

Language: Английский

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Oxygen Inhibition Suppression by Photoinduced Electron Transfer in Oxime Ester/Triarylalkylborate Photoinitiators

Macromolecules, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 15, 2025

Free radical photopolymerization, a pivotal technology in materials processing, is extensively utilized for radiation curing and micro/nanoscale patterning. Yet, it commonly suffers from oxygen inhibition, which diminishes curability submicron films degrades performance. To address this issue, we develop novel class of (Z)-2-((Z)-2-(hydroxyimino)thiophen-3(2H)-ylidene)-2-(o-tolyl)acetonitrile-derived oxime esters (OXEs) formulate hybrid photoinitiators by blending these OXEs with tetrabutylammonium butyltriphenylborates. Acting as electron acceptors donors, respectively, OXEs, along butyltriphenylborates, enable photoinduced transfer, leading to the formation triphenylborane n-butyl radicals. The resultant reacts or peroxyl radicals, generating radicals initiating activity preserving antioxygen inhibition capability throughout photopolymerization process. Under LED@405 nm light curing, significantly outperform commercial diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide, achieving up 85% retention cured acrylate resins air compared only 8% initiator. This OXE/triarylalkylborate system presents an exceptional photoinitiation ability, showcasing potential widespread use photopolymerization.

Language: Английский

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Dual Kinetic Control of Polycarbonate Sequences via Breaking Catalysis Symmetry Using Dual Biomimetic Organoboron Catalysts

Macromolecules, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 17, 2025

Biomimetic catalysis is extensively used in chemical synthesis targeting to achieve satisfactory reactivities. However, artificial catalysts possessing outstanding sequence controllability over macromolecular structures that could be precisely achieved nature remain scarce, especially the preparation of complex macromolecules featuring kinetically trapped structures. Herein, we report a dual biomimetic catalyst design for precise regulation controlled CO2/epoxide copolymerization. The as-synthesized dissymmetric organoboron possess microenvironments, which differentiate transfer rates polymer alkoxy anions between two boron centers, thus enabling regulation. Consequently, high −ABB–/–AB– ratio 92% was achieved, up 3.3 times analogous symmetric (Nat. Synth. 2022, 1, 892–901). Detailed mechanistic studies reveal kinetic modulations are responsible This tactic should inspire effective designs transformations.

Language: Английский

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Zinc-Catalyzed Carbon Dioxide Based Biodegradable Polycarbonate Synthesis

Synthesis, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 12, 2025

Abstract Carbon dioxide based degradable polycarbonate can be obtained through the copolymerization reaction of carbon with epoxide in presence a catalyst. This polymer has attracted much attention recent years owing to its environmentally friendly and sustainable characteristics, excellent material properties. Due unique properties, CO2-based wide range applications many fields such as electronic electrical parts, automotive medical devices, aerospace equipment, power radiation protection products. Therefore, numerous catalytic systems have been explored for CO2/epoxide process, which zinc catalyst longest history greatest variety. In this short review, significant advances catalysts transformation CO2 are demonstrated, covering both heterogeneous homogeneous catalysts. Moreover, benefits drawbacks system described, outlook large-scale industrial applicati ons future is also represented. 1 Introduction 2 Heterogeneous Zinc Catalysts 3 Homogeneous 4 Overview 5 Conclusion

Language: Английский

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Harnessing Borane-Potassium Cooperativity for Sulfurated Ring-Opening Copolymerisation

Green Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Catalysts combining commercial borane Lewis acids and potassium acetate complexes achieve the selective ring-opening copolymerization (ROCOP) of oxetanes with diverse sulfur-containing monomers.

Language: Английский

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Ring-closing-opening Copolymerization of Phthalaldehyde and Epoxide towards Acid-degradable Polyether and Polyurethane

Chinese Journal of Polymer Science, Journal Year: 2025, Volume and Issue: unknown

Published: March 4, 2025

Language: Английский

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Clusterization-triggered room-temperature phosphorescent synthetic polymeric materials

Coordination Chemistry Reviews, Journal Year: 2025, Volume and Issue: 535, P. 216629 - 216629

Published: March 28, 2025

Language: Английский

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One-Step Hybrid Block Copolymerization by Organocatalysis

Progress in Polymer Science, Journal Year: 2025, Volume and Issue: unknown, P. 101955 - 101955

Published: March 1, 2025

Language: Английский

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Using Differential Scanning Calorimetry to Accelerate Polymerization Catalysis: A Toolkit for Miniaturized and Automated Kinetics Measurements

ACS Catalysis, Journal Year: 2025, Volume and Issue: unknown, P. 6760 - 6771

Published: April 11, 2025

Language: Английский

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