PhotoROMP: The Future Is Bright DOI Creative Commons
Andrew J. Greenlee,

Raymond A. Weitekamp,

Jeffrey C. Foster

и другие.

ACS Catalysis, Год журнала: 2024, Номер 14(8), С. 6217 - 6227

Опубликована: Апрель 10, 2024

Since the earliest investigations of olefin metathesis catalysis, light has been choice for controlling catalyst activity on demand. From perspective energy efficiency, temporal and spatial control, selectivity, photochemistry is not only an attractive alternative to traditional thermal manufacturing techniques but also arguably a superior manifold advanced applications like additive (AM). In last three decades, pioneering work in field ring-opening polymerization (ROMP) broadened scope material properties achievable through AM, particularly using as both activating deactivating stimulus. this Perspective, we explore trends photocontrolled ROMP systems with emphasis approaches photoinduced activation deactivation catalysts. Recent yielded myriad commercial synthetically accessible photosensitive systems, although comparatively little attention paid achieving precise control over polymer morphology light. Metal-free, photophysical, living have relatively underexplored. To take fuller advantage thermomechanical polymers operational simplicity photocontrol, clear directions are improve reversibility strategies well further develop tuning cross-link density tacticity.

Язык: Английский

Applications of Halogen-Atom Transfer (XAT) for the Generation of Carbon Radicals in Synthetic Photochemistry and Photocatalysis DOI
Fabio Juliá, Timothée Constantin, Daniele Leonori

и другие.

Chemical Reviews, Год журнала: 2021, Номер 122(2), С. 2292 - 2352

Опубликована: Дек. 9, 2021

The halogen-atom transfer (XAT) is one of the most important and applied processes for generation carbon radicals in synthetic chemistry. In this review, we summarize highlight aspects associated with XAT impact it has had on photochemistry photocatalysis. organization material starts analysis mechanistic then follows a subdivision based nature reagents used halogen abstraction. This review aims to provide general overview fundamental concepts main agents involved objective offering tool understand facilitate development new radical strategies.

Язык: Английский

Процитировано

400
Sequence Control from Mixtures: Switchable Polymerization Catalysis and Future Materials Applications DOI Creative Commons
Arron C. Deacy, Georgina L. Gregory, Gregory S. Sulley

и другие.

Journal of the American Chemical Society, Год журнала: 2021, Номер 143(27), С. 10021 - 10040

Опубликована: Июнь 30, 2021

There is an ever-increasing demand for higher-performing polymeric materials counterbalanced by the need sustainability throughout life cycle. Copolymers comprising ester, carbonate, or ether linkages could fulfill some of this as their monomer–polymer chemistry closer to equilibrium, facilitating (bio)degradation and recycling; many monomers are be sourced from renewables waste. Here, efficient broadly applicable route make such copolymers discussed, a form switchable polymerization catalysis which exploits single catalyst, switched between different catalytic cycles, prepare block sequence selective monomer mixtures. This perspective presents principles catalysis, catalyst design criteria, selectivity structural copolymer characterization tools, properties resulting copolymers. Uses thermoplastic elastomers, toughened plastics, adhesives, self-assembled nanostructures, programmed degradation, among others, discussed. The state-of-the-art research into both products, well future challenges directions, presented.

Язык: Английский

Процитировано

172
Radical photoinitiation with LEDs and applications in the 3D printing of composites DOI
Yijun Zhang, Yangyang Xu, Angélique Simon‐Masseron

и другие.

Chemical Society Reviews, Год журнала: 2021, Номер 50(6), С. 3824 - 3841

Опубликована: Янв. 1, 2021

Radical initiation upon LED light irradiation is discussed herein as well its application in additive manufacturing.

Язык: Английский

Процитировано

148
Precision polymer synthesis by controlled radical polymerization: Fusing the progress from polymer chemistry and reaction engineering DOI Open Access
Yin‐Ning Zhou, Jin‐Jin Li, Tiantian Wang

и другие.

Progress in Polymer Science, Год журнала: 2022, Номер 130, С. 101555 - 101555

Опубликована: Май 7, 2022

Язык: Английский

Процитировано

114
Photocatalytic ATRP Depolymerization: Temporal Control at Low ppm of Catalyst Concentration DOI Creative Commons
Kostas Parkatzidis, Nghia P. Truong, Krzysztof Matyjaszewski

и другие.

Journal of the American Chemical Society, Год журнала: 2023, Номер 145(39), С. 21146 - 21151

Опубликована: Сен. 22, 2023

A photocatalytic ATRP depolymerization is introduced that significantly suppresses the reaction temperature from 170 to 100 °C while enabling temporal regulation. In presence of low-toxicity iron-based catalysts and under visible light irradiation, near-quantitative monomer recovery could be achieved (up 90%), albeit with minimal control. By employing ppm concentrations either FeCl2 or FeCl3, during dark periods completely eliminated, thus control possibility modulate rate by simply turning "on" "off". Notably, our approach allowed preservation end-group fidelity throughout reaction, carried out at high polymer loadings 2M), was compatible various polymers sources. This methodology provides a facile, environmentally friendly, temporally regulated route chemically recycle ATRP-synthesized polymers, opening door for further opportunities.

Язык: Английский

Процитировано

52
Oxygen, Light, and Mechanical Force Mediated Radical Polymerization Toward Precision Polymer Synthesis DOI
Zhujun Huang, Jin Dong, Kaiwen Liu

и другие.

Chemical Communications, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

This article highlights the advancements in controlled radical polymerization facilitated by three external regulations of oxygen, light, and mechanical force, outlines future directions polymerization.

Язык: Английский

Процитировано

3
Conjugated Cross-linked Phenothiazines as Green or Red Light Heterogeneous Photocatalysts for Copper-Catalyzed Atom Transfer Radical Polymerization DOI
Sajjad Dadashi‐Silab, Francesca Lorandi,

Matthew J. DiTucci

и другие.

Journal of the American Chemical Society, Год журнала: 2021, Номер 143(25), С. 9630 - 9638

Опубликована: Июнь 21, 2021

Using the power of light to drive controlled radical polymerizations has provided significant advances in synthesis well-defined polymers. Photoinduced atom transfer polymerization (ATRP) systems often employ UV regenerate copper activator species mediate polymerization. Taking full advantage long-wavelength visible for ATRP would require developing appropriate photocatalytic that engage photoinduced electron processes with components generate activating species. Herein, we developed conjugated microporous polymers (CMP) as heterogeneous photocatalysts exploit promoting copper-catalyzed ATRP. The photocatalyst was designed by cross-linking phenothiazine (PTZ) a photoactive core presence dimethoxybenzene cross-linker via Friedel–Crafts reaction. resulting PTZ-CMP network showed photoactivity region due extended conjugation throughout because aromatic groups connecting PTZ units. Therefore, performed CMPs regenerated under green or red irradiation start process. This resulted efficient acrylate and methacrylate monomers high conversion well-controlled molecular weight. nature enabled easy separation reusability subsequent polymerizations.

Язык: Английский

Процитировано

106
Porphyrin-based donor–acceptor COFs as efficient and reusable photocatalysts for PET-RAFT polymerization under broad spectrum excitation DOI Creative Commons
Yifan Zhu, Dongyang Zhu, Yu Chen

и другие.

Chemical Science, Год журнала: 2021, Номер 12(48), С. 16092 - 16099

Опубликована: Янв. 1, 2021

Porphyrin-based donor–acceptor COFs are effective heterogeneous photocatalysts for photoinduced electron transfer-reversible addition–fragmentation chain transfer (PET-RAFT), including aqueous polymerizations and under red-light excitation.

Язык: Английский

Процитировано

79
Cationic RAFT and DT polymerization DOI
Mineto Uchiyama, Kotaro Satoh, Masami Kamigaito

и другие.

Progress in Polymer Science, Год журнала: 2021, Номер 124, С. 101485 - 101485

Опубликована: Ноя. 14, 2021

Язык: Английский

Процитировано

71
Self-Switchable Polymerization: A Smart Approach to Sequence-Controlled Degradable Copolymers DOI Open Access
Chenyang Hu, Xuan Pang, Xuesi Chen

и другие.

Macromolecules, Год журнала: 2022, Номер 55(6), С. 1879 - 1893

Опубликована: Март 11, 2022

In the quest for sustainable development, degradable polymers are attractive alternatives to traditional fossil-based plastics. As monocomponent often suffer from unsatisfactory performances, utilization of corresponding copolymers with tailored block compositions is viable improved properties. To this end, emerging field self-switchable polymerization offers a facile access on-demand synthesis controlled sequences, in which polymerizations were regulated by monomers themselves. This Perspective outlines state-of-the-art systems based on ring-opening (co)polymerization various types monomers. The scope catalysts and monomer summarized. Comprehensive comparison between different offered along an outlook possible future.

Язык: Английский

Процитировано

63