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Kakuchi R, Fukasawa K, Chou LC, Kim H, Amii H. Fundamental insights into aminolysis postpolymerization modification reaction of polymers featuring α,α-Difluoroacetate Esters. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.124058] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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2
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Kakuchi R, Matsubara K, Fukasawa K, Amii H. Unveiling α-Etherification Effects on the Aminolysis of α,α-Difluoroacetate Enables the Aminolysis Post-polymerization Modification of α,α-Difluoro-α-(aryloxy)acetate-Containing Polymers. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01027] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ryohei Kakuchi
- Division of Molecular Science, Faculty of Science and Technology, Gunma University, 1-5-1 Tenjin, Kiryu, Gunma 376-8515, Japan
| | - Kiho Matsubara
- Division of Molecular Science, Faculty of Science and Technology, Gunma University, 1-5-1 Tenjin, Kiryu, Gunma 376-8515, Japan
| | - Kota Fukasawa
- Division of Molecular Science, Faculty of Science and Technology, Gunma University, 1-5-1 Tenjin, Kiryu, Gunma 376-8515, Japan
| | - Hideki Amii
- Division of Molecular Science, Faculty of Science and Technology, Gunma University, 1-5-1 Tenjin, Kiryu, Gunma 376-8515, Japan
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3
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Kakuchi R, Fukasawa K, Kikuchi M, Narumi A, Kawaguchi S, Li Y, Kim H, Amii H. Computer-Aided Design of Postpolymerization Modification Reaction Based on Aminolysis of α,α-Difluoroacetate Esters. Macromolecules 2021. [DOI: 10.1021/acs.macromol.0c02078] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ryohei Kakuchi
- Division of Molecular Science, Faculty of Science and Technology, Gunma University, 1-5-1 Tenjin, Kiryu, Gunma 376-8515, Japan
| | - Kota Fukasawa
- Division of Molecular Science, Faculty of Science and Technology, Gunma University, 1-5-1 Tenjin, Kiryu, Gunma 376-8515, Japan
| | - Moriya Kikuchi
- Faculty of Engineering, Yamagata University, Jonan 4-3-16, Yonezawa 992-8510, Japan
| | - Atsushi Narumi
- Department of Organic Materials Science, Graduate School of Organic Materials Science, Yamagata University, Jonan 4-3-16, Yonezawa 992-8510, Japan
| | - Seigou Kawaguchi
- Department of Organic Materials Science, Graduate School of Organic Materials Science, Yamagata University, Jonan 4-3-16, Yonezawa 992-8510, Japan
| | - Yao Li
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Hyung Kim
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Hideki Amii
- Division of Molecular Science, Faculty of Science and Technology, Gunma University, 1-5-1 Tenjin, Kiryu, Gunma 376-8515, Japan
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4
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Jiang S, Hsieh W, Chen W, Liao J, Chiang P, Lin YA. Synthesis of Thiol‐Containing Oligopeptides via Tandem Activation of γ‐Thiolactones by Silver‐DABCO Pair. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000310] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Sheng‐Yuan Jiang
- Department of Chemistry National Sun Yat-sen University Kaohsiung 804 Taiwan
| | - Wen‐Tsai Hsieh
- Department of Chemistry National Sun Yat-sen University Kaohsiung 804 Taiwan
| | - Wei‐Shuo Chen
- Department of Chemistry National Sun Yat-sen University Kaohsiung 804 Taiwan
| | - Jia‐Shiang Liao
- Department of Chemistry National Sun Yat-sen University Kaohsiung 804 Taiwan
| | - Po‐Yu Chiang
- Department of Chemistry National Sun Yat-sen University Kaohsiung 804 Taiwan
| | - Yuya A. Lin
- Department of Chemistry National Sun Yat-sen University Kaohsiung 804 Taiwan
- Department of Medicinal and Applied Chemistry Kaohsiung Medical University Kaohsiung 807 Taiwan
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5
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Cuétara-Guadarrama F, Hernández-Huerta E, Rojo-Portillo T, Reyes-López E, Jiménez-Barbero J, Cuevas G. Experimental and theoretical study of the role of CH/π interactions in the aminolysis reaction of acetyl galactoside. Carbohydr Res 2019; 486:107821. [PMID: 31580966 DOI: 10.1016/j.carres.2019.107821] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 09/02/2019] [Accepted: 09/18/2019] [Indexed: 11/16/2022]
Abstract
Molecular recognition of saccharides is a growing field, which has many implications in cancer therapy, drug discovery, and cellular communication among others. The participation of CH/π interactions in this event is well known. Nevertheless, the intrinsic role of CH/π for modulating chemical reactions is still far from being applicable. In this experimental and computational work we have evaluated the participation of CH/π interactions in the aminolysis reaction of acetyl galactoside promoted with different 6-substituted 2(1H)-pyridones. Two features have been incorporated to the promoter molecular structure, on one end the promoting pyridone group and on the other end the recognition moiety, joined together by an alkyne spacer. The small increment in the observed pseudo-first-order rate constant values (kobs) was related to the stability of the transition state provided by noncovalent interactions, including CH/π interactions. A longer alkyne spacer was necessary to improve the molecular recognition of the galactoside substrate. The trend of the calculated activation energy values (ΔERTS) was in good accordance with the experimental rate constant values.
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Affiliation(s)
- Fabián Cuétara-Guadarrama
- Departamento de Fisicoquímica, Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Ciudad Universitaria, Coyoacán, 04510, Mexico City, Mexico
| | - Eduardo Hernández-Huerta
- Departamento de Fisicoquímica, Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Ciudad Universitaria, Coyoacán, 04510, Mexico City, Mexico
| | - Tania Rojo-Portillo
- Departamento de Fisicoquímica, Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Ciudad Universitaria, Coyoacán, 04510, Mexico City, Mexico
| | - Elizabeth Reyes-López
- Departamento de Fisicoquímica, Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Ciudad Universitaria, Coyoacán, 04510, Mexico City, Mexico
| | - Jesús Jiménez-Barbero
- Centro de Investigaciones Biológicas (CIB-CSIC), 28040, Madrid, Spain; Center for Cooperative Research in Biosciences (CIC-bioGUNE), 48160, Derio-Bizkaia, Spain; Basque Foundation for Science, Ikerbasque, 48013, Bilbao, Spain
| | - Gabriel Cuevas
- Departamento de Fisicoquímica, Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Ciudad Universitaria, Coyoacán, 04510, Mexico City, Mexico.
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6
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Pellis A, Hanson PA, Comerford JW, Clark JH, Farmer TJ. Enzymatic synthesis of unsaturated polyesters: functionalization and reversibility of the aza-Michael addition of pendants. Polym Chem 2019. [DOI: 10.1039/c8py01655k] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Enzymatic synthesis of unsaturated polyesters and the temperature-dependent reversibility of the aza-Michael addition of diethyl amine pendants.
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Affiliation(s)
- Alessandro Pellis
- The University of York
- Department of Chemistry
- Green Chemistry Centre of Excellence
- Heslington
- UK
| | - Polly Ann Hanson
- The University of York
- Department of Chemistry
- Green Chemistry Centre of Excellence
- Heslington
- UK
| | - James W. Comerford
- The University of York
- Department of Chemistry
- Green Chemistry Centre of Excellence
- Heslington
- UK
| | - James H. Clark
- The University of York
- Department of Chemistry
- Green Chemistry Centre of Excellence
- Heslington
- UK
| | - Thomas J. Farmer
- The University of York
- Department of Chemistry
- Green Chemistry Centre of Excellence
- Heslington
- UK
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7
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Um IH, Song JH, Bae AR, Dust JM. Unexpected medium effect on the mechanism for aminolysis of aryl phenyl carbonates in acetonitrile and H2O: transition-state structure in the catalytic pathway. CAN J CHEM 2018. [DOI: 10.1139/cjc-2018-0204] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Upward curvature in the kinetic plots of pseudo first-order rate constants (kobsd) vs. [amine] for the aminolysis of aryl phenyl carbonates (5a–5j) in MeCN demonstrates that these reactions proceed via a zwitterionic tetrahedral intermediate (T±) that partitions between catalyzed and uncatalyzed routes to give the products. Yukawa–Tsuno plots for the reactions of 5a–5j with piperidine result in excellent linear correlations with ρY = 4.82 and r = 0.47 for the uncatalyzed reaction versus ρY = 2.21 and r = 0.21 for the catalyzed reaction. Brønsted plots for reactions of 4-(ethoxycarbonyl)-phenyl phenyl carbonate (5f) with a series of cyclic secondary amines exhibit excellent linear correlations with βnuc = 0.87 and 0.58 for the uncatalyzed and catalyzed reactions, respectively. The ΔH‡ and ΔS‡ values are 0.92 kcal/mol and –50.1 cal/mol K, respectively, for the catalyzed reaction of 5f with piperidine. Deuterium kinetic isotope effects found for reactions of 5f with piperidine/deuterated piperidine are 0.84 (uncatalyzed) and 1.42 (catalyzed). Multi-parameter analysis supports a concerted catalytic pathway involving a six-membered cyclic transition state rather than a traditionally accepted stepwise pathway with an anionic intermediate. The current unexpected results, where T± is the essential central intermediate in this aminolysis, contrast with previous calculation studies that deemed T± unstable in gas phase or MeCN.
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Affiliation(s)
- Ik-Hwan Um
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 120-750, Korea
| | - Ji-Hyun Song
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 120-750, Korea
| | - Ae-Ri Bae
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 120-750, Korea
| | - Julian M. Dust
- Departments of Chemistry and Environmental Science, Grenfell Campus – Memorial University of Newfoundland, Corner Brook, NL A2H 5G4, Canada
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Hua G, Odelius K. Exploiting Ring-Opening Aminolysis-Condensation as a Polymerization Pathway to Structurally Diverse Biobased Polyamides. Biomacromolecules 2018; 19:1573-1581. [PMID: 29584417 DOI: 10.1021/acs.biomac.8b00322] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A pathway to biobased polyamides (PAs) via ring-opening aminolysis-condensation (ROAC) under benign conditions with diverse structure was designed. Ethylene brassylate (EB), a plant oil-derived cyclic dilactone, was used in combination with an array of diamines of diverse chemical structure, and ring-opening of the cyclic dilactone EB was revealed as a driving force for the reaction. The ROAC reactions were adjusted, and reaction conditions of 100 °C under atmospheric pressure using 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) as a catalyst for 24 h were optimal. The structures of the polyamides were confirmed by mass spectroscopy, FTIR, and NMR, and the PAs had viscosity average molecular weights ( Mη) of ∼5-8 kDa. Glassy or semicrystalline PAs with glass transition temperatures between 48 and 55 °C, melting temperatures of 120-200 °C for the semicrystalline PAs, and thermal stabilities above 400 °C were obtained and were comparable to the existing PAs with similar structures. As a proof-of-concept of their usage, one of the PAs was shown to form fibers by electrospinning and films by melt pressing. Compared to conventional methods for PA synthesis, the ROAC route portrayed a reaction temperature at least 60-80 °C lower, could be readily carried out without a low-pressure environment, and eliminated the use of solvents and toxic chemicals. Together with the plant oil-derived monomer (EB), the ROAC route provided a sustainable alternative to design biobased PAs.
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Affiliation(s)
- Geng Hua
- Department of Fibre and Polymer Technology , KTH Royal Institute of Technology , SE-100 44 Stockholm , Sweden
| | - Karin Odelius
- Department of Fibre and Polymer Technology , KTH Royal Institute of Technology , SE-100 44 Stockholm , Sweden
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9
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How chain length dependencies interfere with the bulk RAFT polymerization rate and microstructural control. Chem Eng Sci 2018. [DOI: 10.1016/j.ces.2017.11.043] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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10
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11
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Desmet GB, Sabbe MK, D'hooge DR, Espeel P, Celasun S, Marin GB, Du Prez FE, Reyniers MF. Thiol-Michael addition in polar aprotic solvents: nucleophilic initiation or base catalysis? Polym Chem 2017. [DOI: 10.1039/c7py00005g] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The thiol-Michael addition of ethanethiol to ethyl acrylate, methyl vinylsulfone and maleimide initiated by ethyl-, diethyl-, triethylamine and triethylphosphine in tetrahydrofuran (THF) is investigated at room temperature.
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Affiliation(s)
| | | | - Dagmar. R. D'hooge
- Laboratory for Chemical Technology
- Ghent University
- Gent
- Belgium
- Department of Textiles
| | - Pieter Espeel
- Polymer Chemistry Research Group
- Ghent University
- B-9000 Gent
- Belgium
| | - Sensu Celasun
- Polymer Chemistry Research Group
- Ghent University
- B-9000 Gent
- Belgium
| | - Guy B. Marin
- Laboratory for Chemical Technology
- Ghent University
- Gent
- Belgium
| | - Filip E. Du Prez
- Polymer Chemistry Research Group
- Ghent University
- B-9000 Gent
- Belgium
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12
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Desmet GB, D'hooge DR, Omurtag PS, Espeel P, Marin GB, Du Prez FE, Reyniers MF. Quantitative First-Principles Kinetic Modeling of the Aza-Michael Addition to Acrylates in Polar Aprotic Solvents. J Org Chem 2016; 81:12291-12302. [PMID: 27978758 DOI: 10.1021/acs.joc.6b02218] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
This work presents a detailed computational study and kinetic analysis of the aza-Michael addition of primary and secondary amines to acrylates in an aprotic solvent. Accurate rate coefficients for all elementary steps in the various competing mechanisms are calculated using an ONIOM-based approach in which the full system is calculated with M06-2X/6-311+G(d,p) and the core system with CBS-QB3 corrected for solvation using COSMO-RS. Diffusional contributions are taken into account using the coupled encounter pair model with diffusion coefficients calculated based on molecular dynamics simulations. The calculated thermodynamic and kinetic parameters for all forward and reverse elementary reactions are fed to a microkinetic model giving excellent agreement with experimental data obtained using GC analysis. Rate analysis reveals that for primary and secondary amines, the aza-Michael addition to ethyl acrylate occurs preferentially according to a 1,2-addition mechanism, consisting of the pseudoequilibrated formation of a zwitterion followed by a rate controlling amine assisted proton transfer toward the singly substituted product. The alternative 1,4-addition becomes competitive if substituents are present on the amine or double bond of the acrylate. Primary amines react faster than secondary amines due to increased solvation of the zwitterionic intermediate and less sterically hindered proton transfer.
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Affiliation(s)
- Gilles B Desmet
- Laboratory for Chemical Technology, Ghent University , Technologiepark 914, B-9052 Gent, Belgium
| | - Dagmar R D'hooge
- Laboratory for Chemical Technology, Ghent University , Technologiepark 914, B-9052 Gent, Belgium.,Department of Textiles, Ghent University , Technologiepark 907, B-9052 Gent, Belgium
| | - Pinar Sinem Omurtag
- Polymer Chemistry Research Group, Ghent University , Krijgslaan 281 S4-bis, B-9000 Gent, Belgium
| | - Pieter Espeel
- Polymer Chemistry Research Group, Ghent University , Krijgslaan 281 S4-bis, B-9000 Gent, Belgium
| | - Guy B Marin
- Laboratory for Chemical Technology, Ghent University , Technologiepark 914, B-9052 Gent, Belgium
| | - Filip E Du Prez
- Polymer Chemistry Research Group, Ghent University , Krijgslaan 281 S4-bis, B-9000 Gent, Belgium
| | - Marie-Françoise Reyniers
- Laboratory for Chemical Technology, Ghent University , Technologiepark 914, B-9052 Gent, Belgium
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13
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Desmet GB, D'hooge DR, Sabbe MK, Reyniers MF, Marin GB. Computational Investigation of the Aminolysis of RAFT Macromolecules. J Org Chem 2016; 81:11626-11634. [PMID: 27809531 DOI: 10.1021/acs.joc.6b01844] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This work presents a detailed computational study and kinetic analysis of the aminolysis of dithioates, dithiobenzoates, trithiocarbonates, xanthates, and thiocarbamates, which are frequently used as chain-transfer agents for reversible addition-fragmentation chain-transfer (RAFT) polymerization. Rate coefficients were obtained from ab initio calculations, taking into account a diffusional contribution according to the encounter pair model. A kinetic model was constructed and reveals a reaction mechanism of four elementary steps: (i) formation of a zwitterionic intermediate, (ii) formation of a complex intermediate in which an assisting amine molecule takes over the proton from the zwitterionic intermediate, (iii) breakdown of the complex into a neutral tetrahedral intermediate with release of the assisting amine molecule, and (iv) amine-assisted breakdown of the neutral intermediate to the products. Furthermore, a comparative analysis indicates that the alkanedithioates and dithiobenzoates react the fastest, followed, respectively, by xanthates and trithiocarbonates, which react almost equally fast, and dithiocarbamates, which are not reactive at typical experimentally used conditions.
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Affiliation(s)
- Gilles B Desmet
- Laboratory for Chemical Technology and ‡Department of Textiles, Ghent University , Technologiepark 914, 9052 Gent, Belgium
| | - Dagmar R D'hooge
- Laboratory for Chemical Technology and ‡Department of Textiles, Ghent University , Technologiepark 914, 9052 Gent, Belgium
| | - Maarten K Sabbe
- Laboratory for Chemical Technology and ‡Department of Textiles, Ghent University , Technologiepark 914, 9052 Gent, Belgium
| | - Marie-Françoise Reyniers
- Laboratory for Chemical Technology and ‡Department of Textiles, Ghent University , Technologiepark 914, 9052 Gent, Belgium
| | - Guy B Marin
- Laboratory for Chemical Technology and ‡Department of Textiles, Ghent University , Technologiepark 914, 9052 Gent, Belgium
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14
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Synthesis of thiolactone building blocks as potential precursors for sustainable functional materials. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.08.076] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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15
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Fitzpatrick D, Battilocchio C, Ley SV. Enabling Technologies for the Future of Chemical Synthesis. ACS CENTRAL SCIENCE 2016; 2:131-8. [PMID: 27163040 PMCID: PMC4827522 DOI: 10.1021/acscentsci.6b00015] [Citation(s) in RCA: 96] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Indexed: 05/07/2023]
Abstract
Technology is evolving at breakneck pace, changing the way we communicate, travel, find out information, and live our lives. Yet chemistry as a science has been slower to adapt to this rapidly shifting world. In this Outlook we use highlights from recent literature reports to describe how progresses in enabling technologies are altering this trend, permitting chemists to incorporate new advances into their work at all levels of the chemistry development cycle. We discuss the benefits and challenges that have arisen, impacts on academic-industry relationships, and future trends in the area of chemical synthesis.
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16
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D'hooge DR, Van Steenberge PHM, Derboven P, Reyniers MF, Marin GB. Model-based design of the polymer microstructure: bridging the gap between polymer chemistry and engineering. Polym Chem 2015. [DOI: 10.1039/c5py01069a] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A state-of-the-art review is presented on model-based design for next-generation polymer synthesis and modification.
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Affiliation(s)
- Dagmar R. D'hooge
- Laboratory for Chemical Technology (LCT)
- Ghent University
- B-9052 Zwijnaarde (Gent)
- Belgium
- Department of Textiles
| | | | - Pieter Derboven
- Laboratory for Chemical Technology (LCT)
- Ghent University
- B-9052 Zwijnaarde (Gent)
- Belgium
| | | | - Guy B. Marin
- Laboratory for Chemical Technology (LCT)
- Ghent University
- B-9052 Zwijnaarde (Gent)
- Belgium
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