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Kapil K, Jazani AM, Sobieski J, Madureira LP, Szczepaniak G, Martinez MR, Gorczyński A, Murata H, Kowalewski T, Matyjaszewski K. Hydrophilic Poly(meth)acrylates by Controlled Radical Branching Polymerization: Hyperbranching and Fragmentation. Macromolecules 2024; 57:5368-5379. [PMID: 38882197 PMCID: PMC11171460 DOI: 10.1021/acs.macromol.4c00408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 05/08/2024] [Accepted: 05/16/2024] [Indexed: 06/18/2024]
Abstract
Topology significantly impacts polymer properties and applications. Hyperbranched polymers (HBPs) synthesized via atom transfer radical polymerization (ATRP) using inimers typically exhibit broad molecular weight distributions and limited control over branching. Alternatively, copolymerization of inibramers (IB), such as α-chloro/bromo acrylates with vinyl monomers, yields HBPs with precise and uniform branching. Herein, we described the synthesis of hydrophilic HB polyacrylates in water by copolymerizing a water-soluble IB, oligo(ethylene oxide) methyl ether 2-bromoacrylate (OEOBA), with various hydrophilic acrylate comonomers. Visible-light-mediated controlled radical branching polymerization (CRBP) with dual catalysis using eosin Y (EY) and copper complexes resulted in HBPs with various molecular weights (M n = 38 000 to 170 000) and degrees of branching (2%-24%). Furthermore, the optimized conditions enabled the successful application of the OEOBA to synthesize linear-hyperbranched block copolymers and hyperbranched polymer protein hybrids (HB-PPH), demonstrating its potential to advance the synthesis of complex macromolecular architecture under environmentally benign conditions. Copolymerization of hydrophilic methacrylate monomer, oligo(ethylene oxide) methyl ether methacrylate (OEOMA500), and inibramer OEOBA was accompanied by fragmentation via β-carbon C-C bond scission and subsequent growth of polymer chains from the fragments. Furthermore, computational studies investigating the fragmentation depending on the IB and comonomer structure supported the experimental observations. This work expands the toolkit of water-soluble inibramers for CRBP and highlights the critical influence of the inibramer structure on reaction outcomes.
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Affiliation(s)
- Kriti Kapil
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Arman Moini Jazani
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Julian Sobieski
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Leticia P Madureira
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Grzegorz Szczepaniak
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
- Faculty of Chemistry, University of Warsaw, Pasteura 1, Warsaw 02-093, Poland
| | - Michael R Martinez
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
- PPG Industries, Inc., 4325 Rosanna Drive, Allison Park, Pennysylvania 15101, United States
| | - Adam Gorczyński
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
- Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, Poznań, 61-614, Poland
| | - Hironobu Murata
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Tomasz Kowalewski
- 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
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2
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Kröckert KW, Garg F, Heck J, Heinz MV, Lange J, Schmidt R, Hoffmann A, Herres-Pawlis S. ATRP catalysts of tetradentate guanidine ligands - do guanidine donors induce a faster atom transfer? Dalton Trans 2024. [PMID: 38258473 DOI: 10.1039/d3dt03392a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
Tripodal tetradentate N donor ligands stabilise the most active ATRP catalyst systems. Here, we set out to synthesise the new guanidine ligand TMG-4NMe2uns-penp, inspired by p-substituted tris(2-pyridylmethyl)amine (TPMA) ligands. The impact of changing pyridine against guanidine donors was examined through solid state and solution experiments and density functional theory (DFT) calculations. In the solid state, the molecular structures of copper complexes based on the ligands TMG-4NMe2uns-penp, TMG-uns-penp and TMG3tren were discussed concerning the influence of a NMe2 substituent at the pyridines and the guanidine donors. In solution, the TMG-4NMe2uns-penp system was investigated by several methods, including UV/Vis, EPR and NMR spectroscopy indicating similar properties to that of the highly active TPMANMe2 system. The redox potentials were determined and related to the catalytic activity. Besides the expected trends between these and the ligand structures, there is evidence that guanidine donors in tripodal ligand systems lead to a better deactivation and possibly a faster exchange within the ATRP equilibrium than TPMA systems. Supported by DFT calculations, it derives from an easier cleavable Cu-Br bond of the copper(II) deactivator species. The high activity was stated by a controlled initiator for continuous activator regeneration (ICAR) ATRP of styrene.
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Affiliation(s)
- Konstantin W Kröckert
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Felix Garg
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Joshua Heck
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Michel V Heinz
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Justin Lange
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Regina Schmidt
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Alexander Hoffmann
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Sonja Herres-Pawlis
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
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Lorandi F, Fantin M, Jafari H, Gorczynski A, Szczepaniak G, Dadashi-Silab S, Isse AA, Matyjaszewski K. Reactivity Prediction of Cu-Catalyzed Halogen Atom Transfer Reactions Using Data-Driven Techniques. J Am Chem Soc 2023; 145:21587-21599. [PMID: 37733464 DOI: 10.1021/jacs.3c07711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/23/2023]
Abstract
In catalysis, linear free energy relationships (LFERs) are commonly used to identify reaction descriptors that enable the prediction of outcomes and the design of more effective catalysts. Herein, LFERs are established for the reductive cleavage of the C(sp3)-X bond in alkyl halides (RX) by Cu complexes. This reaction represents the activation step in atom transfer radical polymerization and atom transfer radical addition/cyclization. The values of the activation rate constant, kact, for 107 Cu complex/RX couples in 5 different solvents spanning over 13 orders of magnitude were effectively interpolated by the equation: log kact = sC(I + C + S), where I, C, and S are, respectively, the initiator, catalyst, and solvent parameters, and sC is the catalyst-specific sensitivity parameter. Furthermore, each of these parameters was correlated to relevant descriptors, which included the bond dissociation free energy of RX and its Tolman cone angle θ, the electron affinity of X, the radical stabilization energy, the standard reduction potential of the Cu complex, the polarizability parameter π* of the solvent, and the distortion energy of the complex in its transition state. This set of descriptors establishes the fundamental properties of Cu complexes and RX that determine their reactivity and that need to be considered when designing novel systems for atom transfer radical reactions. Finally, a multivariate linear regression (MLR) approach was adopted to develop an objective model that surpassed the predictive capability of the LFER equation. Thus, the MLR model was employed to predict kact values for >2000 Cu complex/RX pairs.
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Affiliation(s)
- Francesca Lorandi
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
- Department of Chemical Sciences, University of Padova, via Marzolo 1, Padova 35131, Italy
| | - Marco Fantin
- Department of Chemical Sciences, University of Padova, via Marzolo 1, Padova 35131, Italy
| | - Hossein Jafari
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Adam Gorczynski
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
- Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland
| | - Grzegorz Szczepaniak
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
| | - Sajjad Dadashi-Silab
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Abdirisak A Isse
- Department of Chemical Sciences, University of Padova, via Marzolo 1, Padova 35131, Italy
| | - Krzysztof Matyjaszewski
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
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4
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Gonzálvez MA, Williams CM, Martínez M, Bernhardt PV. Kinetico-Mechanistic Studies on a Reactive Organocopper(II) Complex: Cu-C Bond Homolysis versus Heterolysis. Inorg Chem 2023; 62:4662-4671. [PMID: 36877141 DOI: 10.1021/acs.inorgchem.3c00127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
Abstract
Organocopper(II) reagents are an unexplored frontier of copper catalysis. Despite being proposed as reactive intermediates, an understanding of the stability and reactivity of the CuII-C bond has remained elusive. Two main pathways can be considered for the cleavage mode of a CuII-C bond: homolysis and heterolysis. We recently showed how organocopper(II) reagents can react with alkenes via radical addition, a homolytic pathway. In this work, the decomposition of the complex [CuIILR]+ [L = tris(2- dimethylaminoethyl)amine, Me6tren, R = NCCH2-] in the absence and presence of an initiator (RX, X = Cl, Br) was evaluated. When no initiator was present, first-order CuII-C bond homolysis occurred producing [CuIL]+ and succinonitrile, via radical termination. When an excess of the initiator was present, a subsequent formation of [CuIILX]+ via a second-order reaction was found, which results from the reaction of [CuIL]+ with RX following homolysis. However, when Brønsted acids (R'-OH: R' = H, Me, Ph, PhCO) were present, heterolytic cleavage of the CuII-C bond produced [CuIIL(OR')]+ and MeCN. Kinetic studies were undertaken to obtain the thermal (ΔH⧧, ΔS⧧) and pressure (ΔV⧧) activation parameters and deuterium kinetic isotopic effects, which provided an understanding of the strength of the CuII-C bond and the nature of the transition state for the reactions involved. These results reveal possible reaction pathways for organocopper(II) complexes relevant to their applications as catalysts in C-C bond forming reactions.
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Affiliation(s)
- Miguel A Gonzálvez
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane 4072, Australia
| | - Craig M Williams
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane 4072, Australia
| | - Manuel Martínez
- Departament de Química Inorgànica i Orgànica, Secció de Química Inorgànica, Universitat de Barcelona, Martí i Franquès 1-11, Barcelona 08028, Spain.,Institute of Nanoscience and Nanotechnology (IN2UB), Universitat de Barcelona, Barcelona 08028, Spain
| | - Paul V Bernhardt
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane 4072, Australia
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Michelas M, Redjel YK, Daran JC, Benslimane M, Poli R, Fliedel C. Cobalt(II) and cobalt(III) complexes of tripodal tetradentate diamino-bis(phenolate) ligands: Synthesis, characterization, crystal structures and evaluation in radical polymerization processes. Inorganica Chim Acta 2023. [DOI: 10.1016/j.ica.2023.121408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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6
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Lorandi F, Fantin M, Matyjaszewski K. Atom Transfer Radical Polymerization: A Mechanistic Perspective. J Am Chem Soc 2022; 144:15413-15430. [PMID: 35882005 DOI: 10.1021/jacs.2c05364] [Citation(s) in RCA: 56] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Since its inception, atom transfer radical polymerization (ATRP) has seen continuous evolution in terms of the design of the catalyst and reaction conditions; today, it is one of the most useful techniques to prepare well-defined polymers as well as one of the most notable examples of catalysis in polymer chemistry. This Perspective highlights fundamental advances in the design of ATRP reactions and catalysts, focusing on the crucial role that mechanistic studies play in understanding, rationalizing, and predicting polymerization outcomes. A critical summary of traditional ATRP systems is provided first; we then focus on the most recent developments to improve catalyst selectivity, control polymerizations via external stimuli, and employ new photochemical or dual catalytic systems with an outlook to future research directions and open challenges.
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Affiliation(s)
- Francesca Lorandi
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States.,Department of Industrial Engineering, University of Padova, Via Marzolo 9, 35131 Padova, Italy
| | - Marco Fantin
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Krzysztof Matyjaszewski
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
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Dworakowska S, Lorandi F, Gorczyński A, Matyjaszewski K. Toward Green Atom Transfer Radical Polymerization: Current Status and Future Challenges. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2106076. [PMID: 35175001 PMCID: PMC9259732 DOI: 10.1002/advs.202106076] [Citation(s) in RCA: 38] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Indexed: 05/13/2023]
Abstract
Reversible-deactivation radical polymerizations (RDRPs) have revolutionized synthetic polymer chemistry. Nowadays, RDRPs facilitate design and preparation of materials with controlled architecture, composition, and functionality. Atom transfer radical polymerization (ATRP) has evolved beyond traditional polymer field, enabling synthesis of organic-inorganic hybrids, bioconjugates, advanced polymers for electronics, energy, and environmentally relevant polymeric materials for broad applications in various fields. This review focuses on the relation between ATRP technology and the 12 principles of green chemistry, which are paramount guidelines in sustainable research and implementation. The green features of ATRP are presented, discussing the environmental and/or health issues and the challenges that remain to be overcome. Key discoveries and recent developments in green ATRP are highlighted, while providing a perspective for future opportunities in this area.
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Affiliation(s)
- Sylwia Dworakowska
- Department of ChemistryCarnegie Mellon University4400 Fifth AvenuePittsburghPA15213USA
- Faculty of Chemical Engineering and TechnologyCracow University of TechnologyWarszawska 24Cracow31‐155Poland
| | - Francesca Lorandi
- Department of ChemistryCarnegie Mellon University4400 Fifth AvenuePittsburghPA15213USA
- Department of Industrial EngineeringUniversity of Padovavia Marzolo 9Padova35131Italy
| | - Adam Gorczyński
- Department of ChemistryCarnegie Mellon University4400 Fifth AvenuePittsburghPA15213USA
- Faculty of ChemistryAdam Mickiewicz UniversityUniwersytetu Poznańskiego 8Poznań61‐614Poland
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8
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Wang FS, Lin SH, Zheng GH, Li MH, Cheng YC, Peng CH. Coordination of Azobisisobutyronitrile with Cobalt Complexes in Cobalt-Mediated Radical Polymerization Disclosed by Linear Correlation between the Equilibrium Constant and Half-Wave Potential. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00663] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Fu-Sheng Wang
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, 101, Sec 2, Kuang-Fu Rd., Hsinchu 30013, Taiwan
| | - Sheng-Hsiang Lin
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, 101, Sec 2, Kuang-Fu Rd., Hsinchu 30013, Taiwan
| | - Guang-Hong Zheng
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, 101, Sec 2, Kuang-Fu Rd., Hsinchu 30013, Taiwan
| | - Ming-Han Li
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, 101, Sec 2, Kuang-Fu Rd., Hsinchu 30013, Taiwan
| | - Yuan-Chung Cheng
- Department of Chemistry and Center for Quantum Science and Engineering, National Taiwan University, Taipei City 10617, Taiwan
| | - Chi-How Peng
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, 101, Sec 2, Kuang-Fu Rd., Hsinchu 30013, Taiwan
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9
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Grekova AV, Ivanchenko PO, Koksharova TV, Burdina YF. Initiation of Polymerization of Vinyl Monomers by Copper(II) Glycylglycinate and Aminoacetate Complexes with 4-Phenylthiosemicarbazide. THEOR EXP CHEM+ 2022. [DOI: 10.1007/s11237-022-09724-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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10
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De Bon F, Lorandi F, Coelho JFJ, Serra AC, Matyjaszewski K, Isse AA. Dual electrochemical and chemical control in atom transfer radical polymerization with copper electrodes. Chem Sci 2022; 13:6008-6018. [PMID: 35685801 PMCID: PMC9132085 DOI: 10.1039/d2sc01982e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Accepted: 04/26/2022] [Indexed: 01/02/2023] Open
Abstract
In Atom Transfer Radical Polymerization (ATRP), Cu0 acts as a supplemental activator and reducing agent (SARA ATRP) by activating alkyl halides and (re)generating the CuI activator through a comproportionation reaction, respectively. Cu0 is also an unexplored, exciting metal that can act as a cathode in electrochemically mediated ATRP (eATRP). Contrary to conventional inert electrodes, a Cu cathode can trigger a dual catalyst regeneration, simultaneously driven by electrochemistry and comproportionation, if a free ligand is present in solution. The dual regeneration explored herein allowed for introducing the concept of pulsed galvanostatic electrolysis (PGE) in eATRP. During a PGE, the process alternates between a period of constant current electrolysis and a period with no applied current in which polymerization continues via SARA ATRP. The introduction of no electrolysis periods without compromising the overall polymerization rate and control is very attractive, if large current densities are needed. Moreover, it permits a drastic charge saving, which is of unique value for a future scale-up, as electrochemistry coupled to SARA ATRP saves energy, and shortens the equipment usage. The use of a Cu cathode in eATRP allows exploiting the synergistic effect between electrochemical and chemical stimuli to halt or accelerate polymerizations, reduce energy consumption and achieve control in challenging systems.![]()
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Affiliation(s)
- Francesco De Bon
- Centre for Mechanical Engineering Materials and Processes (CEMMPRE), Department of Chemical Engineering, University of Coimbra Rua Sílvio Lima, Pólo II 3030-790 Coimbra Portugal
| | - Francesca Lorandi
- Department of Chemical Sciences, University of Padova Via Marzolo 1 I-35131 Padova Italy .,Department of Chemistry, Carnegie Mellon University 4400 Fifth Ave 15213 Pittsburgh PA USA
| | - Jorge F J Coelho
- Centre for Mechanical Engineering Materials and Processes (CEMMPRE), Department of Chemical Engineering, University of Coimbra Rua Sílvio Lima, Pólo II 3030-790 Coimbra Portugal
| | - Armenio C Serra
- Centre for Mechanical Engineering Materials and Processes (CEMMPRE), Department of Chemical Engineering, University of Coimbra Rua Sílvio Lima, Pólo II 3030-790 Coimbra Portugal
| | | | - Abdirisak A Isse
- Department of Chemical Sciences, University of Padova Via Marzolo 1 I-35131 Padova Italy
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11
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Precision Polymer Synthesis by Controlled Radical Polymerization: Fusing the progress from Polymer Chemistry and Reaction Engineering. Prog Polym Sci 2022. [DOI: 10.1016/j.progpolymsci.2022.101555] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Xu X, Peng B, Hong M, Wang T, Fan L, Bao C, Zhang Q. Photo-induced Atom Transfer Radical Polymerization of Styrene using a Highly Active Claw-type Schiff-base Ligand. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111201] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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13
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Expanding the toolbox of controlled/living branching radical polymerization through simulation-informed reaction design. Chem 2022. [DOI: 10.1016/j.chempr.2022.02.022] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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14
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Guerre M, Semsarilar M, Ladmiral V. Grafting from Fluoropolymers Using ATRP: What is Missing? Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100945] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Marc Guerre
- Laboratoire des IMRCP Université de Toulouse CNRS UMR 5623 Université Paul Sabatier 118 route de Narbonne 31062 Toulouse Cedex 9 France
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Abstract
Electrochemically mediated atom transfer radical polymerization (eATRP) of styrene was studied in detail by using CuBr2/TPMA (TPMA = tris(2-pyridylmethyl)amine) as a catalyst. Redox properties of various Cu(II) species were investigated in CH3CN, dimethylformamide (DMF), and dimethyl sulfoxide (DMSO) both in the absence and presence of 50% (v/v) styrene. This investigation together with preliminary eATRP experiments at 80 °C indicated DMF as the best solvent. The effects of catalyst, monomer, and initiator concentrations were also examined. The livingness of the polymerization was studied by chain extension and electrochemical temporal control of polymerization.
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16
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Gonzálvez MA, Harmer JR, Bernhardt PV. Mapping the Pathway to Organocopper(II) Complexes Relevant to Atom Transfer Radical Polymerization. Inorg Chem 2021; 60:10648-10655. [PMID: 34185989 DOI: 10.1021/acs.inorgchem.1c01309] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The rare organocopper(II) complex [Cu(Me6tren)(CH2CN)]+ (Me6tren = tris(2-(dimethylamino)ethyl)amine) has emerged as an important model of potential byproducts in copper-catalyzed atom transfer radical polymerization. This complex has been generated by controlled potential electrolysis of [Cu(Me6tren)(NCMe)]2+ in the presence of BrCH2CN. Time-resolved UV-vis and continuous wave and pulse electron paramagnetic resonance (EPR) spectra identified [Cu(Me6tren)Br]+ as an intermediate. Hyperfine sublevel correlation and electron nuclear double resonance spectroscopy of samples at different timepoints reveal signals that are assigned to a C-bound cyanomethylate ligand, with distinct 14N and 1H hyperfine coupling constants in comparison with the corresponding N-bound acetonitrile and bromido complexes. The experimental EPR data are supported by density functional theory calculations to understand how the geometries of the species involved produce distinct spectroscopic signatures, and a clear picture of how this unusual organocopper(II) complex is formed has emerged.
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Affiliation(s)
- Miguel A Gonzálvez
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane 4072, Australia
| | - Jeffrey R Harmer
- Centre for Advanced Imaging, University of Queensland, Brisbane 4072, Australia
| | - Paul V Bernhardt
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane 4072, Australia
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17
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Melville JN, Bernhardt PV. Electrochemical Exploration of Active Cu-Based Atom Transfer Radical Polymerization Catalysis through Ligand Modification. Inorg Chem 2021; 60:9709-9719. [PMID: 34142823 DOI: 10.1021/acs.inorgchem.1c01001] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The intersection between Cu-catalyzed atom transfer radical polymerization (ATRP) and organometallic mediated radical polymerization (OMRP) has been recently shown to be a result of competition between the CuI and CuII complexes of polyamine ligands for the same organic free radical. The tetradentate ligands N,N'-bis-2'-pyridylmethyl-ethane-1,2-diamine (L1) and N,N'-dimethyl-N,N'-bis-2'-pyridylmethyl-ethane-1,2-diamine (L2) form stable Cu complexes which, depending on their oxidation state, can either liberate or complex organic radicals. Herein, we show that this process may be affected by subtle changes to the ligand system. Switching from a tertiary amine (L2) to a secondary amine (L1) retains ATRP and OMRP activity through a series of cyclic voltammetry measurements in the presence of the initiator bromoacetonitrile.
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Affiliation(s)
- Jamie N Melville
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane 4072, Australia
| | - Paul V Bernhardt
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane 4072, Australia
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18
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Pavan P, Lorandi F, De Bon F, Gennaro A, Isse AA. Enhancement of the Rate of Atom Transfer Radical Polymerization in Organic Solvents by Addition of Water: An Electrochemical Study. ChemElectroChem 2021. [DOI: 10.1002/celc.202100430] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Paola Pavan
- Department of Chemical Sciences University of Padova Via Marzolo 1 35131 Padova Italy
| | - Francesca Lorandi
- Department of Chemistry Carnegie Mellon University 4400 Fifth Avenue Pittsburgh Pennsylvania 15213 USA
| | - Francesco De Bon
- Department of Chemical Sciences University of Padova Via Marzolo 1 35131 Padova Italy
- Present address: Centre for Mechanical Engineering Materials and Processes (CEMMPRE) Department of Chemical Engineering University of Coimbra Rua Silvio Lima, Polo II 3030-790 Coimbra Portugal
| | - Armando Gennaro
- Department of Chemical Sciences University of Padova Via Marzolo 1 35131 Padova Italy
| | - Abdirisak A. Isse
- Department of Chemical Sciences University of Padova Via Marzolo 1 35131 Padova Italy
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20
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Thevenin L, Daran JC, Poli R, Fliedel C. Cobalt complexes of an OSNSO-tetrapodal pentadentate ligand: Synthesis, structures and reactivity. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2020.120215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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21
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Fung AKK, Coote ML. A mechanistic perspective on atom transfer radical polymerization. POLYM INT 2020. [DOI: 10.1002/pi.6130] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Alfred KK Fung
- ARC Centre of Excellence for Electromaterials Science, Research School of Chemistry Australian National University Canberra ACT Australia
| | - Michelle L Coote
- ARC Centre of Excellence for Electromaterials Science, Research School of Chemistry Australian National University Canberra ACT Australia
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22
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Enciso AE, Lorandi F, Mehmood A, Fantin M, Szczepaniak G, Janesko BG, Matyjaszewski K. p
‐Substituted Tris(2‐pyridylmethyl)amines as Ligands for Highly Active ATRP Catalysts: Facile Synthesis and Characterization. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202004724] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Alan E. Enciso
- Department of Chemistry Carnegie Mellon University 4400 Fifth Avenue Pittsburgh PA 15213 USA
| | - Francesca Lorandi
- Department of Chemistry Carnegie Mellon University 4400 Fifth Avenue Pittsburgh PA 15213 USA
| | - Arshad Mehmood
- Department of Chemistry and Biochemistry Texas Christian University 2800 South University Drive Fort Worth TX 76129 USA
| | - Marco Fantin
- 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
| | - Benjamin G. Janesko
- Department of Chemistry and Biochemistry Texas Christian University 2800 South University Drive Fort Worth TX 76129 USA
| | - Krzysztof Matyjaszewski
- Department of Chemistry Carnegie Mellon University 4400 Fifth Avenue Pittsburgh PA 15213 USA
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23
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Enciso AE, Lorandi F, Mehmood A, Fantin M, Szczepaniak G, Janesko BG, Matyjaszewski K. p-Substituted Tris(2-pyridylmethyl)amines as Ligands for Highly Active ATRP Catalysts: Facile Synthesis and Characterization. Angew Chem Int Ed Engl 2020; 59:14910-14920. [PMID: 32416006 DOI: 10.1002/anie.202004724] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 05/10/2020] [Indexed: 12/28/2022]
Abstract
A facile and efficient two-step synthesis of p-substituted tris(2-pyridylmethyl)amine (TPMA) ligands to form Cu complexes with the highest activity to date in atom transfer radical polymerization (ATRP) is presented. In the divergent synthesis, p-Cl substituents in tris(4-chloro-2-pyridylmethyl)amine (TPMA3Cl ) were replaced in one step and high yield by electron-donating cyclic amines (pyrrolidine (TPMAPYR ), piperidine (TPMAPIP ), and morpholine (TPMAMOR )) by nucleophilic aromatic substitution. The [CuII (TPMANR2 )Br]+ complexes exhibited larger energy gaps between frontier molecular orbitals and >0.2 V more negative reduction potentials than [CuII (TPMA)Br]+ , indicating >3 orders of magnitude higher ATRP activity. [CuI (TPMAPYR )]+ exhibited the highest reported activity for Br-capped acrylate chain ends in DMF, and moderate activity toward C-F bonds at room temperature. ATRP of n-butyl acrylate using only 10-25 part per million loadings of [CuII (TPMANR2 )Br]+ exhibited excellent control.
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Affiliation(s)
- Alan E Enciso
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA, 15213, USA
| | - Francesca Lorandi
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA, 15213, USA
| | - Arshad Mehmood
- Department of Chemistry and Biochemistry, Texas Christian University, 2800 South University Drive, Fort Worth, TX, 76129, USA
| | - Marco Fantin
- 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
| | - Benjamin G Janesko
- Department of Chemistry and Biochemistry, Texas Christian University, 2800 South University Drive, Fort Worth, TX, 76129, USA
| | - Krzysztof Matyjaszewski
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA, 15213, USA
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24
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Dadashi-Silab S, Lee IH, Anastasaki A, Lorandi F, Narupai B, Dolinski ND, Allegrezza ML, Fantin M, Konkolewicz D, Hawker CJ, Matyjaszewski K. Investigating Temporal Control in Photoinduced Atom Transfer Radical Polymerization. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00888] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Sajjad Dadashi-Silab
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - In-Hwan Lee
- Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
- Department of Chemistry, Ajou University, Suwon 16499, Korea
| | - Athina Anastasaki
- Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
| | - Francesca Lorandi
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Benjaporn Narupai
- Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
| | - Neil D. Dolinski
- Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
- Materials Department, University of California, Santa Barbara, California 93106, United States
| | - Michael L. Allegrezza
- Department of Chemistry and Biochemistry, Miami University, 651 E High Street, Oxford, Ohio 45056, United States
| | - Marco Fantin
- 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
| | - Craig J. Hawker
- Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
- Materials Department, University of California, Santa Barbara, California 93106, United States
| | - Krzysztof Matyjaszewski
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
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25
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Lorandi F, Fantin M, Wang Y, Isse AA, Gennaro A, Matyjaszewski K. Atom Transfer Radical Polymerization of Acrylic and Methacrylic Acids: Preparation of Acidic Polymers with Various Architectures. ACS Macro Lett 2020; 9:693-699. [PMID: 35648575 DOI: 10.1021/acsmacrolett.0c00246] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The preparation of poly(acrylic acid) (PAA) with tailored architecture and morphology is important for the design of advanced polymer materials. Cu-catalyzed atom transfer radical polymerization (ATRP) of AA is challenging due to the tendency of dormant chains to undergo an intramolecular lactonization reaction with consequent loss of chain-end functionalities, as previously reported for ATRP of methacrylic acid (MAA). In addition, AA can coordinate to the Cu catalyst. Moreover, the lower ATRP reactivity of AA relative to MAA enhances side reactions during polymerizations. These issues were overcome by adjusting the composition of the catalytic system, the polymerization setup, and the initiator nature. AA conversion >70-80% was obtained in 5 h, producing PAA with Đ ≈1.4. Multifunctional water-soluble initiators provided PAA and PMAA with telechelic and star-shaped architectures. Block copolymers of MAA and AA confirmed the retention of chain-end functionalities during ATRPs.
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Affiliation(s)
- Francesca Lorandi
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131, Padova, Italy
| | - Marco Fantin
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Yi Wang
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Abdirisak A. Isse
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131, Padova, Italy
| | - Armando Gennaro
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131, Padova, Italy
| | - Krzysztof Matyjaszewski
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
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26
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Affiliation(s)
- Hyun-Seok Yu
- Institute of Materials Science, Polymer Program and Department of Chemistry University of Connecticut, 97 North Eagleville Road, Storrs, Connecticut 06269-3136, United States
| | - Joon-Sung Kim
- Institute of Materials Science, Polymer Program and Department of Chemistry University of Connecticut, 97 North Eagleville Road, Storrs, Connecticut 06269-3136, United States
| | - Vignesh Vasu
- Institute of Materials Science, Polymer Program and Department of Chemistry University of Connecticut, 97 North Eagleville Road, Storrs, Connecticut 06269-3136, United States
| | - Christopher P. Simpson
- Institute of Materials Science, Polymer Program and Department of Chemistry University of Connecticut, 97 North Eagleville Road, Storrs, Connecticut 06269-3136, United States
| | - Alexandru D. Asandei
- Institute of Materials Science, Polymer Program and Department of Chemistry University of Connecticut, 97 North Eagleville Road, Storrs, Connecticut 06269-3136, United States
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27
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Dadashi-Silab S, Matyjaszewski K. Iron Catalysts in Atom Transfer Radical Polymerization. Molecules 2020; 25:E1648. [PMID: 32260141 PMCID: PMC7180715 DOI: 10.3390/molecules25071648] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 03/31/2020] [Accepted: 04/01/2020] [Indexed: 11/18/2022] Open
Abstract
Catalysts are essential for mediating a controlled polymerization in atom transfer radical polymerization (ATRP). Copper-based catalysts are widely explored in ATRP and are highly efficient, leading to well-controlled polymerization of a variety of functional monomers. In addition to copper, iron-based complexes offer new opportunities in ATRP catalysis to develop environmentally friendly, less toxic, inexpensive, and abundant catalytic systems. Despite the high efficiency of iron catalysts in controlling polymerization of various monomers including methacrylates and styrene, ATRP of acrylate-based monomers by iron catalysts still remains a challenge. In this paper, we review the fundamentals and recent advances of iron-catalyzed ATRP focusing on development of ligands, catalyst design, and techniques used for iron catalysis in ATRP.
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Affiliation(s)
| | - Krzysztof Matyjaszewski
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213, USA;
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28
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De Bon F, Ribeiro DCM, Abreu CMR, Rebelo RAC, Isse AA, Serra AC, Gennaro A, Matyjaszewski K, Coelho JFJ. Under pressure: electrochemically-mediated atom transfer radical polymerization of vinyl chloride. Polym Chem 2020. [DOI: 10.1039/d0py00995d] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Electrochemically mediated ATRP (eATRP) of vinyl chloride (VC), a less activated monomer, was successfully achieved. It is the first report on eATRP of a gaseous monomer under pressure.
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Affiliation(s)
- Francesco De Bon
- University of Coimbra
- Centre for Mechanical Engineering
- Materials and Processes
- Department of Chemical Engineering
- Rua Sílvio Lima-Polo II
| | - Diana C. M. Ribeiro
- University of Coimbra
- Centre for Mechanical Engineering
- Materials and Processes
- Department of Chemical Engineering
- Rua Sílvio Lima-Polo II
| | - Carlos M. R. Abreu
- University of Coimbra
- Centre for Mechanical Engineering
- Materials and Processes
- Department of Chemical Engineering
- Rua Sílvio Lima-Polo II
| | - Rafael A. C. Rebelo
- University of Coimbra
- Centre for Mechanical Engineering
- Materials and Processes
- Department of Chemical Engineering
- Rua Sílvio Lima-Polo II
| | - Abdirisak A. Isse
- Department of Chemical Sciences
- University of Padova
- 35131 Padova
- Italy
| | - Arménio C. Serra
- University of Coimbra
- Centre for Mechanical Engineering
- Materials and Processes
- Department of Chemical Engineering
- Rua Sílvio Lima-Polo II
| | - Armando Gennaro
- Department of Chemical Sciences
- University of Padova
- 35131 Padova
- Italy
| | | | - Jorge F. J. Coelho
- University of Coimbra
- Centre for Mechanical Engineering
- Materials and Processes
- Department of Chemical Engineering
- Rua Sílvio Lima-Polo II
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29
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Martinez MR, Sobieski J, Lorandi F, Fantin M, Dadashi-Silab S, Xie G, Olszewski M, Pan X, Ribelli TG, Matyjaszewski K. Understanding the Relationship between Catalytic Activity and Termination in photoATRP: Synthesis of Linear and Bottlebrush Polyacrylates. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b02397] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Michael R. Martinez
- Department of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Julian Sobieski
- Department of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Francesca Lorandi
- Department of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Marco Fantin
- Department of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Sajjad Dadashi-Silab
- Department of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Guojun Xie
- Department of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Mateusz Olszewski
- Department of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Xiangcheng Pan
- Department of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Thomas G. Ribelli
- Department of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Krzysztof Matyjaszewski
- Department of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
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30
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Affiliation(s)
- Dylan J. Walsh
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Michael G. Hyatt
- Department of Chemistry, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Susannah A. Miller
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Damien Guironnet
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
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31
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Affiliation(s)
- Francesca Lorandi
- 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
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32
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Thevenin L, Fliedel C, Matyjaszewski K, Poli R. Impact of Catalyzed Radical Termination (CRT) and Reductive Radical Termination (RRT) in Metal‐Mediated Radical Polymerization Processes. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900901] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Lucas Thevenin
- CNRS LCC (Laboratoire de Chimie de Coordination) Université de Toulouse UPS, INPT 205 route de Narbonne, BP 44099 31077 Toulouse Cedex 4 France
| | - Christophe Fliedel
- CNRS LCC (Laboratoire de Chimie de Coordination) Université de Toulouse UPS, INPT 205 route de Narbonne, BP 44099 31077 Toulouse Cedex 4 France
| | - Krzysztof Matyjaszewski
- Department of Chemistry Carnegie Mellon University 4400 Fifth Avenue 15213 Pittsburgh PA United States
| | - Rinaldo Poli
- CNRS LCC (Laboratoire de Chimie de Coordination) Université de Toulouse UPS, INPT 205 route de Narbonne, BP 44099 31077 Toulouse Cedex 4 France
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33
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Michieletto A, Lorandi F, De Bon F, Isse AA, Gennaro A. Biocompatible polymers via aqueous electrochemically mediated atom transfer radical polymerization. JOURNAL OF POLYMER SCIENCE 2019. [DOI: 10.1002/pola.29462] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
| | - Francesca Lorandi
- Department of ChemistryCarnegie Mellon University, 4400 Fifth Avenue Pittsburgh Pennsylvania 15213
| | - Francesco De Bon
- Department of Chemical SciencesUniversity of Padova via Marzolo 1, 35131 Padova Italy
| | - Abdirisak Ahmed Isse
- Department of Chemical SciencesUniversity of Padova via Marzolo 1, 35131 Padova Italy
| | - Armando Gennaro
- Department of Chemical SciencesUniversity of Padova via Marzolo 1, 35131 Padova Italy
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34
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Wang Y. ATRP of Methyl Acrylate by Continuous Feeding of Activators Giving Polymers with Predictable End-Group Fidelity. Polymers (Basel) 2019; 11:E1238. [PMID: 31357403 PMCID: PMC6724064 DOI: 10.3390/polym11081238] [Citation(s) in RCA: 5] [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: 06/29/2019] [Revised: 07/21/2019] [Accepted: 07/23/2019] [Indexed: 12/31/2022] Open
Abstract
Atom transfer radical polymerization (ATRP) of methyl acrylate (MA) was carried out by continuous feeding of Cu(I) activators. Typically, the solvent, the monomer, the initiator, and the CuBr2/Me6TREN deactivator are placed in a Schlenk flask (Me6TREN: tris[2-(dimethylamino)ethyl]amine), while the CuBr/Me6TREN activator is placed in a gas-tight syringe and added to the reaction mixture at a constant addition rate by using a syringe pump. As expected, the polymerization started when Cu(I) was added and stopped when the addition was completed, and polymers with a narrow molecular weight distribution were obtained. The polymerization rate could be easily adjusted by changing the activator feeding rate. More importantly, the loss of chain end-groups could be precisely predicted since each loss of Br from the chain end resulted in the irreversible oxidation of one Cu(I) to Cu(II). The Cu(I) added to the reaction system may undergo many oxidation/reduction cycles in ATRP equilibrium, but would finally be oxidized to Cu(II) irreversibly. Thus, the loss of chain end-groups simply equals the total amount of Cu(I) added. This technique provides a neat way to synthesize functional polymers with known end-group fidelity.
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Affiliation(s)
- Yu Wang
- Department of Chemistry, University of Louisiana at Lafayette, Lafayette, LA 70504, USA.
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