力化学调控自由基聚合 DOI Creative Commons

Haoyang Feng,

Xiaoyang Shao,

Zhenhua Wang

et al.

Chinese Science Bulletin (Chinese Version), Journal Year: 2024, Volume and Issue: unknown

Published: June 1, 2024

力化学探究物质在机械力作用下发生的化学和物理化学变化,通过机械力反应,可以制备传统方法难以获得的材料,并且有望减少有机溶剂的使用,促进绿色化学的发展。近年来,力化学与可控自由基聚合领域的交叉研究迅速发展,为高分子科学提供了新的思路和方法。这一领域已经取得了一系列重要的进展,开创了基于超声化学、压电催化和接触电催化的力化学调控自由基聚合技术,不仅能够实现高分子量聚合物的制备,还能实现外力对聚合物链长和结构的精确控制。然而,当前力化学调控的自由基聚合仍存在一些关键问题需要解决,如副反应、氧气不兼容性和引入大量无机颗粒等,限制了其进一步应用。本文回顾了力化学的历史和高分子力化学的发展,综述了力化学调控自由基聚合的研究进展,并探讨了该领域面临的问题与挑战。

Salient Achievements in Synthetic Organic Chemistry Enabled by Mechanochemical Activation DOI
Eusebio Juaristi, C.G. Ávila-Ortíz

Synthesis, Journal Year: 2023, Volume and Issue: 55(16), P. 2439 - 2459

Published: May 3, 2023

Abstract Although known for millennia, it is only recently that mechanochemistry has received serious attention by chemists. Indeed, during the past 15 years an extraordinary number of reports concerning solid-state chemical transformations through grinding and milling techniques have been recorded. This short review discusses circumstances led this renaissance, highlighting present intense interest in so-called green chemistry, enabling capacity to handle insoluble substrates, identification profound influence additives can on mechanochemically activated reactions. The core account focuses salient developments synthetic organic especially amino acid peptide­ mechanosynthesis, successful employment mechanochemical activation combination with asymmetric organocatalysis, promising enzymatic whole cell biocatalysis, remarkable achievement multicomponent selective reactions via complex, multistep reaction pathways, mechanosynthesis representative heterocycles. final section comments some pending tasks area, such as scaling-up processes be practical use industry, requirement easier more efficient control parameters monitoring devices, consequently careful analysis additional procedures a proper understanding phenomena. 1 Introduction 2 Brief History Mechanochemistry 3 Milling Equipment Reaction Parameters 4 Attributes That Propelled Its Present Renaissance 4.1 Enormous Attention Being Presently Paid Sustainable Chemistry 4.2 Reduced Energy Consumption 4.3 Additive-Based 4.4 Handling Insoluble Reactants 4.5 ‘Impossible’ Reactions Are Successful 4.6 Air- Water-Sensitive Reagents Ball 5 Salient Developments Mechanochemical Activation Synthetic Organic 5.1 Amino Acid Peptide Mechanosynthesis 5.2 Asymmetric Synthesis Organocatalysis under Ball-Milling Conditions 5.3 Mechanoenzymology 5.4 Multicomponent Activated 5.5 Heterocycles Modification 6 Future Directions 6.1 Scaling-Up Protocols 6.2 Temperature-Controlled 6.3 Understanding Transformations 6.4 Emerging Techniques 7 Conclusions

Language: Английский

Citations

52

Harvesting the Vibration Energy of CdS for High‐Efficient Piezo‐Photocatalysis Removal of U(VI): Roles of Shape Dependent and Piezoelectric Polarization DOI Creative Commons

Zhimin Dong,

Donglin Gao,

Zifan Li

et al.

Energy & environment materials, Journal Year: 2024, Volume and Issue: 7(5)

Published: Jan. 22, 2024

Piezo‐photocatalysis could coalesce the advantages of mechanical vibration and solar energy perfectly to achieve high‐efficiency catalytic activity. Herein, quintessential piezoelectric material CdS nanowires with different aspect ratios are precisely constructed applied for piezo‐photocatalytic reduction U(VI) first time. The ultrasonic (60 kHz, 100 W) induces potential generate a 0.57 eV A −1 electric field, which is added direction (010) as driving force efficiently separate photogenerated charges. alliance between effect photocatalytic activity endows NW‐3 fastest rate under 5 W LED irradiation, relevant constant (0.042 min ) about 12 53.8 times than that ultrasonication. More importantly, 93.74% be removed from natural uranium mine wastewater. Therefore, this piezo‐photocatalysis system reduces easily separable (UO 2 )O ·2H O(s) provides valuable input disposal applications radioactive wastewater broadens horizons nuclear utilization toward advancement carbon neutrality.

Language: Английский

Citations

20

Low-frequency mechanical energy in the environment for energy production and piezocatalytic degradation of organic pollutants in water: A review DOI
Xiaxia Chen, Jingxue Wang, Zichen Wang

et al.

Journal of Water Process Engineering, Journal Year: 2023, Volume and Issue: 56, P. 104312 - 104312

Published: Sept. 19, 2023

Language: Английский

Citations

25

Depolymerization of Polymethacrylates with Ball-Mill Grinding DOI
Eunsong Jung, Minyoung Cho, Gregory I. Peterson

et al.

Macromolecules, Journal Year: 2024, Volume and Issue: 57(7), P. 3131 - 3137

Published: March 25, 2024

In this report, we demonstrate that polymethacrylates can undergo appreciable depolymerization, with mild conditions and without reactive end groups, using ball-mill grinding (BMG). For instance, the important commercial polymer, poly(methyl methacrylate) (PMMA) underwent up to 41% depolymerization monomer within 8 min of grinding. We explored factors influence conversion found temperature (heating only 43 °C), addition a small amount liquid (μL tert-butyl alcohol), ball number/size be most parameters. also applied method other pendent substituent extent depolymerization. Addition was reverse effects were observed bulk among studied, PMMA had lowest in one highest conversions slurry. Notably, molecular weight residual polymer is remarkably low, ca. 1 kDa, demonstrating excellent degradation performance BMG. Overall, work provides mechanistic insight into reactions under ball-milling represents an step expanding BMG as tool for chemical recycling polymethacrylates.

Language: Английский

Citations

13

Advancements and opportunities in piezo-(photo)catalytic synthesis of value-added chemicals DOI Creative Commons
Weiliang Qi, Yaping Fu,

Enbo Liu

et al.

EES Catalysis, Journal Year: 2024, Volume and Issue: 2(4), P. 884 - 910

Published: Jan. 1, 2024

Achieving value-added transformation of chemicals through green catalytic technology can simultaneously meet the market and environmental protection. This article reviews recent advances in synthesizing using piezo-(photo)catalytic technologies.

Language: Английский

Citations

11

Mechanical‐Force‐Induced Non‐spontaneous Dehalogenative Deuteration of Aromatic Iodides Enabled by Using Piezoelectric Materials as a Redox Catalyst DOI

Ruiling Qu,

Shan Wan, Xuemei Zhang

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(28)

Published: April 30, 2024

Abstract The development of green and efficient deuteration methods is great significance for various fields such as organic synthesis, analytical chemistry, medicinal chemistry. Herein, we have developed a dehalogenative strategy using piezoelectric materials catalysts in solid‐phase system under ball‐milling conditions. This non‐spontaneous reaction induced by mechanical force. D 2 O can serve both deuterium source an electron donor the transformation, eliminating need additional stoichiometric exogenous reductants. A series (hetero)aryl iodides be transformed into deuterated products with high incorporation. method not only effectively overcomes existing synthetic challenges but also used labelling drug molecules derivatives. Bioactivity experiments molecule suggest that D‐ipriflavone enhances inhibitory effects on osteoclast differentiation BMDMs vitro .

Language: Английский

Citations

11

Aerobic mechanochemical reversible-deactivation radical polymerization DOI Creative Commons
Haoyang Feng, Zhe Chen,

Lei Li

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: July 22, 2024

Abstract Polymer materials suffer mechano-oxidative deterioration or degradation in the presence of molecular oxygen and mechanical forces. In contrast, aerobic biological activities combined with stimulus promote tissue regeneration repair various organs. A synthetic approach which energy synergistically initiate polymerization will afford similar robustness polymeric materials. Herein, mechanochemical reversible-deactivation radical was developed by design an organic mechano-labile initiator converts into activators response to ball milling, enabling reaction proceed air low-energy input, operative simplicity, avoidance potentially harmful solvents. addition, this not only complements existing methods access well-defined polymers but also has been successfully employed for controlled (meth)acrylates, styrenic monomers solid acrylamides as well synthesis polymer/perovskite hybrids without solvent at room temperature are inaccessible other means.

Language: Английский

Citations

8

Organic Reactions Enabled by Mechanical Force‐Induced Single Electron Transfer DOI
Ruoxuan Liu,

Xiaochun He,

Tianfen Liu

et al.

Chemistry - A European Journal, Journal Year: 2024, Volume and Issue: 30(47)

Published: June 18, 2024

Mechanochemical reactions, achieved through milling, grinding, or other mechanical actions, have emerged as a solvent-free alternative to traditional solution-based chemistry. Mechanochemistry not only provides the opportunity eliminate bulk solvent use, reducing waste generation, but also unveils new reaction strategy which enables realization of reactions previously inaccessible in solution. While majority organic facilitated by force traditionally follow two-electron transfer pathways similar their counterparts, field mechanochemically induced single-electron (SET) has witnessed rapid development. This review outlines examples mechanochemical SET process, focusing on reagents that initiate SET, thereby positioning mechanochemistry burgeoning within realm

Language: Английский

Citations

7

Critical review on magnetic separable molecularly imprinted photocatalyst: Synthesis, reaction mechanism and outlook for practical applications DOI
Siu‐Hin Wan, Azam Taufik Mohd Din, Ahmad Zuhairi Abdullah

et al.

Materials Science in Semiconductor Processing, Journal Year: 2025, Volume and Issue: 189, P. 109292 - 109292

Published: Jan. 15, 2025

Language: Английский

Citations

1

Mechanochemical Vicinal Dibromination of Unactivated Alkenes and Alkynes Using Piezoelectric Material as a Redox Catalyst DOI

Fengzhi You,

Xuemei Zhang, Xiaohong Wang

et al.

Organic Letters, Journal Year: 2024, Volume and Issue: 26(20), P. 4240 - 4245

Published: May 14, 2024

Mechanoredox chemistry is a rapidly evolving field at the intersection of mechanical forces and chemical reactions. Herein, we have reported vicinal dibromination unsaturated hydrocarbons using piezoelectric material (Li2TiO3) as redox catalyst. Furthermore, reaction can be efficiently scaled up to 10 mmol performed under an air atmosphere room temperature without solvents or external reductants, Li2TiO3 reused multiple times structural change.

Language: Английский

Citations

6