51
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Tiwari DK, Pogula J, Tiwari DK. A general and practical route to 4,5-disubstituted oxazoles using acid chlorides and isocyanides. RSC Adv 2015. [DOI: 10.1039/c5ra07668d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An efficient and mild method for the synthesis of 4,5-di-substituted oxazolesvia[3 + 2] cycloaddition reaction of isocyanides and acid chlorides is reported.
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Affiliation(s)
- Dipak Kumar Tiwari
- Inorganic and Physical Chemistry Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad-500007
- India
| | - Jaya Pogula
- Inorganic and Physical Chemistry Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad-500007
- India
| | - Dharmendra Kumar Tiwari
- Inorganic and Physical Chemistry Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad-500007
- India
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52
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Kwon TW, Jeong YK, Lee I, Kim TS, Choi JW, Coskun A. Systematic molecular-level design of binders incorporating Meldrum's acid for silicon anodes in lithium rechargeable batteries. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:7979-7985. [PMID: 25339592 DOI: 10.1002/adma.201402950] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2014] [Revised: 09/15/2014] [Indexed: 06/04/2023]
Abstract
Covalent or Noncovalent? Systematic investigation of polymeric binders incorporating Meldrum's acid reveals most critical binder properties for silicon -anodes in lithium ion batteries, that is self-healing effect facilitated by a series of noncovalent interactions.
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Affiliation(s)
- Tae-woo Kwon
- Graduated School of EEWS and KAIST Institute NanoCentury, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 305-701, Korea
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53
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Zhu L, Tran H, Beyer FL, Walck SD, Li X, Ågren H, Killops KL, Campos LM. Engineering Topochemical Polymerizations Using Block Copolymer Templates. J Am Chem Soc 2014; 136:13381-7. [DOI: 10.1021/ja507318u] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Liangliang Zhu
- Department
of Chemistry, Columbia University, New York, New York 10027, United States
| | - Helen Tran
- Department
of Chemistry, Columbia University, New York, New York 10027, United States
| | - Frederick L. Beyer
- Army
Research Laboratory, Aberdeen Proving Ground, Maryland 21005, United States
| | - Scott D. Walck
- Army
Research Laboratory, Aberdeen Proving Ground, Maryland 21005, United States
| | - Xin Li
- Division
of Theoretical Chemistry and Biology, School of Biotechnology, KTH Royal Institute of Technology, SE-10691 Stockholm, Sweden
| | - Hans Ågren
- Division
of Theoretical Chemistry and Biology, School of Biotechnology, KTH Royal Institute of Technology, SE-10691 Stockholm, Sweden
| | - Kato L. Killops
- Edgewood
Chemical Biological Center, Aberdeen Proving Ground, Maryland 21010, United States
| | - Luis M. Campos
- Department
of Chemistry, Columbia University, New York, New York 10027, United States
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54
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Yang K, Jung H, Lee HR, Lee JS, Kim SR, Song KY, Cheong E, Bang J, Im SG, Cho SW. Multiscale, hierarchically patterned topography for directing human neural stem cells into functional neurons. ACS NANO 2014; 8:7809-7822. [PMID: 25050736 DOI: 10.1021/nn501182f] [Citation(s) in RCA: 105] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Various biophysical and biochemical factors are important for determining the fate of neural stem cells (NSCs). Among biophysical signals, topographical stimulation by micro/nanopatterns has been applied to control NSC differentiation. In this study, we developed a hierarchically patterned substrate (HPS) platform that can synergistically enhance the differentiation of human NSCs (hNSCs) by simultaneously providing microscale and nanoscale spatial controls to facilitate the alignment of the cytoskeleton and the formation of focal adhesions. The multiscale HPS was fabricated by combining microgroove patterns (groove size: 1.5 μm), prepared by a conventional photolithographic process, and nanopore patterns (pore diameter: 10 nm), prepared from cylinder-forming block copolymer thin films. The hNSCs grown on the HPS exhibited not only a highly aligned, elongated morphology, but also a greatly enhanced differentiation into neuronal and astrocyte lineages, compared to hNSCs on a flat substrate (FS) or single-type patterned substrates [microgroove patterned substrate (MPS) and nanopore patterned substrate (NPS)]. Interestingly, the application of the HPS directed hNSC differentiation toward neurons rather than astrocytes. The expression of focal adhesion proteins in hNSCs was also significantly increased on the HPS compared to the FS, MPS, and NPS, likely a result of the presence of more focal contact points provided by nanopore structures. Inhibition of both β1 integrin-mediated binding and the intracellular Rho-associated protein kinase pathway of hNSCs eliminated the beneficial effects of the HPS on focal adhesion formation and actin filament alignment, which subsequently reduced hNSC differentiation. More importantly, hNSCs on the HPS differentiated into functional neurons exhibiting sodium currents and action potentials. The multiscale, hierarchically patterned topography would be useful for the design of functional biomaterial scaffolds to potentiate NSC therapeutic efficacy.
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55
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An SY, Lee DG, Hwang JW, Kim KN, Nam JH, Jung HW, Noh SM, Oh JK. Photo-induced thiol-ene polysulfide-crosslinked materials with tunable thermal and mechanical properties. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/pola.27353] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- So Young An
- Department of Chemistry and Biochemistry and Center for Nanoscience Research (CENR); Concordia University; Montreal Quebec Canada H4B 1R6
| | - Dong Geun Lee
- Department of Chemical and Biological Engineering; Korea University; Seoul 136-713 Republic of Korea
| | - Ji Won Hwang
- Department of Chemical and Biological Engineering; Korea University; Seoul 136-713 Republic of Korea
| | - Kyung Nam Kim
- PPG Industries Korea; Cheonan 330-912 Republic of Korea
| | - Joon Hyun Nam
- Research Center for Green Fine Chemicals; Korea Research Institute of Chemical Technology; Ulsan 681-310 Republic of Korea
| | - Hyun Wook Jung
- Department of Chemical and Biological Engineering; Korea University; Seoul 136-713 Republic of Korea
| | - Seung Man Noh
- Research Center for Green Fine Chemicals; Korea Research Institute of Chemical Technology; Ulsan 681-310 Republic of Korea
| | - Jung Kwon Oh
- Department of Chemistry and Biochemistry and Center for Nanoscience Research (CENR); Concordia University; Montreal Quebec Canada H4B 1R6
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56
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Wang H, Desilles N, Burel F. Effect of tetra-n
-butylammonium bromide salt on the cationic polymerization of dimethylketene and on the thermal properties of the obtained polyketones. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/pola.27144] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Hanbin Wang
- Normandie Université, INSA de Rouen, CNRS UMR 6270 PBS & FR 3038 INC3M; 685 Avenue de l'Université, 76800 Saint Etienne du Rouvray France
| | - Nicolas Desilles
- Normandie Université, INSA de Rouen, CNRS UMR 6270 PBS & FR 3038 INC3M; 685 Avenue de l'Université, 76800 Saint Etienne du Rouvray France
| | - Fabrice Burel
- Normandie Université, INSA de Rouen, CNRS UMR 6270 PBS & FR 3038 INC3M; 685 Avenue de l'Université, 76800 Saint Etienne du Rouvray France
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57
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Yilmaz G, Iskin B, Yagci Y. Photoinduced Copper(I)-Catalyzed Click Chemistry by the Electron Transfer Process Using Polynuclear Aromatic Compounds. MACROMOL CHEM PHYS 2014. [DOI: 10.1002/macp.201400010] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Gorkem Yilmaz
- Istanbul Technical University, Faculty of Science; Department of Chemistry, Maslak; TR-34469 Istanbul Turkey
| | - Birol Iskin
- Istanbul Technical University, Faculty of Science; Department of Chemistry, Maslak; TR-34469 Istanbul Turkey
| | - Yusuf Yagci
- Istanbul Technical University, Faculty of Science; Department of Chemistry, Maslak; TR-34469 Istanbul Turkey
- King Abdulaziz University, Faculty of Science; Department of Chemistry; Jeddah Saudi Arabia
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58
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Groote R, Szyja BM, Leibfarth FA, Hawker CJ, Doltsinis NL, Sijbesma RP. Strain-Induced Strengthening of the Weakest Link: The Importance of Intermediate Geometry for the Outcome of Mechanochemical Reactions. Macromolecules 2014. [DOI: 10.1021/ma4022339] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ramon Groote
- Laboratory
of Macromolecular and Organic Chemistry and Institute for Complex
Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
| | - Bartłomiej M. Szyja
- Institut
für Festkörpertheorie, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Straße 10, 48149 Münster, Germany
| | - Frank A. Leibfarth
- Materials
Research Laboratory, Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, California 93101, United States
| | - Craig J. Hawker
- Materials
Research Laboratory, Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, California 93101, United States
| | - Nikos L. Doltsinis
- Institut
für Festkörpertheorie, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Straße 10, 48149 Münster, Germany
| | - Rint P. Sijbesma
- Laboratory
of Macromolecular and Organic Chemistry and Institute for Complex
Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
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59
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Ortony JH, Choi SH, Spruell JM, Hunt JN, Lynd NA, Krogstad DV, Urban VS, Hawker CJ, Kramer EJ, Han S. Fluidity and water in nanoscale domains define coacervate hydrogels. Chem Sci 2014. [DOI: 10.1039/c3sc52368c] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
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60
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Tyler SNG, Webster RL. Sterically hindered malonamide monomers for the step growth synthesis of polyesters and polyamides. Chem Commun (Camb) 2014; 50:10665-8. [DOI: 10.1039/c4cc03344b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Exploiting the ready cleavage of bulky amides in the presence of a simple nucleophile, a new monomer for step growth polymerisation has been realised. A range of novel polyesters and polyamides have been prepared under mild conditions that allow for efficient recycling and reuse of the amine by-product. The use of a Lewis acid to increase polyester molecular weight is also explored.
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61
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An SY, Hwang JW, Kim KN, Jung HW, Noh SM, Oh JK. Multifunctional linear methacrylate copolymer polyenes having pendant vinyl groups: Synthesis and photoinduced thiol-ene crosslinking polyaddition. ACTA ACUST UNITED AC 2013. [DOI: 10.1002/pola.27035] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- So Young An
- Department of Chemistry and Biochemistry and Center for Nanoscience Research (CENR); Concordia University; Montreal Quebec Canada H4B 1R6
| | - Ji Won Hwang
- Department of Chemical and Biological Engineering; Korea University; Seoul 136-713 Republic of Korea
| | - Kyung Nam Kim
- PPG Industries Korea; Cheonan 330-912 Republic of Korea
| | - Hyun Wook Jung
- Department of Chemical and Biological Engineering; Korea University; Seoul 136-713 Republic of Korea
| | - Seung Man Noh
- Department of Chemical and Biological Engineering; Korea University; Seoul 136-713 Republic of Korea
- PPG Industries Korea; Cheonan 330-912 Republic of Korea
| | - Jung Kwon Oh
- Department of Chemistry and Biochemistry and Center for Nanoscience Research (CENR); Concordia University; Montreal Quebec Canada H4B 1R6
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62
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Hao X, Liu X, Li W, Tan F, Chu Y, Zhao X, Lin L, Feng X. Chiral Lewis acid catalyzed asymmetric cycloadditions of disubstituted ketenes for the synthesis of β-lactones and δ-lactones. Org Lett 2013; 16:134-7. [PMID: 24303985 DOI: 10.1021/ol4031217] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Highly diastereo- and enantioselective [2 + 2]- and [4 + 2]-cycloadditions of disubstituted ketenes were realized by chiral Lewis acid catalysis. A series of arylalkylketenes underwent the reaction smoothly with isatins and β,γ-unsaturated α-ketoesters, providing optically active β-lactones and δ-lactones with vicinal chiral centers in excellent yields (up to 99%) and enantioselectivities (up to 99% ee), as well as exclusively high diastereoselectivities under 0.2-2 mol % catalyst loading.
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Affiliation(s)
- Xiaoyu Hao
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University , Chengdu 610064, P. R. China
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63
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Cheawchan S, Koyama Y, Uchida S, Takata T. Catalyst-free click cascade functionalization of unsaturated-bond-containing polymers using masked-ketene-tethering nitrile N-oxide. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.06.020] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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64
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Lin F, Zheng J, Yu J, Zhou J, Becker ML. Cascading “Triclick” Functionalization of Poly(caprolactone) Thin Films Quantified via a Quartz Crystal Microbalance. Biomacromolecules 2013; 14:2857-65. [DOI: 10.1021/bm400711q] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Fei Lin
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325, United
States
| | - Jukuan Zheng
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325, United
States
| | - Jiayi Yu
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325, United
States
| | - Jinjun Zhou
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325, United
States
| | - Matthew L. Becker
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325, United
States
- Center for Biomaterials
in Medicine, Austen Bioinnovation Institute in Akron, Akron, Ohio
44308, United States
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65
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Narrowly distributed homotelechelic polymers in 30 minutes: Using fast in situ
pre-functionalized ROMP initiators. ACTA ACUST UNITED AC 2013. [DOI: 10.1002/pola.26832] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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66
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Leibfarth FA, Hawker CJ. The emerging utility of ketenes in polymer chemistry. ACTA ACUST UNITED AC 2013. [DOI: 10.1002/pola.26797] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Frank A. Leibfarth
- Department of Materials; Chemistry and Biochemistry and Materials Research Laboratory, University of California; Santa Barbara California 93106
| | - Craig J. Hawker
- Department of Materials; Chemistry and Biochemistry and Materials Research Laboratory, University of California; Santa Barbara California 93106
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67
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Chung WJ, Griebel JJ, Kim ET, Yoon H, Simmonds AG, Ji HJ, Dirlam PT, Glass RS, Wie JJ, Nguyen NA, Guralnick BW, Park J, Somogyi A, Theato P, Mackay ME, Sung YE, Char K, Pyun J. The use of elemental sulfur as an alternative feedstock for polymeric materials. Nat Chem 2013; 5:518-24. [PMID: 23695634 DOI: 10.1038/nchem.1624] [Citation(s) in RCA: 534] [Impact Index Per Article: 48.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2012] [Accepted: 03/13/2013] [Indexed: 12/23/2022]
Abstract
An excess of elemental sulfur is generated annually from hydrodesulfurization in petroleum refining processes; however, it has a limited number of uses, of which one example is the production of sulfuric acid. Despite this excess, the development of synthetic and processing methods to convert elemental sulfur into useful chemical substances has not been investigated widely. Here we report a facile method (termed 'inverse vulcanization') to prepare chemically stable and processable polymeric materials through the direct copolymerization of elemental sulfur with vinylic monomers. This methodology enabled the modification of sulfur into processable copolymer forms with tunable thermomechanical properties, which leads to well-defined sulfur-rich micropatterned films created by imprint lithography. We also demonstrate that these copolymers exhibit comparable electrochemical properties to elemental sulfur and could serve as the active material in Li-S batteries, exhibiting high specific capacity (823 mA h g(-1) at 100 cycles) and enhanced capacity retention.
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Affiliation(s)
- Woo Jin Chung
- Department of Chemistry and Biochemistry, University of Arizona, 1306 East University Boulevard, Tucson, Arizona 85721, USA
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68
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Wasserberg D, Nicosia C, Tromp EE, Subramaniam V, Huskens J, Jonkheijm P. Oriented Protein Immobilization using Covalent and Noncovalent Chemistry on a Thiol-Reactive Self-Reporting Surface. J Am Chem Soc 2013; 135:3104-11. [DOI: 10.1021/ja3102133] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Dorothee Wasserberg
- Molecular Nanofabrication Group,
MESA+ Institute for Nanotechnology, Department of Science
and Technology, University of Twente, 7500
AE, Enschede, Netherlands
- Nanobiophysics Group, MESA+ Institute for Nanotechnology
and MIRA Institute for Biomedical
Technology and Technical Medicine, Department of Science and Technology, University of Twente, 7500 AE, Enschede, Netherlands
| | - Carlo Nicosia
- Molecular Nanofabrication Group,
MESA+ Institute for Nanotechnology, Department of Science
and Technology, University of Twente, 7500
AE, Enschede, Netherlands
| | - Eldrich E. Tromp
- Molecular Nanofabrication Group,
MESA+ Institute for Nanotechnology, Department of Science
and Technology, University of Twente, 7500
AE, Enschede, Netherlands
- Nanobiophysics Group, MESA+ Institute for Nanotechnology
and MIRA Institute for Biomedical
Technology and Technical Medicine, Department of Science and Technology, University of Twente, 7500 AE, Enschede, Netherlands
| | - Vinod Subramaniam
- Nanobiophysics Group, MESA+ Institute for Nanotechnology
and MIRA Institute for Biomedical
Technology and Technical Medicine, Department of Science and Technology, University of Twente, 7500 AE, Enschede, Netherlands
| | - Jurriaan Huskens
- Molecular Nanofabrication Group,
MESA+ Institute for Nanotechnology, Department of Science
and Technology, University of Twente, 7500
AE, Enschede, Netherlands
| | - Pascal Jonkheijm
- Molecular Nanofabrication Group,
MESA+ Institute for Nanotechnology, Department of Science
and Technology, University of Twente, 7500
AE, Enschede, Netherlands
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69
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Burke DJ, Kawauchi T, Kade MJ, Leibfarth FA, McDearmon B, Wolffs M, Kierstead PH, Moon B, Hawker CJ. Ketene-Based Route to rigid Cyclobutanediol Monomers for the Replacement of BPA in High Performance Polyesters. ACS Macro Lett 2012; 1:1228-1232. [PMID: 35607146 DOI: 10.1021/mz300497m] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Recently, polyesters based on the diol monomer 2,2,4,4-tetramethyl-1,3-cyclobutanediol (TMCBDO) have been shown to exhibit excellent thermal stability, mechanical properties, and optical clarity. In particular, the ability of TMCBDO to replace bisphenol A as a diol monomer in polycarbonates and polyesters has resulted in significant commercial and academic interest in these types of monomers. Herein, we report a versatile synthetic strategy based on the dimerization of ketenes derived from the thermal treatment of Meldrum's acid for the synthesis of structurally diverse cyclobutanediol (CBDO) monomers. This strategy allows a library of CBDO monomers amenable to standard polyester polymerization procedures to be prepared and the structural diversity of these CBDO monomers provides polymers with tunable physical properties, such as glass transition temperature ranging from 120 to 230 °C. The versatility and modularity of this Meldrum's acid-based approach to substituted cyclobutanediols, combined with the ease of synthesis, will be important for the further development of high-performance polyester materials that are not based on bisphenol A.
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Affiliation(s)
- Daniel J. Burke
- Materials
Research Laboratory, Materials Department and Department of Chemistry
and Biochemistry, University of California—Santa Barbara, Santa Barbara, California 93106, United States
| | - Takehiro Kawauchi
- Department of Materials
Science, Toyohashi University of Technology, Tempaku-cho, Toyohashi 441-8580, Japan
| | - Matthew J. Kade
- Materials
Research Laboratory, Materials Department and Department of Chemistry
and Biochemistry, University of California—Santa Barbara, Santa Barbara, California 93106, United States
| | - Frank A. Leibfarth
- Materials
Research Laboratory, Materials Department and Department of Chemistry
and Biochemistry, University of California—Santa Barbara, Santa Barbara, California 93106, United States
| | - Brenden McDearmon
- Materials
Research Laboratory, Materials Department and Department of Chemistry
and Biochemistry, University of California—Santa Barbara, Santa Barbara, California 93106, United States
| | - Martin Wolffs
- Materials
Research Laboratory, Materials Department and Department of Chemistry
and Biochemistry, University of California—Santa Barbara, Santa Barbara, California 93106, United States
| | - Paul H. Kierstead
- Materials
Research Laboratory, Materials Department and Department of Chemistry
and Biochemistry, University of California—Santa Barbara, Santa Barbara, California 93106, United States
| | - Bongjin Moon
- Department of Chemistry, Sogang University, Seoul 121-742, Korea
| | - Craig J. Hawker
- Materials
Research Laboratory, Materials Department and Department of Chemistry
and Biochemistry, University of California—Santa Barbara, Santa Barbara, California 93106, United States
- King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia 31261
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70
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Kim J, Kang EH, Choi TL. Cyclopolymerization To Synthesize Conjugated Polymers Containing Meldrum's Acid as a Precursor for Ketene Functionality. ACS Macro Lett 2012; 1:1090-1093. [PMID: 35607044 DOI: 10.1021/mz300250b] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Recently, the importance of Meldrum's acid has been reinvestigated because it serves as a great precursor for ketene generation by thermolysis. In this study, we synthesized conjugated polymers containing Meldrum's acid via controlled cyclopolymerization using a third-generation Grubbs catalyst. To avoid the solubility issue, copolymerization with soluble monomers was successfully used to provide various random and block copolymers containing Meldrum's acid in the conjugated backbone. Interestingly, when a polyacetylene derivative containing Meldrum's acid was incorporated into the second block of the diblock copolymers, highly stable core-shell supramolecules spontaneously formed during the polymerization via in situ nanoparticlization of conjugated polymer. This direct fabrication of nanostructures without requiring any post-treatments was due to the strong π-π interactions and the insolubility of the polyacetylene segment leading to the formation of core in situ. Moreover, thermolysis of Meldrum's acid to generate ketene in the conjugated polymer core was monitored by IR, and its consecutive cycloaddition to afford the cross-linked core improved the stability of the supramolecules.
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Affiliation(s)
- Jeongeun Kim
- Department
of Chemistry, Seoul National University, Seoul 151-747, Korea
| | - Eun-Hye Kang
- Department
of Chemistry, Seoul National University, Seoul 151-747, Korea
| | - Tae-Lim Choi
- Department
of Chemistry, Seoul National University, Seoul 151-747, Korea
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71
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Gody G, Rossner C, Moraes J, Vana P, Maschmeyer T, Perrier S. One-pot RAFT/"click" chemistry via isocyanates: efficient synthesis of α-end-functionalized polymers. J Am Chem Soc 2012; 134:12596-603. [PMID: 22731785 DOI: 10.1021/ja3030643] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
A new methodology has been developed for preparing α-functional polymers in a one-pot simultaneous polymerization/isocyanate "click" reaction. Our original synthetic strategy is based on the preparation of a carbonyl-azide chain transfer agent (CTA) precursor that undergoes the Curtius rearrangement in situ during reversible addition-fragmentation chain transfer (RAFT) polymerization yielding well-controlled α-isocyanate modified polymers. This strategy overcomes numerous difficulties associated with the synthesis of a polymerization mediator bearing an isocyanate at the R group and with the handling of such a reactive functionality. This new carbonyl-azide CTA can control the polymerization of a wide range of monomers, including (meth)acrylates, acrylamides, and styrenes (M(n) = 2-30 kDa; Đ = 1.16-1.38). We also show that this carbonyl-azide CTA can be used as a universal platform for the synthesis of α-end-functionalized polymers in a one-pot RAFT polymerization/isocyanate "click" procedure.
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Affiliation(s)
- Guillaume Gody
- Key Centre for Polymers & Colloids, School of Chemistry, The University of Sydney, New South Wales 2006, Sydney, Australia
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72
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Herndon JW. The chemistry of the carbon–transition metal double and triple bond: Annual survey covering the year 2010. Coord Chem Rev 2012. [DOI: 10.1016/j.ccr.2012.02.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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73
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Zhang M, Moore RB, Long TE. Melt transesterification and characterization of segmented block copolyesters containing 2,2,4,4-tetramethyl-1,3-cyclobutanediol. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.26176] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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74
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Stereo-controlled synthesis of polyolefins with cycloalkane groups by using late transition metals. Polym J 2012. [DOI: 10.1038/pj.2012.27] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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75
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Yilmaz G, Kumbaraci V, Talinli N, Tatar P, Demirel AL, Yagci Y. Photoinduced grafting of polystyrene onto silica particles by ketene chemistry. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.26033] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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76
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Kumbaraci V, Aydogan B, Talinli N, Yagci Y. Naphthodioxinone-1,3-benzodioxole as photochemically masked one-component type II photoinitiator for free radical polymerization. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.26034] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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77
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Yoo J, Kuruvilla DJ, D’Mello SR, Salem AK, Bowden NB. New class of biodegradable polymers formed from reactions of an inorganic functional group. Macromolecules 2012; 45:2292-2300. [PMID: 22454554 PMCID: PMC3311917 DOI: 10.1021/ma300190b] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Although numerous small molecules have been synthesized with sulfenamide bonds (R(2)N-SR), this is the first report of the synthesis of polysulfenamides. These polymers are readily synthesized at room temperature using secondary diamines and dithiosuccinimides. The dithiosuccinimides were readily synthesized in one step by the reaction of dithiols such as HS(CH(2))(6)SH with N-chlorosuccinimide. The resulting dithiosuccinimides were either recrystallized or readily purified by chromatography on silica gel and required no special handling. The conversions of polymerization ranged from 95 to 98%, and the molecular weights of the polymer reached as high as 6,300 g mol(-1). The sulfenamide bond was very stable in organic solvents, and no degradation was observed under atmospheric conditions in C(6)D(6) for 30 days. In contrast, the sulfenamide bond readily decomposed in less than 12 h in D(2)O. Polysulfenamides were fabricated into micron-sized particles loaded with dye and endocytosed into JAWSII immature dendritic and HEK293 cells. Polysulfenamides represent a new class of polymers that are readily synthesized, stable in aprotic solvents, and readily degrade in water.
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Affiliation(s)
- Jun Yoo
- Department of Chemistry, University of Iowa, Iowa City, IA 52242
| | | | | | | | - Ned B. Bowden
- Department of Chemistry, University of Iowa, Iowa City, IA 52242
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78
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Yoo J, D’Mello SR, Graf T, Salem AK, Bowden NB. Synthesis of the first poly(diaminosulfide)s and an investigation of their applications as drug delivery vehicles. Macromolecules 2012; 45:688-697. [PMID: 22347726 PMCID: PMC3280910 DOI: 10.1021/ma2023167] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
This paper reports the first examples of poly(diaminosulfide)s that were synthesized by the reaction of a sulfur transfer reagent and several secondary diamines. The diaminosulfide group has the general structure of R(2)N-S-NR(2) and, although it has been used in the synthesis of small molecules, it has never been utilized in the synthesis of macromolecules until this report. A series of poly(diaminosulfide)s were synthesized at elevated temperatures, and the molecular weights of the polymers were as high as 12,400 g mol(-1) with conversions for the polymerization reaction up to 99%. The rate constants for the transamination reactions that lead to the polymers were measured in several solvents to provide an understanding the reaction conditions necessary to polymerize the monomers. The degradation of diaminosulfides were studied in D(2)O, C(6)D(6), CD(3)OD, CDCl(3), and DMSO-d(6)/D(2)O to demonstrate that they were very stable in organic solvents but degraded within hours under aqueous conditions. These results clearly demonstrated that diaminosulfides are very stable in organic solvents under ambient conditions. Poly(diaminosulfide)s have sufficient stabilities to be useful for many applications. The ability of these polymers to function as drug delivery vehicles were studied by the fabrication of nanoparticles of a water-insoluble poly(diaminosulfide) with a dye. The microparticles were readily absorbed into human embryonic 293 cells and possessed no measureable toxicity towards these same cells.
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Affiliation(s)
- Jun Yoo
- Department of Chemistry, University of Iowa, Iowa City, IA 52242
| | | | - Tyler Graf
- Department of Chemistry, University of Iowa, Iowa City, IA 52242
| | | | - Ned B. Bowden
- Department of Chemistry, University of Iowa, Iowa City, IA 52242
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79
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Leibfarth FA, Wolffs M, Campos LM, Delany K, Treat N, Kade MJ, Moon B, Hawker CJ. Low-temperature ketene formation in materials chemistry through molecular engineering. Chem Sci 2012. [DOI: 10.1039/c2sc00841f] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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80
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Kempe K, Krieg A, Becer CR, Schubert US. “Clicking” on/with polymers: a rapidly expanding field for the straightforward preparation of novel macromolecular architectures. Chem Soc Rev 2012; 41:176-91. [DOI: 10.1039/c1cs15107j] [Citation(s) in RCA: 305] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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81
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Allen AD, Tidwell TT. New Directions in Ketene Chemistry: The Land of Opportunity. European J Org Chem 2011. [DOI: 10.1002/ejoc.201101230] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Annette D. Allen
- Department of Chemistry, University of Toronto, Toronto, Ontario, Canada, M5S 3H6, Fax: +1‐416978‐5325
| | - Thomas T. Tidwell
- Department of Chemistry, University of Toronto, Toronto, Ontario, Canada, M5S 3H6, Fax: +1‐416978‐5325
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82
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Spruell JM, Wolffs M, Leibfarth FA, Stahl BC, Heo J, Connal LA, Hu J, Hawker CJ. Reactive, Multifunctional Polymer Films through Thermal Cross-linking of Orthogonal Click Groups. J Am Chem Soc 2011; 133:16698-706. [DOI: 10.1021/ja207635f] [Citation(s) in RCA: 109] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Jason M. Spruell
- Materials Research Laboratory, California NanoSystems Institute, Department of Materials, and Department of Chemistry and Biochemistry, University of California, Santa Barbara, California, United States
| | - Martin Wolffs
- Materials Research Laboratory, California NanoSystems Institute, Department of Materials, and Department of Chemistry and Biochemistry, University of California, Santa Barbara, California, United States
| | - Frank A. Leibfarth
- Materials Research Laboratory, California NanoSystems Institute, Department of Materials, and Department of Chemistry and Biochemistry, University of California, Santa Barbara, California, United States
| | - Brian C. Stahl
- Materials Research Laboratory, California NanoSystems Institute, Department of Materials, and Department of Chemistry and Biochemistry, University of California, Santa Barbara, California, United States
| | - Jinhwa Heo
- Materials Research Laboratory, California NanoSystems Institute, Department of Materials, and Department of Chemistry and Biochemistry, University of California, Santa Barbara, California, United States
| | - Luke A. Connal
- Materials Research Laboratory, California NanoSystems Institute, Department of Materials, and Department of Chemistry and Biochemistry, University of California, Santa Barbara, California, United States
| | - Jerry Hu
- Materials Research Laboratory, California NanoSystems Institute, Department of Materials, and Department of Chemistry and Biochemistry, University of California, Santa Barbara, California, United States
| | - Craig J. Hawker
- Materials Research Laboratory, California NanoSystems Institute, Department of Materials, and Department of Chemistry and Biochemistry, University of California, Santa Barbara, California, United States
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83
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Miyamura Y, Park C, Kinbara K, Leibfarth FA, Hawker CJ, Aida T. Controlling Volume Shrinkage in Soft Lithography through Heat-Induced Cross-Linking of Patterned Nanofibers. J Am Chem Soc 2011; 133:2840-3. [DOI: 10.1021/ja110901h] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yasunao Miyamura
- Department of Chemistry and Biotechnology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Chiyoung Park
- ERATO-SORST Project, Japan Science and Technology Agency (JST), National Museum of Emerging Science and Innovation, 2-41 Aomi, Koto-ku, Tokyo 135-0064, Japan
| | - Kazushi Kinbara
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
| | - Frank A. Leibfarth
- Department of Materials, Department of Chemistry and Biochemistry, and Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
| | - Craig J. Hawker
- Department of Materials, Department of Chemistry and Biochemistry, and Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
| | - Takuzo Aida
- Department of Chemistry and Biotechnology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
- ERATO-SORST Project, Japan Science and Technology Agency (JST), National Museum of Emerging Science and Innovation, 2-41 Aomi, Koto-ku, Tokyo 135-0064, Japan
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84
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Hayashi S, Asano A, Koizumi T. Modification of pyridine-based conjugated polymer films via Lewis acid: halochromism, characterization and macroscopic gradation patterning. Polym Chem 2011. [DOI: 10.1039/c1py00363a] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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85
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Hayashi S, Inagi S, Fuchigami T. Efficient electrochemical polymer halogenation using a thin-layered cell. Polym Chem 2011. [DOI: 10.1039/c1py00150g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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86
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Wolffs M, Kade MJ, Hawker CJ. An energy efficient and facile synthesis of high molecular weight polyesters using ketenes. Chem Commun (Camb) 2011; 47:10572-4. [DOI: 10.1039/c1cc14055h] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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87
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Soeriyadi AH, Li GZ, Slavin S, Jones MW, Amos CM, Becer CR, Whittaker MR, Haddleton DM, Boyer C, Davis TP. Synthesis and modification of thermoresponsive poly(oligo(ethylene glycol) methacrylate) via catalytic chain transfer polymerization and thiol–ene Michael addition. Polym Chem 2011. [DOI: 10.1039/c0py00372g] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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88
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Leibfarth FA, Schneider Y, Lynd NA, Schultz A, Moon B, Kramer EJ, Bazan GC, Hawker CJ. Ketene Functionalized Polyethylene: Control of Cross-Link Density and Material Properties. J Am Chem Soc 2010; 132:14706-9. [DOI: 10.1021/ja1060643] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Frank A. Leibfarth
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, California 93106, Department of Materials, Mitsubsihi Chemical, Center for Advanced Materials and Materials Research Laboratory, University of California, Santa Barbara, California 93106, and Department of Chemistry, Sogang University, Seoul, 121-742, Korea
| | - Yanika Schneider
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, California 93106, Department of Materials, Mitsubsihi Chemical, Center for Advanced Materials and Materials Research Laboratory, University of California, Santa Barbara, California 93106, and Department of Chemistry, Sogang University, Seoul, 121-742, Korea
| | - Nathaniel A. Lynd
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, California 93106, Department of Materials, Mitsubsihi Chemical, Center for Advanced Materials and Materials Research Laboratory, University of California, Santa Barbara, California 93106, and Department of Chemistry, Sogang University, Seoul, 121-742, Korea
| | - Alison Schultz
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, California 93106, Department of Materials, Mitsubsihi Chemical, Center for Advanced Materials and Materials Research Laboratory, University of California, Santa Barbara, California 93106, and Department of Chemistry, Sogang University, Seoul, 121-742, Korea
| | - Bongjin Moon
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, California 93106, Department of Materials, Mitsubsihi Chemical, Center for Advanced Materials and Materials Research Laboratory, University of California, Santa Barbara, California 93106, and Department of Chemistry, Sogang University, Seoul, 121-742, Korea
| | - Edward J. Kramer
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, California 93106, Department of Materials, Mitsubsihi Chemical, Center for Advanced Materials and Materials Research Laboratory, University of California, Santa Barbara, California 93106, and Department of Chemistry, Sogang University, Seoul, 121-742, Korea
| | - Guillermo C. Bazan
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, California 93106, Department of Materials, Mitsubsihi Chemical, Center for Advanced Materials and Materials Research Laboratory, University of California, Santa Barbara, California 93106, and Department of Chemistry, Sogang University, Seoul, 121-742, Korea
| | - Craig J. Hawker
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, California 93106, Department of Materials, Mitsubsihi Chemical, Center for Advanced Materials and Materials Research Laboratory, University of California, Santa Barbara, California 93106, and Department of Chemistry, Sogang University, Seoul, 121-742, Korea
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89
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Griffiths JP, Maliha B, Moloney MG, Thompson AL, Hussain I. Surface functional polymers by post-polymerization modification using diarylcarbenes: introduction, release and regeneration of hydrogen peroxide and bactericidal activity. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:14142-14153. [PMID: 20672850 DOI: 10.1021/la1023482] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Functionalized diarylcarbenes are excellent reactive intermediates suitable for the direct surface modification of organic polymers, and these may be used to introduce urea and thiourea functions onto polystyrene at loading levels of up to 2.3 x 10(13) molecules/cm(2). These functions are capable of the reversible binding and release of peroxide at loading levels of up to 0.6 mmol/g and give polymers that display biocidal activity against a spectrum of gram-positive and gram-negative bacteria.
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Affiliation(s)
- Jon-Paul Griffiths
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, UK
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90
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Nulwala H, Burke DJ, Khan A, Serrano A, Hawker CJ. N-Vinyltriazoles: A New Functional Monomer Family through Click Chemistry. Macromolecules 2010. [DOI: 10.1021/ma100011x] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Hunaid Nulwala
- Materials Research Laboratosry, Materials Department, and Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106
| | - Daniel J. Burke
- Materials Research Laboratosry, Materials Department, and Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106
| | - Anzar Khan
- Department of Materials, Institute of Polymers, ETH-Zurich, Wolfgang-Pauli-Strasse 10, HCl H-520, 8093 Zurich, Switzerland
| | - Abigail Serrano
- Materials Research Laboratosry, Materials Department, and Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106
- Department of Inorganic Chemistry, Pontificia Universidad Catolica de Chile, Santiago, Chile
| | - Craig J. Hawker
- Materials Research Laboratosry, Materials Department, and Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106
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91
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Rimmer S. Facilitating functionality. Nat Chem 2010; 2:164-5. [DOI: 10.1038/nchem.563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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