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Yu C, Choi J, Lee J, Lim S, Park Y, Jo SM, Ahn J, Kim SY, Chang T, Boyer C, Kwon MS. Functional Thermoplastic Polyurethane Elastomers with α, ω-Hydroxyl End-Functionalized Polyacrylates. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2403048. [PMID: 39171759 DOI: 10.1002/adma.202403048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 08/05/2024] [Indexed: 08/23/2024]
Abstract
Thermoplastic polyurethane (TPU) is an essential class of materials for demanding applications, from soft robotics and electronics to medical devices and batteries. However, traditional TPU development is primarily relied on specific soft segments, such as polyether, polyester, and polycarbonate polyols. Here, a novel method is introduced for developing TPU elastomers with enhanced performance and superior functionalities compared to conventional TPUs, achieved through the use of α,ω-hydroxyl end-functionalized polyacrylates. This approach involves a defect-free synthesis of α,ω-hydroxyl end-functionalized polyacrylates through visible-light-driven photoiniferter polymerization. By strategically blending these functionalized polyacrylates with conventional polyols, TPUs that exhibit exceptional toughness and notable self-healing capabilities, traits rarely found in existing TPUs are engineered. Furthermore, incorporating photo-crosslinkable acrylic monomers has enabled the creation of the first TPU with superior elastomeric properties and photopatterning capabilities. This approach paves the way for a new direction in polyurethane engineering, introducing a novel class of soft segments and unlocking the potential for a wide range of advanced applications.
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Affiliation(s)
- Changhoon Yu
- Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul, 08826, Republic of Korea
| | - Jinho Choi
- Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul, 08826, Republic of Korea
| | - Jungwook Lee
- Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul, 08826, Republic of Korea
| | - Sumin Lim
- Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul, 08826, Republic of Korea
| | - Youngjoo Park
- Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul, 08826, Republic of Korea
| | - Seong Min Jo
- Department of Chemical and Biological Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Junyoung Ahn
- Department of Chemistry and Division of Advanced Materials Science, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea
| | - So Youn Kim
- Department of Chemical and Biological Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Taihyun Chang
- Department of Chemistry and Division of Advanced Materials Science, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea
| | - Cyrille Boyer
- Cluster for Advanced Macromolecular Design (CAMD), School of Chemical Engineering, and Australian Centre for Nanomedicine, School of Chemical Engineering, UNSW Australia, Sydney, NSW, 2052, Australia
| | - Min Sang Kwon
- Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul, 08826, Republic of Korea
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2
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Xie G, Wu J, Zhang L, Tan J. Efficient Synthesis of μ-A(BC)C Miktoarm Star Polymer Assemblies via Aqueous Photoinitiated Polymerization-Induced Self-Assembly. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024. [PMID: 39088262 DOI: 10.1021/acs.langmuir.4c02131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/02/2024]
Abstract
In this study, green light-activated photoiniferter reversible addition-fragmentation chain transfer (RAFT) polymerization of glycerol methacrylate was performed using an ω,ω-heterodifunctional macro-RAFT agent. Because of the different RAFT controllability of two RAFT groups toward methacrylic monomers, only one RAFT group was activated under green light irradiation, leading to the formation of a diblock copolymer macro-RAFT agent with one RAFT group located at the chain end and the other RAFT group located between two blocks. The obtained diblock copolymer macro-RAFT agent was then used to mediate aqueous photoinitiated RAFT dispersion polymerization of diacetone acrylamide (DAAM), which formed μ-A(BC)C miktoarm star polymer assemblies with a diverse set of morphologies. Comparing with the ABC triblock copolymer, it was found that the architecture of the μ-A(BC)C miktoarm star polymer facilitated the formation of higher-order morphologies. Kinetic studies indicated that the aqueous photoinitiated RAFT dispersion polymerization exhibited ultrafast polymerization behavior, with quantitative monomer conversion being achieved within 5 min. Size exclusion chromatography analysis confirmed that good RAFT control was maintained during the polymerization. A morphological phase diagram for μ-A(BC)C miktoarm star polymer assemblies was constructed by varying the monomer concentration and the [DAAM]/[Macro-RAFT] ratio. We expect that this study not only develops an approach for the preparation of miktoarm star polymer assemblies but also provides mechanistic insights into the polymerization-induced self-assembly of nonlinear polymers.
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Affiliation(s)
- Gangyu Xie
- Department of Polymeric Materials and Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China
| | - Jiarui Wu
- Department of Polymeric Materials and Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China
| | - Li Zhang
- Department of Polymeric Materials and Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China
- Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter, Guangzhou 510006, China
| | - Jianbo Tan
- Department of Polymeric Materials and Engineering, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China
- Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter, Guangzhou 510006, China
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3
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Jazani AM, Murata H, Cvek M, Lewandowska-Andralojc A, Bernat R, Kapil K, Hu X, De Luca Bossa F, Szczepaniak G, Matyjaszewski K. Aqueous photo-RAFT polymerization under ambient conditions: synthesis of protein-polymer hybrids in open air. Chem Sci 2024; 15:9742-9755. [PMID: 38939137 PMCID: PMC11206215 DOI: 10.1039/d4sc01409j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Accepted: 05/01/2024] [Indexed: 06/29/2024] Open
Abstract
A photoinduced reversible addition-fragmentation chain-transfer (photo-RAFT) polymerization technique in the presence of sodium pyruvate (SP) and pyruvic acid derivatives was developed. Depending on the wavelength of light used, SP acted as a biocompatible photoinitiator or promoter for polymerization, allowing rapid open-to-air polymerization in aqueous media. Under UV irradiation (370 nm), SP decomposes to generate CO2 and radicals, initiating polymerization. Under blue (450 nm) or green (525 nm) irradiation, SP enhances the polymerization rate via interaction with the excited state RAFT agent. This method enabled the polymerization of a range of hydrophilic monomers in reaction volumes up to 250 mL, eliminating the need to remove radical inhibitors from the monomers. In addition, photo-RAFT polymerization using SP allowed for the facile synthesis of protein-polymer hybrids in short reaction times (<1 h), low organic content (≤16%), and without rigorous deoxygenation and the use of transition metal photocatalysts. Enzymatic studies of a model protein (chymotrypsin) showed that despite a significant loss of protein activity after conjugation with RAFT chain transfer agents, the grafting polymers from proteins resulted in a 3-4-fold recovery of protein activity.
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Affiliation(s)
- Arman Moini Jazani
- Department of Chemistry, Carnegie Mellon University 4400 Fifth Avenue Pittsburgh PA 15213 USA
| | - Hironobu Murata
- Department of Chemistry, Carnegie Mellon University 4400 Fifth Avenue Pittsburgh PA 15213 USA
| | - Martin Cvek
- Department of Chemistry, Carnegie Mellon University 4400 Fifth Avenue Pittsburgh PA 15213 USA
- Centre of Polymer Systems, Tomas Bata University in Zlin Trida T. Bati 5678 76001 Zlin Czech Republic
| | - Anna Lewandowska-Andralojc
- Faculty of Chemistry, Adam Mickiewicz University Uniwersytetu Poznanskiego 8 61-614 Poznan Poland
- Center for Advanced Technology, Adam Mickiewicz University Uniwersytetu Poznanskiego 10 61-614 Poznan Poland
| | - Roksana Bernat
- Department of Chemistry, Carnegie Mellon University 4400 Fifth Avenue Pittsburgh PA 15213 USA
- Institute of Materials Engineering, University of Silesia 75 Pulku Piechoty 1A 41-500 Chorzow Poland
| | - Kriti Kapil
- Department of Chemistry, Carnegie Mellon University 4400 Fifth Avenue Pittsburgh PA 15213 USA
| | - Xiaolei Hu
- Department of Chemistry, Carnegie Mellon University 4400 Fifth Avenue Pittsburgh PA 15213 USA
| | | | - Grzegorz Szczepaniak
- Department of Chemistry, Carnegie Mellon University 4400 Fifth Avenue Pittsburgh PA 15213 USA
- Faculty of Chemistry, University of Warsaw Pasteura 1 02-093 Warsaw Poland
| | - Krzysztof Matyjaszewski
- Department of Chemistry, Carnegie Mellon University 4400 Fifth Avenue Pittsburgh PA 15213 USA
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4
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Berrow SR, Mandle RJ, Raistrick T, Reynolds M, Gleeson HF. Toward Monodomain Nematic Liquid Crystal Elastomers of Arbitrary Thickness through PET-RAFT Polymerization. Macromolecules 2024; 57:5218-5229. [PMID: 38882196 PMCID: PMC11171763 DOI: 10.1021/acs.macromol.4c00245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Revised: 03/21/2024] [Accepted: 05/16/2024] [Indexed: 06/18/2024]
Abstract
Liquid crystal elastomers (LCEs) are polymeric materials that are proposed for a range of applications. However, to reach their full potential, it is desirable to have as much flexibility as possible in terms of the sample dimensions, while maintaining well-defined alignment. In this work, photoinduced electron/energy transfer reversible addition-fragmentation chain transfer (PET-RAFT) polymerization is applied to the synthesis of LCEs for the first time. An initial LCE layer (∼100 μm thickness) is partially cured before a second layer of the precursor mixture is added. The curing reaction is then resumed and is observed by FTIR to complete within 15 min of irradiation, yielding samples of increased thickness. Monodomain samples that exhibit an auxetic response and are of thickness 250-300 μm are consistently achieved. All samples are characterized thermally, mechanically, and in terms of their order parameters. The LCEs have physical properties comparable to those of analogous LCEs produced via free-radical polymerization.
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Affiliation(s)
- Stuart R Berrow
- School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, U.K
| | - Richard J Mandle
- School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, U.K
- School of Chemistry, University of Leeds, Leeds LS2 9JT, U.K
| | - Thomas Raistrick
- School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, U.K
| | - Matthew Reynolds
- School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, U.K
| | - Helen F Gleeson
- School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, U.K
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5
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Ayurini M, Haridas D, Mendoza DJ, Garnier G, Hooper JF. RAFT Polymerisation by the Radical Decarboxylation of Carboxylic Acids. Angew Chem Int Ed Engl 2024; 63:e202317071. [PMID: 37990056 DOI: 10.1002/anie.202317071] [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: 11/09/2023] [Revised: 11/20/2023] [Accepted: 11/21/2023] [Indexed: 11/23/2023]
Abstract
The controlled grafting of polymers from small- and macro-molecular substrates is an essential process for many advanced polymer applications. This usually requires the pre-functionalisation of substrates with an appropriate functional group, such as a RAFT agent or ATRP initiator, which requires additional synthetic steps. In this paper, we describe the direct grafting of RAFT polymers from carboxylate containing small molecules and polymers via photochemical radical decarboxylation. This method utilises the innate functional groups present in the substrates, and achieves efficient polymer initiation in a single step with excellent control of molecular weight and dispersity.
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Affiliation(s)
- Meri Ayurini
- School of Chemistry, Monash University, Clayton, 3800, Victoria, Australia
- Bioresource Processing Research Institute of Australia (BioPRIA), Monash University, Clayton, Victoria, 3800, Australia
| | - Darsan Haridas
- School of Chemistry, Monash University, Clayton, 3800, Victoria, Australia
- Bioresource Processing Research Institute of Australia (BioPRIA), Monash University, Clayton, Victoria, 3800, Australia
| | - David Joram Mendoza
- Bioresource Processing Research Institute of Australia (BioPRIA), Monash University, Clayton, Victoria, 3800, Australia
- Department of Chemical and Biological Engineering, Monash University, Clayton, Victoria, 3800, Australia
| | - Gil Garnier
- Bioresource Processing Research Institute of Australia (BioPRIA), Monash University, Clayton, Victoria, 3800, Australia
- Department of Chemical and Biological Engineering, Monash University, Clayton, Victoria, 3800, Australia
| | - Joel F Hooper
- School of Chemistry, Monash University, Clayton, 3800, Victoria, Australia
- Bioresource Processing Research Institute of Australia (BioPRIA), Monash University, Clayton, Victoria, 3800, Australia
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6
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Ma Q, Qiao GG, An Z. Visible Light Photoiniferter Polymerization for Dispersity Control in High Molecular Weight Polymers. Angew Chem Int Ed Engl 2023; 62:e202314729. [PMID: 37814139 DOI: 10.1002/anie.202314729] [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: 10/01/2023] [Revised: 10/07/2023] [Accepted: 10/09/2023] [Indexed: 10/11/2023]
Abstract
The synthesis of polymers with high molecular weights, controlled sequence, and tunable dispersities remains a challenge. A simple and effective visible-light controlled photoiniferter reversible addition-fragmentation chain transfer (RAFT) polymerization is reported here to realize this goal. Key to this strategy is the use of switchable RAFT agents (SRAs) to tune polymerization activities coupled with the inherent highly living nature of photoiniferter RAFT polymerization. The polymerization activities of SRAs were in situ adjusted by the addition of acid. In addition to a switchable chain-transfer coefficient, photolysis and polymerization kinetic studies revealed that neutral and protonated SRAs showed different photolysis and polymerization rates, which is unique to photoiniferter RAFT polymerization in terms of dispersity control. This strategy features no catalyst, no exogenous radical source, temporal regulation by visible light, and tunable dispersities in the unprecedented high molecular weight regime (up to 500 kg mol-1 ). Pentablock copolymers with three different dispersity combinations were also synthesized, highlighting that the highly living nature was maintained even for blocks with large dispersities. Tg was lowered for high-dispersity polymers of similar MWs due to the existence of more low-MW polymers. This strategy holds great potential for the synthesis of advanced materials with controlled molecular weight, dispersity and sequence.
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Affiliation(s)
- Qingchi Ma
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, China
| | - Greg G Qiao
- Department of Chemical Engineering, University of Melbourne, Parkville, Melbourne, Victoria, 3010, Australia
| | - Zesheng An
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, China
- Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education, School of Life Sciences, Jilin University, Changchun, 130012, China
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7
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Wu Z, Boyer C. Near-Infrared Light-Induced Reversible Deactivation Radical Polymerization: Expanding Frontiers in Photopolymerization. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2304942. [PMID: 37750445 PMCID: PMC10667859 DOI: 10.1002/advs.202304942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 09/08/2023] [Indexed: 09/27/2023]
Abstract
Photoinduced reversible deactivation radical polymerization (photo-RDRP) or photoinduced controlled/living radical polymerization has emerged as a versatile and powerful technique for preparing functional and advanced polymer materials under mild conditions by harnessing light energy. While UV and visible light (λ = 400-700 nm) are extensively employed in photo-RDRP, the utilization of near-infrared (NIR) wavelengths (λ = 700-2500 nm) beyond the visible region remains relatively unexplored. NIR light possesses unique properties, including enhanced light penetration, reduced light scattering, and low biomolecule absorption, thereby providing opportunities for applying photo-RDRP in the fields of manufacturing and medicine. This comprehensive review categorizes all known NIR light-induced RDRP (NIR-RDRP) systems into four mechanism-based types: mediation by upconversion nanoparticles, mediation by photocatalysts, photothermal conversion, and two-photon absorption. The distinct photoinitiation pathways associated with each mechanism are discussed. Furthermore, this review highlights the diverse applications of NIR-RDRP reported to date, including 3D printing, polymer brush fabrication, drug delivery, nanoparticle synthesis, and hydrogel formation. By presenting these applications, the review underscores the exceptional capabilities of NIR-RDRP and offers guidance for developing high-performance and versatile photopolymerization systems. Exploiting the unique properties of NIR light unlocks new opportunities for synthesizing functional and advanced polymer materials.
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Affiliation(s)
- Zilong Wu
- Cluster for Advanced Macromolecular Design and Australian Centre for NanoMedicineSchool of Chemical EngineeringThe University of New South WalesSydneyNSW2052Australia
| | - Cyrille Boyer
- Cluster for Advanced Macromolecular Design and Australian Centre for NanoMedicineSchool of Chemical EngineeringThe University of New South WalesSydneyNSW2052Australia
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8
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Tanaka J, Li J, Clouthier SM, You W. Step-growth polymerization by the RAFT process. Chem Commun (Camb) 2023. [PMID: 37287313 DOI: 10.1039/d3cc01087b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Reversible Addition-Fragmentation Chain Transfer (RAFT) step-growth polymerization is an emerging method that synergistically combines the benefits of RAFT polymerization (functional group and user-friendly nature) and step-growth polymerization (versatility of the polymer backbone). This new polymerization method is generally achieved by using bifunctional reagents of monomer and Chain Transfer Agent (CTA), that efficiently yield Single Monomer Unit Insertion (SUMI) adducts under stoichiometrically balanced conditions. This review covers a brief history of the RAFT-SUMI process and its transformation into RAFT step-growth polymerization, followed by a comprehensive discussion of various RAFT step-growth systems. Furthermore, characterizing the molecular weight evolution of step-growth polymerization is elaborated based on the Flory model. Finally, a formula is introduced to describe the efficiency of the RAFT-SUMI process, assuming rapid chain transfer equilibrium. Examples of reported RAFT step-growth and SUMI systems are then categorized based on the driving force.
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Affiliation(s)
- Joji Tanaka
- Department of Chemistry, University of North Carolina, Chapel Hill, NC 27599, USA.
| | - Jiajia Li
- Department of Chemistry, University of North Carolina, Chapel Hill, NC 27599, USA.
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, China
| | | | - Wei You
- Department of Chemistry, University of North Carolina, Chapel Hill, NC 27599, USA.
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9
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Paruli EI, Montagna V, García-Soto M, Haupt K, Gonzato C. A general photoiniferter approach to the surface functionalization of acrylic and methacrylic structures written by two-photon stereolithography. NANOSCALE 2023; 15:2860-2870. [PMID: 36688734 DOI: 10.1039/d2nr06627k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Two-photon stereolithography (TPS) is an established additive fabrication technique allowing the voxel-by-voxel direct writing of even intricate 3D nano/microstructures via the polymerization of a photoresin. An obvious way to tune the chemical functionalities of such nano/microstructures is formulating a photoresin with the desired functional monomer(s). Unfortunately, this makes every photoresin "unique" in terms of viscosity and reactivity, thus requiring a tedious and often time-consuming optimization of its printing parameters. In this work, we describe a general approach for the chemical functionalization of TPS-written structures based on two commercial photoresins. Our strategy entailed the grafting of functional polymer layers via an innovative approach based on photoiniferter coupling to unreacted double bonds and photopolymerization. After writing woodpiles as 3D model structures, we demonstrated the viability of this approach by anchoring a photoiniferter via its photoinduced addition to the residual CC on the structure's surface triggered by green light. This in turn allowed for the blue light-mediated, surface-initiated photopolymerization of functional monomers. Molecularly imprinted polymer films were also easily synthesized by using the same approach on model honeycombs. The imprinted layers resulted in only a minimal increase in size with no effect on the geometrical features of the honeycombs. Overall, this strategy offers a general approach for the surface modification of TPS-written (meth)acrylic structures with a wide variety of functional polymers via photoiniferter polymerization.
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Affiliation(s)
- Ernesto Iii Paruli
- Université de Technologie de Compiègne, CNRS Enzyme and Cell Engineering Laboratory, Rue du Docteur Schweitzer, CS 60319, 60203 Compiègne Cedex, France.
| | - Valentina Montagna
- Université de Technologie de Compiègne, CNRS Enzyme and Cell Engineering Laboratory, Rue du Docteur Schweitzer, CS 60319, 60203 Compiègne Cedex, France.
| | - Mariano García-Soto
- Université de Technologie de Compiègne, CNRS Enzyme and Cell Engineering Laboratory, Rue du Docteur Schweitzer, CS 60319, 60203 Compiègne Cedex, France.
| | - Karsten Haupt
- Université de Technologie de Compiègne, CNRS Enzyme and Cell Engineering Laboratory, Rue du Docteur Schweitzer, CS 60319, 60203 Compiègne Cedex, France.
| | - Carlo Gonzato
- Université de Technologie de Compiègne, CNRS Enzyme and Cell Engineering Laboratory, Rue du Docteur Schweitzer, CS 60319, 60203 Compiègne Cedex, France.
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10
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Goldbach E, Allonas X, Croutxé-Barghorn C, Ley C, Halbardier L, L'Hostis G. Influence of thiocarbonylthio- RAFT agents on the homogeneity of polymer network and mechanical properties of 3D printed polymers. Eur Polym J 2023. [DOI: 10.1016/j.eurpolymj.2023.111947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2023]
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11
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Lehnen AC, Gurke J, Bapolisi AM, Reifarth M, Bekir M, Hartlieb M. Xanthate-supported photo-iniferter (XPI)-RAFT polymerization: facile and rapid access to complex macromolecules. Chem Sci 2023; 14:593-603. [PMID: 36741515 PMCID: PMC9847670 DOI: 10.1039/d2sc05197d] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 11/28/2022] [Indexed: 11/30/2022] Open
Abstract
Xanthate-supported photo-iniferter (XPI)-reversible addition-fragmentation chain-transfer (RAFT) polymerization is introduced as a fast and versatile photo-polymerization strategy. Small amounts of xanthate are added to conventional RAFT polymerizations to act as a photo-iniferter under light irradiation. Radical exchange is facilitated by the main CTA ensuring control over the molecular weight distribution, while xanthate enables an efficient photo-(re)activation. The photo-active moiety is thus introduced into the polymer as an end group, which makes chain extension of the produced polymers possible directly by irradiation. This is in sharp contrast to conventional photo-initiators, or photo electron transfer (PET)-RAFT polymerizations, where radical generation depends on the added small molecules. In contrast to regular photo-iniferter-RAFT polymerization, photo-activation is decoupled from polymerization control, rendering XPI-RAFT an elegant tool for the fabrication of defined and complex macromolecules. The method is oxygen tolerant and robust and was used to perform screenings in a well-plate format, and it was even possible to produce multiblock copolymers in a coffee mug under open-to-air conditions. XPI-RAFT does not rely on highly specialized equipment and qualifies as a universal tool for the straightforward synthesis of complex macromolecules. The method is user-friendly and broadens the scope of what can be achieved with photo-polymerization techniques.
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Affiliation(s)
- Anne-Catherine Lehnen
- University of Potsdam, Institute of ChemistryKarl-Liebknecht-Straße 24-25D-14476PotsdamGermany,Fraunhofer Institute for Applied Polymer Research (IAP)Geiselbergstraße 69D-14476PotsdamGermany
| | - Johannes Gurke
- University of Potsdam, Institute of ChemistryKarl-Liebknecht-Straße 24-25D-14476PotsdamGermany,Fraunhofer Institute for Applied Polymer Research (IAP)Geiselbergstraße 69D-14476PotsdamGermany
| | - Alain M. Bapolisi
- University of Potsdam, Institute of ChemistryKarl-Liebknecht-Straße 24-25D-14476PotsdamGermany
| | - Martin Reifarth
- University of Potsdam, Institute of ChemistryKarl-Liebknecht-Straße 24-25D-14476PotsdamGermany,Fraunhofer Institute for Applied Polymer Research (IAP)Geiselbergstraße 69D-14476PotsdamGermany
| | - Marek Bekir
- University of Potsdam, Institute of Physics and AstronomyKarl-Liebknecht-Straße 24-25D-14476PotsdamGermany
| | - Matthias Hartlieb
- University of Potsdam, Institute of ChemistryKarl-Liebknecht-Straße 24-25D-14476PotsdamGermany,Fraunhofer Institute for Applied Polymer Research (IAP)Geiselbergstraße 69D-14476PotsdamGermany
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12
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Hughes RW, Lott ME, Bowman JI, Sumerlin BS. Excitation Dependence in Photoiniferter Polymerization. ACS Macro Lett 2023; 12:14-19. [PMID: 36533885 DOI: 10.1021/acsmacrolett.2c00683] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
We report on a fundamental feature of photoiniferter polymerizations mediated with trithiocarbonates and xanthates. The polymerizations were found to be highly dependent on the activated electronic excitation of the iniferter. Enhanced rates of polymerization and greater control over molecular weights were observed for trithiocarbonate- and xanthate-mediated photoiniferter polymerizations when the n → π* transition of the iniferter was targeted compared to the polymerizations activating the π → π* transition. The disparities in rates of polymerization were attributed to the increased rate of C-S photolysis which was confirmed using model trapping studies. This study provides valuable insight into the role of electronic excitations in photoiniferter polymerization and provides guidance when selecting irradiation conditions for applications where light sensitivity is important.
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Affiliation(s)
- Rhys W Hughes
- George & Josephine Butler Polymer Research Laboratory, Center for Macromolecular Science & Engineering, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Megan E Lott
- George & Josephine Butler Polymer Research Laboratory, Center for Macromolecular Science & Engineering, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Jared I Bowman
- George & Josephine Butler Polymer Research Laboratory, Center for Macromolecular Science & Engineering, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Brent S Sumerlin
- George & Josephine Butler Polymer Research Laboratory, Center for Macromolecular Science & Engineering, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
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13
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Yu C, Song J, Kim TI, Lee Y, Kwon Y, Kim J, Park J, Choi J, Doh J, Min SK, Cho S, Kwon MS. Silver Sulfide Nanocrystals as a Biocompatible and Full-Spectrum Photocatalyst for Efficient Light-Driven Polymerization under Aqueous and Ambient Conditions. ACS Catal 2022. [DOI: 10.1021/acscatal.2c04684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Changhoon Yu
- Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul 08826, Republic of Korea
| | - Jaejung Song
- Department of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Tae In Kim
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Yungyeong Lee
- Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul 08826, Republic of Korea
| | - Yonghwan Kwon
- Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul 08826, Republic of Korea
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Jongkyoung Kim
- Department of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Jeehun Park
- Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul 08826, Republic of Korea
| | - Jinho Choi
- Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul 08826, Republic of Korea
| | - Junsang Doh
- Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul 08826, Republic of Korea
| | - Seung Kyu Min
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Seungho Cho
- Department of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Min Sang Kwon
- Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul 08826, Republic of Korea
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14
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Wanasinghe SV, Sun M, Yehl K, Cuthbert J, Matyjaszewski K, Konkolewicz D. PET-RAFT Increases Uniformity in Polymer Networks. ACS Macro Lett 2022; 11:1156-1161. [PMID: 36069541 DOI: 10.1021/acsmacrolett.2c00448] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Photoinduced electron/energy transfer (PET)-reversible addition-fragmentation chain transfer polymerization (RAFT) and conventional photoinitiated RAFT were used to synthesize polymer networks. In this study, two different metal catalysts, namely, tris[2-phenylpyridinato-C2,N]iridium(III) (Ir(ppy)3) and zinc tetraphenylporphyrin (ZnTPP), were selected to generate two different catalytic pathways, one with Ir(ppy)3 proceeding through an energy-transfer pathway and one with ZnTPP proceeding through an electron-transfer pathway. These PET-RAFT systems were contrasted against a conventional photoinitated RAFT process. Mechanically robust materials were generated. Using bulk swelling ratios and degradable cross-linkers, the homogeneity of the networks was evaluated. Especially at high primary chain length and cross-link density, the PET-RAFT systems generated more uniform networks than those made by conventional RAFT, with the electron transfer-based ZnTPP giving superior results to those of Ir(ppy)3. The ability to deactivate radicals either by RAFT exchange or reversible coupling in PET RAFT was proposed as the mechanism that gave better control in PET-RAFT systems.
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Affiliation(s)
- Shiwanka V Wanasinghe
- Department of Chemistry and Biochemistry, Miami University, 651 E High Street, Oxford, Ohio 45056, United States
| | - Mingkang Sun
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Kevin Yehl
- Department of Chemistry and Biochemistry, Miami University, 651 E High Street, Oxford, Ohio 45056, United States
| | - Julia Cuthbert
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Krzysztof Matyjaszewski
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Dominik Konkolewicz
- Department of Chemistry and Biochemistry, Miami University, 651 E High Street, Oxford, Ohio 45056, United States
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15
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Kim H, Yeow J, Najer A, Kit‐Anan W, Wang R, Rifaie‐Graham O, Thanapongpibul C, Stevens MM. Microliter Scale Synthesis of Luciferase-Encapsulated Polymersomes as Artificial Organelles for Optogenetic Modulation of Cardiomyocyte Beating. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2200239. [PMID: 35901502 PMCID: PMC9507352 DOI: 10.1002/advs.202200239] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 07/07/2022] [Indexed: 06/15/2023]
Abstract
Constructing artificial systems that effectively replace or supplement natural biological machinery within cells is one of the fundamental challenges underpinning bioengineering. At the sub-cellular scale, artificial organelles (AOs) have significant potential as long-acting biomedical implants, mimicking native organelles by conducting intracellularly compartmentalized enzymatic actions. The potency of these AOs can be heightened when judiciously combined with genetic engineering, producing highly tailorable biohybrid cellular systems. Here, the authors present a cost-effective, microliter scale (10 µL) polymersome (PSome) synthesis based on polymerization-induced self-assembly for the in situ encapsulation of Gaussia luciferase (GLuc), as a model luminescent enzyme. These GLuc-loaded PSomes present ideal features of AOs including enhanced enzymatic resistance to thermal, proteolytic, and intracellular stresses. To demonstrate their biomodulation potential, the intracellular luminescence of GLuc-loaded PSomes is coupled to optogenetically engineered cardiomyocytes, allowing modulation of cardiac beating frequency through treatment with coelenterazine (CTZ) as the substrate for GLuc. The long-term intracellular stability of the luminescent AOs allows this cardiostimulatory phenomenon to be reinitiated with fresh CTZ even after 7 days in culture. This synergistic combination of organelle-mimicking synthetic materials with genetic engineering is therefore envisioned as a highly universal strategy for the generation of new biohybrid cellular systems displaying unique triggerable properties.
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Affiliation(s)
- Hyemin Kim
- Department of MaterialsDepartment of Bioengineeringand Institute of Biomedical EngineeringImperial College LondonLondonSW7 2AZUK
| | - Jonathan Yeow
- Department of MaterialsDepartment of Bioengineeringand Institute of Biomedical EngineeringImperial College LondonLondonSW7 2AZUK
| | - Adrian Najer
- Department of MaterialsDepartment of Bioengineeringand Institute of Biomedical EngineeringImperial College LondonLondonSW7 2AZUK
| | - Worrapong Kit‐Anan
- Department of MaterialsDepartment of Bioengineeringand Institute of Biomedical EngineeringImperial College LondonLondonSW7 2AZUK
| | - Richard Wang
- Department of MaterialsDepartment of Bioengineeringand Institute of Biomedical EngineeringImperial College LondonLondonSW7 2AZUK
| | - Omar Rifaie‐Graham
- Department of MaterialsDepartment of Bioengineeringand Institute of Biomedical EngineeringImperial College LondonLondonSW7 2AZUK
| | - Chalaisorn Thanapongpibul
- Department of MaterialsDepartment of Bioengineeringand Institute of Biomedical EngineeringImperial College LondonLondonSW7 2AZUK
| | - Molly M. Stevens
- Department of MaterialsDepartment of Bioengineeringand Institute of Biomedical EngineeringImperial College LondonLondonSW7 2AZUK
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16
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Dau H, Jones GR, Tsogtgerel E, Nguyen D, Keyes A, Liu YS, Rauf H, Ordonez E, Puchelle V, Basbug Alhan H, Zhao C, Harth E. Linear Block Copolymer Synthesis. Chem Rev 2022; 122:14471-14553. [PMID: 35960550 DOI: 10.1021/acs.chemrev.2c00189] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Block copolymers form the basis of the most ubiquitous materials such as thermoplastic elastomers, bridge interphases in polymer blends, and are fundamental for the development of high-performance materials. The driving force to further advance these materials is the accessibility of block copolymers, which have a wide variety in composition, functional group content, and precision of their structure. To advance and broaden the application of block copolymers will depend on the nature of combined segmented blocks, guided through the combination of polymerization techniques to reach a high versatility in block copolymer architecture and function. This review provides the most comprehensive overview of techniques to prepare linear block copolymers and is intended to serve as a guideline on how polymerization techniques can work together to result in desired block combinations. As the review will give an account of the relevant procedures and access areas, the sections will include orthogonal approaches or sequentially combined polymerization techniques, which increases the synthetic options for these materials.
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Affiliation(s)
- Huong Dau
- Department of Chemistry, University of Houston, Center for Excellence in Chemistry, CEPC, Houston, Texas 77004, United States
| | - Glen R Jones
- Department of Chemistry, University of Houston, Center for Excellence in Chemistry, CEPC, Houston, Texas 77004, United States
| | - Enkhjargal Tsogtgerel
- Department of Chemistry, University of Houston, Center for Excellence in Chemistry, CEPC, Houston, Texas 77004, United States
| | - Dung Nguyen
- Department of Chemistry, University of Houston, Center for Excellence in Chemistry, CEPC, Houston, Texas 77004, United States
| | - Anthony Keyes
- Department of Chemistry, University of Houston, Center for Excellence in Chemistry, CEPC, Houston, Texas 77004, United States
| | - Yu-Sheng Liu
- Department of Chemistry, University of Houston, Center for Excellence in Chemistry, CEPC, Houston, Texas 77004, United States
| | - Hasaan Rauf
- Department of Chemistry, University of Houston, Center for Excellence in Chemistry, CEPC, Houston, Texas 77004, United States
| | - Estela Ordonez
- Department of Chemistry, University of Houston, Center for Excellence in Chemistry, CEPC, Houston, Texas 77004, United States
| | - Valentin Puchelle
- Department of Chemistry, University of Houston, Center for Excellence in Chemistry, CEPC, Houston, Texas 77004, United States
| | - Hatice Basbug Alhan
- Department of Chemistry, University of Houston, Center for Excellence in Chemistry, CEPC, Houston, Texas 77004, United States
| | - Chenying Zhao
- Department of Chemistry, University of Houston, Center for Excellence in Chemistry, CEPC, Houston, Texas 77004, United States
| | - Eva Harth
- Department of Chemistry, University of Houston, Center for Excellence in Chemistry, CEPC, Houston, Texas 77004, United States
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17
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Li J, Wu C, Lei Y, Liu W. Tuning Catalyst-Free Photocontrolled Polymerization by Substitution: A Quantitative and Qualitative Interpretation. J Phys Chem Lett 2022; 13:3290-3296. [PMID: 35389216 DOI: 10.1021/acs.jpclett.2c00830] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Catalyst-free photocontrolled reversible addition-fragmentation chain transfer (RAFT) polymerization avoids the side effects of photocatalysts but has the accompanying slow kinetics, thereby warranting more efficient photolysis and faster chain transfer. To understand the underlying mechanisms, both quantitative and qualitative interpretations are needed. Such a goal can be achieved by the iCAS (imposed automatic selection and localization of complete active spaces) approach [J. Chem. Theory Comput. 2021, 17, 4846], which maintains the same CAS and meanwhile provides localized orbitals along the whole reaction. Taking dithiobenzoate as a representative of RAFT agents, it is found here that electron-donating substitution (by methoxy) clearly outperforms both electron-standing (by methyl) and electron-withdrawing (by cyano) substitutions in facilitating photo-RAFT polymerization, by narrowing the gap between the π* and σ* orbitals, so as to facilitate the π* → σ* charge transfer dominating both the photolysis and chain transfer processes. Such findings are of general values.
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Affiliation(s)
- Jun Li
- Qingdao Institute for Theoretical and Computational Sciences, Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao 266237, Shandong, P. R. China
| | - Chenyu Wu
- Qingdao Institute for Theoretical and Computational Sciences, Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao 266237, Shandong, P. R. China
| | - Yibo Lei
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Shaanxi key Laboratory of Physico-Inorganic Chemistry, Northwest University, Xi'an 710127, Shaanxi, P. R. China
| | - Wenjian Liu
- Qingdao Institute for Theoretical and Computational Sciences, Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao 266237, Shandong, P. R. China
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18
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Wan J, Fan B, Thang SH. RAFT-mediated polymerization-induced self-assembly (RAFT-PISA): current status and future directions. Chem Sci 2022; 13:4192-4224. [PMID: 35509470 PMCID: PMC9006902 DOI: 10.1039/d2sc00762b] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 03/17/2022] [Indexed: 12/13/2022] Open
Abstract
Polymerization-induced self-assembly (PISA) combines polymerization and self-assembly in a single step with distinct efficiency that has set it apart from the conventional solution self-assembly processes. PISA holds great promise for large-scale production, not only because of its efficient process for producing nano/micro-particles with high solid content, but also thanks to the facile control over the particle size and morphology. Since its invention, many research groups around the world have developed new and creative approaches to broaden the scope of PISA initiations, morphologies and applications, etc. The growing interest in PISA is certainly reflected in the increasing number of publications over the past few years, and in this review, we aim to summarize these recent advances in the emerging aspects of RAFT-mediated PISA. These include (1) non-thermal initiation processes, such as photo-, enzyme-, redox- and ultrasound-initiation; the achievements of (2) high-order structures, (3) hybrid materials and (4) stimuli-responsive nano-objects by design and adopting new monomers and new processes; (5) the efforts in the realization of upscale production by utilization of high throughput technologies, and finally the (6) applications of current PISA nano-objects in different fields and (7) its future directions.
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Affiliation(s)
- Jing Wan
- School of Chemistry, Monash University Clayton VIC 3800 Australia
| | - Bo Fan
- School of Chemistry, Monash University Clayton VIC 3800 Australia
| | - San H Thang
- School of Chemistry, Monash University Clayton VIC 3800 Australia
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19
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A Photoinduced Dual‐Wavelength Approach for 3D Printing and Self‐Healing of Thermosetting Materials. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202114111] [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]
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20
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Wu Z, Jung K, Wu C, Ng G, Wang L, Liu J, Boyer C. Selective Photoactivation of Trithiocarbonates Mediated by Metal Naphthalocyanines and Overcoming Activation Barriers Using Thermal Energy. J Am Chem Soc 2022; 144:995-1005. [PMID: 35005982 DOI: 10.1021/jacs.1c11700] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Metal naphthalocyanines (MNcs) were demonstrated to be efficient photocatalysts to activate photoinduced electron-transfer reversible addition-fragmentation chain transfer (PET-RAFT) polymerization, enabling well-controlled polymerization of (meth)acrylates under near-infrared (λ = 780 nm) light. Owing to their lower redox potential compared to previously explored photocatalysts, the activation of trithiocarbonate RAFT agents exhibited a unique selectivity that was dependent on the nature of the R group. Specifically, MNcs were capable in activating tertiary R group trithiocarbonates, whereas no activation of the trithiocarbonate possessing a secondary R group was observed. The combination of density functional theory calculations and experimental studies have revealed new mechanistic insights into the factors governing a PET-RAFT mechanism and explained this unique selectivity of MNcs toward tertiary carbon trithiocarbonates. Interestingly, by increasing the reaction temperature moderately (i.e., ∼15 °C), the energy barrier prohibiting the photoactivation of the trithiocarbonate with a secondary R group was overcome, enabling their successful activation.
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Affiliation(s)
- Zilong Wu
- College of Materials Science and Engineering, Institute for Graphene Applied Technology Innovation, Collaborative Innovation Centre for Marine Biomass Fibers, Materials and Textiles of Shandong Province, Qingdao University, Qingdao 266071, China.,Cluster for Advanced Macromolecular Design and Australian Centre for NanoMedicine, School of Chemical Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Kenward Jung
- Cluster for Advanced Macromolecular Design and Australian Centre for NanoMedicine, School of Chemical Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Chenyu Wu
- Qingdao Institute for Theoretical and Computational Sciences, Shandong University, Qingdao 266237, China
| | - Gervase Ng
- Cluster for Advanced Macromolecular Design and Australian Centre for NanoMedicine, School of Chemical Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Lei Wang
- College of Materials Science and Engineering, Institute for Graphene Applied Technology Innovation, Collaborative Innovation Centre for Marine Biomass Fibers, Materials and Textiles of Shandong Province, Qingdao University, Qingdao 266071, China
| | - Jingquan Liu
- College of Materials Science and Engineering, Institute for Graphene Applied Technology Innovation, Collaborative Innovation Centre for Marine Biomass Fibers, Materials and Textiles of Shandong Province, Qingdao University, Qingdao 266071, China
| | - Cyrille Boyer
- Cluster for Advanced Macromolecular Design and Australian Centre for NanoMedicine, School of Chemical Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australia
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21
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Tkachenko V, Kunemann P, Malval JP, Petithory T, Pieuchot L, Vidal L, Chemtob A. Kinetically stable sub-50 nm fluorescent block copolymer nanoparticles via photomediated RAFT dispersion polymerization for cellular imaging. NANOSCALE 2022; 14:534-545. [PMID: 34935832 DOI: 10.1039/d1nr04934h] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Self-assembled block copolymer nanoparticles (NPs) have emerged as major potential nanoscale vehicles for fluorescence bioimaging. The preparation of NPs with high yields possessing high kinetic stability to prevent the leakage of fluorophore molecules is crucial to their practical implementation. Here, we report a photomediated RAFT polymerization-induced self-assembly (PISA) yielding uniform and nanosized poly((oligo(ethylene glycol) acrylate)-block-poly(benzyl acrylate) particles (POEGA-b-PBzA) with a concentration of 22 wt%, over 20 times more than with micellization and nanoprecipitation. The spherical diblock copolymer nanoparticles have an average size of 10-50 nm controllable through the degree of polymerization of the stabilizing POEGA block. Subsequent dialysis against water and swelling with Nile red solution led to highly stable fluorescent NPs able to withstand the changes in concentration, ionic strength, pH or temperature. A PBzA/water interfacial tension of 48.6 mN m-1 hinders the exchange between copolymer chains, resulting in the trapping of NPs in a "kinetically frozen" state responsible for high stability. A spectroscopic study combining fluorescence and UV-vis absorption agrees with a preferential distribution of fluorophores in the outer POEGEA shell despite its hydrophobic nature. Nile red-doped POEGA-b-PBzA micelles without initiator residues and unimers but with high structural stability turn out to be noncytotoxic, and can be used for the optical imaging of cells. Real-time confocal fluorescence microscopy shows a fast cellular uptake using C2C12 cell lines in minutes, and a preferential localization in the perinuclear region, in particular in the vesicles.
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Affiliation(s)
- Vitalii Tkachenko
- Université de Haute-Alsace, CNRS, IS2M UMR7361, F-68100 Mulhouse, France.
- Université de Strasbourg, France
| | - Philippe Kunemann
- Université de Haute-Alsace, CNRS, IS2M UMR7361, F-68100 Mulhouse, France.
- Université de Strasbourg, France
| | - Jean Pierre Malval
- Université de Haute-Alsace, CNRS, IS2M UMR7361, F-68100 Mulhouse, France.
- Université de Strasbourg, France
| | - Tatiana Petithory
- Université de Haute-Alsace, CNRS, IS2M UMR7361, F-68100 Mulhouse, France.
- Université de Strasbourg, France
| | - Laurent Pieuchot
- Université de Haute-Alsace, CNRS, IS2M UMR7361, F-68100 Mulhouse, France.
- Université de Strasbourg, France
| | - Loïc Vidal
- Université de Haute-Alsace, CNRS, IS2M UMR7361, F-68100 Mulhouse, France.
- Université de Strasbourg, France
| | - Abraham Chemtob
- Université de Haute-Alsace, CNRS, IS2M UMR7361, F-68100 Mulhouse, France.
- Université de Strasbourg, France
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22
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Clouthier SM, Tanaka J, You W. Photomediated RAFT step-growth polymerization with maleimide monomers. Polym Chem 2022. [DOI: 10.1039/d2py01166b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Photomediated RAFT step-growth polymerization was performed with and without the presence of a photocatalyst using a trithiocarbonate-based CTA and a maleimide monomer.
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Affiliation(s)
- Samantha Marie Clouthier
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599-3290, USA
| | - Joji Tanaka
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599-3290, USA
| | - Wei You
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599-3290, USA
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23
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Bell K, Freeburne S, Wolford A, Pester CW. Reusable polymer brush-based photocatalysts for PET-RAFT polymerization. Polym Chem 2022. [DOI: 10.1039/d2py00966h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Fluorescein polymer-brush functionalized glass beads synthesize polymers via photoelectron reversible addition fragmentation chain transfer (PET-RAFT) polymerization. These shelf stable heterogeneous catalysts can be recycled after simple filtration.
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Affiliation(s)
- Kirsten Bell
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
| | - Sarah Freeburne
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
| | - Adam Wolford
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
| | - Christian W. Pester
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
- Department of Chemistry, Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA 16802, USA
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24
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Lehnen AC, Kurki J, Hartlieb M. The difference between photo-iniferter and conventional RAFT polymerization: high livingness enables the straightforward synthesis of multiblock copolymers. Polym Chem 2022. [DOI: 10.1039/d1py01530c] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photo-iniferter (PI)-RAFT polymerization, the direct activation of chain transfer agents via light, is a fascinating polymerization technique, as it overcomes some restriction of conventional RAFT polymerization. As such, we elucidated...
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25
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Zhang Z, Corrigan N, Boyer C. A Photoinduced Dual-Wavelength Approach for 3D Printing and Self-Healing of Thermosetting Materials. Angew Chem Int Ed Engl 2021; 61:e202114111. [PMID: 34859952 DOI: 10.1002/anie.202114111] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Indexed: 11/07/2022]
Abstract
Vat photopolymerization-based 3D printing techniques have been widely used to produce high-resolution 3D thermosetting materials. However, the lack of repairability of these thermosets leads to the production of waste. In this study, reversible addition fragmentation chain transfer (RAFT) agents are incorporated into resin formulations to allow visible light (405 nm) mediated 3D printing of materials with self-healing capabilities. The self-healing process is based on the reactivation of RAFT agent embedded in the thermosets under UV light (365 nm), which enables reformation of the polymeric network. The self-healing process can be performed at room temperature without prior deoxygenation. The impact of the type and concentration of RAFT agents in the polymer network on the healing efficiency is explored. Resins containing RAFT agents enable 3D printing of thermosets with self-healing properties, broadening the scope of future applications for polymeric thermosets in various fields.
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Affiliation(s)
- Zhiheng Zhang
- Cluster for Advanced Macromolecular Design (CAMD), School of Chemical Engineering, University of New South Wales, Sydney, NSW 2052, Australia
| | - Nathaniel Corrigan
- Cluster for Advanced Macromolecular Design (CAMD) and Australian Centre for NanoMedicine, School of Chemical Engineering, University of New South Wales, Sydney, NSW 2052, Australia
| | - Cyrille Boyer
- Cluster for Advanced Macromolecular Design (CAMD) and Australian Centre for NanoMedicine, School of Chemical Engineering, University of New South Wales, Sydney, NSW 2052, Australia
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26
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Hartlieb M. Photo-Iniferter RAFT Polymerization. Macromol Rapid Commun 2021; 43:e2100514. [PMID: 34750911 DOI: 10.1002/marc.202100514] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 11/03/2021] [Indexed: 12/27/2022]
Abstract
Light-mediated polymerization techniques offer distinct advantages over polymerization reactions fueled by thermal energy, such as high spatial and temporal control as well as the possibility to work under mild reaction conditions. Reversible addition-fragmentation chain-transfer (RAFT) polymerization is a highly versatile radical polymerization method that can be utilized to control a variety of monomers and produce a vast number of complex macromolecular structures. The use of light to drive a RAFT-polymerization is possible via multiple routes. Besides the use of photo-initiators, or photo-catalysts, the direct activation of the chain transfer agent controlling the RAFT process in a photo-iniferter (PI) process is an elegant way to initiate and control polymerization reactions. Within this review, PI-RAFT polymerization and its advantages over the conventional RAFT process are discussed in detail.
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Affiliation(s)
- Matthias Hartlieb
- Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Straße 24-25, 14476, Potsdam, Germany.,Fraunhofer Institute for Applied Polymer Research (IAP), Geiselbergstraße 69, 14476, Potsdam, Germany
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27
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Allegrezza ML, Konkolewicz D. PET-RAFT Polymerization: Mechanistic Perspectives for Future Materials. ACS Macro Lett 2021; 10:433-446. [PMID: 35549229 DOI: 10.1021/acsmacrolett.1c00046] [Citation(s) in RCA: 56] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
In the past decade, photochemistry has emerged as a growing area in organic and polymer chemistry. Use of light to drive polymerization has advantages by imparting spatial and temporal control over the reaction. Photoinduced electron/energy transfer reversible addition-fragmentation chain transfer polymerization (PET-RAFT) has emerged as an excellent technique for developing well-defined polymers from a variety of functional monomers. However, the mechanism, of electron versus energy transfer is debated in the literature, with conflicting reports on the underlying process. This perspective focuses on the mechanistic aspects of PET-RAFT, in particular, the electron versus energy transfer pathways. The different mechanisms are evaluated, including evidence for one versus the other mechanisms. The current literature has not reached a consensus across all PET-RAFT processes, but rather, each catalytic system has unique characteristics.
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Affiliation(s)
- Michael L. Allegrezza
- Department of Chemistry and Biochemmistry, Miami University, 651 East High Street, Oxford, Ohio 45056, United States
| | - Dominik Konkolewicz
- Department of Chemistry and Biochemmistry, Miami University, 651 East High Street, Oxford, Ohio 45056, United States
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28
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Corrigan N, Trujillo FJ, Xu J, Moad G, Hawker CJ, Boyer C. Divergent Synthesis of Graft and Branched Copolymers through Spatially Controlled Photopolymerization in Flow Reactors. Macromolecules 2021. [DOI: 10.1021/acs.macromol.0c02715] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Nathaniel Corrigan
- Cluster for Advanced Macromolecular Design (CAMD) and Australian Centre for NanoMedicine (ACN), School of Chemical Engineering, UNSW Australia, Sydney, NSW 2052, Australia
| | | | - Jiangtao Xu
- Cluster for Advanced Macromolecular Design (CAMD) and Australian Centre for NanoMedicine (ACN), School of Chemical Engineering, UNSW Australia, Sydney, NSW 2052, Australia
| | - Graeme Moad
- CSIRO Manufacturing, Bag 10, Clayton South, VIC 3169, Australia
| | - Craig J. Hawker
- Materials Research Laboratory and Departments of Materials, Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| | - Cyrille Boyer
- Cluster for Advanced Macromolecular Design (CAMD) and Australian Centre for NanoMedicine (ACN), School of Chemical Engineering, UNSW Australia, Sydney, NSW 2052, Australia
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29
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Lee K, Corrigan N, Boyer C. Rapid High‐Resolution 3D Printing and Surface Functionalization via Type I Photoinitiated RAFT Polymerization. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202016523] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Kenny Lee
- Cluster for Advanced Macromolecular Design School of Chemical Engineering University of New South Wales Sydney NSW 2052 Australia
| | - Nathaniel Corrigan
- Cluster for Advanced Macromolecular Design and Australian Centre for NanoMedicine School of Chemical Engineering University of New South Wales Sydney NSW 2052 Australia
| | - Cyrille Boyer
- Cluster for Advanced Macromolecular Design and Australian Centre for NanoMedicine School of Chemical Engineering University of New South Wales Sydney NSW 2052 Australia
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30
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Lee K, Corrigan N, Boyer C. Rapid High‐Resolution 3D Printing and Surface Functionalization via Type I Photoinitiated RAFT Polymerization. Angew Chem Int Ed Engl 2021; 60:8839-8850. [DOI: 10.1002/anie.202016523] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Revised: 01/15/2021] [Indexed: 12/25/2022]
Affiliation(s)
- Kenny Lee
- Cluster for Advanced Macromolecular Design School of Chemical Engineering University of New South Wales Sydney NSW 2052 Australia
| | - Nathaniel Corrigan
- Cluster for Advanced Macromolecular Design and Australian Centre for NanoMedicine School of Chemical Engineering University of New South Wales Sydney NSW 2052 Australia
| | - Cyrille Boyer
- Cluster for Advanced Macromolecular Design and Australian Centre for NanoMedicine School of Chemical Engineering University of New South Wales Sydney NSW 2052 Australia
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31
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Zhang Z, Corrigan N, Boyer C. Effect of Thiocarbonylthio Compounds on Visible-Light-Mediated 3D Printing. Macromolecules 2021. [DOI: 10.1021/acs.macromol.0c02691] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Zhiheng Zhang
- Centre for Advanced Macromolecular Design and Australian Centre for Nanomedicine, School of Chemical Engineering, University of New South Wales—Sydney, Sydney, NSW 2052, Australia
| | - Nathaniel Corrigan
- Centre for Advanced Macromolecular Design and Australian Centre for Nanomedicine, School of Chemical Engineering, University of New South Wales—Sydney, Sydney, NSW 2052, Australia
| | - Cyrille Boyer
- Centre for Advanced Macromolecular Design and Australian Centre for Nanomedicine, School of Chemical Engineering, University of New South Wales—Sydney, Sydney, NSW 2052, Australia
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32
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Ng G, Jung K, Li J, Wu C, Zhang L, Boyer C. Screening RAFT agents and photocatalysts to mediate PET-RAFT polymerization using a high throughput approach. Polym Chem 2021. [DOI: 10.1039/d1py01258d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
We report a high throughput approach for the screening of RAFT agents and photocatalysts to mediate photoinduced electron/energy transfer-reversible addition–fragmentation chain transfer (PET-RAFT) polymerization.
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Affiliation(s)
- Gervase Ng
- Cluster for Advanced Macromolecular Design and Australian Centre for NanoMedicine, School of Chemical Engineering, University of New South Wales, Sydney, NSW 2052, Australia
| | - Kenward Jung
- Cluster for Advanced Macromolecular Design and Australian Centre for NanoMedicine, School of Chemical Engineering, University of New South Wales, Sydney, NSW 2052, Australia
| | - Jun Li
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, China
| | - Chenyu Wu
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, China
| | - Liwen Zhang
- Cluster for Advanced Macromolecular Design and Australian Centre for NanoMedicine, School of Chemical Engineering, University of New South Wales, Sydney, NSW 2052, Australia
| | - Cyrille Boyer
- Cluster for Advanced Macromolecular Design and Australian Centre for NanoMedicine, School of Chemical Engineering, University of New South Wales, Sydney, NSW 2052, Australia
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33
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Bainbridge CWA, Broderick N, Jin J. RAFT agent symmetry and the effects on photo-growth behavior in living polymer networks. Polym Chem 2021. [DOI: 10.1039/d1py00796c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Here we describe how different symmetries of RAFT agent act after growth. Asymmetric networks showed a pore-filling behaviour, while symmetric networks underwent mesh-expansion.
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Affiliation(s)
- Chris William Anderson Bainbridge
- School of Chemical Sciences, The University of Auckland, Auckland 1010, New Zealand
- Dodd-Walls Centre for Quantum and Photonic Technologies, Auckland 1010, New Zealand
| | - Neil Broderick
- Department of Physics, The University of Auckland, Auckland 1010, New Zealand
- Dodd-Walls Centre for Quantum and Photonic Technologies, Auckland 1010, New Zealand
| | - Jianyong Jin
- School of Chemical Sciences, The University of Auckland, Auckland 1010, New Zealand
- Dodd-Walls Centre for Quantum and Photonic Technologies, Auckland 1010, New Zealand
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34
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Shanmugam S, Ross G, Mbuncha CY, Santra A. Rapid, green synthesis of high performance viscosifiers via a photoiniferter approach for water-based drilling fluids. Polym Chem 2021. [DOI: 10.1039/d1py01083b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The generation of high-performance materials under benign conditions is very much needed in the efforts to reduce the carbon footprint of oil and gas explorations.
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Affiliation(s)
| | - Georgesha Ross
- Aramco Americas, Aramco Research Center – Houston, Texas, 77084, USA
| | | | - Ashok Santra
- Aramco Americas, Aramco Research Center – Houston, Texas, 77084, USA
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35
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Ng G, Li M, Yeow J, Jung K, Pester CW, Boyer C. Benchtop Preparation of Polymer Brushes by SI-PET-RAFT: The Effect of the Polymer Composition and Structure on Inhibition of a Pseudomonas Biofilm. ACS APPLIED MATERIALS & INTERFACES 2020; 12:55243-55254. [PMID: 33233878 DOI: 10.1021/acsami.0c15221] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We report a high-throughput method for producing surface-tethered polymeric brushes on glass substrates via surface-initiated photoinduced electron transfer-reversible addition-fragmentation chain transfer polymerization (SI-PET-RAFT). Due to its excellent oxygen tolerance, SI-PET-RAFT allows brush growth using low reagent volumes (30 μL) without prior degassing. An initial 28 homopolymer brush library was successfully prepared and screened with respect to their antifouling performance. The high-throughput approach was further exploited to expand the library to encompass statistical, gradient, and block architectures to investigate the effect of monomer composition and distribution using two monomers of disparate performance. In this manner, the degree of attachment from Gram-negative Pseudomonas aeruginosa (PA) bacterial biofilms could be tuned between the bounds set by the homopolymer brushes.
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Affiliation(s)
- Gervase Ng
- Centre for Advanced Macromolecular Design and Australian Centre for NanoMedicine, School of Chemical Engineering, The University of New South Wales, Sydney, New South Wales 2052 Australia
| | - Mingxiao Li
- Department of Chemical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Jonathan Yeow
- Centre for Advanced Macromolecular Design and Australian Centre for NanoMedicine, School of Chemical Engineering, The University of New South Wales, Sydney, New South Wales 2052 Australia
| | - Kenward Jung
- Centre for Advanced Macromolecular Design and Australian Centre for NanoMedicine, School of Chemical Engineering, The University of New South Wales, Sydney, New South Wales 2052 Australia
| | - Christian W Pester
- Department of Chemical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
- Department of Materials Science and Engineering, Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Cyrille Boyer
- Centre for Advanced Macromolecular Design and Australian Centre for NanoMedicine, School of Chemical Engineering, The University of New South Wales, Sydney, New South Wales 2052 Australia
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36
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Reversible-deactivation radical polymerization (Controlled/living radical polymerization): From discovery to materials design and applications. Prog Polym Sci 2020. [DOI: 10.1016/j.progpolymsci.2020.101311] [Citation(s) in RCA: 302] [Impact Index Per Article: 75.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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37
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Doerr AM, Burroughs JM, Gitter SR, Yang X, Boydston AJ, Long BK. Advances in Polymerizations Modulated by External Stimuli. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03802] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Alicia M. Doerr
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600, United States
| | - Justin M. Burroughs
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600, United States
| | - Sean R. Gitter
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Xuejin Yang
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Andrew J. Boydston
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
- Department of Chemical and Biological Engineering and Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Brian K. Long
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600, United States
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38
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Nothling MD, Fu Q, Reyhani A, Allison‐Logan S, Jung K, Zhu J, Kamigaito M, Boyer C, Qiao GG. Progress and Perspectives Beyond Traditional RAFT Polymerization. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:2001656. [PMID: 33101866 PMCID: PMC7578854 DOI: 10.1002/advs.202001656] [Citation(s) in RCA: 101] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 06/17/2020] [Indexed: 05/09/2023]
Abstract
The development of advanced materials based on well-defined polymeric architectures is proving to be a highly prosperous research direction across both industry and academia. Controlled radical polymerization techniques are receiving unprecedented attention, with reversible-deactivation chain growth procedures now routinely leveraged to prepare exquisitely precise polymer products. Reversible addition-fragmentation chain transfer (RAFT) polymerization is a powerful protocol within this domain, where the unique chemistry of thiocarbonylthio (TCT) compounds can be harnessed to control radical chain growth of vinyl polymers. With the intense recent focus on RAFT, new strategies for initiation and external control have emerged that are paving the way for preparing well-defined polymers for demanding applications. In this work, the cutting-edge innovations in RAFT that are opening up this technique to a broader suite of materials researchers are explored. Emerging strategies for activating TCTs are surveyed, which are providing access into traditionally challenging environments for reversible-deactivation radical polymerization. The latest advances and future perspectives in applying RAFT-derived polymers are also shared, with the goal to convey the rich potential of RAFT for an ever-expanding range of high-performance applications.
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Affiliation(s)
- Mitchell D. Nothling
- Polymer Science GroupDepartment of Chemical EngineeringThe University of MelbourneParkvilleVIC3010Australia
| | - Qiang Fu
- Centre for Technology in Water and Wastewater Treatment (CTWW)School of Civil and Environmental EngineeringUniversity of Technology SydneyUltimoNSW2007Australia
| | - Amin Reyhani
- Polymer Science GroupDepartment of Chemical EngineeringThe University of MelbourneParkvilleVIC3010Australia
| | - Stephanie Allison‐Logan
- Polymer Science GroupDepartment of Chemical EngineeringThe University of MelbourneParkvilleVIC3010Australia
| | - Kenward Jung
- Centre for Advanced Macromolecular Design (CAMD) and Australian Centre for NanoMedicine (ACN)School of Chemical EngineeringUNWSSydneyNSW2052Australia
| | - Jian Zhu
- College of ChemistryChemical Engineering and Material ScienceDepartment of Polymer Science and EngineeringSoochow UniversitySuzhou215123China
| | - Masami Kamigaito
- Department of Molecular and Macromolecular ChemistryGraduate School of EngineeringNagoya UniversityFuro‐cho, Chikusa‐kuNagoya464‐8603Japan
| | - Cyrille Boyer
- Centre for Advanced Macromolecular Design (CAMD) and Australian Centre for NanoMedicine (ACN)School of Chemical EngineeringUNWSSydneyNSW2052Australia
| | - Greg G. Qiao
- Polymer Science GroupDepartment of Chemical EngineeringThe University of MelbourneParkvilleVIC3010Australia
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39
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Zhang L, Xie L, Xu S, Kuchel RP, Dai Y, Jung K, Boyer C. Dual Role of Doxorubicin for Photopolymerization and Therapy. Biomacromolecules 2020; 21:3887-3897. [PMID: 32786533 DOI: 10.1021/acs.biomac.0c01025] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In this study, we report dual roles for doxorubicin (DOX), which can serve as an antitumor drug as well as a cocatalyst for a photoliving radical polymerization. DOX enhances the polymerization rates of a broad range of monomers, including acrylamide, acrylate, and methacrylates, allowing for high monomer conversion and well-defined molecular weights under irradiation with a blue light-emitting diode light (λmax = 485 nm, 2.2 mW/cm2). Utilizing this property, the photopolymerization of N,N-diethylacrylamide was performed in the presence of a poly(oligo(ethylene glycol) methyl ether acrylate) macroreversible addition-fragmentation chain transfer (macroRAFT) agent to prepare polymeric nanoparticles via aqueous polymerization-induced self-assembly (PISA). By varying the monomer:macroRAFT ratio, spherical polymeric nanoparticles of various diameters could be produced. Most notably, DOX was successfully encapsulated into the hydrophobic core of nanoparticles during the PISA process. The DOX-loaded nanoparticles were effectively uptaken into tumor cells and significantly inhibited the proliferation of tumor cells, demonstrating that the DOX bioactivity was not affected by the polymerization reaction.
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Affiliation(s)
- Liwen Zhang
- Centre for Advanced Macromolecular Design, Australian Centre for NanoMedicine, School of Chemical Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Lisi Xie
- Cancer Centre, Faculty of Health Sciences, University of Macau, Macau, SAR 999078, China.,Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Macau, SAR 999078, China
| | - Sihao Xu
- Centre for Advanced Macromolecular Design, Australian Centre for NanoMedicine, School of Chemical Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Rhiannon P Kuchel
- Electron Microscope Unit, Mark Wainwright Analytical Centre, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Yunlu Dai
- Cancer Centre, Faculty of Health Sciences, University of Macau, Macau, SAR 999078, China.,Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Macau, SAR 999078, China
| | - Kenward Jung
- Centre for Advanced Macromolecular Design, Australian Centre for NanoMedicine, School of Chemical Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Cyrille Boyer
- Centre for Advanced Macromolecular Design, Australian Centre for NanoMedicine, School of Chemical Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australia
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40
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Tanaka J, Häkkinen S, Boeck PT, Cong Y, Perrier S, Sheiko SS, You W. Orthogonal Cationic and Radical RAFT Polymerizations to Prepare Bottlebrush Polymers. Angew Chem Int Ed Engl 2020; 59:7203-7208. [DOI: 10.1002/anie.202000700] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 02/14/2020] [Indexed: 11/06/2022]
Affiliation(s)
- Joji Tanaka
- Department of Chemistry University of North Carolina at Chapel Hill Chapel Hill NC 27599-3290 USA
| | - Satu Häkkinen
- Department of Chemistry University of Warwick Gibbet Hill Road Coventry CV4 7AL UK
| | - Parker T. Boeck
- Department of Chemistry University of North Carolina at Chapel Hill Chapel Hill NC 27599-3290 USA
| | - Yidan Cong
- Department of Chemistry University of North Carolina at Chapel Hill Chapel Hill NC 27599-3290 USA
| | - Sébastien Perrier
- Department of Chemistry University of Warwick Gibbet Hill Road Coventry CV4 7AL UK
- Warwick Medical School University of Warwick Gibbet Hill Road Coventry CV4 7AL UK
- Faculty of Pharmacy and Pharmaceutical Sciences Monash University 381 Royal Parade Parkville VIC 3052 Australia
| | - Sergei S. Sheiko
- Department of Chemistry University of North Carolina at Chapel Hill Chapel Hill NC 27599-3290 USA
| | - Wei You
- Department of Chemistry University of North Carolina at Chapel Hill Chapel Hill NC 27599-3290 USA
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41
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Tanaka J, Häkkinen S, Boeck PT, Cong Y, Perrier S, Sheiko SS, You W. Orthogonal Cationic and Radical RAFT Polymerizations to Prepare Bottlebrush Polymers. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202000700] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Joji Tanaka
- Department of Chemistry University of North Carolina at Chapel Hill Chapel Hill NC 27599-3290 USA
| | - Satu Häkkinen
- Department of Chemistry University of Warwick Gibbet Hill Road Coventry CV4 7AL UK
| | - Parker T. Boeck
- Department of Chemistry University of North Carolina at Chapel Hill Chapel Hill NC 27599-3290 USA
| | - Yidan Cong
- Department of Chemistry University of North Carolina at Chapel Hill Chapel Hill NC 27599-3290 USA
| | - Sébastien Perrier
- Department of Chemistry University of Warwick Gibbet Hill Road Coventry CV4 7AL UK
- Warwick Medical School University of Warwick Gibbet Hill Road Coventry CV4 7AL UK
- Faculty of Pharmacy and Pharmaceutical Sciences Monash University 381 Royal Parade Parkville VIC 3052 Australia
| | - Sergei S. Sheiko
- Department of Chemistry University of North Carolina at Chapel Hill Chapel Hill NC 27599-3290 USA
| | - Wei You
- Department of Chemistry University of North Carolina at Chapel Hill Chapel Hill NC 27599-3290 USA
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42
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Zhou YN, Li JJ, Wu YY, Luo ZH. Role of External Field in Polymerization: Mechanism and Kinetics. Chem Rev 2020; 120:2950-3048. [PMID: 32083844 DOI: 10.1021/acs.chemrev.9b00744] [Citation(s) in RCA: 99] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The past decades have witnessed an increasing interest in developing advanced polymerization techniques subjected to external fields. Various physical modulations, such as temperature, light, electricity, magnetic field, ultrasound, and microwave irradiation, are noninvasive means, having superb but distinct abilities to regulate polymerizations in terms of process intensification and spatial and temporal controls. Gas as an emerging regulator plays a distinctive role in controlling polymerization and resembles a physical regulator in some cases. This review provides a systematic overview of seven types of external-field-regulated polymerizations, ranging from chain-growth to step-growth polymerization. A detailed account of the relevant mechanism and kinetics is provided to better understand the role of each external field in polymerization. In addition, given the crucial role of modeling and simulation in mechanisms and kinetics investigation, an overview of model construction and typical numerical methods used in this field as well as highlights of the interaction between experiment and simulation toward kinetics in the existing systems are given. At the end, limitations and future perspectives for this field are critically discussed. This state-of-the-art research progress not only provides the fundamental principles underlying external-field-regulated polymerizations but also stimulates new development of advanced polymerization methods.
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Affiliation(s)
- Yin-Ning Zhou
- Department of Chemical Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Jin-Jin Li
- Department of Chemical Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Yi-Yang Wu
- Department of Chemical Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Zheng-Hong Luo
- Department of Chemical Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
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43
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Allegrezza ML, De Alwis Watuthanthrige N, Wang Y, Garcia GA, Ren H, Konkolewicz D. Substituent effects in iniferter photopolymerization: can bond homolysis be enhanced by electronics? Polym Chem 2020. [DOI: 10.1039/d0py01086c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Substituent effects on the dithiobenzoate moiety of RAFT iniferters are investigated. Donating groups accelerate the iniferter process, while withdrawing groups slow it. The unique efficiency of the methoxydithiobenzoate iniferter was uncovered.
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Affiliation(s)
| | | | - Yufei Wang
- Department of Chemistry and Biochemistry
- Miami University
- Oxford
- USA
| | | | - Hang Ren
- Department of Chemistry and Biochemistry
- Miami University
- Oxford
- USA
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44
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Li S, Han G, Zhang W. Photoregulated reversible addition–fragmentation chain transfer (RAFT) polymerization. Polym Chem 2020. [DOI: 10.1039/d0py00054j] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Different strategies on photoregulated RAFT polymerization are developed. This minireview summarizes recent advances in photoregulated RAFT polymerization and its applications.
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Affiliation(s)
- Shenzhen Li
- Key Laboratory of Functional Polymer Materials of the Ministry of Education
- Institute of Polymer Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
| | - Guang Han
- State Key Laboratory of Special Functional Waterproof Materials
- Beijing Oriental Yuhong Waterproof Technology Co
- Ltd
- Beijing 100123
- China
| | - Wangqing Zhang
- Key Laboratory of Functional Polymer Materials of the Ministry of Education
- Institute of Polymer Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
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45
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Zhou Y, Zhang Z, Reese CM, Patton DL, Xu J, Boyer C, Postma A, Moad G. Selective and Rapid Light‐Induced RAFT Single Unit Monomer Insertion in Aqueous Solution. Macromol Rapid Commun 2019; 41:e1900478. [DOI: 10.1002/marc.201900478] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 10/06/2019] [Indexed: 12/11/2022]
Affiliation(s)
- Yanyan Zhou
- College of Chemistry, Chemical Engineering and Materials Science Soochow University Suzhou 215123 China
| | - Zhengbiao Zhang
- College of Chemistry, Chemical Engineering and Materials Science Soochow University Suzhou 215123 China
| | - Cassandra M. Reese
- School of Polymer Science and Engineering University of Southern Mississippi Hattiesburg MS 39406 USA
| | - Derek L. Patton
- School of Polymer Science and Engineering University of Southern Mississippi Hattiesburg MS 39406 USA
| | - Jiangtao Xu
- School of Chemical Engineering University of New South Wales Sydney New South Wales 2052 Australia
| | - Cyrille Boyer
- School of Chemical Engineering University of New South Wales Sydney New South Wales 2052 Australia
| | - Almar Postma
- CSIRO Manufacturing Bayview Avenue Clayton Victoria 3168 Australia
| | - Graeme Moad
- CSIRO Manufacturing Bayview Avenue Clayton Victoria 3168 Australia
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46
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Strover LT, Cantalice A, Lam JYL, Postma A, Hutt OE, Horne MD, Moad G. Electrochemical Behavior of Thiocarbonylthio Chain Transfer Agents for RAFT Polymerization. ACS Macro Lett 2019; 8:1316-1322. [PMID: 35651172 DOI: 10.1021/acsmacrolett.9b00598] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Electrochemical activation of thiocarbonylthio reversible addition-fragmentation chain transfer (RAFT) agents (S=C(Z)S-R) is explored as a potential method for initiating RAFT polymerization under mild conditions without producing initiator-derived byproducts. Herein we apply cyclic voltammetry to establish a predominant reduction mechanism, where electrochemical reduction is coupled to an irreversible first-order chemical reaction. Structure-dependent trends in cyclic voltammograms (CVs), and comparison to absorption spectra, clarify the role of R- and Z-groups in determining reduction processes. The major reduction peak moves to more cathodic potentials in the series dithiobenzoates > trithiocarbonates > heteroaromatic dithiocarbamates > xanthates ∼ N-alkyl-N-aryldithiocarbamates, due to the Z-group influence on thiocarbonyl bond reactivity. More active (electron-withdrawing, radical stabilizing) R-groups shift the reduction peak anodically, in part due to their influence on the rate of the coupled chemical reaction. Analysis of CVs across a range of scan rates revealed that kinetic control over the reduction mechanism is influenced by both the charge transfer rate and chemical reaction rate.
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Affiliation(s)
| | - Alexis Cantalice
- CSIRO Manufacturing, Clayton, VIC 3168, Australia
- Chimie ParisTech, Paris 75005, France
| | - Jeff Y. L. Lam
- CSIRO Manufacturing, Clayton, VIC 3168, Australia
- Department of Chemistry, Faculty of Natural Sciences, Imperial College London, London SW7 2AZ, U.K
| | - Almar Postma
- CSIRO Manufacturing, Clayton, VIC 3168, Australia
| | | | | | - Graeme Moad
- CSIRO Manufacturing, Clayton, VIC 3168, Australia
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47
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Lewis RW, Malic N, Saito K, Evans RA, Cameron NR. Ultra-high molecular weight linear coordination polymers with terpyridine ligands. Chem Sci 2019; 10:6174-6183. [PMID: 31360424 PMCID: PMC6585884 DOI: 10.1039/c9sc01115c] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Accepted: 05/14/2019] [Indexed: 11/21/2022] Open
Abstract
This first report of ultra-high molecular weight (>1000 kDa) linear coordination polymers demonstrates their use in agricultural spray drift control.
Ultra-high molecular weight (UHMW, Mn > 1000 kDa) polymeric drift control adjuvants (DCAs) for agricultural spraying are prone to mechanical degradation and rapidly lose performance. To overcome this, we have designed linear coordination polymers (LCPs) composed of 400 kDa telechelic bis-terpyridine end-functionalised polyacrylamide units, which ‘self-heal’ upon shearing through reformation of coordination bonds. After addition of Fe(ii) to dilute aqueous solutions of the terpyridine telechelics, UHMW LCPs were obtained as demonstrated by UV-vis spectroscopy, MALS GPC and intrinsic viscosity measurements. Importantly, these UHMW LCPs were shown to function as effective DCAs, reducing the formation of fine ‘driftable’ droplets during spray testing at concentrations as low as 100 ppm. Following mechanically-induced coordination bond-scission, the UHMW LCPs were found to recover up to 90% of their performance compared to un-sheared samples, at a rate dependent on the transition metal ion used to form the complex.
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Affiliation(s)
- Reece W Lewis
- Department of Materials Science and Engineering , Monash University , 22 Alliance Lane , Clayton , Victoria 3800 , Australia .
| | - Nino Malic
- CSIRO Manufacturing Flagship , Clayton , 3168 , Australia .
| | - Kei Saito
- School of Chemistry , Monash University , Clayton , 3800 , Australia
| | | | - Neil R Cameron
- Department of Materials Science and Engineering , Monash University , 22 Alliance Lane , Clayton , Victoria 3800 , Australia . .,School of Engineering , University of Warwick , Coventry , CV4 7AL , UK
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Corrigan N, Xu J, Boyer C, Allonas X. Exploration of the PET‐RAFT Initiation Mechanism for Two Commonly Used Photocatalysts. CHEMPHOTOCHEM 2019. [DOI: 10.1002/cptc.201800182] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Nathaniel Corrigan
- Centre for Advanced Macromolecular Design (CAMD) School of Chemical Engineering UNSW Australia Sydney NSW 2052 Australia
- Australian Centre for NanoMedicine School of Chemical Engineering UNSW Australia Sydney NSW 2052 Australia
| | - Jiangtao Xu
- Centre for Advanced Macromolecular Design (CAMD) School of Chemical Engineering UNSW Australia Sydney NSW 2052 Australia
- Australian Centre for NanoMedicine School of Chemical Engineering UNSW Australia Sydney NSW 2052 Australia
| | - Cyrille Boyer
- Centre for Advanced Macromolecular Design (CAMD) School of Chemical Engineering UNSW Australia Sydney NSW 2052 Australia
- Australian Centre for NanoMedicine School of Chemical Engineering UNSW Australia Sydney NSW 2052 Australia
| | - Xavier Allonas
- Laboratory of Macromolecular Photochemistry and Engineering University of Haute Alsace 3 bis rue Alfred Werner 68093 Mulhouse France
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Corrigan N, Yeow J, Judzewitsch P, Xu J, Boyer C. Seeing the Light: Advancing Materials Chemistry through Photopolymerization. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201805473] [Citation(s) in RCA: 92] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Nathaniel Corrigan
- Centre for Advanced Macromolecular Design and Australian Centre for Nanomedicine School of Chemical Engineering UNSW Sydney Australia
| | - Jonathan Yeow
- Centre for Advanced Macromolecular Design and Australian Centre for Nanomedicine School of Chemical Engineering UNSW Sydney Australia
| | - Peter Judzewitsch
- Centre for Advanced Macromolecular Design and Australian Centre for Nanomedicine School of Chemical Engineering UNSW Sydney Australia
| | - Jiangtao Xu
- Centre for Advanced Macromolecular Design and Australian Centre for Nanomedicine School of Chemical Engineering UNSW Sydney Australia
| | - Cyrille Boyer
- Centre for Advanced Macromolecular Design and Australian Centre for Nanomedicine School of Chemical Engineering UNSW Sydney Australia
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50
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Corrigan N, Yeow J, Judzewitsch P, Xu J, Boyer C. Seeing the Light: Advancing Materials Chemistry through Photopolymerization. Angew Chem Int Ed Engl 2019; 58:5170-5189. [PMID: 30066456 DOI: 10.1002/anie.201805473] [Citation(s) in RCA: 340] [Impact Index Per Article: 68.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Indexed: 12/20/2022]
Abstract
The application of photochemistry to polymer and material science has led to the development of complex yet efficient systems for polymerization, polymer post-functionalization, and advanced materials production. Using light to activate chemical reaction pathways in these systems not only leads to exquisite control over reaction dynamics, but also allows complex synthetic protocols to be easily achieved. Compared to polymerization systems mediated by thermal, chemical, or electrochemical means, photoinduced polymerization systems can potentially offer more versatile methods for macromolecular synthesis. We highlight the utility of light as an energy source for mediating photopolymerization, and present some promising examples of systems which are advancing materials production through their exploitation of photochemistry.
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Affiliation(s)
- Nathaniel Corrigan
- Centre for Advanced Macromolecular Design and Australian Centre for Nanomedicine, School of Chemical Engineering, UNSW, Sydney, Australia
| | - Jonathan Yeow
- Centre for Advanced Macromolecular Design and Australian Centre for Nanomedicine, School of Chemical Engineering, UNSW, Sydney, Australia
| | - Peter Judzewitsch
- Centre for Advanced Macromolecular Design and Australian Centre for Nanomedicine, School of Chemical Engineering, UNSW, Sydney, Australia
| | - Jiangtao Xu
- Centre for Advanced Macromolecular Design and Australian Centre for Nanomedicine, School of Chemical Engineering, UNSW, Sydney, Australia
| | - Cyrille Boyer
- Centre for Advanced Macromolecular Design and Australian Centre for Nanomedicine, School of Chemical Engineering, UNSW, Sydney, Australia
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