Zinc-Mediated Living Cationic Polymerization DOI
Lin Xia, Qianxi Gu, Jiajia Li

et al.

ACS Macro Letters, Journal Year: 2023, Volume and Issue: 12(12), P. 1692 - 1697

Published: Dec. 1, 2023

Here, we present a facile and robust method for living cationic polymerization using zinc wire as catalyst precursor. Well-defined poly(vinyl ether)s with various molecular weights narrow weight distributions (Đ < 1.10) can be achieved at room temperature. Excellent characteristics were observed in kinetic chain extension experiments. Mechanistic investigations revealed that the was catalyzed by situ generation of trace ions, which is key to under mild conditions. The utilization offers several advantages, including reusability, easy separation low metal residue. Furthermore, extended application this continuous flow polymerization, opening up promising avenue scalable efficient industrial production

Language: Английский

Advancements in Polymer Science: Synthesis, Characterization, and Biomedical Applications of Homopolymers and Copolymers DOI Open Access

Anaif M. Alhewaitey,

Ishrat M. Khan, Emmanuel Ramsey Buabeng

et al.

Open Journal of Polymer Chemistry, Journal Year: 2024, Volume and Issue: 14(03), P. 167 - 198

Published: Jan. 1, 2024

Language: Английский

Citations

2
Perspective on Water-Soluble Two-Photon Initiator for Two-Photon Polymerization DOI

Fan‐Chun Bin,

Mei‐Ling Zheng

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 18, 2024

Two-photon polymerization (TPP) as an unparalleled technology empowers the rapid prototyping of customized three-dimensional (3D) micro/nanostructures, garnering noticeable interest in tissue engineering, drug delivery, and regenerative medicine. These applications have a high requirement on biocompatibility integrity 3D structures. Therefore, it is important to develop two-photon initiator with good water-solubility, initiation efficiency, biocompatibility. Here, we share our insights into development water-soluble (WTPI) from material manufacturing perspective. We highlight nonlinear optical properties synthesis WTPI through three pathways. Then further demonstrate TPP technique aqueous phase fields 4D printing, ceramic manufacturing. Finally, general conclusion outlook are provided for future application WTPI.

Language: Английский

Citations

2
Introduction of Molecular Complexity via the Cross‐Coupling of Lithium 1,4‐Dioxene with Aryl Bromides DOI Creative Commons
Paco Visser, Ben L. Feringa

Chemistry - A European Journal, Journal Year: 2024, Volume and Issue: 30(61)

Published: Aug. 28, 2024

Abstract The synthetic potential of substituted 1,4‐dioxenes is well recognised, although the chemistry 2‐aryl‐1,4‐dioxenes relatively unexplored. Their transition metal‐catalysed synthesis has been limited to Stille‐type cross‐coupling chemistry, typically showing long reaction times, or proceeding at high temperatures. Here we present a facile and general methodology for aryl bromides with lithium 1,4‐dioxene, affording range in generally good yields. We highlight applicability this transformation multigram scale, demonstrate versatility products by conversion dioxene units various carbonyl‐based functionalities. Additionally, concise two‐step an arylated analogue known 1,4‐dioxene‐based antifungal agent.

Language: Английский

Citations

1
Functionalized Polyisobutylene and Polyisobutylene‐Based Block Copolymers by Mechanistic Transformation from Cationic to Radical Process DOI
Yusra Bahar Cakir, Miraslau I. Makarevich,

Mikalai Bohdan

et al.

Macromolecular Chemistry and Physics, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 10, 2024

Abstract The strategy for the preparation of polyisobutylene‐based block copolymers via mechanistic transformation from cationic to radical polymerization is reported. This involves synthesis 2‐bromo‐2‐methylpropanoyl‐terminated difunctional polyisobutylene macroinitiator (BiBB‐PIB‐BiBB) consecutive polymerization, in situ hydroxyl‐terminated and its acylation by 2‐bromo‐2‐methylpropanoyl bromide. Mn 2 (CO) 10 −triggered photo‐induced styrene bulk using this leads formation multiblock copolymer, while predominantly triblock copolymer generated during methyl methacrylate. possibility functionalize pyrene addition 1‐bromomethyl presence also demonstrated work.

Language: Английский

Citations

1
Orthogonal Radical and Cationic Single‐Unit Monomer Insertions for Engineering Polymer Architectures DOI

Ze Wei,

Wei He,

Zhihua Liu

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(31)

Published: May 18, 2024

The single-unit monomer insertion (SUMI), derived from living/controlled polymerization, can be directly functionalized at the end or within chain of polymers prepared by offering potential applications in preparation with complex architectures. Many scenarios demand simultaneous incorporation monomers suitable for different polymerization methods into polymers. Therefore, it becomes imperative to utilize SUMI technologies diverse mechanisms, especially those that are compatible each other. Here, we reported orthogonal technique, seamlessly combining radical and cationic approaches. Through careful optimization transfer agent pairs adjustments reaction conditions, efficiently execute both processes one pot without mutual interference. utilization facilitates integration reversible addition-fragmentation (RAFT) various configurations. This flexibility enables synthesis diblock, triblock, star incorporate cationically radically polymerizable monomers. Moreover, have successfully implemented a mixing mechanism free radicals cations RAFT step-growth resulting creation side-chain sequence-controlled polymer brushes.

Language: Английский

Citations

1
Cationic Polymerization of Vinyl Ethers using Trifluoromethyl Sulfonate/Solvent/Ligand to Access Well-controlled Poly(vinyl ether)s DOI Creative Commons
Liang-Yü Chen, Zhihao Wang,

En Fang

et al.

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

Published: Dec. 9, 2024

Cationic polymerization of vinyl ethers to access poly(vinyl ether) polymeric materials has been challenging due stringent conditions and inevitable chain transfer. Herein we introduce a protocol using trifluoromethyl sulfonates catalyze the series ethers. These are fully commercially available can be stored under ambient conditions. Solvents ligands have profound influences on process, ether)s with different molecular weights, weight distributions, tacticities were obtained. A few combinations sulfonate/solvents/O^O type explored. They showed high activities afforded well-controlled tacticity, which isotacticity up 81%

Language: Английский

Citations

0
Processive Catalytic Polymerization via Molecularly Confined Catalyst DOI Creative Commons
Zefeng Zhou, Wei‐Shang Lo, Gavin J. Giardino

et al.

Published: Dec. 11, 2023

Controlling the reactivity of propagating chain end in polymerization reactions is crucial for achieving well-defined polymers both synthetic polymer chemistry1,2 and biology3. Processive enzymes nature have evolved substrate-enclosing structures to protect catalytic center from reaccess by nascent polymer4. However, substrate enclosure has not been adopted chemistry improving processivity. Here, we present a strategy processive encapsulating catalysts ring-opening metathesis (ROMP) into sub-surface cages metal-organic framework. The encapsulation within framework protects secondary reaction with alkenes backbone polymer, while allowing grow out little impedance achieve continuous growth. As result, ultra-high-molecular-weight low dispersity were generated ROMP low-strain cyclic olefins such as cis-cyclooctene cyclopentene. We demonstrate that degradable backbones enhanced mechanical adhesive properties could be readily this approach.

Language: Английский

Citations

1
P123-CoMgAl nanocomposite for sustainable and high-conversion epoxide ring-opening polymerization DOI Creative Commons
Ling Xu, Xiaoyan Cao, Yipeng Yang

et al.

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 17, 2024

Abstract The ring-opening polymerization lays the foundation for synthesizing polypropylene glycol (PPG). Nevertheless, homogeneous alkali catalysts generally necessitate intricate posttreatments, hampering green synthesis and ensuring environmental sustainability. Here, we develop a heterogeneous epoxide method based on P123-modified nanocomposite layered double oxide (CoMgAl-LDO (P123)). Benefiting from designable self-assembled P123 micelles, CoMgAl-LDO (P123) yields intergranular gaps consistent mesoporous channels effective catalysis. Consequently, has large surface-to-volume ratio of 190.0 m 2 g − 1 pore volume 1.0 cm 3 . More importantly, catalytic conversion approaches 96.3%, which is higher than 92% other solid catalysts. Our strategy addresses trade-off issue that face in terms sustainability operational complexity, holding great promise chemistry.

Language: Английский

Citations

0
Orthogonal Radical and Cationic Single‐Unit Monomer Insertions for Engineering Polymer Architectures DOI

Ze Wei,

Wei He,

Zhihua Liu

et al.

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(31)

Published: May 18, 2024

Abstract The single‐unit monomer insertion (SUMI), derived from living/controlled polymerization, can be directly functionalized at the end or within chain of polymers prepared by offering potential applications in preparation with complex architectures. Many scenarios demand simultaneous incorporation monomers suitable for different polymerization methods into polymers. Therefore, it becomes imperative to utilize SUMI technologies diverse mechanisms, especially those that are compatible each other. Here, we reported orthogonal technique, seamlessly combining radical and cationic approaches. Through careful optimization transfer agent pairs adjustments reaction conditions, efficiently execute both processes one pot without mutual interference. utilization facilitates integration reversible addition‐fragmentation (RAFT) various configurations. This flexibility enables synthesis diblock, triblock, star incorporate cationically radically polymerizable monomers. Moreover, have successfully implemented a mixing mechanism free radicals cations RAFT step‐growth resulting creation side‐chain sequence‐controlled polymer brushes.

Language: Английский

Citations

0
Rapid and High-Resolution 3D Printing via Photoacid Genera-tor induced Cationic RAFT Polymerization DOI Creative Commons
Jian Zhu, Wen Zhao, Jiajia Li

et al.

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 23, 2024

Abstract Vinyl ethers, while being typical monomers for living cationic polymerization, have limited commercial use due to poor mechanical properties of their polymers at room temperature. We explored the photoacid generators (PAGs) induce reversible addition-fragmentation chain transfer (RAFT) polymerization rapid high-resolution 3D printing various vinyl ethers. The process demonstrated controlled molecular weights and narrow weight distributions (MWD), with monomer conversions exceeding 90% in minutes. Incorporating a crosslinker enabled speeds up 8.46 cm h-1 layer thicknesses as thin 50 microns. printed objects were tunable by adjusting resin components, allowing range material characteristics from brittle elastomeric (tensile strength ranging 13.9 31.7 MPa, Young's modulus 185.6 992.7 MPa elongation break 2.8 68.3%). Moreover, polymer welding facilitated creation gradient materials, showcasing potential engineered applications poly(vinyl ethers).

Language: Английский

Citations

0