Synfacts, Год журнала: 2023, Номер 19(12), С. 1201 - 1201
Опубликована: Ноя. 15, 2023
Key words polyolefins - post-polymerization modification C–H functionalization photoinduced catalysis
Язык: Английский
Green Chemistry, Год журнала: 2024, Номер 26(15), С. 8528 - 8549
Опубликована: Янв. 1, 2024
Recent developments in the photochemical upcycling and recycling of plastics.
Язык: Английский
Процитировано
13
Nano Research, Год журнала: 2024, Номер unknown
Опубликована: Сен. 9, 2024
Язык: Английский
Процитировано
11
Macromolecules, Год журнала: 2024, Номер 57(8), С. 3595 - 3603
Опубликована: Апрель 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.
Язык: Английский
Процитировано
5
Chinese Journal of Chemistry, Год журнала: 2024, Номер 42(20), С. 2431 - 2437
Опубликована: Май 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.
Язык: Английский
Процитировано
4
Asian Journal of Organic Chemistry, Год журнала: 2025, Номер unknown
Опубликована: Май 26, 2025
Abstract Photo‐assisted, iron‐catalyzed C─H functionalizations represent nowadays a sustainable tool to develop unprecedented transformations, unviable by common catalytic organometallic approaches promoted transition metals. In fact, the use of this new technology allows for more efficient synthetic transformations increasing chemo‐, regio‐ and site‐selectivity catalysis while reducing formation by‐products shortening reaction times. Further, replacement precious transition‐metals with iron catalysts is highly desiderable development environmentally‐friendly methods. Within review, we aim summarize latest achievements combining most abundant safe metal in “outer‐sphere” functionalization reactions mediated light C─C C─Het bonds, including challenging C─N, C─P, C─B C─S bonds. Particular attention has been directed toward description mechanistic aspects application methods late‐stage polymers, marketed drugs, biologically‐active compounds materials.
Язык: Английский
Процитировано
0
Chem, Год журнала: 2024, Номер 10(10), С. 3088 - 3099
Опубликована: Июнь 19, 2024
Язык: Английский
Процитировано
3
Chinese Chemical Letters, Год журнала: 2024, Номер unknown, С. 110579 - 110579
Опубликована: Окт. 1, 2024
Язык: Английский
Процитировано
3
Chemical Communications, Год журнала: 2024, Номер unknown
Опубликована: Янв. 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.
Язык: Английский
Процитировано
3
ACS Macro Letters, Год журнала: 2025, Номер unknown, С. 490 - 494
Опубликована: Март 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.
Язык: Английский
Процитировано
0
Synlett, Год журнала: 2023, Номер 35(10), С. 1175 - 1179
Опубликована: Окт. 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.
Язык: Английский
Процитировано
7