Enhanced Efficiency of Amide‐Substituted Quinuclidine‐Boranes as Hydridic Hydrogen Atom Transfer Catalysts for Photoinduced Hydroalkylation of Unactivated Olefins† DOI
Yang Xiao,

Mengsi Ma,

Meichen Xu

et al.

Chinese Journal of Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 10, 2024

Comprehensive Summary An amide‐substituted quinuclidine‐borane has been identified as a more efficient hydridic hydrogen atom transfer (HAT) catalyst for the hydroalkylation of unactivated olefins under visible‐light irradiation. 1 H NMR titration experiments reveal that amide moiety forms stronger bonds with carbonyl substrates, thereby improving reaction yields. Furthermore, it was found yields correlate well association constant between and substrate. A scale‐up using continuous‐flow photoreactor also demonstrated.

Language: Английский

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

et al.

Chemical Communications, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 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.

Language: Английский

Citations

3
Oxygen-Driven Atom Transfer Radical Polymerization DOI

Yuxuan Du,

Zhe Chen,

Zhikang Xie

et al.

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 16, 2025

In traditional atom transfer radical polymerization (ATRP), oxygen must be meticulously eliminated due to its propensity quench species and halt the process. Additionally, oxidizes lower-valent Cu catalyst, compromising ability activate alkyl halides propagate polymerization. this study, we present an oxygen-driven ATRP utilizing alkylborane compounds, a method that not only circumvents need for stringent removal but also exploits as essential cofactor promote This approach exhibits broad compatibility in organic or aqueous media, yielding well-defined polymers with low dispersity (Đ 1.11) molecular weights closely aligned theoretical values. Triethylborane (Et3B) air-stable triethylborane-amine complex (Et3B-DMAP) facilitate controlled under open-to-air conditions, demonstrating efficiency across wide range of monomers. Moreover, technique enables successful synthesis protein–polymer conjugates supports surface modifications nanoparticles silicon wafers aerobic conditions. represents robust versatile platform precision far-reaching implications materials science, biomedicine, advanced engineering.

Language: Английский

Citations

1
Controlled synthesis of polymers in the light of green chemistry DOI
Д. Ф. Гришин, Ivan D. Grishin

Russian Chemical Reviews, Journal Year: 2025, Volume and Issue: 94(4), P. RCR5164 - RCR5164

Published: April 1, 2025

The discovery of reversible deactivation radical polymerization (RDRP), or controlled (CRP) has revolutionized the chemistry synthetic polymers. This strategy opened up way to polymer materials with architecture, composition, and functions. Currently, owing use novel approaches related chain deactivation, gone beyond synthesis. It can be used obtain not only macromolecular organic compounds, but also organic-inorganic hybrid materials, bioconjugates, promising polymers for electronics, energy production, medicine, other high-tech fields. is exceptionally important that some CRP methods have a clear-cut environmental component, since they are focused on compliance most principles green development nature-like processes in targeted synthesis well-defined specified set properties characteristics. review considers particular examples analyzes possible prospects practical application environmentally benign functional A comparative analysis performed classical living wide range monomers (reversible inhibition, addition fragmentation transfer, atom transfer involving transition metal complexes), concept photoredox catalysis, methodology as applied gives above aspects, including procedural details photoinitiation their relationship key principles. In our opinion, this will interest specialists field chemistry, chemists scientists. <br> bibliography includes 242 references.

Language: Английский

Citations

0
Tunable multicolor fluorescence of polyurethane derivatives controlled by molecular weight DOI
Kexin Li,

Ya-Jie Meng,

Chang-Yi Zhu

et al.

Polymer Chemistry, Journal Year: 2024, Volume and Issue: 15(22), P. 2235 - 2239

Published: Jan. 1, 2024

Boron-containing luminescent polymers have been extensively studied for their tunable absorption/emission and excellent light stability.

Language: Английский

Citations

2
Fast Gelation and Mechanical Reinforcement of Tetrahydroxydiboron-Induced Free Radical Polymerized Hydrogels under Harsh Conditions DOI
Yi Wang,

Wanting Yuan,

Qianqian Liang

et al.

Macromolecules, Journal Year: 2024, Volume and Issue: 57(21), P. 9965 - 9976

Published: Oct. 18, 2024

Hydrogels prepared through free radical polymerization hold great promise for large-scale production and practical applications but face challenges due to oxygen inhibition during poor mechanical properties. These issues often necessitate complex structural designs time-consuming anaerobic processes. This work presents a novel approach using tetrahydroxydiboron (THDB) combined with potassium persulfate (KPS) rapidly produce hydrogels enhanced properties under aerobic conditions, overcoming traditional limitations. The THDB-KPS system facilitates the gelation of acrylamide (AM) precursors in just 2 min ambient significantly outperforming existing systems. method is versatile across various monomer types, including hydrophilic, electrolyte, macromolecular zwitterionic monomers. rapid effect stems from THDB's ability interact dissolved neutralize inhibitory effects oxygen, promote decomposition efficiently by homolytic cleavage (HO)2B· radicals coordination N or O vinyl monomers diboron structure. Meanwhile, boron-induced hydrogen bonding interactions, along fast rise temperature viscosity reaction system, contribute shortened time as well. factors also lead formation multiple physical cross-links well network densely loosely cross-linked regions. Consequently, hydrogel are progressive deformation these regions breakage cross-links. reinforcement remains effective even challenging acidic alkaline environments, low temperatures impurity-laden environments. Therefore, this breakthrough offers scalable efficient producing high-performance harsh promising substantial advancements industrial use diverse fields.

Language: Английский

Citations

2
Oxygen-initiated radical ring-opening polymerization of macrocyclic allylic sulfides under ambient conditions DOI
Suqiu Jiang, Hanchu Huang

Polymer, Journal Year: 2024, Volume and Issue: 303, P. 127106 - 127106

Published: April 29, 2024

Language: Английский

Citations

2
Enhanced Efficiency of Amide‐Substituted Quinuclidine‐Boranes as Hydridic Hydrogen Atom Transfer Catalysts for Photoinduced Hydroalkylation of Unactivated Olefins† DOI
Yang Xiao,

Mengsi Ma,

Meichen Xu

et al.

Chinese Journal of Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 10, 2024

Comprehensive Summary An amide‐substituted quinuclidine‐borane has been identified as a more efficient hydridic hydrogen atom transfer (HAT) catalyst for the hydroalkylation of unactivated olefins under visible‐light irradiation. 1 H NMR titration experiments reveal that amide moiety forms stronger bonds with carbonyl substrates, thereby improving reaction yields. Furthermore, it was found yields correlate well association constant between and substrate. A scale‐up using continuous‐flow photoreactor also demonstrated.

Language: Английский

Citations

2