Chemical Communications, Journal Year: 2024, Volume and Issue: unknown
Published: Jan. 1, 2024
Metal-free donor–acceptor type molecular photocatalysts enable efficient O-ATRP under visible light, allowing for precise control over polymer weight with low dispersity.
Language: Английский
ACS Applied Polymer Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 5, 2025
Language: Английский
Citations
1
Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(42), P. 28994 - 29005
Published: Oct. 10, 2024
In atom transfer radical polymerization (ATRP), dormant alkyl halides are intermittently activated to form growing radicals in the presence of a Cu
Language: Английский
Citations
5
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown
Published: Nov. 29, 2024
Abstract Photomediated Atom Transfer Radical Polymerization (photoATRP) is an activator regeneration method, which allows for the controlled synthesis of well‐defined polymers via light irradiation. Traditional photoATRP often limited by need high‐energy ultraviolet or violet light. These could negatively affect control and selectivity polymerization, promote side reactions, may not be applicable to biologically relevant systems. This drawback can circumvented introduction catalytic amount photocatalysts, absorb visible and/or NIR and, therefore, controlled, regenerative ATRP performed with dual‐catalytic cycle. Herein, a critical summary recent developments in field dual‐catalysis concerning Cu‐catalyzed provided. Contributions involved species are examined mechanistically, followed challenges future directions towards next generation advanced functional macromolecular materials.
Language: Английский
Citations
3
Chinese Journal of Chemistry, Journal Year: 2025, Volume and Issue: unknown
Published: March 20, 2025
Comprehensive Summary Substantial progress has been made over recent years in visible light‐driven dual photoredox/copper catalyzed atom transfer radical polymerization (photo‐ATRP) through the design of photocatalysts (PCs) and optimization reaction conditions. However, it remains challenging to achieve efficient photo‐ATRP with low loadings both photocatalyst copper(II). In this study, two donor‐acceptor organic PCs based on pyrazino[2,3‐ f ][1,10]phenanthroline were successfully used Cu(II)‐mediated photo‐ATRP. These exhibit excellent light absorption capabilities thermally activated delayed fluorescence (TADF) properties. Under blue irradiation, facilitated highly oxygen‐tolerant an extremely catalyst loading (50 ppb). This system demonstrated a broad applicability various monomers, achieving successful methacrylates, acrylates, styrene. Additionally, large scale (250 mL) was achieved, resulting narrow molecular weight polymers high monomer conversions chain‐end fidelity. work provides in‐depth investigation into regulatory process photo‐ATRP, offering new insights intricate mechanism oxygen tolerance.
Language: Английский
Citations
0
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
Accounts of Chemical Research, Journal Year: 2025, Volume and Issue: unknown
Published: May 1, 2025
ConspectusUltraviolet (UV) light has traditionally been used to drive photochemical organic transformations, mainly due the limited visible-light absorption of most molecules. However, high energy associated with UV often causes undesirable side reactions. In late 2000s, MacMillan, Yoon, and Stephenson pioneered use visible in conjunction photocatalysts (PCs) initiate transformations. This innovative approach overcame limitations by utilizing visible-light-absorbing PCs their photoexcited states for electron or transfer, generating reactive radical species promoting photoreactions. Furthermore, while photocatalysis predominantly relied on transition-metal complexes, concerns over potential toxicity, cost, sustainability these metals have driven development PCs. These eliminate need metal removal, offer structural diversity, enable tuning properties, thus paving way creation a tailored library PCs.In recent decades, significant advancements made novel diverse scaffolds, notable example being work Zhang et al. 2016. They demonstrated that cyanoarene analogues, originally developed Adachi thermally activated delayed fluorescence (TADF) light-emitting diodes, could function effectively as Building insights, we PC design platform featuring TADF compounds twisted donor-acceptor structures, which paved new discoveries. We showcased PCs' ability (i) generate long-lived lowest triplet excited (T1) (ii) tune redox potentials independently modifying donor acceptor moieties. Through this platform, discovered varying capability populate T1 states, establishing structure-property relationships within our creating selection criteria targeted Specifically, highly efficient reversible-deactivation polymerizations, including organocatalyzed atom transfer polymerization, photoinduced electron/energy reversible addition-fragmentation chain polymerization dual photoredox/copper catalysis well rapid free polymerizations. also facilitated functionalized, visible-light-cured adhesives advanced display technologies. investigated origins exceptional catalytic performance through comprehensive mechanistic studies, electrochemical photophysical measurements, quantum chemical calculations, kinetics simulations. studied formation degradation key intermediates photocatalytic dehalogenations alkyl aryl halides. Our findings revealed distinctive photodegradation pattern cyanoarene-based PCs, significantly impact efficiency reaction. Additionally, discovery led us introduce concept beneficial first time.Over past based state become central synthesis. Utilizing systems enhance overall various overview contributions visible-light-driven photocatalysis, highlight role broadening applications analysis, enabling more sustainable
Language: Английский
Citations
0
ChemPhotoChem, Journal Year: 2025, Volume and Issue: unknown
Published: May 21, 2025
Photochemistry has revolutionized the chemical industry by introducing sustainable and energy‐efficient processes that are vital for manufacture of advanced materials which align with Industry 4.0 standards. Among photochemical techniques, photopolymerization stands out as a rapid, controlled, eco‐friendly approach, making it particularly suitable applications like 3D printing. This research in two‐photon‐induced microfabrication led to groundbreaking performance, thanks use custom π‐ extended molecular architectures photoinitiators. Building on these results, photoactivable initiation system photoinduced‐atom transfer radical polymerization (photoATRP) is now reported using similar π ‐extended photoinitiator. Through comprehensive optimization, we successfully created functional multicomponent photoinitiating system, its detailed mechanism thoroughly established solution. By covalently attaching alkyl halides glass surfaces, were able implement surface‐induced photo‐ATRP technique create customized brush polymer architectures. work not only advances understanding photoATRP mechanisms but also introduces new strategies surface engineering, potential modification 3D/4D structures via photoATRP.
Language: Английский
Citations
0
Macromolecular Chemistry and Physics, Journal Year: 2024, Volume and Issue: unknown
Published: Oct. 20, 2024
Abstract The photoATRP of methyl acrylate (MA) is investigated using riboflavin (RF) and CuBr 2 /Me 6 TREN as a dual catalyst system under green LED irradiation (λ ≈ 525 nm). Both RF enhanced oxygen tolerance, enabling effective ATRP in the presence residual oxygen. High molar mass polymers (up to M n 129 000 g·mol −1 ) with low dispersity ( Đ ≤ 1.16) are prepared, chain‐end fidelity confirmed through successful chain extension. molecular masses obtained polymer increased linearly conversion showed high initiation efficiency. Mechanistic studies by laser flash photolysis reveal that predominant activator generation mechanism reductive quenching Me (83%, [CuBr ]/[Me TREN] = 1/3 condition), supported polymerization kinetics thermodynamic calculations.
Language: Английский
Citations
2
The Journal of Physical Chemistry Letters, Journal Year: 2024, Volume and Issue: unknown, P. 11784 - 11791
Published: Nov. 18, 2024
Reverse intersystem crossing (RISC) has become possible by minimizing the energy gap between first excited singlet (S1) and triplet state (T1), which facilitates thermally activated delayed fluorescence (TADF). Due to small singlet–triplet gap, S1 T1 states exhibit comparable redox reactivity, leading organic TADF compounds be potent photocatalysts. Here, we report such with multiple donor units designed as an efficient photocatalyst for direct C(sp3)-H carbamoylation of saturated aza-heterocycles. The results obtained photophysical investigations chemical calculations confirm that both are involved in photocatalysis cycle, fast spin-flip from being a crucial factor enhancement catalytic performance. findings will beneficial design novel, characteristics aid development photocatalysis.
Language: Английский
Citations
2
Soft Science, Journal Year: 2024, Volume and Issue: 4(3)
Published: July 31, 2024
As device form factors evolve towards increased complexity and flexibility, the role of adhesives within display module stack becomes increasingly crucial. These are essential for bonding functional layers with minimal thickness while mitigating stress during dynamic behavior flexible devices. This paper offers a comprehensive overview properties - such as adhesion, viscoelasticity, optical characteristics, environmental reliability necessary stable operation devices across diverse environments. In particular, it provides an in-depth look at ongoing research in simulation, material selection, polymer network control, integration new functionalities to achieve optimal performance. Furthermore, this discusses extensive outcomes addressing growing demand sustainable solutions. Building on knowledge, we highlight future direction displays.
Language: Английский
Citations
1