C–H Activation with Polyolefins by Photoinduced Catalysis DOI

Synfacts, Journal Year: 2023, Volume and Issue: 19(12), P. 1201 - 1201

Published: Nov. 15, 2023

Key words polyolefins - post-polymerization modification C–H functionalization photoinduced catalysis

Language: Английский

Photochemical upcycling and recycling of plastics: achievements and future opportunities DOI Creative Commons
Olga G. Mountanea,

Elpida Skolia,

Christoforos G. Kokotos

et al.

Green Chemistry, Journal Year: 2024, Volume and Issue: 26(15), P. 8528 - 8549

Published: Jan. 1, 2024

Recent developments in the photochemical upcycling and recycling of plastics.

Language: Английский

Citations

12
Catalytic recycling of plastics into value-added products DOI
Tianyu Wei, Pengcheng Zhou, Wenxian Liu

et al.

Nano Research, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 9, 2024

Language: Английский

Citations

10
Covalent Installation of Fluorophores into Polyethylene: Synthesis, Characterization, and Applications DOI
Shuang Wei, Zongnan Zhang, Yanzi Xu

et al.

Macromolecules, Journal Year: 2024, Volume and Issue: 57(8), P. 3595 - 3603

Published: April 11, 2024

Synthesis of fluorescent polyolefins has attracted chemists' considerable attention. While the main methods are based on copolymerization using polar olefins containing fluorophores, direct synthesis covalently polymers from readily available nonpolar is very rare. Herein, we report an efficient protocol for polyethylene materials via photoinduced iron catalysis through C–H bond functionalization polyethylene. Aggregation-induced emission including tetraphenylethylene and benzo[c][1,2,5]thiadiazol-4-yl-triarylamine moieties, could be incorporated to yield with diverse luminescence between 490 650 nm. these emit in both solid solution states, a stretchable white light film prepared by blending three polymers. Moreover, this strategy used series commonly found plastic products. Experiments further revealed potential applications as compatibilizers polymeric detectors nitroaromatic compounds.

Language: Английский

Citations

4
Iron‐Catalyzed Oxidative Deconstruction of Polyethylene Terephthalate to Terephthalic Acid under O2 DOI
Sichang Wang,

Liting Wang,

Ting Xue

et al.

Chinese Journal of Chemistry, Journal Year: 2024, Volume and Issue: 42(20), P. 2431 - 2437

Published: May 31, 2024

Comprehensive Summary It is urgent to recycle polyethylene terephthalate (PET) effectively, since it the most consumed synthetic polyester and its improper disposal has caused significant environmental pollution. The existing chemical recycling methods highly rely on nucleophilic substitutions hydrogenative depolymerizations, which typically require use of excess nucleophiles, strong acids or bases, expensive metal catalysts, explosive gas atmosphere. Here, we demonstrate a mild efficient protocol for oxidative depolymerization PET terephthalic acid using only an O 2 balloon. Terephthalic can be recycled from PET‐containing materials including series plastic products in daily life. employing relatively low loading iron complex, earth‐abundant transition metal, as catalyst preliminary results large‐scale reaction 38 g waste practical feasibility this degradation method. This method also applicable selective mixed plastics. work represents rare example demonstrates great potentials such concept recycling.

Language: Английский

Citations

4
Photocatalytic Decarboxylative Heck-Type Postpolymerization Modification of Polyacrylates DOI
Le Huang, Meng Chen,

Wenyan Hao

et al.

ACS Macro Letters, Journal Year: 2025, Volume and Issue: unknown, P. 490 - 494

Published: March 29, 2025

Postpolymerization modification of commodity polymers has emerged as a powerful strategy for synthesizing functional that are challenging to obtain via direct polymerization. Moreover, it offers opportunities upcycle existing and enhance their material properties. In this work, we introduce photocatalytic decarboxylative Heck-type approach polyacrylates. By employing an acridine-based photocatalyst in combination with cobaloxime catalyst, hydrolyzed polyacrylates varying carboxylic acid contents were efficiently converted into bearing olefin functionalities. The degree incorporation notably influenced the thermal properties resulting materials. Importantly, protocol is applicable broad range vinyl comonomers, yielding 1,3-diene copolymers exclusive 1,2-insertion selectivity. Furthermore, variety terminal alkenes can be utilized functionalize acrylate copolymers, subsequent thiol-ene click reactions further expand versatility accessible polymers.

Language: Английский

Citations

0
Modifying commodity-relevant unsaturated polymers via Co-catalyzed MHAT DOI

Yun-Nian Yin,

Bang-Sen Zhao,

Han-Yuan Liu

et al.

Chem, Journal Year: 2024, Volume and Issue: 10(10), P. 3088 - 3099

Published: June 19, 2024

Language: Английский

Citations

3
Homogeneous catalysis and heterogeneous separation: Ionic liquids as recyclable photocatalysts for hydroacylation of olefins DOI

Hao‐Cong Li,

Ming Zhang, Qi‐Yan Lv

et al.

Chinese Chemical Letters, Journal Year: 2024, Volume and Issue: unknown, P. 110579 - 110579

Published: Oct. 1, 2024

Language: Английский

Citations

3
Photochemical upcycling of polymers via visible light-driven C−H bond activation DOI
Yi Wei, Jing Liu, Xiao‐Qiang Hu

et al.

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

Published: Jan. 1, 2024

This mini-review highlights the scientific breakthroughs in photochemical upcycling polymers through oxidative degradation and post-polymerization modification via visible light-driven C–H bond activation.

Language: Английский

Citations

3
FeCl3-Catalyzed Aerobic Oxidative Degradation of Polystyrene to Benzoic Acid. Scope and Mechanism DOI
Guoxiang Zhang,

Ting Xue,

Li‐Ting Wang

et al.

Synlett, Journal Year: 2023, Volume and Issue: 35(10), P. 1175 - 1179

Published: Oct. 30, 2023

Abstract Chemical upcycling of polystyrene (PS) is one the most promising approaches to plastic waste reuse and achieve economic development goals. However, it remains a huge challenge because PS has only chemically inert covalent bonds. As part an ongoing study, we herein describe development, scope, mechanism photoinduced iron catalysis for selective oxidative degradation benzoic acid. A series commonly found products could be degraded acid efficiently. plausible involving radical-based stepwise aerobic oxidation was proposed.

Language: Английский

Citations

7
Post-polymerization Modification of Polystyrene through Mn-Catalyzed Phosphorylation of Aromatic C(sp2)-H Bonds DOI Open Access

Ruixing Liu,

Cong Lin,

Yubai Zou

et al.

Published: May 16, 2024

The high flammability and lack of charrability polystyrene (PS) pose significant limitations on its broader applications. Therefore, there is an urgent need for a straightforward efficient method the synthesis flame-retardant PS, which still poses considerable challenge. In this study, we present approach to enhance properties PS through direct phosphorylating aromatic C(sp2)-H bonds using commercially available inexpensive manganese catalyst. A range phosphonates served as reactive substrates enable tunable degree polymer functionalization. corresponding phosphorylated specimens were determined by means 1H NMR, 31P FTIR spectroscopy GPC. Microscale combustion calorimetry (MCC) tests indicate that protocol indeed enhances performance PS. Moreover, other advantages associated with incorporation phosphonate group have been observed, including improved thermal resistance wettability. This cost-effective strategy Mn-catalyzed C-H can also be utilized directly obtain modification waste foamed styrene acrylonitrile copolymer, providing new purpose recycling upgrading plastics.

Language: Английский

Citations

2