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Kong P, Ye Y, Zhang X, Bao X, Huo C. Alkylation of Glycine Derivatives through a Synergistic Single-Electron Transfer and Halogen-Atom Transfer Process. Org Lett 2024; 26:7507-7513. [PMID: 39207059 DOI: 10.1021/acs.orglett.4c02352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/04/2024]
Abstract
Here, we present a versatile method for forming C(sp3)-C(sp3) bonds, enabling the synthesis of a range of natural and non-natural amino acids. This approach utilizes readily available glycine derivatives and alkyl iodides, combining single-electron transfer and halogen-atom transfer processes. The utility of this step-economic and redox-economic C(sp3)-C(sp3) bond formation is further highlighted in the late-stage site-selective modifications of the glycine residue in short peptides.
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Affiliation(s)
- Peng Kong
- Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, People's Republic of China
| | - Youwan Ye
- Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, People's Republic of China
| | - Xin Zhang
- Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, People's Republic of China
| | - Xiazhen Bao
- Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, People's Republic of China
| | - Congde Huo
- Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, People's Republic of China
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2
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Body N, Bevernaegie R, Lefebvre C, Jabin I, Hermans S, Riant O, Troian-Gautier L. Photo-Catalyzed α-Arylation of Enol Acetate Using Recyclable Silica-Supported Heteroleptic and Homoleptic Copper(I) Photosensitizers. Chemistry 2023; 29:e202301212. [PMID: 37582678 DOI: 10.1002/chem.202301212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 07/14/2023] [Accepted: 08/15/2023] [Indexed: 08/17/2023]
Abstract
Earth-abundant photosensitizers are highly sought after for light-mediated applications, such as photoredox catalysis, depollution and energy conversion schemes. Homoleptic and heteroleptic copper(I) complexes are promising candidates in this field, as copper is abundant and the corresponding complexes are easily obtained in smooth conditions. However, some heteroleptic copper(I) complexes suffer from low (photo)stability that leads to the gradual formation of the corresponding homoleptic complex. Such degradation pathways are detrimental, especially when recyclability is desired. This study reports a novel approach for the heterogenization of homoleptic and heteroleptic Cu complexes on silica nanoparticles. In both cases, the photophysical properties upon surface immobilization were only slightly affected. Excited-state quenching with aryl diazonium derivatives occurred efficiently (108 -1010 M-1 s-1 ) with heterogeneous and homogeneous photosensitizers. Moderate but almost identical yields were obtained for the α-arylation of enol acetate using the homoleptic complex in homogeneous or heterogeneous conditions. Importantly, the silica-supported photocatalysts were recycled with moderate loss in photoactivity over multiple experiments. Transient absorption spectroscopy confirmed that excited-state electron transfer occurred from the homogeneous and heterogeneous homoleptic copper(I) complexes to aryl diazonium derivatives, generating the corresponding copper(II) center that persisted for several hundreds of microseconds, compatible with photoredox catalysis applications.
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Affiliation(s)
- Nathalie Body
- Université catholique de Louvain (UCLouvain), Institut de la Matière Condensée et des Nanosciences (IMCN), Molecular Chemistry, Materials and Catalysis (MOST), Place Louis Pasteur 1, bte L4.01.02, 1348, Louvain-la-Neuve, Belgium
| | - Robin Bevernaegie
- Université libre de Bruxelles (ULB), Service de Chimie et PhysicoChimie Organiques (CPCO), Laboratoire de Chimie Organique (LCO), Avenue F. D. Roosevelt 50, 1050, Bruxelles, Belgium
| | - Corentin Lefebvre
- Université catholique de Louvain (UCLouvain), Institut de la Matière Condensée et des Nanosciences (IMCN), Molecular Chemistry, Materials and Catalysis (MOST), Place Louis Pasteur 1, bte L4.01.02, 1348, Louvain-la-Neuve, Belgium
| | - Ivan Jabin
- Université libre de Bruxelles (ULB), Service de Chimie et PhysicoChimie Organiques (CPCO), Laboratoire de Chimie Organique (LCO), Avenue F. D. Roosevelt 50, 1050, Bruxelles, Belgium
| | - Sophie Hermans
- Université catholique de Louvain (UCLouvain), Institut de la Matière Condensée et des Nanosciences (IMCN), Molecular Chemistry, Materials and Catalysis (MOST), Place Louis Pasteur 1, bte L4.01.02, 1348, Louvain-la-Neuve, Belgium
| | - Olivier Riant
- Université catholique de Louvain (UCLouvain), Institut de la Matière Condensée et des Nanosciences (IMCN), Molecular Chemistry, Materials and Catalysis (MOST), Place Louis Pasteur 1, bte L4.01.02, 1348, Louvain-la-Neuve, Belgium
| | - Ludovic Troian-Gautier
- Université catholique de Louvain (UCLouvain), Institut de la Matière Condensée et des Nanosciences (IMCN), Molecular Chemistry, Materials and Catalysis (MOST), Place Louis Pasteur 1, bte L4.01.02, 1348, Louvain-la-Neuve, Belgium
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3
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Dumur F. Recent advances on water-soluble photoinitiators of polymerization. Eur Polym J 2023. [DOI: 10.1016/j.eurpolymj.2023.111942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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4
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Copper II Complexes Based on Benzimidazole Ligands as a Novel Photoredox Catalysis for Free Radical Polymerization Embedded Gold and Silver Nanoparticles. Polymers (Basel) 2023; 15:polym15051289. [PMID: 36904530 PMCID: PMC10007263 DOI: 10.3390/polym15051289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 02/24/2023] [Accepted: 02/26/2023] [Indexed: 03/08/2023] Open
Abstract
The copper II complex's novel benzimidazole Schiff base ligands were manufactured and gauged as a new photoredox catalyst/photoinitiator amalgamated with triethylamine (TEA) and iodonium salt (Iod) for the polymerization of ethylene glycol diacrylate while exposed to visible light by an LED Lamp at 405 nm with an intensity of 543 mW/cm2 at 28 °C. Gold and silver nanoparticles were obtained through the reactivity of the copper II complexes with amine/Iod salt. The size of NPs was around 1-30 nm. Lastly, the high performance of copper II complexes for photopolymerization containing nanoparticles is presented and examined. Ultimately, the photochemical mechanisms were observed using cyclic voltammetry. The preparation of the polymer nanocomposite nanoparticles in situ was photogenerated during the irradiation LED at 405 nm with an intensity of 543 mW/cm2 at 28 °C process. UV-Vis, FTIR, and TEM analyses were utilized for the determination of the generation of AuNPs and AgNPs which resided within the polymer matrix.
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5
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Dumur F. Recent Advances on Photoinitiating Systems Designed for Solar Photocrosslinking Polymerization Reactions. Eur Polym J 2023. [DOI: 10.1016/j.eurpolymj.2023.111988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023]
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6
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Dumur F. Recent Advances on Anthraquinone-based Photoinitiators of Polymerization. Eur Polym J 2023. [DOI: 10.1016/j.eurpolymj.2023.112039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
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7
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Recent Advances on Furan-Based Visible Light Photoinitiators of Polymerization. Catalysts 2023. [DOI: 10.3390/catal13030493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023] Open
Abstract
Photopolymerization is an active research field enabling to polymerize in greener conditions than that performed with traditional thermal polymerization. At present, a great deal of effort is devoted to developing visible light photoinitiating systems. Indeed, the traditional UV photoinitiating systems are currently the focus of numerous safety concerns so alternatives to UV light are being actively researched. However, visible light photons are less energetic than UV photons so the reactivity of the photoinitiating systems should be improved to address this issue. In this field, furane constitutes an interesting candidate for the design of photocatalysts of polymerization due to its low cost and its easy chemical modification. In this review, an overview concerning the design of furane-based photoinitiators is provided. Comparisons with reference systems are also established to demonstrate evidence of the interest of these photoinitiators in innovative structures.
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8
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Ripak A, De Kreijger S, Sampaio RN, Vincent CA, Cauët É, Jabin I, Tambar UK, Elias B, Troian-Gautier L. Photosensitized Activation of Diazonium Derivatives for C-B Bond Formation. CHEM CATALYSIS 2023; 3:100490. [PMID: 36936750 PMCID: PMC10022585 DOI: 10.1016/j.checat.2022.100490] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Aryl diazonium salts are ubiquitous building blocks in chemistry, as they are useful radical precursors in organic synthesis as well as for the functionalization of solid materials. They can be reduced electrochemically or through a photo-induced electron transfer reaction. Here we provide a detailed picture of the ground and excited-state reactivity of a series of 9 rare and earth abundant photosensitizers with 13 aryl diazonium salts, which also included 3 macrocyclic calix[4]arene tetradiazonium salts. Nanosecond transient absorption spectroscopy confirmed the occurrence of excited-state electron transfer and was used to quantify cage-escape yields, i.e. the efficiency with which the formed radicals separate and escape the solvent cage. Cage-escape yields were large; increased when the driving force for photo-induced electron transfer increased and also tracked with the C-N2 + bond cleavage propensity, amongst others. A photo-induced borylation reaction was then investigated with all the photosensitizers and proceeded with yields between 9 and 74%.
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Affiliation(s)
- Alexia Ripak
- Université catholique de Louvain (UCLouvain), Institut de la Matière Condensée et des Nanosciences (IMCN), Molecular Chemistry, Materials and Catalysis (MOST), Place Louis Pasteur 1, bte L4.01.02, 1348 Louvain-la-Neuve, Belgium
| | - Simon De Kreijger
- Université catholique de Louvain (UCLouvain), Institut de la Matière Condensée et des Nanosciences (IMCN), Molecular Chemistry, Materials and Catalysis (MOST), Place Louis Pasteur 1, bte L4.01.02, 1348 Louvain-la-Neuve, Belgium
| | - Renato N. Sampaio
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, 27599-3290, United States
| | - Cooper A. Vincent
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390-9038, United States
| | - Émilie Cauët
- Spectroscopy, Quantum Chemistry and Atmospheric Remote Sensing (CP 160/09), Université libre de Bruxelles (ULB), 50 av. F. D. Roosevelt, CP160/09, B-1050 Brussels, Belgium
| | - Ivan Jabin
- Laboratoire de Chimie Organique, Université libre de Bruxelles (ULB), Avenue F. D. Roosevelt 50, CP160/06, B-1050 Brussels, Belgium
| | - Uttam K. Tambar
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390-9038, United States
| | - Benjamin Elias
- Université catholique de Louvain (UCLouvain), Institut de la Matière Condensée et des Nanosciences (IMCN), Molecular Chemistry, Materials and Catalysis (MOST), Place Louis Pasteur 1, bte L4.01.02, 1348 Louvain-la-Neuve, Belgium
| | - Ludovic Troian-Gautier
- Université catholique de Louvain (UCLouvain), Institut de la Matière Condensée et des Nanosciences (IMCN), Molecular Chemistry, Materials and Catalysis (MOST), Place Louis Pasteur 1, bte L4.01.02, 1348 Louvain-la-Neuve, Belgium
- Lead contact
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9
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Le Dot M, Giacoletto N, Morlet-Savary F, Graff B, Monnier V, Gigmes D, Nechab M, Dumur F, Gerard P, Lalevée J. Synergistic Approach of Type I Hybrid Complexes for highly efficient Metal-based Initiating Strategies: Toward low energy-consuming polymerization for Thermoplastic Composite Implementation. Eur Polym J 2023. [DOI: 10.1016/j.eurpolymj.2023.111871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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10
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Recent Advances on Photobleachable Visible Light Photoinitiators of Polymerization. Eur Polym J 2023. [DOI: 10.1016/j.eurpolymj.2023.111874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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11
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Randhawa A, Dutta SD, Ganguly K, Patel DK, Patil TV, Lim KT. Recent Advances in 3D Printing of Photocurable Polymers: Types, Mechanism, and Tissue Engineering Application. Macromol Biosci 2023; 23:e2200278. [PMID: 36177687 DOI: 10.1002/mabi.202200278] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 09/09/2022] [Indexed: 01/19/2023]
Abstract
The conversion of liquid resin into solid structures upon exposure to light of a specific wavelength is known as photopolymerization. In recent years, photopolymerization-based 3D printing has gained enormous attention for constructing complex tissue-specific constructs. Due to the economic and environmental benefits of the biopolymers employed, photo-curable 3D printing is considered an alternative method for replacing damaged tissues. However, the lack of suitable bio-based photopolymers, their characterization, effective crosslinking strategies, and optimal printing conditions are hindering the extensive application of 3D printed materials in the global market. This review highlights the present status of various photopolymers, their synthesis, and their optimization parameters for biomedical applications. Moreover, a glimpse of various photopolymerization techniques currently employed for 3D printing is also discussed. Furthermore, various naturally derived nanomaterials reinforced polymerization and their influence on printability and shape fidelity are also reviewed. Finally, the ultimate use of those photopolymerized hydrogel scaffolds in tissue engineering is also discussed. Taken together, it is believed that photopolymerized 3D printing has a great future, whereas conventional 3D printing requires considerable sophistication, and this review can provide readers with a comprehensive approach to developing light-mediated 3D printing for tissue-engineering applications.
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Affiliation(s)
- Aayushi Randhawa
- Department of Biosystems Engineering, Kangwon National University, Chuncheon, 24341, Republic of Korea.,Interdisciplinary Program in Smart Agriculture, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Sayan Deb Dutta
- Department of Biosystems Engineering, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Keya Ganguly
- Department of Biosystems Engineering, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Dinesh K Patel
- Department of Biosystems Engineering, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Tejal V Patil
- Department of Biosystems Engineering, Kangwon National University, Chuncheon, 24341, Republic of Korea.,Interdisciplinary Program in Smart Agriculture, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Ki-Taek Lim
- Department of Biosystems Engineering, Kangwon National University, Chuncheon, 24341, Republic of Korea.,Interdisciplinary Program in Smart Agriculture, Kangwon National University, Chuncheon, 24341, Republic of Korea
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12
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Dumur F. Recent advances on benzylidene cyclopentanones as visible light photoinitiators of polymerization. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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13
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Beaudelot J, Oger S, Peruško S, Phan TA, Teunens T, Moucheron C, Evano G. Photoactive Copper Complexes: Properties and Applications. Chem Rev 2022; 122:16365-16609. [PMID: 36350324 DOI: 10.1021/acs.chemrev.2c00033] [Citation(s) in RCA: 65] [Impact Index Per Article: 32.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Photocatalyzed and photosensitized chemical processes have seen growing interest recently and have become among the most active areas of chemical research, notably due to their applications in fields such as medicine, chemical synthesis, material science or environmental chemistry. Among all homogeneous catalytic systems reported to date, photoactive copper(I) complexes have been shown to be especially attractive, not only as alternative to noble metal complexes, and have been extensively studied and utilized recently. They are at the core of this review article which is divided into two main sections. The first one focuses on an exhaustive and comprehensive overview of the structural, photophysical and electrochemical properties of mononuclear copper(I) complexes, typical examples highlighting the most critical structural parameters and their impact on the properties being presented to enlighten future design of photoactive copper(I) complexes. The second section is devoted to their main areas of application (photoredox catalysis of organic reactions and polymerization, hydrogen production, photoreduction of carbon dioxide and dye-sensitized solar cells), illustrating their progression from early systems to the current state-of-the-art and showcasing how some limitations of photoactive copper(I) complexes can be overcome with their high versatility.
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Affiliation(s)
- Jérôme Beaudelot
- Laboratoire de Chimie Organique, Service de Chimie et PhysicoChimie Organiques, Université libre de Bruxelles (ULB), Avenue F. D. Roosevelt 50 - CP160/06, 1050Brussels, Belgium.,Laboratoire de Chimie Organique et Photochimie, Service de Chimie et PhysicoChimie Organiques, Université libre de Bruxelles (ULB), Avenue F. D. Roosevelt 50 - CP160/08, 1050Brussels, Belgium
| | - Samuel Oger
- Laboratoire de Chimie Organique, Service de Chimie et PhysicoChimie Organiques, Université libre de Bruxelles (ULB), Avenue F. D. Roosevelt 50 - CP160/06, 1050Brussels, Belgium
| | - Stefano Peruško
- Laboratoire de Chimie Organique, Service de Chimie et PhysicoChimie Organiques, Université libre de Bruxelles (ULB), Avenue F. D. Roosevelt 50 - CP160/06, 1050Brussels, Belgium.,Organic Synthesis Division, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020Antwerp, Belgium
| | - Tuan-Anh Phan
- Laboratoire de Chimie Organique et Photochimie, Service de Chimie et PhysicoChimie Organiques, Université libre de Bruxelles (ULB), Avenue F. D. Roosevelt 50 - CP160/08, 1050Brussels, Belgium
| | - Titouan Teunens
- Laboratoire de Chimie Organique et Photochimie, Service de Chimie et PhysicoChimie Organiques, Université libre de Bruxelles (ULB), Avenue F. D. Roosevelt 50 - CP160/08, 1050Brussels, Belgium.,Laboratoire de Chimie des Matériaux Nouveaux, Université de Mons, Place du Parc 20, 7000Mons, Belgium
| | - Cécile Moucheron
- Laboratoire de Chimie Organique et Photochimie, Service de Chimie et PhysicoChimie Organiques, Université libre de Bruxelles (ULB), Avenue F. D. Roosevelt 50 - CP160/08, 1050Brussels, Belgium
| | - Gwilherm Evano
- Laboratoire de Chimie Organique, Service de Chimie et PhysicoChimie Organiques, Université libre de Bruxelles (ULB), Avenue F. D. Roosevelt 50 - CP160/06, 1050Brussels, Belgium
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Li Y, Shaukat U, Schlögl S, Xue T, Li J, Nie J, Zhu X. A Pyrrole–Carbazole Photoinitiator for Radical and Cationic Visible Light LED Photopolymerization. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Lin JT, Lalevee J, Cheng DC. Efficacy analysis of new copper complex for visible light (455, 530 nm) radical/cationic photopolymerization: The synergic effects and catalytic cycle. PLoS One 2022; 17:e0270679. [PMID: 35881581 PMCID: PMC9321381 DOI: 10.1371/journal.pone.0270679] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 06/14/2022] [Indexed: 02/02/2023] Open
Abstract
The kinetics and the conversion features of two 3-component systems (A/B/N), based on the proposed new kinetic schemes of Mokbel and Mau et al, in which a visible LED is used to excite a copper complex to its excited triplet state (G*). The coupling of G* with iodonium salt and ethyl 4-(dimethylamino)benzoate (EDB) produces both free radical polymerization (FRP) of acrylates and the free radical promoted cationic polymerization (CP) of epoxides using various new copper complex as the initiator. Higher FRP and CP conversion can be achieved by co-additive of [B] and N, via the dual function of (i) regeneration [A], and (ii) generation of extra radicals. The interpenetrated polymer network (IPN) capable of initiating both FRP and CP in a blend of TMPTA and EPOX. The synergic effects due to CP include: (i) CP can increase viscosity limiting the diffusional oxygen replenishment; (ii) the cation also acts as a diluting agent for the IPN network, and (iii) the exothermic property of the CP. The catalytic cycle, synergic effects, and the oxygen inhibition are theoretically confirmed to support the experimental hypothesis. The measured results of Mokbel and Mau et al are well analyzed and matching the predicted features of our modeling.
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Affiliation(s)
| | - Jacques Lalevee
- CNRS, IS2M UMR 7361, Université de Haute-Alsace, Mulhouse, France
| | - Da-Chuan Cheng
- Department of Biomedical Imaging and Radiological Science, China Medical University, Taichong, Taiwan, ROC
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Sandoval-Pauker C, Pinter B. Quasi-Restricted Orbital Description of the Copper(I) Photoredox Catalytic Cycle. J Chem Phys 2022; 157:074306. [DOI: 10.1063/5.0094380] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In this computational study, the electronic structure changes along the oxidative and reductive quenching cycles of a homoleptic and a heteroleptic prototype Cu(I) photoredox catalyst, namely [Cu(dmp)2]+ (dmp = 2,9-dimethyl-1,10-phenanthroline) and [Cu(phen)(POP)]+ (POP = bis[2-(diphenylphosphino)phenyl]ether) are scrutinized and characterized using quasi-restricted orbitals (QRO), electron density differences and spin densities. After validating our density functional theory-based computational protocol, the equilibrium geometries and wavefunctions (using QROs and atom/fragment compositions) of the four states involved in photoredox cycle (S0, T1, Dox and Dred) are systematically and thoroughly described. The formal ground and excited state ligand- and metal-centered redox events are substantiated by the QRO description of the open-shell triplet 3MLCT (d9L-1), Dox (d9L0) and Dred (d10L-1) species and the corresponding structural changes, e.g., flattening distortion, shortening/elongation of Cu-N/Cu-P bonds, are rationalized in terms of the underlying electronic structure transformations. Amongst others, we reveal the molecular-scale delocalization of the ligand-centered radical in the a 3MLCT (d9L-1) and Dred (d9L-1) states of homoleptic [Cu(dmp)2]+ and its localization to the redox-active phenanthroline ligand in the case of heteroleptic [Cu(phen)(POP)]+.
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Affiliation(s)
- Christian Sandoval-Pauker
- The University of Texas at El Paso Department of Chemistry and Biochemistry, United States of America
| | - Balazs Pinter
- Department of Chemistry and Biochemistry, The University of Texas at El Paso Department of Chemistry and Biochemistry, United States of America
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19
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Liu Z, Dumur F. Recent Advances on Visible Light Coumarin-based Oxime Esters as Initiators of Polymerization. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111449] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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20
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Novel Copper Complexes as Visible Light Photoinitiators for the Synthesis of Interpenetrating Polymer Networks (IPNs). Polymers (Basel) 2022; 14:polym14101998. [PMID: 35631880 PMCID: PMC9145974 DOI: 10.3390/polym14101998] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 05/07/2022] [Accepted: 05/09/2022] [Indexed: 12/16/2022] Open
Abstract
This work is devoted to the study of two copper complexes (Cu) bearing pyridine ligands, which were synthesized, evaluated and tested as new visible light photoinitiators for the free radical photopolymerization (FRP) of acrylates functional groups in thick and thin samples upon light-emitting diodes (LED) at 405 and 455 nm irradiation. These latter wavelengths are considered to be safe to produce polymer materials. The photoinitiation abilities of these organometallic compounds were evaluated in combination with an iodonium (Iod) salt and/or amine (e.g., N-phenylglycine—NPG). Interestingly, high final conversions and high polymerization rates were obtained for both compounds using two and three-component photoinitiating systems (Cu1 (or Cu2)/Iodonium salt (Iod) (0.1%/1% w/w) and Cu1 (or Cu2)/Iod/amine (0.1%/1%/1% w/w/w)). The new proposed copper complexes were also used for direct laser write experiments involving a laser diode at 405 nm, and for the photocomposite synthesis with glass fibers using a UV-conveyor at 395 nm. To explain the obtained polymerization results, different methods and characterization techniques were used: steady-state photolysis, real-time Fourier transform infrared spectroscopy (RT-FTIR), emission spectroscopy and cyclic voltammetry.
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22
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Yang T, Cheng Y, Wu Y, Yu B, Huang T, Yu H, Zhu M. Enhanced crosslinking of polypropylene in γ-irradiation via Copper(Ⅱ) doping. Radiat Phys Chem Oxf Engl 1993 2022. [DOI: 10.1016/j.radphyschem.2022.110042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Sandoval-Pauker C, Santander-Nelli M, Dreyse P. Thermally activated delayed fluorescence in luminescent cationic copper(i) complexes. RSC Adv 2022; 12:10653-10674. [PMID: 35425025 PMCID: PMC8985689 DOI: 10.1039/d1ra08082b] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Accepted: 03/27/2022] [Indexed: 01/02/2023] Open
Abstract
In this work, the photophysical characteristics of [Cu(N^N)2]+ and [Cu(N^N)(P^P)]+ complexes were described. The concept of thermally activated delayed fluorescence (TADF) and its development throughout the years was also explained. The importance of ΔE (S1-T1) and spin-orbital coupling (SOC) values on the TADF behavior of [Cu(N^N)2]+ and [Cu(N^N)(P^P)]+ complexes is discussed. Examples of ΔE (S1-T1) values reported in the literature were collected and some trends were proposed (e.g. the effect of the substituents at the 2,9 positions of the phenanthroline ligand). Besides, the techniques (or calculation methods) used for determining ΔE (S1-T1) values were described. The effect of SOC in TADF was also discussed, and examples of the determination of SOC values by DFT and TD-DFT calculations are provided. The last chapter covers the applications of [Cu(N^N)2]+ and [Cu(N^N)(P^P)]+ TADF complexes and the challenges that are still needed to be addressed to ensure the industrial applications of these compounds.
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Affiliation(s)
- Christian Sandoval-Pauker
- Department of Chemistry and Biochemistry, University of Texas at El Paso El Paso TX 79968 USA
- Departamento de Química, Universidad Técnica Federico Santa María Av. España 1680 Casilla 2390123 Valparaíso Chile
| | - Mireya Santander-Nelli
- Advanced Integrated Technologies (AINTECH) Chorrillo Uno, Parcela 21 Lampa Santiago Chile
- Centro Integrativo de Biología y Química Aplicada (CIBQA), Universidad Bernardo O'Higgins General Gana 1702 Santiago 8370854 Chile
| | - Paulina Dreyse
- Departamento de Química, Universidad Técnica Federico Santa María Av. España 1680 Casilla 2390123 Valparaíso Chile
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Borjigin T, Noirbent G, Gigmes D, Xiao P, Dumur F, Lalevée J. The new LED-Sensitive photoinitiators of Polymerization: Copper complexes in free radical and cationic photoinitiating systems and application in 3D printing. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2021.110885] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Xu C, Wu X, Xiong Y, Li Z, Tang H. A class of azocarbazole‐based carboxylates: High‐efficiency ionic unimolecular photobase generators for thiol‐epoxy click polymerization under blue light. JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1002/pol.20210549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Can Xu
- Engineering Research Center of Organosilicon Compounds and Materials, Ministry of Education, Sauvage Center for Molecular Sciences College of Chemistry and Molecular Sciences, Wuhan University Wuhan China
| | - Xiang Wu
- Engineering Research Center of Organosilicon Compounds and Materials, Ministry of Education, Sauvage Center for Molecular Sciences College of Chemistry and Molecular Sciences, Wuhan University Wuhan China
| | - Ying Xiong
- Engineering Research Center of Organosilicon Compounds and Materials, Ministry of Education, Sauvage Center for Molecular Sciences College of Chemistry and Molecular Sciences, Wuhan University Wuhan China
| | - Zhen Li
- Engineering Research Center of Organosilicon Compounds and Materials, Ministry of Education, Sauvage Center for Molecular Sciences College of Chemistry and Molecular Sciences, Wuhan University Wuhan China
| | - Hongding Tang
- Engineering Research Center of Organosilicon Compounds and Materials, Ministry of Education, Sauvage Center for Molecular Sciences College of Chemistry and Molecular Sciences, Wuhan University Wuhan China
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Zhao Y, Rollet M, Charles L, Canard G, Gigmes D, Vanelle P, Broggi J. Switching from Single to Simultaneous Free‐Radical and Anionic Polymerization with Enamine‐Based Organic Electron Donors. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202106733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Yuxi Zhao
- Aix Marseille Univ CNRS Institut de Chimie Radicalaire (ICR) 13013 Marseille France
| | - Marion Rollet
- Aix Marseille Univ CNRS Institut de Chimie Radicalaire (ICR) 13013 Marseille France
| | - Laurence Charles
- Aix Marseille Univ CNRS Institut de Chimie Radicalaire (ICR) 13013 Marseille France
| | - Gabriel Canard
- Aix Marseille Univ CNRS Centre Interdisciplinaire de Nanoscience de Marseille (CINaM) 13288 Marseille France
| | - Didier Gigmes
- Aix Marseille Univ CNRS Institut de Chimie Radicalaire (ICR) 13013 Marseille France
| | - Patrice Vanelle
- Aix Marseille Univ CNRS Institut de Chimie Radicalaire (ICR) 13013 Marseille France
| | - Julie Broggi
- Aix Marseille Univ CNRS Institut de Chimie Radicalaire (ICR) 13013 Marseille France
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Zhao Y, Rollet M, Charles L, Canard G, Gigmes D, Vanelle P, Broggi J. Switching from Single to Simultaneous Free-Radical and Anionic Polymerization with Enamine-Based Organic Electron Donors. Angew Chem Int Ed Engl 2021; 60:19389-19396. [PMID: 34157792 DOI: 10.1002/anie.202106733] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 06/18/2021] [Indexed: 11/09/2022]
Abstract
Although most monomers can polymerize through different propagation pathways, polymerization-initiating systems that can switch from one mode to another are rare. In this study, we demonstrate that enamine-based organic electron donors (OEDs) constitute the first systems able to initiate either free-radical or anionic polymerization under simple, mild, and safe conditions. While direct electron-transfer reduction of monomers by OEDs results in the initiation of anionic chain-growth polymerization, introduction of a competing oxidant with a higher reduction potential than the monomer switches the former anionic propagation to a clean radical-propagation process. The benefit of this dual-mode activator is highlighted in the synthesis of an interpenetrating polymer network through simultaneous initiation of radical and anionic propagation processes.
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Affiliation(s)
- Yuxi Zhao
- Aix Marseille Univ, CNRS, Institut de Chimie Radicalaire (ICR), 13013, Marseille, France
| | - Marion Rollet
- Aix Marseille Univ, CNRS, Institut de Chimie Radicalaire (ICR), 13013, Marseille, France
| | - Laurence Charles
- Aix Marseille Univ, CNRS, Institut de Chimie Radicalaire (ICR), 13013, Marseille, France
| | - Gabriel Canard
- Aix Marseille Univ, CNRS, Centre Interdisciplinaire de Nanoscience de Marseille (CINaM), 13288, Marseille, France
| | - Didier Gigmes
- Aix Marseille Univ, CNRS, Institut de Chimie Radicalaire (ICR), 13013, Marseille, France
| | - Patrice Vanelle
- Aix Marseille Univ, CNRS, Institut de Chimie Radicalaire (ICR), 13013, Marseille, France
| | - Julie Broggi
- Aix Marseille Univ, CNRS, Institut de Chimie Radicalaire (ICR), 13013, Marseille, France
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Concomitant initiation of radical and cationic polymerisations using new copper complexes as photoinitiators: Synthesis and characterisation of acrylate/epoxy interpenetrated polymer networks. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2021.110457] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Giacoletto N, Dumur F. Recent Advances in bis-Chalcone-Based Photoinitiators of Polymerization: From Mechanistic Investigations to Applications. Molecules 2021; 26:3192. [PMID: 34073491 PMCID: PMC8199041 DOI: 10.3390/molecules26113192] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Revised: 05/22/2021] [Accepted: 05/23/2021] [Indexed: 02/01/2023] Open
Abstract
Over the past several decades, photopolymerization has become an active research field, and the ongoing efforts to develop new photoinitiating systems are supported by the different applications in which this polymerization technique is involved-including dentistry, 3D and 4D printing, adhesives, and laser writing. In the search for new structures, bis-chalcones that combine two chalcones' moieties within a unique structure were determined as being promising photosensitizers to initiate both the free-radical polymerization of acrylates and the cationic polymerization of epoxides. In this review, an overview of the different bis-chalcones reported to date is provided. Parallel to the mechanistic investigations aiming at elucidating the polymerization mechanisms, bis-chalcones-based photoinitiating systems were used for different applications, which are detailed in this review.
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Affiliation(s)
| | - Frédéric Dumur
- Aix Marseille Univ, CNRS, ICR UMR 7273, F-13397 Marseille, France
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Giacoletto N, Ibrahim-Ouali M, Dumur F. Recent advances on squaraine-based photoinitiators of polymerization. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2021.110427] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Sun K, Liu S, Chen H, Morlet-Savary F, Graff B, Pigot C, Nechab M, Xiao P, Dumur F, Lalevée J. N-ethyl carbazole-1-allylidene-based push-pull dyes as efficient light harvesting photoinitiators for sunlight induced polymerization. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2021.110331] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Bagheri A, Fellows CM, Boyer C. Reversible Deactivation Radical Polymerization: From Polymer Network Synthesis to 3D Printing. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:2003701. [PMID: 33717856 PMCID: PMC7927619 DOI: 10.1002/advs.202003701] [Citation(s) in RCA: 57] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 12/11/2020] [Indexed: 05/04/2023]
Abstract
3D printing has changed the fabrication of advanced materials as it can provide customized and on-demand 3D networks. However, 3D printing of polymer materials with the capacity to be transformed after printing remains a great challenge for engineers, material, and polymer scientists. Radical polymerization has been conventionally used in photopolymerization-based 3D printing, as in the broader context of crosslinked polymer networks. Although this reaction pathway has shown great promise, it offers limited control over chain growth, chain architecture, and thus the final properties of the polymer networks. More fundamentally, radical polymerization produces dead polymer chains incapable of postpolymerization transformations. Alternatively, the application of reversible deactivation radical polymerization (RDRP) to polymer networks allows the tuning of network homogeneity and more importantly, enables the production of advanced materials containing dormant reactivatable species that can be used for subsequent processes in a postsynthetic stage. Consequently, the opportunities that (photoactivated) RDRP-based networks offer have been leveraged through the novel concepts of structurally tailored and engineered macromolecular gels, living additive manufacturing and photoexpandable/transformable-polymer networks. Herein, the advantages of RDRP-based networks over irreversibly formed conventional networks are discussed.
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Affiliation(s)
- Ali Bagheri
- School of Science and TechnologyThe University of New EnglandArmidaleNSW2351Australia
| | - Christopher M. Fellows
- School of Science and TechnologyThe University of New EnglandArmidaleNSW2351Australia
- Desalination Technologies Research InstituteAl Jubail31951Kingdom of Saudi Arabia
| | - Cyrille Boyer
- Centre for Advanced Macromolecular Design (CAMD) and Australian Centre for NanoMedicine (ACN)School of Chemical EngineeringThe University of New South WalesSydneyNSW2052Australia
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Mudi PK, Mahato RK, Joshi M, Shit M, Choudhury AR, Das HS, Biswas B. Copper(II) complexes with a benzimidazole functionalized Schiff base: Synthesis, crystal structures, and role of ancillary ions in phenoxazinone synthase activity. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6211] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
| | | | - Mayank Joshi
- Department of Chemical Sciences Indian Institute of Science Education and Research Mohali Punjab India
| | - Madhusudan Shit
- Department of Chemistry Dinobandhu Andrews College Kolkata India
| | - Angshuman Roy Choudhury
- Department of Chemical Sciences Indian Institute of Science Education and Research Mohali Punjab India
| | - Hari Sankar Das
- Department of Chemistry University of North Bengal Darjeeling India
| | - Bhaskar Biswas
- Department of Chemistry University of North Bengal Darjeeling India
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Zhang Y, Xu Y, Simon-Masseron A, Lalevée J. Radical photoinitiation with LEDs and applications in the 3D printing of composites. Chem Soc Rev 2021; 50:3824-3841. [PMID: 33523055 DOI: 10.1039/d0cs01411g] [Citation(s) in RCA: 61] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Radical initiation upon LED light irradiation is discussed herein as well as its application in additive manufacturing. The ability of manufacturing complex structures, freedom of design, low energy consumption, fast prototyping, and excellent spatial resolution are the main benefits of the 3D printing technology by photopolymerization. Therefore, the 3D printing of composites through photopolymerization processes is developing rapidly in the academia and industry, and has been a turning point of additive manufacturing (AM). In the present review, an overview of radical initiation with LEDs (i.e., the photopolymerization LED technology, the photoinitiating systems, and the polymerizable media) and of the main 3D printing methods by photopolymerization, materials, and their applications in different fields has been carried out. As a challenging topic, the issue of light penetration in a filled matrix for the access to composites is discussed, including the light transmittance of the composite, the mismatch of the refractive index between the filler and the monomer, the factors of the filler, and the adverse influence of low light penetration on the 3D printing process. In particular, the popular applications of 3D printing by photopolymerization in biomedical science, electronic industry, materials for adsorption, and 4D printing are discussed. Overall, this review gives an overview of the 3D printing of polymer matrix composites through photopolymerization processes as a benchmark for future research and development.
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Affiliation(s)
- Yijun Zhang
- Université de Haute-Alsace, CNRS, IS2M UMR 7361, F-68100 Mulhouse, France.
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Dumur F. Recent advances on visible light photoinitiators of polymerization based on Indane-1,3-dione and related derivatives. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2020.110178] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Hammoud F, Rahal M, Egly J, Morlet-Savary F, Hijazi A, Bellemin-Laponnaz S, Mauro M, Lalevée J. Cubane Cu 4I 4(phosphine) 4 complexes as new co-initiators for free radical photopolymerization: towards aromatic amine-free systems. Polym Chem 2021. [DOI: 10.1039/d1py00277e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The investigation of copper-iodide cubane derivatives as new co-initiators for the free radical polymerization (FRP) of acrylate monomers under mild irradiation conditions is described here for the first time.
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Affiliation(s)
- Fatima Hammoud
- Université de Haute-Alsace
- CNRS
- IS2 M UMR7361
- F-68100 Mulhouse
- France
| | - Mahmoud Rahal
- Université de Haute-Alsace
- CNRS
- IS2 M UMR7361
- F-68100 Mulhouse
- France
| | - Julien Egly
- Université de Strasbourg
- CNRS
- Institut de Physique et Chimie des Matériaux de Strasbourg
- UMR7504
- 67000 Strasbourg
| | | | | | - Stéphane Bellemin-Laponnaz
- Université de Strasbourg
- CNRS
- Institut de Physique et Chimie des Matériaux de Strasbourg
- UMR7504
- 67000 Strasbourg
| | - Matteo Mauro
- Université de Strasbourg
- CNRS
- Institut de Physique et Chimie des Matériaux de Strasbourg
- UMR7504
- 67000 Strasbourg
| | - Jacques Lalevée
- Université de Haute-Alsace
- CNRS
- IS2 M UMR7361
- F-68100 Mulhouse
- France
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Abdallah M, Hijazi A, Cozzi PG, Gualandi A, Dumur F, Lalevée J. Boron Compounds as Additives for the Cationic Polymerization Using Coumarin Derivatives in Epoxy Silicones. MACROMOL CHEM PHYS 2020. [DOI: 10.1002/macp.202000404] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Mira Abdallah
- Université de Haute‐Alsace CNRS, IS2M UMR 7361 Mulhouse F‐68100 France
- Université de Strasbourg Strasbourg F‐67081 France
- EDST Université Libanaise Campus Hariri, Hadath Beirut Lebanon
| | - Akram Hijazi
- EDST Université Libanaise Campus Hariri, Hadath Beirut Lebanon
| | - Pier Giorgio Cozzi
- Dipartimento di Chimica “G. Ciamician” ALMA MATER STUDIORUM Università di Bologna Via Selmi 2 Bologna 40126 Italy
| | - Andrea Gualandi
- Dipartimento di Chimica “G. Ciamician” ALMA MATER STUDIORUM Università di Bologna Via Selmi 2 Bologna 40126 Italy
| | - Frederic Dumur
- Aix Marseille University CNRS, ICR UMR 7273 F‐13397 Marseille France
| | - Jacques Lalevée
- Université de Haute‐Alsace CNRS, IS2M UMR 7361 Mulhouse F‐68100 France
- Université de Strasbourg Strasbourg F‐67081 France
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Liu DY, Liu X, Gao Y, Wang CQ, Tian JS, Loh TP. Decarboxylative C-H Alkylation of Heteroarene N-Oxides by Visible Light/Copper Catalysis. Org Lett 2020; 22:8978-8983. [PMID: 33174421 DOI: 10.1021/acs.orglett.0c03382] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This paper reports a highly site-selective alkylation of heteroarene N-oxides using hypervalent iodine(III) carboxylates to serve as an alkylating agent in the presence of a cheap copper catalyst under visible light conditions. This mild method proceeds at room temperature in an air atmosphere and can withstand various heteroarene N-oxides as well as various primary, secondary, and tertiary alkyl carboxylic acids. It also provides a practical method for enabling the rapid conversion of commercially available raw materials into medically relevant "drug-like" molecules.
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Affiliation(s)
- Duan-Yang Liu
- Institute of Advanced Synthesis (IAS), Nanjing Tech University (NanjingTech), Nanjing 211816, P. R. China
| | - Xu Liu
- Institute of Advanced Synthesis (IAS), Nanjing Tech University (NanjingTech), Nanjing 211816, P. R. China
| | - Yan Gao
- Institute of Advanced Synthesis (IAS), Northwestern Polytechnical University (NPU), Xi'an 710072, China.,Yangtze River Delta Research Institute of Northwestern Polytechnical University, Taicang, Jiangsu 215400, China
| | - Chao-Qun Wang
- Institute of Advanced Synthesis (IAS), Nanjing Tech University (NanjingTech), Nanjing 211816, P. R. China
| | - Jie-Sheng Tian
- Institute of Advanced Synthesis (IAS), Northwestern Polytechnical University (NPU), Xi'an 710072, China.,Yangtze River Delta Research Institute of Northwestern Polytechnical University, Taicang, Jiangsu 215400, China.,Institute of Advanced Synthesis (IAS), Nanjing Tech University (NanjingTech), Nanjing 211816, P. R. China
| | - Teck-Peng Loh
- Institute of Advanced Synthesis (IAS), Northwestern Polytechnical University (NPU), Xi'an 710072, China.,Yangtze River Delta Research Institute of Northwestern Polytechnical University, Taicang, Jiangsu 215400, China.,Institute of Advanced Synthesis (IAS), Nanjing Tech University (NanjingTech), Nanjing 211816, P. R. China.,Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
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Cu(I) photosensitizers with alkylated diphosphines: Towards enhancing photostability and architecture extension. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119876] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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48
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Cationic Photopolymerization Initiated by a Photocatalytic Complex Sensitive to Visible Light at 520 nm. Catal Letters 2020. [DOI: 10.1007/s10562-020-03437-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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49
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Novel Push–Pull Dyes Derived from 1H-cyclopenta[b]naphthalene-1,3(2H)-dione as Versatile Photoinitiators for Photopolymerization and Their Related Applications: 3D Printing and Fabrication of Photocomposites. Catalysts 2020. [DOI: 10.3390/catal10101196] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
A series of eleven push–pull chromophores with specific structures have been designed for the free radical polymerization of acrylates, but also for the fabrication of photocomposites and 3D-printed structures. New photoinitiating systems comprising the different push–pull dyes showed excellent photochemical reactivities at 405 nm. Notably, polymerization reactions could be initiated with light-emitting diodes (LEDs) which constitute a unique opportunity to promote the free radical polymerization under mild conditions, i.e., low light intensity (e.g., sunlight) and under air. Photopolymerization is an active research field, and push–pull dyes have already been investigated for this purpose. Besides, it remains of crucial interest to investigate new reactive structures capable of efficiently initiating photopolymerization reactions. The plausible potential of these structures to act as efficient photoinitiators in vat photopolymerization (or 3D printing) and fabrication of photocomposites prompts us to select eleven new push–pull dyes to design multi-component photoinitiating systems activable with LEDs emitting at 405 nm. Precisely, a tertiary amine, i.e., ethyl dimethylaminobenzoate (EDB) used as an electron/hydrogen donor and an iodonium salt used as an electron acceptor were selected to behave as powerful co-initiators to construct three-component photoinitiating systems (PISs) with the different push–pull dyes. Among these new PISs, dye 8 and 9-based PISs could efficiently promote the free radical photopolymerization of acrylates upon exposure to a LED emitting at 405 nm also upon sunlight irradiation, highlighting their huge performance. Photoinitiating abilities could be explained on the basis of steady state photolysis experiments. Fluorescence measurements and electron spin resonance (ESR) spin-trapping experiments were also performed to obtain a deeper insight into the chemical mechanisms supporting the polymerization reaction and determine the way the initiating species, i.e., the radicals, are observed. Finally, two investigated dye-based PISs were applied to the fabrications of photocomposites. Three-dimensional patterns with excellent spatial resolutions were generated by the laser writing technique to identify the effects of photopolymerization of acrylates both in the absence and presence of fillers (silica). Interestingly, comparison between the 3D objects fabricated by the PISs/monomer systems and the PISs/monomer/filler photocomposites indicates that the newly designed photocomposites are suitable for practical applications.
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Tar H, Kashar TI, Kouki N, Aldawas R, Graff B, Lalevée J. Novel Copper Photoredox Catalysts for Polymerization: An In Situ Synthesis of Metal Nanoparticles. Polymers (Basel) 2020; 12:polym12102293. [PMID: 33036390 PMCID: PMC7599841 DOI: 10.3390/polym12102293] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2020] [Revised: 10/01/2020] [Accepted: 10/05/2020] [Indexed: 01/31/2023] Open
Abstract
The copper II complex (HLCuCl) carrying 2,4 dinitrophenylhydrazone (L) is synthesized and evaluated as a new photoredox catalyst/photoinitiator in combination with triethylamine (TEA) and iodonium salt (Iod) for the radical polymerization of ethylene glycol diacrylate during exposure to visible light using a photoreactor at 419 nm. The copper complex reactivity with TEA/Iod salt/gold chloride showed a good production and stability of gold nanoparticles. Finally, the high performance of Cu (II) complex for radical photopolymerization incorporating gold nanoparticles is provided. The photochemical mechanisms for the production of initiating radicals are studied using cyclic voltammetry. Polymer nanocomposites containing gold nanoparticles (Au NPs) in situ photogenerated during the irradiation process were prepared. The formation of Au NPs inside the polymer matrix was through UV-Vis and EDS/SEM analyses.
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Affiliation(s)
- Haja Tar
- Department of Chemistry, College of Science, Qassim University, King Abdulaziz Rd, Buraydah, Qassim 1162 SA, Saudi Arabia; (N.K.); (R.A.)
- Correspondence: ; Tel.: +966-16-30-13490
| | - Tahani I. Kashar
- Department of Chemistry, Faculty of Science, Menoufia University, Shebin El-Kom 32511, Egypt;
| | - Noura Kouki
- Department of Chemistry, College of Science, Qassim University, King Abdulaziz Rd, Buraydah, Qassim 1162 SA, Saudi Arabia; (N.K.); (R.A.)
| | - Reema Aldawas
- Department of Chemistry, College of Science, Qassim University, King Abdulaziz Rd, Buraydah, Qassim 1162 SA, Saudi Arabia; (N.K.); (R.A.)
| | - Bernadette Graff
- Institut de Science des Matériaux de Mulhouse IS2M – UMR CNRS 7361 – UHA, 15, rue Jean Starcky, 68057 Mulhouse CEDEX, France; (B.G.); (J.L.)
| | - Jacques Lalevée
- Institut de Science des Matériaux de Mulhouse IS2M – UMR CNRS 7361 – UHA, 15, rue Jean Starcky, 68057 Mulhouse CEDEX, France; (B.G.); (J.L.)
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