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Hakobyan K, Noble B, Xu J. Pyrazole carbodithiolate-driven iterative RAFT single-additions. Chem Commun (Camb) 2024; 60:7443-7446. [PMID: 38946353 DOI: 10.1039/d4cc02219j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/02/2024]
Abstract
In this Communication, we comprehensively investigated substituent effects relevant to iterative reversible activation fragmentation chain transfer (RAFT) single unit monomer insertion (SUMI) reactions. Through the use of the pyrazole carbodithiolate (PCDT) "Z-group" as the chain transfer component in RAFT SUMI, we show the importance of "Z-group" effects and its interplay with "R-group" (the carbon-centred radical precursor) effects. We also expanded the scope of RAFT SUMI to new monomer types and sequences thereof. As such, the C-S bond dissocation/reformation steps were found to be crucial factors in SUMI, and it was found that general substituent effects must be wholistically examined for every step of this reaction. This stands in contrast with conventional knowledge of RAFT polymerisation, where the main consideration is often centred around the propagation stage, i.e., the key C-C bond formation step. Indeed, contrary to SUMI, the latter characteristic was observed in the analogous alternating copolymerisation.
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Affiliation(s)
- Karen Hakobyan
- School of Chemical Engineering, UNSW Sydney, Sydney, NSW 2052, Australia.
| | - Benjamin Noble
- School of Engineering, RMIT University, Melbourne, VIC 3001, Australia
| | - Jiangtao Xu
- School of Chemical Engineering, UNSW Sydney, Sydney, NSW 2052, Australia.
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2
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Boyer C, Kamigaito M, Satoh K, Moad G. Radical-Promoted Single-unit Monomer Insertion (SUMI) [aka. Reversible-Deactivation Radical Addition (RDRA)]. Prog Polym Sci 2023. [DOI: 10.1016/j.progpolymsci.2023.101648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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3
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Zhang L, Lin S, Xu J. Stereochemistry-Induced Discrimination in Reaction Kinetics of Photo-RAFT Initialization. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00119] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Lei Zhang
- Centre for Advanced Macromolecular Design, School of Chemical Engineering, UNSW, Sydney, NSW 2052, Australia
| | - Shiyang Lin
- Centre for Advanced Macromolecular Design, School of Chemical Engineering, UNSW, Sydney, NSW 2052, Australia
| | - Jiangtao Xu
- Centre for Advanced Macromolecular Design, School of Chemical Engineering, UNSW, Sydney, NSW 2052, Australia
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4
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Precise Pentamers with Diverse Monomer Sequences and Their Thermal Properties. CHINESE JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1007/s10118-022-2689-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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5
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Miyajima M, Satoh K, Kamigaito M. Periodically Functionalized Sequence‐Regulated Vinyl Polymers via Iterative Atom Transfer Radical Additions and Acyclic Diene Metathesis Polymerization. MACROMOL CHEM PHYS 2022. [DOI: 10.1002/macp.202100426] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Masato Miyajima
- Department of Molecular and Macromolecular Chemistry Graduate School of Engineering Nagoya University Furo‐cho, Chikusa‐ku Nagoya 464‐8603 Japan
| | - Kotaro Satoh
- Department of Chemical Science and Engineering School of Materials and Chemical Technology Tokyo Institute of Technology 2‐12‐1‐H120 Ookayama, Meguro‐ku Tokyo 152‐8550 Japan
| | - Masami Kamigaito
- Department of Molecular and Macromolecular Chemistry Graduate School of Engineering Nagoya University Furo‐cho, Chikusa‐ku Nagoya 464‐8603 Japan
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6
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Hakobyan K, Xu J, Müllner M. The challenges of controlling polymer synthesis at the molecular and macromolecular level. Polym Chem 2022. [DOI: 10.1039/d1py01581h] [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
In this Perspective, we outline advances and challenges in controlling the structure of polymers at various size regimes in the context of structural features such as molecular weight distribution, end groups, architecture, composition and sequence.
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Affiliation(s)
- Karen Hakobyan
- Key Centre for Polymers and Colloids, School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
- The University of Sydney Nano Institute (Sydney Nano), Sydney, NSW 2006, Australia
- School of Chemical Engineering, UNSW Sydney, NSW 2052, Australia
| | - Jiangtao Xu
- School of Chemical Engineering, UNSW Sydney, NSW 2052, Australia
| | - Markus Müllner
- Key Centre for Polymers and Colloids, School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
- The University of Sydney Nano Institute (Sydney Nano), Sydney, NSW 2006, Australia
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Sivokhin A, Orekhov D, Kazantsev O, Sivokhina O, Orekhov S, Kamorin D, Otopkova K, Smirnov M, Karpov R. Random and Diblock Thermoresponsive Oligo(ethylene glycol)-Based Copolymers Synthesized via Photo-Induced RAFT Polymerization. Polymers (Basel) 2021; 14:137. [PMID: 35012157 PMCID: PMC8747269 DOI: 10.3390/polym14010137] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 12/26/2021] [Accepted: 12/28/2021] [Indexed: 01/11/2023] Open
Abstract
Amphiphilic random and diblock thermoresponsive oligo(ethylene glycol)-based (co)polymers were synthesized via photoiniferter polymerization under visible light using trithiocarbonate as a chain transfer agent. The effect of solvent, light intensity and wavelength on the rate of the process was investigated. It was shown that blue and green LED light could initiate RAFT polymerization of macromonomers without an exogenous initiator at room temperature, giving bottlebrush polymers with low dispersity at sufficiently high conversions achieved in 1-2 h. The pseudo-living mechanism of polymerization and high chain-end fidelity were confirmed by successful chain extension. Thermoresponsive properties of the copolymers in aqueous solutions were studied via turbidimetry and laser light scattering. Random copolymers of methoxy- and alkoxy oligo(ethylene glycol) methacrylates of a specified length formed unimolecular micelles in water with a hydrophobic core consisting of a polymer backbone and alkyl groups and a hydrophilic oligo(ethylene glycol) shell. In contrast, the diblock copolymer formed huge multimolecular micelles.
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Affiliation(s)
- Alexey Sivokhin
- Laboratory of Acrylic Monomers and Polymers, Department of Chemical and Food Technologies, Dzerzhinsk Polytechnic Institute, Nizhny Novgorod State Technical University n.a. R.E. Alekseev, 24 Minin Street, 603950 Nizhny Novgorod, Russia; (D.O.); (O.K.); (S.O.); (D.K.); (K.O.); (M.S.); (R.K.)
| | - Dmitry Orekhov
- Laboratory of Acrylic Monomers and Polymers, Department of Chemical and Food Technologies, Dzerzhinsk Polytechnic Institute, Nizhny Novgorod State Technical University n.a. R.E. Alekseev, 24 Minin Street, 603950 Nizhny Novgorod, Russia; (D.O.); (O.K.); (S.O.); (D.K.); (K.O.); (M.S.); (R.K.)
| | - Oleg Kazantsev
- Laboratory of Acrylic Monomers and Polymers, Department of Chemical and Food Technologies, Dzerzhinsk Polytechnic Institute, Nizhny Novgorod State Technical University n.a. R.E. Alekseev, 24 Minin Street, 603950 Nizhny Novgorod, Russia; (D.O.); (O.K.); (S.O.); (D.K.); (K.O.); (M.S.); (R.K.)
| | - Olga Sivokhina
- V.A. Kargin Research Institute of Chemistry and Technology of Polymers with Pilot Plant, 606000 Dzerzhinsk, Russia;
| | - Sergey Orekhov
- Laboratory of Acrylic Monomers and Polymers, Department of Chemical and Food Technologies, Dzerzhinsk Polytechnic Institute, Nizhny Novgorod State Technical University n.a. R.E. Alekseev, 24 Minin Street, 603950 Nizhny Novgorod, Russia; (D.O.); (O.K.); (S.O.); (D.K.); (K.O.); (M.S.); (R.K.)
| | - Denis Kamorin
- Laboratory of Acrylic Monomers and Polymers, Department of Chemical and Food Technologies, Dzerzhinsk Polytechnic Institute, Nizhny Novgorod State Technical University n.a. R.E. Alekseev, 24 Minin Street, 603950 Nizhny Novgorod, Russia; (D.O.); (O.K.); (S.O.); (D.K.); (K.O.); (M.S.); (R.K.)
- Chromatography Laboratory, Department of Production Control and Chromatography Methods, Lobachevsky State University of Nizhni Novgorod, Dzerzhinsk Branch, 23 Prospekt Gagarina, 603950 Nizhny Novgorod, Russia
| | - Ksenia Otopkova
- Laboratory of Acrylic Monomers and Polymers, Department of Chemical and Food Technologies, Dzerzhinsk Polytechnic Institute, Nizhny Novgorod State Technical University n.a. R.E. Alekseev, 24 Minin Street, 603950 Nizhny Novgorod, Russia; (D.O.); (O.K.); (S.O.); (D.K.); (K.O.); (M.S.); (R.K.)
| | - Michael Smirnov
- Laboratory of Acrylic Monomers and Polymers, Department of Chemical and Food Technologies, Dzerzhinsk Polytechnic Institute, Nizhny Novgorod State Technical University n.a. R.E. Alekseev, 24 Minin Street, 603950 Nizhny Novgorod, Russia; (D.O.); (O.K.); (S.O.); (D.K.); (K.O.); (M.S.); (R.K.)
| | - Rostislav Karpov
- Laboratory of Acrylic Monomers and Polymers, Department of Chemical and Food Technologies, Dzerzhinsk Polytechnic Institute, Nizhny Novgorod State Technical University n.a. R.E. Alekseev, 24 Minin Street, 603950 Nizhny Novgorod, Russia; (D.O.); (O.K.); (S.O.); (D.K.); (K.O.); (M.S.); (R.K.)
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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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9
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Zhang L, Liu R, Lin S, Xu J. PET-RAFT single unit monomer insertion of β-methylstyrene derivatives: RAFT degradation and reaction selectivity. Chem Commun (Camb) 2021; 57:10759-10762. [PMID: 34585689 DOI: 10.1039/d1cc03927j] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reversible addition-fragmentation chain transfer (RAFT) single unit monomer insertion (SUMI) of β-methylstyrene derivatives into diverse RAFT agents presented fast reaction kinetics, but significant degradation of the SUMI products occurred due to a hydrogen abstraction reaction. Fortunately, such degradation can be suppressed through appropriate design of initial RAFT agents attributed to effective chain transfer and selective photoactivation.
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Affiliation(s)
- Lei Zhang
- School of Chemical Engineering, UNSW Sydney, NSW 2052, Australia.
| | - Ruizhe Liu
- School of Chemical Engineering, UNSW Sydney, NSW 2052, Australia.
| | - Shiyang Lin
- School of Chemical Engineering, UNSW Sydney, NSW 2052, Australia.
| | - Jiangtao Xu
- School of Chemical Engineering, UNSW Sydney, NSW 2052, Australia.
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10
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Hakobyan K, McErlean CSP, Müllner M. RAFT without an “R-Group”: From Asymmetric Homo-telechelics to Multiblock Step-Growth and Cyclic Block Copolymers. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01621] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Karen Hakobyan
- Key Centre for Polymers and Colloids, School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
- The University of Sydney Nano Institute (Sydney Nano), Sydney, NSW 2006, Australia
| | | | - Markus Müllner
- Key Centre for Polymers and Colloids, School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
- The University of Sydney Nano Institute (Sydney Nano), Sydney, NSW 2006, Australia
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11
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Kerr A, Moriceau G, Przybyla MA, Smith T, Perrier S. Bis(trithiocarbonate) Disulfides: From Chain Transfer Agent Precursors to Iniferter Control Agents in RAFT Polymerization. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00565] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Andrew Kerr
- Department of Chemistry, The University of Warwick, Coventry CV4 7AL, U.K
| | - Guillaume Moriceau
- Department of Chemistry, The University of Warwick, Coventry CV4 7AL, U.K
| | | | - Timothy Smith
- Lubrizol Limited, The Knowle, Nether Lane, Hazelwood, Derbyshire DE56 4AN, U.K
| | - Sébastien Perrier
- Department of Chemistry, The University of Warwick, Coventry CV4 7AL, U.K
- Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia
- Warwick Medical School, The University of Warwick, Coventry CV4 7AL, U.K
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