101
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Souri Z, Adeli M, Mehdipour E. Two-dimensional MoS2: a platform for constructing three-dimensional structures using RAFT polymerization. NEW J CHEM 2020. [DOI: 10.1039/d0nj03285a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Controlled and straightforward functionalization are relevant strategies to obtain MoS2 platforms with defined functionality and improved processability.
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Affiliation(s)
- Zeinab Souri
- Faculty of Science
- Department of Chemistry
- Lorestan University
- Khorramabad
- Iran
| | - Mohsen Adeli
- Faculty of Science
- Department of Chemistry
- Lorestan University
- Khorramabad
- Iran
| | - Ebrahim Mehdipour
- Faculty of Science
- Department of Chemistry
- Lorestan University
- Khorramabad
- Iran
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102
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Gibson RR, Cornel EJ, Musa OM, Fernyhough A, Armes SP. RAFT dispersion polymerisation of lauryl methacrylate in ethanol–water binary mixtures: synthesis of diblock copolymer vesicles with deformable membranes. Polym Chem 2020. [DOI: 10.1039/c9py01768b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Diblock copolymer vesicles with deformable membranes are prepared via RAFT dispersion polymerisation of lauryl methacrylate in an 80 : 20 w/w ethanol–water mixture; visible light irradiation allows facile RAFT chain-end removal from these nano-objects.
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Affiliation(s)
- R. R. Gibson
- Dainton Building
- Department of Chemistry
- University of Sheffield
- Sheffield
- UK
| | - E. J. Cornel
- Dainton Building
- Department of Chemistry
- University of Sheffield
- Sheffield
- UK
| | | | | | - S. P. Armes
- Dainton Building
- Department of Chemistry
- University of Sheffield
- Sheffield
- UK
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103
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Fultz BA, Beery D, Coia BM, Hanson K, Kennemur JG. Catalyst free removal of trithiocarbonate RAFT CTAs from poly(vinylpyridine)s using tris(trimethylsilyl)silane and light. Polym Chem 2020. [DOI: 10.1039/d0py01104e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Trithiocarbonate end groups on various polymers, including polyvinylpyridines, are reduced rapily and quantitatively using only tris(trimethylsilyl)silane and light.
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Affiliation(s)
- Brandon A. Fultz
- Department of Chemistry and Biochemistry
- Florida State University
- Tallahassee
- USA
| | - Drake Beery
- Department of Chemistry and Biochemistry
- Florida State University
- Tallahassee
- USA
| | - Brianna M. Coia
- Department of Chemistry and Biochemistry
- Florida State University
- Tallahassee
- USA
| | - Kenneth Hanson
- Department of Chemistry and Biochemistry
- Florida State University
- Tallahassee
- USA
| | - Justin G. Kennemur
- Department of Chemistry and Biochemistry
- Florida State University
- Tallahassee
- USA
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104
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Zhang WJ, Kadirkhanov J, Wang CH, Ding SG, Hong CY, Wang F, You YZ. Polymerization-induced self-assembly for the fabrication of polymeric nano-objects with enhanced structural stability by cross-linking. Polym Chem 2020. [DOI: 10.1039/d0py00368a] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review discusses the strategies of core-cross-linking in most of the PISA literatures (including post-polymerization cross-linking, photo-cross-linking and in situ cross-linking) and the applications of the cross-linked nano-objects.
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Affiliation(s)
- Wen-Jian Zhang
- CAS Key Laboratory of Soft Matter Chemistry
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei
- China
| | - Jamshid Kadirkhanov
- CAS Key Laboratory of Soft Matter Chemistry
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei
- China
| | - Chang-Hui Wang
- Department of Cardiology
- First Affiliated Hospital of Anhui Medical University
- Hefei 230026
- China
| | - Sheng-Gang Ding
- Department of Pediatrics
- First Affiliated Hospital of Anhui Medical University
- Hefei 230026
- China
| | - Chun-Yan Hong
- CAS Key Laboratory of Soft Matter Chemistry
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei
- China
| | - Fei Wang
- Neurosurgical Department
- The First Affiliated Hospital of USTC
- Division of Life Sciences and Medicine
- University of Science and Technology of China
- Hefei
| | - Ye-Zi You
- CAS Key Laboratory of Soft Matter Chemistry
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei
- China
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105
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Solimando X, Catel Y, Moszner N, Robin JJ, Monge S. Smart functionalized phosphonic acid based copolymers: new structures for old purposes. Polym Chem 2020. [DOI: 10.1039/d0py00337a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Innovative well-defined acidic photopolymerizable phosphorus-based copolymers were prepared and tested in well-known dental applications to improve the adhesion of dental self-etch adhesives (SEAs).
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106
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Hess A, Schmidt BVKJ, Schlaad H. Aminolysis induced functionalization of (RAFT) polymer-dithioester with thiols and disulfides. Polym Chem 2020. [DOI: 10.1039/d0py01365j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Efficient exchange of the polymer-dithioester end group by aminolysis/functionalization with thiol or disulfide under ambient atmospheric conditions.
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Affiliation(s)
- Andreas Hess
- University of Potsdam
- Institute of Chemistry
- 14476 Potsdam
- Germany
| | | | - Helmut Schlaad
- University of Potsdam
- Institute of Chemistry
- 14476 Potsdam
- Germany
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107
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Simonova YA, Topchiy MA, Filatova MP, Yevlampieva NP, Slyusarenko MA, Bondarenko GN, Asachenko AF, Nechaev MS, Timofeeva LM. Impact of the RAFT/MADIX agent on protonated diallylammonium monomer cyclopolymerization with efficient chain transfer to monomer. Eur Polym J 2020. [DOI: 10.1016/j.eurpolymj.2019.109363] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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108
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Parkes GE, Hutchins-Crawford HJ, Bourdin C, Reynolds S, Leslie LJ, Derry MJ, Harries JL, Topham PD. Thermally triggerable, anchoring block copolymers for use in aqueous inkjet printing. Polym Chem 2020. [DOI: 10.1039/d0py00244e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Towards the goal of shifting from toxic organic solvents to aqueous-based formulations in commercial inkjet printing, a series of well-defined amphiphilic block copolymers have been synthesized via RAFT polymerization.
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Affiliation(s)
- George E. Parkes
- Aston Institute of Materials Research
- Aston University
- Birmingham
- UK
| | | | | | | | - Laura J. Leslie
- Aston Institute of Materials Research
- Aston University
- Birmingham
- UK
| | - Matthew J. Derry
- Aston Institute of Materials Research
- Aston University
- Birmingham
- UK
| | | | - Paul D. Topham
- Aston Institute of Materials Research
- Aston University
- Birmingham
- UK
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109
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110
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Sponchioni M, O'Brien CT, Borchers C, Wang E, Rivolta MN, Penfold NJW, Canton I, Armes SP. Probing the mechanism for hydrogel-based stasis induction in human pluripotent stem cells: is the chemical functionality of the hydrogel important? Chem Sci 2019; 11:232-240. [PMID: 34040716 PMCID: PMC8133024 DOI: 10.1039/c9sc04734d] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Accepted: 11/11/2019] [Indexed: 11/23/2022] Open
Abstract
It is well-known that pluripotent human embryonic stem cells (hPSC) can differentiate into any cell type. Recently, we reported that hPSC colonies enter stasis when immersed in an extremely soft hydrogel comprising hydroxyl-functional block copolymer worms (I. Canton, N. J. Warren, A. Chahal, K. Amps, A. Wood, R. Weightman, E. Wang, H. Moore and S. P. Armes, ACS Centr. Sci., 2016, 2, 65-74). The gel modulus and chemical structure of this synthetic hydrogel are similar to that of natural mucins, which are implicated in the mechanism of diapause for mammalian embryos. Does stasis induction occur merely because of the very soft nature of such hydrogels or does chemical functionality also play a role? Herein, we address this key question by designing a new hydrogel of comparable softness in which the PGMA stabilizer chains are replaced with non-hydroxylated poly(ethylene glycol) [PEG]. Immunolabeling studies confirm that hPSC colonies immersed in such PEG-based hydrogels do not enter stasis but instead proliferate (and differentiate if no adhesion substrate is present). However, pluripotency is retained if an appropriate adhesion substrate is provided. Thus, the chemical functionality of the hydrogel clearly plays a decisive role in the stasis induction mechanism.
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Affiliation(s)
- M Sponchioni
- Department of Chemistry, University of Sheffield Dainton Building Sheffield S3 7HF UK
| | - C T O'Brien
- Department of Chemistry, University of Sheffield Dainton Building Sheffield S3 7HF UK
| | - C Borchers
- Department of Chemistry, University of Sheffield Dainton Building Sheffield S3 7HF UK
| | - E Wang
- Department of Biochemistry and Molecular Genetics, University of Louisville Louisville Kentucky 40202 USA
| | - M N Rivolta
- Department of Biomedical Science, University of Sheffield Western Bank Sheffield S10 2TN UK
| | - N J W Penfold
- Department of Chemistry, University of Sheffield Dainton Building Sheffield S3 7HF UK
| | - I Canton
- Department of Chemistry, University of Sheffield Dainton Building Sheffield S3 7HF UK
| | - S P Armes
- Department of Chemistry, University of Sheffield Dainton Building Sheffield S3 7HF UK
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111
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Bekanova MZ, Neumolotov NK, Jablanovic AD, Plutalova AV, Chernikova EV. Radical Substitution of the Dithiocarbonyl Group of Poly(methyl methacrylate) Obtained by Reversible Addition–Fragmentation Chain Transfer Polymerization. POLYMER SCIENCE SERIES C 2019. [DOI: 10.1134/s1811238219010028] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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112
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Dao VH, Cameron NR, Saito K. Synthesis of UHMW Star-Shaped AB Block Copolymers and Their Flocculation Efficiency in High-Ionic-Strength Environments. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01290] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
| | - Neil R. Cameron
- School of Engineering, University of Warwick, Coventry CV4 7AL, United Kingdom
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113
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Kim K, Ahn J, Park M, Lee H, Kim YJ, Chang T, Jeon HB, Paik HJ. Molecular-Weight Distribution of Living Chains in Polystyrene Prepared by Reversible Addition–Fragmentation Chain-Transfer Polymerization. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01331] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Kyoungho Kim
- Department of Polymer Science and Engineering, Pusan National University, Busan 46241, Korea
| | - Junyoung Ahn
- Department of Chemistry and Division of Advanced Materials, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
| | - Mirim Park
- Department of Polymer Science and Engineering, Pusan National University, Busan 46241, Korea
| | - Hana Lee
- Department of Chemistry, Kwangwoon University, Seoul 01897, Korea
| | - Yeon Ji Kim
- Department of Chemistry, Kwangwoon University, Seoul 01897, Korea
| | - Taihyun Chang
- Department of Chemistry and Division of Advanced Materials, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
| | - Heung Bae Jeon
- Department of Chemistry, Kwangwoon University, Seoul 01897, Korea
| | - Hyun-jong Paik
- Department of Polymer Science and Engineering, Pusan National University, Busan 46241, Korea
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114
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De Vrieze J, Louage B, Deswarte K, Zhong Z, De Coen R, Van Herck S, Nuhn L, Kaas Frich C, Zelikin AN, Lienenklaus S, Sanders NN, Lambrecht BN, David SA, De Geest BG. Potent Lymphatic Translocation and Spatial Control Over Innate Immune Activation by Polymer-Lipid Amphiphile Conjugates of Small-Molecule TLR7/8 Agonists. Angew Chem Int Ed Engl 2019; 58:15390-15395. [PMID: 31397948 DOI: 10.1002/anie.201905687] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 06/25/2019] [Indexed: 12/16/2022]
Abstract
Uncontrolled systemic inflammatory immune triggering has hampered the clinical translation of several classes of small-molecule immunomodulators, such as imidazoquinoline TLR7/8 agonists for vaccine design and cancer immunotherapy. By taking advantage of the inherent serum-protein-binding property of lipid motifs and their tendency to accumulate in lymphoid tissue, we designed amphiphilic lipid-polymer conjugates that suppress systemic inflammation but provoke potent lymph-node immune activation. This work provides a rational basis for the design of lipid-polymer amphiphiles for optimized lymphoid targeting.
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Affiliation(s)
- Jana De Vrieze
- Department of Pharmaceutics, Ghent University, Ghent, Belgium
| | - Benoit Louage
- Department of Pharmaceutics, Ghent University, Ghent, Belgium
| | - Kim Deswarte
- Department of Internal Medicine and Pediatrics, Ghent University, VIB Center for Inflammation Research, Ghent, Belgium
| | - Zifu Zhong
- Department of Nutrition, Genetics and Ethology, Ghent University, Merelbeke, Belgium
| | - Ruben De Coen
- Department of Pharmaceutics, Ghent University, Ghent, Belgium
| | - Simon Van Herck
- Department of Pharmaceutics, Ghent University, Ghent, Belgium
| | - Lutz Nuhn
- Max Planck Institute for Polymer Research, Mainz, Germany
| | | | | | - Stefan Lienenklaus
- Institute for Laboratory Animal Science and Institute of Immunology, Hanover Medical School, Hannover, Germany
| | - Niek N Sanders
- Department of Nutrition, Genetics and Ethology, Ghent University, Merelbeke, Belgium
| | - Bart N Lambrecht
- Department of Internal Medicine and Pediatrics, Ghent University, VIB Center for Inflammation Research, Ghent, Belgium.,Department of Pulmonary Medicine, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Sunil A David
- Department of Medicinal Chemistry, University of Minnesota, Minneapolis, MN, USA
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115
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De Vrieze J, Louage B, Deswarte K, Zhong Z, De Coen R, Van Herck S, Nuhn L, Kaas Frich C, Zelikin AN, Lienenklaus S, Sanders NN, Lambrecht BN, David SA, De Geest BG. Amphiphile Polymer‐Lipidkonjugate zur potenten lymphatischen Anreicherung von TLR7/8‐Agonisten ermöglichen eine örtlich begrenzte Aktivierung des angeborenen Immunsystems. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201905687] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Jana De Vrieze
- Faculteit Farmaceutische Wetenschappen Universiteit Gent Ottergemsesteenweg 460 9000 Gent Belgien
| | - Benoit Louage
- Faculteit Farmaceutische Wetenschappen Universiteit Gent Ottergemsesteenweg 460 9000 Gent Belgien
| | - Kim Deswarte
- Department of Internal Medicine and Pediatrics, Ghent University VIB Center for Inflammation Research Technologiepark 71 9052 Gent Belgien
| | - Zifu Zhong
- Vakgroep Voeding, Genetica en Ethologie, Faculteit Diergeneeskunde Universiteit Gent Heidestraat 19 9820 Merelbeke Belgien
| | - Ruben De Coen
- Faculteit Farmaceutische Wetenschappen Universiteit Gent Ottergemsesteenweg 460 9000 Gent Belgien
| | - Simon Van Herck
- Faculteit Farmaceutische Wetenschappen Universiteit Gent Ottergemsesteenweg 460 9000 Gent Belgien
| | - Lutz Nuhn
- Max-Planck-Institut für Polymerforschung Ackermannweg 10 55128 Mainz Deutschland
| | - Camilla Kaas Frich
- Institut for Kemi Aarhus Universitet Langelandsgade 140 8000 Aarhus C Dänemark
| | | | - Stefan Lienenklaus
- Institut für Versuchstierkunde und Zentrales Tierlaboratorium Medizinische Hochschule Hannover Carl-Neuberg-Str.1 30625 Hannover Deutschland
| | - Niek N. Sanders
- Vakgroep Voeding, Genetica en Ethologie, Faculteit Diergeneeskunde Universiteit Gent Heidestraat 19 9820 Merelbeke Belgien
| | - Bart N. Lambrecht
- Department of Internal Medicine and Pediatrics, Ghent University VIB Center for Inflammation Research Technologiepark 71 9052 Gent Belgien
- Department of Pulmonary Medicine Erasmus University Medical Center Rotterdam Netherlands
| | - Sunil A. David
- Department of Medicinal Chemistry University of Minnesota 2231 Sixth Street SE Minneapolis MN 55455 USA
| | - Bruno G. De Geest
- Faculteit Farmaceutische Wetenschappen Universiteit Gent Ottergemsesteenweg 460 9000 Gent Belgien
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116
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Derry MJ, Smith T, O’Hora PS, Armes SP. Block Copolymer Nanoparticles Prepared via Polymerization-Induced Self-Assembly Provide Excellent Boundary Lubrication Performance for Next-Generation Ultralow-Viscosity Automotive Engine Oils. ACS APPLIED MATERIALS & INTERFACES 2019; 11:33364-33369. [PMID: 31430432 PMCID: PMC7007003 DOI: 10.1021/acsami.9b12472] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Core cross-linked poly(stearyl methacrylate)-poly(benzyl methacrylate)-poly(ethylene glycol dimethacrylate) [S31-B200-E20] triblock copolymer nanoparticles were synthesized directly in an industrial mineral oil via polymerization-induced self-assembly (PISA). Gel permeation chromatography analysis of the S31-B200 diblock copolymer precursor chains indicated a well-controlled reversible addition-fragmentation chain transfer dispersion polymerization, while transmission electron microscopy, dynamic light-scattering (DLS), and small-angle X-ray scattering studies indicated the formation of well-defined spheres. Moreover, DLS studies performed in THF, which is a common solvent for the S and B blocks, confirmed successful covalent stabilization because well-defined solvent-swollen spheres were obtained under such conditions. Tribology experiments using a mini-traction machine (MTM) indicated that 0.50% w/w dispersions of S31-B200-E20 spheres dramatically reduce the friction coefficient of base oil within the boundary lubrication regime. Given their efficient and straightforward PISA synthesis at high solids, such nanoparticles offer new opportunities for the formulation of next-generation ultralow-viscosity automotive engine oils.
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Affiliation(s)
- Matthew J. Derry
- Dainton
Building, Department of Chemistry, University
of Sheffield, Brook Hill, Sheffield, S3 7HF South Yorkshire, United Kingdom
- E-mail: . Phone: +44(0)114-222-9503
| | - Timothy Smith
- Lubrizol
Ltd., The Knowle, Nether
Lane, Hazelwood, Derbyshire DE56 4AN, United Kingdom
| | - Paul S. O’Hora
- Lubrizol
Ltd., The Knowle, Nether
Lane, Hazelwood, Derbyshire DE56 4AN, United Kingdom
| | - Steven P. Armes
- Dainton
Building, Department of Chemistry, University
of Sheffield, Brook Hill, Sheffield, S3 7HF South Yorkshire, United Kingdom
- E-mail: . Phone: +44(0)114-222-9342
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117
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Arisaka Y, Yui N. Suspending Polyrotaxane Dissociation via Photo-Reversible Capping of Terminals. Macromol Rapid Commun 2019; 40:e1900323. [PMID: 31429992 DOI: 10.1002/marc.201900323] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Revised: 08/07/2019] [Indexed: 12/23/2022]
Abstract
Reversible covalent bonds yield polymeric materials with functional characteristics such as self-healing, shape memory, stress relaxation, and stimuli-responsiveness. Here, photo-reversibly cappable polyrotaxanes are designed and the on-off controlled dissociation of their supramolecular architectures is demonstrated. The polyrotaxanes are synthesized by capping dithiobenzoates at both terminals of polyethylene glycol threaded through multiple α-cyclodextrins. Since dethreading of the α-cyclodextrins is prevented by the dithiobenzoate stoppers, the supramolecular dissociation is induced by their photo-cleavage. Subsequently, the cleaved dithiobenzoates spontaneously re-cap the polyrotaxane terminals in darkness. Thus, the supramolecular dissociation can be modulated by photo-reversible capping of the dithiobenzoate stoppers. These polyrotaxanes with dithiobenzoate stoppers are promising functional materials for photo-controlling physical properties and structures.
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Affiliation(s)
- Yoshinori Arisaka
- Department of Organic Biomaterials, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 12-3-10 Kanda-Surugadai, Chiyoda, Tokyo, 101-0062, Japan
| | - Nobuhiko Yui
- Department of Organic Biomaterials, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 12-3-10 Kanda-Surugadai, Chiyoda, Tokyo, 101-0062, Japan
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118
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Hannewald N, Enke M, Nischang I, Zechel S, Hager MD, Schubert US. Mechanical Activation of Terpyridine Metal Complexes in Polymers. J Inorg Organomet Polym Mater 2019. [DOI: 10.1007/s10904-019-01274-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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119
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Huang J, Morin FJ, Laaser JE. Charge-Density-Dominated Phase Behavior and Viscoelasticity of Polyelectrolyte Complex Coacervates. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00036] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Jun Huang
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Frances J. Morin
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Jennifer E. Laaser
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
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120
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Williamson JB, Lewis SE, Johnson RR, Manning IM, Leibfarth FA. C−H Functionalization of Commodity Polymers. Angew Chem Int Ed Engl 2019; 58:8654-8668. [DOI: 10.1002/anie.201810970] [Citation(s) in RCA: 100] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2018] [Indexed: 11/08/2022]
Affiliation(s)
- Jill B. Williamson
- Department of ChemistryThe University of North Carolina at Chapel Hill 125 South Rd Chapel Hill NC 27599 USA
| | - Sally E. Lewis
- Department of ChemistryThe University of North Carolina at Chapel Hill 125 South Rd Chapel Hill NC 27599 USA
| | - Robert R. Johnson
- Department of ChemistryThe University of North Carolina at Chapel Hill 125 South Rd Chapel Hill NC 27599 USA
| | - Irene M. Manning
- Department of ChemistryThe University of North Carolina at Chapel Hill 125 South Rd Chapel Hill NC 27599 USA
| | - Frank A. Leibfarth
- Department of ChemistryThe University of North Carolina at Chapel Hill 125 South Rd Chapel Hill NC 27599 USA
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121
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Powell CR, Kaur K, Dillon KM, Zhou M, Alaboalirat M, Matson JB. Functional N-Substituted N-Thiocarboxyanhydrides as Modular Tools for Constructing H 2S Donor Conjugates. ACS Chem Biol 2019; 14:1129-1134. [PMID: 31180636 DOI: 10.1021/acschembio.9b00248] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report a synthetic route toward a family of functional COS/H2S-releasing N-substituted N-thiocarboxyanhydrides (NTAs) with functionalities to accommodate popular conjugation reactions, including olefin cross metathesis, thiol-ene, and copper-catalyzed azide-alkyne cycloaddition. The N-substituted NTAs were attached to small molecules, polymers, and a protein to synthesize novel H2S donors convergently. All conjugates showed sustained H2S release kinetics.
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Affiliation(s)
- Chadwick R. Powell
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
- Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, United States
- Macromolecules Innovation Institute, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Kuljeet Kaur
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
- Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, United States
- Macromolecules Innovation Institute, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Kearsley M. Dillon
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
- Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, United States
- Macromolecules Innovation Institute, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Mingjun Zhou
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
- Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, United States
- Macromolecules Innovation Institute, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Mohammed Alaboalirat
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
- Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, United States
- Macromolecules Innovation Institute, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - John B. Matson
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
- Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, United States
- Macromolecules Innovation Institute, Virginia Tech, Blacksburg, Virginia 24061, United States
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122
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Alagi P, Hadjichristidis N, Gnanou Y, Feng X. Fast and Complete Neutralization of Thiocarbonylthio Compounds Using Trialkylborane and Oxygen: Application to Their Removal from RAFT-Synthesized Polymers. ACS Macro Lett 2019; 8:664-669. [PMID: 35619521 DOI: 10.1021/acsmacrolett.9b00357] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A rapid and efficient method to remove thiocarbonylthio end groups from polymers prepared by reversible addition-fragmentation chain transfer (RAFT) is described. The elimination process is obtained in less than 1 min by treating the solution of RAFT-synthesized polymers with 5 equiv of trialkylborane (TAB) in the presence of oxygen under an ambient temperature. The versatility of this method was checked on the most relevant families of thiocarbonylthio chain transfer agents (CTA), including dithioesters, trithiocarbonates, dithiocarbamates, and xanthates, carried by the corresponding RAFT-synthesized polymers. UV, NMR, and MALDI-TOF MS characterization results all confirm the complete removal of their terminal CTA groups.
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123
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Bekanova MZ, Neumolotov NK, Jablanović AD, Plutalova AV, Chernikova EV, Kudryavtsev YV. Thermal stability of RAFT-based poly(methyl methacrylate): A kinetic study of the dithiobenzoate and trithiocarbonate end-group effect. Polym Degrad Stab 2019. [DOI: 10.1016/j.polymdegradstab.2019.03.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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124
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Way DV, Braido RS, Dos Reis SA, Lara FA, Pinto JC. Miniemulsion RAFT Copolymerization of MMA with Acrylic Acid and Methacrylic Acid and Bioconjugation with BSA. NANOMATERIALS 2019; 9:nano9060828. [PMID: 31159326 PMCID: PMC6631247 DOI: 10.3390/nano9060828] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 04/17/2019] [Accepted: 04/22/2019] [Indexed: 12/02/2022]
Abstract
Polymerization through reversible addition-fragmentation chain-transfer (RAFT) polymerization has been extensively employed for the production of polymers with controlled molar mass, complex architectures and copolymer composition distributions intended for biomedical and pharmaceutical applications. In the present work, RAFT miniemulsion copolymerizations of methyl methacrylate with acrylic acid and methacrylic acid were conducted to prepare hydrophilic polymer nanoparticles and compare cell uptake results after bioconjugation with bovine serum albumin (BSA), used as a model biomolecule. Obtained results indicate that the RAFT agent 2-cyano-propyl-dithiobenzoate allowed for successful free radical controlled methyl methacrylate copolymerizations and performed better when methacrylic acid was used as comonomer. Results also indicate that poly(methyl methacrylate-co-methacrylic acid) nanoparticles prepared by RAFT copolymerization and bioconjugated with BSA were exceptionally well accepted by cells, when compared to the other produced polymer nanoparticles because cellular uptake levels were much higher for particles prepared in presence of methacrylic acid, which can probably be associated to its high hydrophilicity.
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Affiliation(s)
- Débora Vieira Way
- Programa de Engenharia Química/COPPE-Universidade Federal do Rio de Janeiro, Cidade Universitária 68502, Rio de Janeiro-21941-972 RJ, Brazil.
| | - Rayany Stôcco Braido
- Programa de Engenharia Química/COPPE-Universidade Federal do Rio de Janeiro, Cidade Universitária 68502, Rio de Janeiro-21941-972 RJ, Brazil.
| | - Sabrina Alves Dos Reis
- Laboratory of Cellular Microbiology, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, Rio de Janeiro-21045-900RJ, Brazil.
| | - Flávio Alves Lara
- Laboratory of Cellular Microbiology, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, Rio de Janeiro-21045-900RJ, Brazil.
| | - José Carlos Pinto
- Programa de Engenharia Química/COPPE-Universidade Federal do Rio de Janeiro, Cidade Universitária 68502, Rio de Janeiro-21941-972 RJ, Brazil.
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125
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Uchiyama M, Satoh K, Kamigaito M. Cooperative reduction of various RAFT polymer terminals using hydrosilane and thiol via polarity reversal catalysis. Chem Commun (Camb) 2019; 55:5327-5330. [PMID: 30939181 DOI: 10.1039/c9cc00900k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cooperative reduction of thiocarbonylthio terminals of polymers obtained by RAFT polymerization was investigated using a catalytic amount of thiol as a polarity reversal catalyst in conjunction with hydrosilane as a reducing agent. A combination of C12H25SH and Ph3SiH enabled the complete removal of xanthate, dithiobenzoate, and trithiocarbonate groups from poly(vinyl acetate), polystyrene, and poly(methyl acrylate) under the radical conditions.
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Affiliation(s)
- Mineto Uchiyama
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan.
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126
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Abstract
Replacing petro-based materials with renewably sourced ones has clearly been applied to polymers, such as those derived from itaconic acid (IA) and its derivatives. Di-n-butyl itaconate (DBI) was (co)polymerized via nitroxide mediated polymerization (NMP) to impart elastomeric (rubber) properties. Homopolymerization of DBI by NMP was not possible, due to a stable adduct being formed. However, DBI/styrene (S) copolymerization by NMP at various initial molar feed compositions fDBI,0 was polymerizable at different reaction temperatures (70–110 °C) in 1,4 dioxane solution. DBI/S copolymerizations largely obeyed first order kinetics for initial DBI compositions of 10% to 80%. Number-average molecular weight (Mn) versus conversion for various DBI/S copolymerizations however showed significant deviations from the theoretical Mn as a result of chain transfer reactions (that are more likely to occur at high temperatures) and/or the poor reactivity of DBI via an NMP mechanism. In order to suppress possible intramolecular chain transfer reactions, the copolymerization was performed at 70 °C and for a longer time (72 h) with fDBI,0 = 50%–80%, and some slight improvements regarding the dispersity (Ð = 1.3–1.5), chain activity and conversion (~50%) were observed for the less DBI-rich compositions. The statistical copolymers produced showed a depression in Tg relative to poly(styrene) homopolymer, indicating the effect of DBI incorporation.
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127
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128
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Ershov AY, Vasilyeva MY, Levit ML, Lagoda IV, Baygildin VA, Shabsels BM, Martynenkov AA, Yakimansky AV. Synthesis of Gold Glyconanoparticles Based on Thiol-Containing d-Hexose Acylhydrazones and Their Modification by Thiolated Poly(2-deoxy-2-methacryloylamino-D-glucose). RUSS J GEN CHEM+ 2019. [DOI: 10.1134/s107036321902021x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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129
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Preparation of photochromic liquid core nanocapsules based on theoretical design. J Colloid Interface Sci 2019; 547:318-329. [PMID: 30965230 DOI: 10.1016/j.jcis.2019.04.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 04/02/2019] [Accepted: 04/03/2019] [Indexed: 12/27/2022]
Abstract
Photochromic materials have attracted considerable attention for their practical applications in optoelectronic devices. In this study, we developed the photochromic liquid core nanocapsules by polymerization of oil-in-water (O/W) nanoemulsion monomer droplets on the basis of Hansen solubility parameters. The thermoresponsive amphiphilic block copolymers (POEGMAm-b-PStn and POEGMAm-b-PMMAn) were synthesized by sequential reversible addition fragmentation chain transfer (RAFT) polymerization of hydrophilic oligo(ethylene glycol) methyl ether methacrylate and hydrophobic styrene or MMA. The O/W nanoemulsion methyl methacrylate (MMA) droplets, dissolving dipropylene glycol methyl-n-propyl ether (DPMNP) and (E)-3-(adamantan-2-ylidene)-4-[1-(2,5-dimethyl-3-furyl) ethylidene]dihydro-2,5furandione (Aberchrome 670) as a core liquid and a photochromic dye, respectively, were obtained through the phase inversion temperature emulsification technique using POEGMAm-b-PStn as a surfactant. As theoretically predicted in terms of the spreading coefficients, the DPMNP solution of Aberchrome 670 was successfully encapsulated by coacervation of the crosslinked PMMA condensed phase. Aberchrome 670 dissolved in a liquid core was found to photoisomerize twice as fast as that dispersed in the solid polymer matrices.
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130
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Ren H, Qiu XP, Shi Y, Yang P, Winnik FM. pH-Dependent Morphology and Photoresponse of Azopyridine-Terminated Poly( N-isopropylacrylamide) Nanoparticles in Water. Macromolecules 2019; 52:2939-2948. [PMID: 31496545 PMCID: PMC6727601 DOI: 10.1021/acs.macromol.9b00193] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Revised: 03/17/2019] [Indexed: 01/01/2023]
Abstract
![]()
A series of azopyridine-terminated
poly(N-isopropylacrylamide)s
(PNIPAM) (C12-PN-AzPy) (∼5000 < Mw < 20 000 g mol–1, polydispersity index
1.25 or less) were prepared by reversible addition–fragmentation
chain-transfer polymerization of NIPAM in the presence of a chain-transfer
agent that contains an AzPy group and an n-dodecyl
chain. In cold water, the polymers form nanoparticles (5.9 nm < Rh < 10.9 nm) that were characterized by light
scattering (LS), 1H NMR diffusion experiments, and high-resolution
transmission electron microscopy. We monitored the pH-dependent photoisomerization
of C12-PN-AzPy nanoparticles by steady-state and time-resolved UV–vis
absorption spectroscopy. Azopyridine is known to undergo a very fast
cis-to-trans thermal relaxation when the azopyridine nitrogen is quaternized
or bound to a hydrogen bond donor. The cis-to-trans thermal relaxation
of the AzPy chromophore in an acidic nanoparticle suspension is very
fast with a half-life τ = 2.3 ms at pH 3.0. It slows down slightly
for nanoparticles in neutral water (τ = 0.96 s, pH 7.0), and
it is very slow for AzPy-PNIPAM particles in alkaline medium (τ
> 3600 s, pH 10). The pH-dependent dynamics of the cis-to-trans
dark
relaxation, supported by Fourier transform infrared spectroscopy, 1H NMR spectroscopy, and LS analysis, suggest that in acidic
medium, the nanoparticles consist of a core of assembled C12 chains
surrounded by a shell of hydrated PNIPAM chains with the AzPy+ end groups preferentially located near the particle/water
interface. In neutral medium, the shell surrounding the core contains
AzPy groups H-bonded to the amide hydrogen of the PNIPAM chain repeat
units. At pH 10.0, the amide hydrogen binds preferentially to the
hydroxide anions. The AzPy groups reside preferentially in the vicinity
of the C12 core of the nanoparticles. The morphology of the nanoparticles
results from the competition between the segregation of the hydrophobic
and hydrophilic components and weak attractive interactions, such
as H-bonds between the AzPy groups and the amide hydrogen of the PNIPAM
repeat units.
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Affiliation(s)
- Hao Ren
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China
| | - Xing-Ping Qiu
- Department of Chemistry, University of Montreal, CP 6128 Succursale Centre Ville, Montreal, Quebec H3C 3J7, Canada
| | - Yan Shi
- School of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Peng Yang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China
| | - Françoise M Winnik
- Laboratory of Polymer Chemistry, Department of Chemistry, University of Helsinki, PB 55, Helsinki FI00140 Finland.,International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
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131
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Li C, Wang C, Ji Z, Jiang N, Lin W, Li D. Synthesis of thiol-terminated thermoresponsive polymers and their enhancement effect on optical limiting property of gold nanoparticles. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.02.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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132
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López-Pérez L, Maldonado-Textle H, Elizalde-Herrera LE, Telles-Padilla JG, Guerrero-Santos R, Collins S, Jiménez-Regalado EJ, St Thomas C. Methylation of poly(acrylic acid), prepared using RAFT polymerization, with trimethylsilyldiazomethane: A metamorphosis of the thiocarbonyl group to a thiol-end group. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.02.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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133
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Williamson JB, Lewis SE, Johnson RR, Manning IM, Leibfarth FA. C‐H‐Funktionalisierung von Standardpolymeren. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201810970] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Jill B. Williamson
- Department of ChemistryThe University of North Carolina at Chapel Hill 125 South Rd Chapel Hill NC 27599 USA
| | - Sally E. Lewis
- Department of ChemistryThe University of North Carolina at Chapel Hill 125 South Rd Chapel Hill NC 27599 USA
| | - Robert R. Johnson
- Department of ChemistryThe University of North Carolina at Chapel Hill 125 South Rd Chapel Hill NC 27599 USA
| | - Irene M. Manning
- Department of ChemistryThe University of North Carolina at Chapel Hill 125 South Rd Chapel Hill NC 27599 USA
| | - Frank A. Leibfarth
- Department of ChemistryThe University of North Carolina at Chapel Hill 125 South Rd Chapel Hill NC 27599 USA
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134
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Cozzens Y, Steeves DM, Soares JW, Whitten JE. Light-Sensitive Gas Sensors Based on Thiol-Functionalized N-Isopropylacrylamide Polymer–Gold Nanoparticle Composite Films. Macromolecules 2019. [DOI: 10.1021/acs.macromol.8b02638] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yuqing Cozzens
- Department of Chemistry, University of Massachusetts Lowell, Lowell, Massachusetts 01854, United States
| | - Diane M. Steeves
- U.S. Army Combat
Capabilities Development Command Soldier Center, Natick, Massachusetts 01760, United States
| | - Jason W. Soares
- U.S. Army Combat
Capabilities Development Command Soldier Center, Natick, Massachusetts 01760, United States
| | - James E. Whitten
- Department of Chemistry, University of Massachusetts Lowell, Lowell, Massachusetts 01854, United States
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135
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Elkin T, Copp SM, Hamblin RL, Martinez JS, Montaño GA, Rocha RC. Synthesis of Terpyridine-Terminated Amphiphilic Block Copolymers and Their Self-Assembly into Metallo-Polymer Nanovesicles. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E601. [PMID: 30781571 PMCID: PMC6416640 DOI: 10.3390/ma12040601] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2019] [Revised: 02/08/2019] [Accepted: 02/12/2019] [Indexed: 01/14/2023]
Abstract
Polystyrene-b-polyethylene glycol (PS-b-PEG) amphiphilic block copolymers featuring a terminal tridentate N,N,N-ligand (terpyridine) were synthesized for the first time through an efficient route. In this approach, telechelic chain-end modified polystyrenes were produced via reversible addition-fragmentation chain-transfer (RAFT) polymerization by using terpyridine trithiocarbonate as the chain-transfer agent, after which the hydrophilic polyethylene glycol (PEG) block was incorporated into the hydrophobic polystyrene (PS) block in high yields via a thiol-ene process. Following metal-coordination with Mn2+, Fe2+, Ni2+, and Zn2+, the resulting metallo-polymers were self-assembled into spherical, vesicular nanostructures, as characterized by dynamic light scattering and transmission electron microscopy (TEM) imaging.
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Affiliation(s)
- Tatyana Elkin
- Los Alamos National Laboratory, Center for Integrated Nanotechnologies, Los Alamos, NM 87545, USA.
| | - Stacy M Copp
- Los Alamos National Laboratory, Center for Integrated Nanotechnologies, Los Alamos, NM 87545, USA.
| | - Ryan L Hamblin
- Los Alamos National Laboratory, Center for Integrated Nanotechnologies, Los Alamos, NM 87545, USA.
| | - Jennifer S Martinez
- Los Alamos National Laboratory, Center for Integrated Nanotechnologies, Los Alamos, NM 87545, USA.
- Center for Materials Interfaces in Research and Applications and Program of Applied Physics and Materials Science, Northern Arizona University, Flagstaff, AZ 86011, USA.
| | - Gabriel A Montaño
- Los Alamos National Laboratory, Center for Integrated Nanotechnologies, Los Alamos, NM 87545, USA.
- Center for Materials Interfaces in Research and Applications and Program of Applied Physics and Materials Science, Northern Arizona University, Flagstaff, AZ 86011, USA.
| | - Reginaldo C Rocha
- Los Alamos National Laboratory, Center for Integrated Nanotechnologies, Los Alamos, NM 87545, USA.
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136
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Kennemur JG. Poly(vinylpyridine) Segments in Block Copolymers: Synthesis, Self-Assembly, and Versatility. Macromolecules 2019. [DOI: 10.1021/acs.macromol.8b01661] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Justin G. Kennemur
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, United States
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137
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Cavalli F, De Keer L, Huber B, Van Steenberge PHM, D'hooge DR, Barner L. A kinetic study on the para-fluoro-thiol reaction in view of its use in materials design. Polym Chem 2019. [DOI: 10.1039/c9py00435a] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A detailed kinetic study on the para-fluoro-thiol reaction (PFTR) using experimental analysis and kinetic Monte Carlo modeling is introduced, covering the difference in reactivity of a selected variety of structurally different thiols, uniquely including polymeric thiols.
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Affiliation(s)
- Federica Cavalli
- Soft Matter Synthesis Laboratory
- Institut für Biologische Grenzflächen
- Karlsruhe Institute of Technology (KIT)
- Eggenstein-Leopoldshafen
- Germany
| | - Lies De Keer
- Laboratory for Chemical Technology (LCT)
- Ghent University
- 9052 Zwijnaarde (Ghent)
- Belgium
| | - Birgit Huber
- Soft Matter Synthesis Laboratory
- Institut für Biologische Grenzflächen
- Karlsruhe Institute of Technology (KIT)
- Eggenstein-Leopoldshafen
- Germany
| | | | - Dagmar R. D'hooge
- Laboratory for Chemical Technology (LCT)
- Ghent University
- 9052 Zwijnaarde (Ghent)
- Belgium
- Centre for Textile Science and Engineering (CTSE)
| | - Leonie Barner
- Soft Matter Synthesis Laboratory
- Institut für Biologische Grenzflächen
- Karlsruhe Institute of Technology (KIT)
- Eggenstein-Leopoldshafen
- Germany
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138
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Messina MS, Graefe CT, Chong P, Ebrahim OM, Pathuri RS, Bernier NA, Mills HA, Rheingold AL, Frontiera RR, Maynard HD, Spokoyny AM. Carborane RAFT agents as tunable and functional molecular probes for polymer materials. Polym Chem 2019. [DOI: 10.1039/c9py00199a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Carborane RAFT agents are introduced as tunable multi-purpose tools acting as 1H NMR spectroscopic handles, Raman probes, and recognition units.
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Affiliation(s)
- Marco S. Messina
- Department of Chemistry and Biochemistry
- University of California
- Los Angeles
- USA
| | | | - Paul Chong
- Department of Chemistry and Biochemistry
- University of California
- Los Angeles
- USA
- Department of Chemistry
| | - Omar M. Ebrahim
- Department of Chemistry and Biochemistry
- University of California
- Los Angeles
- USA
| | - Ramya S. Pathuri
- Department of Chemistry and Biochemistry
- University of California
- Los Angeles
- USA
| | - Nicholas A. Bernier
- Department of Chemistry and Biochemistry
- University of California
- Los Angeles
- USA
| | - Harrison A. Mills
- Department of Chemistry and Biochemistry
- University of California
- Los Angeles
- USA
| | | | | | - Heather D. Maynard
- Department of Chemistry and Biochemistry
- University of California
- Los Angeles
- USA
- California NanoSystems Institute
| | - Alexander M. Spokoyny
- Department of Chemistry and Biochemistry
- University of California
- Los Angeles
- USA
- California NanoSystems Institute
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139
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Docherty PJ, Derry MJ, Armes SP. RAFT dispersion polymerization of glycidyl methacrylate for the synthesis of epoxy-functional block copolymer nanoparticles in mineral oil. Polym Chem 2019. [DOI: 10.1039/c8py01584h] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Epoxy-functional poly(stearyl methacrylate)-poly(glycidyl methacrylate) (PSMA-PGlyMA) diblock copolymer nanoparticles are synthesized via reversible addition–fragmentation chain transfer (RAFT) dispersion polymerization of glycidyl methacrylate (GlyMA) in mineral oil at 70 °C.
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Affiliation(s)
| | | | - Steven P. Armes
- Department of Chemistry
- The University of Sheffield
- Sheffield
- UK
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140
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Le D, Wagner F, Takamiya M, Hsiao IL, Gil Alvaradejo G, Strähle U, Weiss C, Delaittre G. Straightforward access to biocompatible poly(2-oxazoline)-coated nanomaterials by polymerization-induced self-assembly. Chem Commun (Camb) 2019; 55:3741-3744. [DOI: 10.1039/c9cc00407f] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Poly(2-ethyl-2-oxazoline) chain transfer agents are employed in photoinitiated RAFT PISA, providing access to biocompatible core–shell polymeric nanostructures with various morphologies.
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Affiliation(s)
- Dao Le
- Institute of Toxicology and Genetics (ITG)
- Karlsruhe Institute of Technology (KIT)
- 76344 Eggenstein-Leopoldshafen
- Germany
- Institute for Chemical Technology and Polymer Chemistry (ITCP)
| | - Friederike Wagner
- Institute of Toxicology and Genetics (ITG)
- Karlsruhe Institute of Technology (KIT)
- 76344 Eggenstein-Leopoldshafen
- Germany
- Institute for Chemical Technology and Polymer Chemistry (ITCP)
| | - Masanari Takamiya
- Institute of Toxicology and Genetics (ITG)
- Karlsruhe Institute of Technology (KIT)
- 76344 Eggenstein-Leopoldshafen
- Germany
| | - I-Lun Hsiao
- Institute of Toxicology and Genetics (ITG)
- Karlsruhe Institute of Technology (KIT)
- 76344 Eggenstein-Leopoldshafen
- Germany
- School of Food Safety
| | - Gabriela Gil Alvaradejo
- Institute of Toxicology and Genetics (ITG)
- Karlsruhe Institute of Technology (KIT)
- 76344 Eggenstein-Leopoldshafen
- Germany
- Institute for Chemical Technology and Polymer Chemistry (ITCP)
| | - Uwe Strähle
- Institute of Toxicology and Genetics (ITG)
- Karlsruhe Institute of Technology (KIT)
- 76344 Eggenstein-Leopoldshafen
- Germany
| | - Carsten Weiss
- Institute of Toxicology and Genetics (ITG)
- Karlsruhe Institute of Technology (KIT)
- 76344 Eggenstein-Leopoldshafen
- Germany
| | - Guillaume Delaittre
- Institute of Toxicology and Genetics (ITG)
- Karlsruhe Institute of Technology (KIT)
- 76344 Eggenstein-Leopoldshafen
- Germany
- Institute for Chemical Technology and Polymer Chemistry (ITCP)
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141
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Modular core-shell polymeric nanoparticles mimicking viral structures for vaccination. J Control Release 2019; 293:48-62. [DOI: 10.1016/j.jconrel.2018.11.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Revised: 10/23/2018] [Accepted: 11/04/2018] [Indexed: 12/14/2022]
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142
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Alaboalirat M, Qi L, Arrington KJ, Qian S, Keum JK, Mei H, Littrell KC, Sumpter BG, Carrillo JMY, Verduzco R, Matson JB. Amphiphilic Bottlebrush Block Copolymers: Analysis of Aqueous Self-Assembly by Small-Angle Neutron Scattering and Surface Tension Measurements. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b02366] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Mohammed Alaboalirat
- Department of Chemistry and Macromolecules Innovation Institute, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Luqing Qi
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005, United States
| | - Kyle J. Arrington
- Department of Chemistry and Macromolecules Innovation Institute, Virginia Tech, Blacksburg, Virginia 24061, United States
| | | | | | - Hao Mei
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005, United States
| | | | | | | | - Rafael Verduzco
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005, United States
| | - John B. Matson
- Department of Chemistry and Macromolecules Innovation Institute, Virginia Tech, Blacksburg, Virginia 24061, United States
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143
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Zhang Y, Wen X, Shi Y, Yue R, Bai L, Liu Q, Ba X. Sulfur-Containing Polymer As a Platform for Synthesis of Size-Controlled Pd Nanoparticles for Selective Semihydrogenation of Alkynes. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b04913] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yuangong Zhang
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People’s Republic of China
| | - Xin Wen
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People’s Republic of China
| | - Yongqing Shi
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People’s Republic of China
| | - Ru Yue
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People’s Republic of China
| | - Libin Bai
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People’s Republic of China
| | - Qingtao Liu
- Hebei Chemical and Pharmaceutical College, Shijiazhuang 050026, People’s Republic of China
| | - Xinwu Ba
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People’s Republic of China
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144
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Lueckerath T, Strauch T, Koynov K, Barner-Kowollik C, Ng DYW, Weil T. DNA–Polymer Conjugates by Photoinduced RAFT Polymerization. Biomacromolecules 2018; 20:212-221. [DOI: 10.1021/acs.biomac.8b01328] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Thorsten Lueckerath
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Tina Strauch
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Kaloian Koynov
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Christopher Barner-Kowollik
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), George Street, Brisbane, Queensland 4000, Australia
- Macromolecular Architectures, Institut für Technische Chemie und Polymerchemie, Karlsruhe Institute of Technology (KIT), Engesserstraße 18, 76131 Karlsruhe, Germany
| | - David Y. W. Ng
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Tanja Weil
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
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145
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Rodríguez-Arco L, Poma A, Ruiz-Pérez L, Scarpa E, Ngamkham K, Battaglia G. Molecular bionics - engineering biomaterials at the molecular level using biological principles. Biomaterials 2018; 192:26-50. [PMID: 30419394 DOI: 10.1016/j.biomaterials.2018.10.044] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 10/06/2018] [Accepted: 10/28/2018] [Indexed: 12/18/2022]
Abstract
Life and biological units are the result of the supramolecular arrangement of many different types of molecules, all of them combined with exquisite precision to achieve specific functions. Taking inspiration from the design principles of nature allows engineering more efficient and compatible biomaterials. Indeed, bionic (from bion-, unit of life and -ic, like) materials have gained increasing attention in the last decades due to their ability to mimic some of the characteristics of nature systems, such as dynamism, selectivity, or signalling. However, there are still many challenges when it comes to their interaction with the human body, which hinder their further clinical development. Here we review some of the recent progress in the field of molecular bionics with the final aim of providing with design rules to ensure their stability in biological media as well as to engineer novel functionalities which enable navigating the human body.
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Affiliation(s)
- Laura Rodríguez-Arco
- Department of Chemistry, University College London (UCL) 20 Gordon St, Kings Cross, London, WC1H 0AJ, UK; Institute for Physics of Living Systems, University College London, London, UK.
| | - Alessandro Poma
- Department of Chemistry, University College London (UCL) 20 Gordon St, Kings Cross, London, WC1H 0AJ, UK; Institute for Physics of Living Systems, University College London, London, UK
| | - Lorena Ruiz-Pérez
- Department of Chemistry, University College London (UCL) 20 Gordon St, Kings Cross, London, WC1H 0AJ, UK; Institute for Physics of Living Systems, University College London, London, UK; The EPRSC/Jeol Centre of Liquid Electron Microscopy, University College London, London, WC1H 0AJ, UK
| | - Edoardo Scarpa
- Department of Chemistry, University College London (UCL) 20 Gordon St, Kings Cross, London, WC1H 0AJ, UK; Institute for Physics of Living Systems, University College London, London, UK
| | - Kamolchanok Ngamkham
- Faculty of Engineering, King Mongkut's University of Technology Thonbury, 126 Pracha Uthit Rd., Bang Mod, Thung Khru, Bangkok, 10140, Thailand
| | - Giuseppe Battaglia
- Department of Chemistry, University College London (UCL) 20 Gordon St, Kings Cross, London, WC1H 0AJ, UK; Institute for Physics of Living Systems, University College London, London, UK; The EPRSC/Jeol Centre of Liquid Electron Microscopy, University College London, London, WC1H 0AJ, UK.
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146
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Cornel EJ, van Meurs S, Smith T, O’Hora PS, Armes SP. In Situ Spectroscopic Studies of Highly Transparent Nanoparticle Dispersions Enable Assessment of Trithiocarbonate Chain-End Fidelity during RAFT Dispersion Polymerization in Nonpolar Media. J Am Chem Soc 2018; 140:12980-12988. [PMID: 30252464 PMCID: PMC6187374 DOI: 10.1021/jacs.8b07953] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Indexed: 01/09/2023]
Abstract
We report the synthesis of highly transparent poly(stearyl methacrylate)-poly(2,2,2-trifluoroethyl methacrylate) (PSMA-PTFEMA) diblock copolymer nanoparticles via polymerization-induced self-assembly (PISA) in nonpolar media at 70 °C. This was achieved by chain-extending a PSMA precursor block via reversible addition-fragmentation chain transfer (RAFT) dispersion polymerization of TFEMA in n-tetradecane. This n-alkane has the same refractive index as the PTFEMA core-forming block at 70 °C, which ensures high light transmittance when targeting 33 nm spherical nanoparticles. Such isorefractivity enables visible absorption spectra to be recorded with minimal light scattering even at 30% w/w solids. However, in situ monitoring of the trithiocarbonate RAFT end-groups during PISA requires selection of a weak n → π* band at 446 nm. Conversion of TFEMA into PTFEMA causes a contraction in the reaction solution volume, leading to an initial increase in absorbance that enables the kinetics of polymerization to be monitored via dilatometry. At ∼98% TFEMA conversion, this 446 nm band remains constant for 2 h at 70 °C, indicating surprisingly high RAFT chain-end fidelity (and hence pseudoliving character) under monomer-starved conditions. In situ 19F NMR spectroscopy studies provide evidence for (i) the onset of micellar nucleation, (ii) solvation of the nanoparticle cores by TFEMA monomer, and (iii) surface plasticization of the nanoparticle cores by n-tetradecane at 70 °C. Finally, the kinetics of RAFT chain-end removal can be conveniently monitored by in situ visible absorption spectroscopy: addition of excess initiator at 70 °C causes complete discoloration of the dispersion, with small-angle X-ray scattering studies confirming no change in nanoparticle morphology under these conditions.
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Affiliation(s)
- Erik J. Cornel
- Dainton
Building, Department of Chemistry, University
of Sheffield, Brook Hill, Sheffield, South
Yorkshire S3 7HF, United Kingdom
| | - Sandra van Meurs
- Dainton
Building, Department of Chemistry, University
of Sheffield, Brook Hill, Sheffield, South
Yorkshire S3 7HF, United Kingdom
| | - Timothy Smith
- Lubrizol
Ltd., Nether Lane, Hazelwood, Derbyshire DE56 4AN, United Kingdom
| | - Paul S. O’Hora
- Lubrizol
Ltd., Nether Lane, Hazelwood, Derbyshire DE56 4AN, United Kingdom
| | - Steven P. Armes
- Dainton
Building, Department of Chemistry, University
of Sheffield, Brook Hill, Sheffield, South
Yorkshire S3 7HF, United Kingdom
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147
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Golf H, O'Shea R, Braybrook C, Hutt O, Lupton DW, Hooper JF. RAFT polymer cross-coupling with boronic acids. Chem Sci 2018; 9:7370-7375. [PMID: 30542540 PMCID: PMC6237125 DOI: 10.1039/c8sc01862f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Accepted: 07/17/2018] [Indexed: 11/21/2022] Open
Abstract
The ability to modify the thiocarbonylthio end-groups of RAFT polymers is important for applications where an inert or highly functionalised material is required. Here we report a copper promoted cross-coupling reaction between RAFT polymer end-groups and aryl boronic acids. This method gives high conversion to the modified polymers, and is compatible with a wide variety of functional molecules.
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Affiliation(s)
- Hartwig Golf
- School of Chemistry , Monash University , Clayton , Melbourne , VIC 3800 , Australia . ;
| | - Riley O'Shea
- School of Chemistry , Monash University , Clayton , Melbourne , VIC 3800 , Australia . ;
| | | | - Oliver Hutt
- CSIRO , Research Way , Melbourne , VIC 3168 , Australia
| | - David W Lupton
- School of Chemistry , Monash University , Clayton , Melbourne , VIC 3800 , Australia . ;
| | - Joel F Hooper
- School of Chemistry , Monash University , Clayton , Melbourne , VIC 3800 , Australia . ;
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148
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A Critical Survey of Dithiocarbamate Reversible Addition‐Fragmentation Chain Transfer (RAFT) Agents in Radical Polymerization. ACTA ACUST UNITED AC 2018. [DOI: 10.1002/pola.29199] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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149
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Frayne SH, Northrop BH. Evaluating Nucleophile Byproduct Formation during Phosphine- and Amine-Promoted Thiol-Methyl Acrylate Reactions. J Org Chem 2018; 83:10370-10382. [PMID: 30132329 DOI: 10.1021/acs.joc.8b01471] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The commonly accepted mechanism of nucleophile-initiated thiol-acrylate reactions requires the formation of undesired nucleophile byproducts. A systematic evaluation of the formation of such nucleophile byproducts has been carried out to understand the relationships between byproduct formation and nucleophile structure, stoichiometry, solvent, and reaction type. Three common nucleophiles for thiol-Michael reactions were investigated: dimethylphenylphosphine (DMPP), diethylamine (DEA), and hexylamine (HA). The formation of phosphonium ester and aza-Michael byproducts upon initiating a representative thiol-acrylate reaction between 1-hexanethiol and methyl acrylate at a range of initiator loading (0.01-10.0 equiv) and in different solvents (neat, DMSO, THF, and CHCl3) was determined by 1H NMR spectroscopy. The influence of reaction type was investigated by expanding from small molecule reactions to end group thiol-acrylate functionalization of PEG-diacrylate polymers and through investigations of polymer-polymer coupling reactions. Results indicate that the propensity of forming nucleophile byproducts varies with nucleophile type, solvent, and reaction type. Interestingly, for all but polymer-polymer ligation reactions, nucleophile byproduct formation is largely unobserved for nitrogen-centered nucleophiles DEA and HA and essentially nonexistent for the phorphorous-centered nucleophile DMPP. A rationale for the differences in nucleophile byproduct formation for DMPP, DEA, and HA is proposed and supported by experimental and computational analysis.
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Affiliation(s)
- Stephen H Frayne
- Department of Chemistry , Wesleyan University , Middletown , Connecticut 06459 , United States
| | - Brian H Northrop
- Department of Chemistry , Wesleyan University , Middletown , Connecticut 06459 , United States
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150
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Battistella C, Yang Y, Chen J, Klok HA. Synthesis and Postpolymerization Modification of Fluorine-End-Labeled Poly(Pentafluorophenyl Methacrylate) Obtained via RAFT Polymerization. ACS OMEGA 2018; 3:9710-9721. [PMID: 31459100 PMCID: PMC6644891 DOI: 10.1021/acsomega.8b01654] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Accepted: 08/09/2018] [Indexed: 06/10/2023]
Abstract
Chain-end-labeled polymers are interesting for a range of applications. In polymer nanomedicine, chain-end-labeled polymers are useful to study and help understand cellular internalization and intracellular trafficking processes. The recent advent of fluorescent label-free techniques, such as nanoscale secondary ion mass spectrometry (NanoSIMS), provides access to high-resolution intracellular mapping that can complement information obtained using fluorescent-labeled materials and confocal microscopy and flow cytometry. Using poly(N-(2-hydroxypropyl)methacrylamide) (PHPMA) as a prototypical polymer nanomedicine, this paper presents a synthetic strategy to polymers that contain trace element labels, such as fluorine, which can be used for NanoSIMS analysis. The strategy presented in this paper is based on reversible addition fragmentation chain transfer (RAFT) polymerization of pentafluorophenyl methacrylate (PFMA) mediated by two novel chain-transfer agents (CTAs), which contain either one (α) or two (α,ω) fluorine labels. In the first part of this study, via a number of polymerization experiments, the polymerization properties of the fluorinated RAFT CTAs were established. 19F NMR spectroscopy revealed that these fluorinated RAFT agents possess unique spectral signatures, which allow to directly monitor RAFT agent conversion and measure end-group fidelity. Comparison with 4-cyanopentanoic acid dithiobenzoate, which is a standard CTA for the RAFT polymerization of PFMA, revealed that the introduction of one or two fluorine labels does not significantly affect the polymerization properties of the CTA. In the last part of this paper, a proof-of-concept study is presented that demonstrates the feasibility of the fluorine-labeled poly(pentafluorophenyl methacrylate) polymers as platforms for the postpolymerization modification to generate PHPMA-based polymer nanomedicines.
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Affiliation(s)
- Claudia Battistella
- Institut
des Matériaux et Institut des Sciences et Ingénierie
Chimiques, Laboratoire des Polymères, École Polytechnique Fédérale de Lausanne (EPFL), Bâtiment MXD, Station 12, CH-1015 Lausanne, Switzerland
| | - Yuejiao Yang
- School
of Environmental and Chemical Engineering, Shanghai University, 200444 Shanghai, China
| | - Jie Chen
- School
of Environmental and Chemical Engineering, Shanghai University, 200444 Shanghai, China
| | - Harm-Anton Klok
- Institut
des Matériaux et Institut des Sciences et Ingénierie
Chimiques, Laboratoire des Polymères, École Polytechnique Fédérale de Lausanne (EPFL), Bâtiment MXD, Station 12, CH-1015 Lausanne, Switzerland
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