Reassessing the Photochemical Upcycling of Polystyrene Using Acridinium Salts DOI Creative Commons
Ana S. Abreu, Daniel Taton, Dario M. Bassani

et al.

Angewandte Chemie, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 13, 2024

Abstract Polystyrene ( PS ) is a commodity plastic recalcitrant to chemical recycling or upcycling processes. Approaches aimed at deconstructing by photocatalytic means struggle generate high‐energy species capable of cleaving the robust C−H and C−C bonds . We show that 9‐mesityl‐10‐methylacridinium perchlorate MA various grades substrates into up 40 % benzoic acid BAc ), formic FA small proportions acetophenone ACP under visible light (456 nm) through solar radiation. Time‐resolved emission absorption spectroscopy evidence reaction with oxygen primary photochemical step in oxygen‐saturated solutions, accounting for 77 photons absorbed vs. 1 direct (0.303 M repeating units). These results are agreement mechanism which ‐mediated photo occurs abstraction benzylic H atoms reactive generated energy electron transfer from excited state Addition triplet O 2 these radicals, followed intra‐ inter‐molecular hydrogen atom (HAT) generates C‐ O‐centered radicals then undergoing β‐scission hydroperoxide fragmentation. The formation intermediate oligomers functionalized terminal carbonyl groups demonstrated both infrared analysis MALDI TOF mass spectrometry. undergo further photoinduced conversion even absence , as evidenced size exclusion chromatography irradiated samples.

Language: Английский

Construction of carboxyl-functionalized hyper-cross-linked porous polymers using waste polystyrene for effective adsorption of phenolic contaminants DOI
Chenhuan Wang, Qianqian Wang,

Kaiyuan Si

et al.

Journal of Chromatography A, Journal Year: 2025, Volume and Issue: unknown, P. 465925 - 465925

Published: March 1, 2025

Language: Английский

Citations

0
Photooxidation of Polystyrene into High‐Value Chemicals DOI

Shaokai Jiang,

Yunhan Chen, Yahao Huang

et al.

European Journal of Organic Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 5, 2024

Abstract Plastics play a crucial role in the survival and advancement of human civilization. However, increasing challenge plastic pollution presents significant obstacles. Disposal methods such as incineration landfilling result substantial resource wastage pose potential environmental hazards. The slow progress recycling reusing waste plastics hinders their industrial application effective response to crises. Photocatalysis offers promising solutions for future recycling, particularly with recent increase photocatalytic degradation polystyrene (PS). This review provides comprehensive overview latest advancements photooxidation PS into high‐value chemicals.

Language: Английский

Citations

0
Reassessing the Photochemical Upcycling of Polystyrene Using Acridinium Salts DOI Creative Commons

Anne‐Lise De Abreu,

Daniel Taton, Dario M. Bassani

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 13, 2024

Abstract Polystyrene ( PS ) is a commodity plastic recalcitrant to chemical recycling or upcycling processes. Approaches aimed at deconstructing by photocatalytic means struggle generate high‐energy species capable of cleaving the robust C−H and C−C bonds . We show that 9‐mesityl‐10‐methylacridinium perchlorate MA various grades substrates into up 40 % benzoic acid BAc ), formic FA small proportions acetophenone ACP under visible light (456 nm) through solar radiation. Time‐resolved emission absorption spectroscopy evidence reaction with oxygen primary photochemical step in oxygen‐saturated solutions, accounting for 77 photons absorbed vs. 1 direct (0.303 M repeating units). These results are agreement mechanism which ‐mediated photo occurs abstraction benzylic H atoms reactive generated energy electron transfer from excited state Addition triplet O 2 these radicals, followed intra‐ inter‐molecular hydrogen atom (HAT) generates C‐ O‐centered radicals then undergoing β‐scission hydroperoxide fragmentation. The formation intermediate oligomers functionalized terminal carbonyl groups demonstrated both infrared analysis MALDI TOF mass spectrometry. undergo further photoinduced conversion even absence , as evidenced size exclusion chromatography irradiated samples.

Language: Английский

Citations

0
Reassessing the Photochemical Upcycling of Polystyrene Using Acridinium Salts DOI Creative Commons
Ana S. Abreu, Daniel Taton, Dario M. Bassani

et al.

Angewandte Chemie, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 13, 2024

Abstract Polystyrene ( PS ) is a commodity plastic recalcitrant to chemical recycling or upcycling processes. Approaches aimed at deconstructing by photocatalytic means struggle generate high‐energy species capable of cleaving the robust C−H and C−C bonds . We show that 9‐mesityl‐10‐methylacridinium perchlorate MA various grades substrates into up 40 % benzoic acid BAc ), formic FA small proportions acetophenone ACP under visible light (456 nm) through solar radiation. Time‐resolved emission absorption spectroscopy evidence reaction with oxygen primary photochemical step in oxygen‐saturated solutions, accounting for 77 photons absorbed vs. 1 direct (0.303 M repeating units). These results are agreement mechanism which ‐mediated photo occurs abstraction benzylic H atoms reactive generated energy electron transfer from excited state Addition triplet O 2 these radicals, followed intra‐ inter‐molecular hydrogen atom (HAT) generates C‐ O‐centered radicals then undergoing β‐scission hydroperoxide fragmentation. The formation intermediate oligomers functionalized terminal carbonyl groups demonstrated both infrared analysis MALDI TOF mass spectrometry. undergo further photoinduced conversion even absence , as evidenced size exclusion chromatography irradiated samples.

Language: Английский

Citations

0