1
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Akintayo DC, Munzeiwa WA, Jonnalagadda SB, Omondi B. Ring-opening polymerization of cyclic esters by 3- and 4-pyridinyl Schiff base Zn(II) and Cu(II) paddlewheel complexes: kinetic, mechanistic and tacticity studies. ARAB J CHEM 2021. [DOI: 10.1016/j.arabjc.2021.103313] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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2
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Jitonnom J, Meelua W. DFT study of lactide ring-opening polymerizations by aluminium trialkoxides: Understanding the effects of monomer, alkoxide substituent, solvent and metal. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2020.137482] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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3
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Liu Y, Zhu N, Hu X, Huang W, Wu J, Bin X, Qiu J, Duan J, Fang Z, Guo K. Continuous flow rare earth phenolates catalyzed chemoselective ring-opening polymerization. Chem Eng Sci 2020. [DOI: 10.1016/j.ces.2019.115290] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Nifant’ev I, Ivchenko P. Coordination Ring-Opening Polymerization of Cyclic Esters: A Critical Overview of DFT Modeling and Visualization of the Reaction Mechanisms. Molecules 2019; 24:E4117. [PMID: 31739538 PMCID: PMC6891794 DOI: 10.3390/molecules24224117] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 11/09/2019] [Accepted: 11/12/2019] [Indexed: 01/29/2023] Open
Abstract
Ring-opening polymerization (ROP) of cyclic esters (lactones, lactides, cyclic carbonates and phosphates) is an effective tool to synthesize biocompatible and biodegradable polymers. Metal complexes effectively catalyze ROP, a remarkable diversity of the ROP mechanisms prompted the use of density functional theory (DFT) methods for simulation and visualization of the ROP pathways. Optimization of the molecular structures of the key reaction intermediates and transition states has allowed to explain the values of catalytic activities and stereocontrol events. DFT computation data sets might be viewed as a sound basis for the design of novel ROP catalysts and cyclic substrates, for the creation of new types of homo- and copolymers with promising properties. In this review, we summarized the results of DFT modeling of coordination ROP of cyclic esters. The importance to understand the difference between initiation and propagation stages, to consider the possibility of polymer-catalyst coordination, to figure out the key transition states, and other aspects of DFT simulation and visualization of ROP have been also discussed in our review.
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Affiliation(s)
- Ilya Nifant’ev
- Chemistry Department, M.V. Lomonosov Moscow State University, 1 Leninskie Gory Str., Building 3, 119991 Moscow, Russia
- A.V. Topchiev Institute of Petrochemical Synthesis RAS, 29 Leninsky Pr., 119991 Moscow, Russia
| | - Pavel Ivchenko
- Chemistry Department, M.V. Lomonosov Moscow State University, 1 Leninskie Gory Str., Building 3, 119991 Moscow, Russia
- A.V. Topchiev Institute of Petrochemical Synthesis RAS, 29 Leninsky Pr., 119991 Moscow, Russia
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5
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Affiliation(s)
- F. Ruipérez
- POLYMAT, University of the Basque Country UPV/EHU, Donostia-San Sebastián, Spain
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6
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Nifant'ev I, Shlyakhtin A, Kosarev M, Gavrilov D, Karchevsky S, Ivchenko P. DFT Visualization and Experimental Evidence of BHT-Mg-Catalyzed Copolymerization of Lactides, Lactones and Ethylene Phosphates. Polymers (Basel) 2019; 11:E1641. [PMID: 31658688 PMCID: PMC6836241 DOI: 10.3390/polym11101641] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 10/05/2019] [Accepted: 10/08/2019] [Indexed: 12/02/2022] Open
Abstract
Catalytic ring-opening polymerization (ROP) of cyclic esters (lactides, lactones) and cyclic ethylene phosphates is an effective way to process materials with regulated hydrophilicity and controlled biodegradability. Random copolymers of cyclic monomers of different chemical nature are highly attractive due to their high variability of characteristics. Aryloxy-alkoxy complexes of non-toxic metals such as derivatives of 2,6-di-tert-butyl-4-methylphenoxy magnesium (BHT-Mg) complexes are effective coordination catalysts for homopolymerization of all types of traditional ROP monomers. In the present paper, we report the results of density functional theory (DFT) modeling of BHT-Mg-catalyzed copolymerization for lactone/lactide, lactone/ethylene phosphate and lactide/ethylene phosphate mixtures. ε-Caprolactone (ε-CL), l-lactide (l-LA) and methyl ethylene phosphate (MeOEP) were used as examples of monomers in DFT simulations by the Gaussian-09 program package with the B3PW91/DGTZVP basis set. Both binuclear and mononuclear reaction mechanistic concepts have been applied for the calculations of the reaction profiles. The results of calculations predict the possibility of the formation of random copolymers based on l-LA/MeOEP, and substantial hindrance of copolymerization for ε-CL/l-LA and ε-CL/MeOEP pairs. From the mechanistic point of view, the formation of highly stable five-membered chelate by the products of l-LA ring-opening and high donor properties of phosphates are the key factors that rule the reactions. The results of DFT modeling have been confirmed by copolymerization experiments.
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Affiliation(s)
- Ilya Nifant'ev
- Chemistry Department, M.V. Lomonosov Moscow State University, 1-3 Leninskie Gory, 119991 Moscow, Russia.
- A.V. Topchiev Institute of Petrochemical Synthesis RAS, 29 Leninsky Pr., 119991 Moscow, Russia.
| | - Andrey Shlyakhtin
- Chemistry Department, M.V. Lomonosov Moscow State University, 1-3 Leninskie Gory, 119991 Moscow, Russia.
| | - Maxim Kosarev
- Chemistry Department, M.V. Lomonosov Moscow State University, 1-3 Leninskie Gory, 119991 Moscow, Russia.
| | - Dmitry Gavrilov
- Chemistry Department, M.V. Lomonosov Moscow State University, 1-3 Leninskie Gory, 119991 Moscow, Russia.
| | - Stanislav Karchevsky
- Joint-stock company "Institute of petroleum refining and petrochemistry", 12 Iniciativnaya Str., 450065 Ufa, Republic of Bashkortostan, Russia.
| | - Pavel Ivchenko
- Chemistry Department, M.V. Lomonosov Moscow State University, 1-3 Leninskie Gory, 119991 Moscow, Russia.
- A.V. Topchiev Institute of Petrochemical Synthesis RAS, 29 Leninsky Pr., 119991 Moscow, Russia.
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7
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Bai TW, Ni XF, Ling J, Shen ZQ. Mechanism of Janus Polymerization: A DFT Study. CHINESE JOURNAL OF POLYMER SCIENCE 2019. [DOI: 10.1007/s10118-019-2318-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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8
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Munzeiwa WA, Nyamori VO, Omondi B. N,O-Amino-phenolate Mg(II) and Zn(II) Schiff base complexes: Synthesis and application in ring-opening polymerization of ε-caprolactone and lactides. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2018.12.028] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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9
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Gümüştaş S, Balcan M, Kınal A. Computational determination of ring opening polymerization reaction mechanism of α-angelica lactone. COMPUT THEOR CHEM 2018. [DOI: 10.1016/j.comptc.2018.08.022] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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10
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Birke A, Ling J, Barz M. Polysarcosine-containing copolymers: Synthesis, characterization, self-assembly, and applications. Prog Polym Sci 2018. [DOI: 10.1016/j.progpolymsci.2018.01.002] [Citation(s) in RCA: 115] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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11
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Hua J, Lv Q, Wang Z, Liu K, Ling J. Ring-opening polymerization of l-lactide catalyzed by a novel molybdenum-based catalytic system. IRANIAN POLYMER JOURNAL 2018. [DOI: 10.1007/s13726-018-0612-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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12
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Ortuño MA, Dereli B, Chiaie KRD, Biernesser AB, Qi M, Byers JA, Cramer CJ. The Role of Alkoxide Initiator, Spin State, and Oxidation State in Ring-Opening Polymerization of ε-Caprolactone Catalyzed by Iron Bis(imino)pyridine Complexes. Inorg Chem 2018; 57:2064-2071. [PMID: 29381341 DOI: 10.1021/acs.inorgchem.7b02964] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Density functional theory (DFT) is employed to characterize in detail the mechanism for the ring-opening polymerization (ROP) of ε-caprolactone catalyzed by iron alkoxide complexes bearing redox-active bis(imino)pyridine ligands. The combination of iron with the non-innocent bis(imino)pyridine ligand permits comparison of catalytic activity as a function of oxidation state (and overall spin state). The reactivities of aryl oxide versus alkoxide initiators for the ROP of ε-caprolactone are also examined. An experimental test of a computational prediction reveals an Fe(III) bis(imino)pyridine bis-neopentoxide complex to be competent for ROP of ε-caprolactone.
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Affiliation(s)
- Manuel A Ortuño
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota , 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Büsra Dereli
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota , 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Kayla R Delle Chiaie
- Eugene F. Merkert Chemistry Center, Department of Chemistry, Boston College , 2609 Beacon Street, Chestnut Hill, Massachusetts 02467, United States
| | - Ashley B Biernesser
- Eugene F. Merkert Chemistry Center, Department of Chemistry, Boston College , 2609 Beacon Street, Chestnut Hill, Massachusetts 02467, United States
| | - Miao Qi
- Eugene F. Merkert Chemistry Center, Department of Chemistry, Boston College , 2609 Beacon Street, Chestnut Hill, Massachusetts 02467, United States
| | - Jeffery A Byers
- Eugene F. Merkert Chemistry Center, Department of Chemistry, Boston College , 2609 Beacon Street, Chestnut Hill, Massachusetts 02467, United States
| | - Christopher J Cramer
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota , 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
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13
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Munzeiwa WA, Omondi B, Nyamori VO. Synthesis and polymerization kinetics of ε-caprolactone and ʟ-lactide to low molecular weight polyesters catalyzed by Zn(II) and Cu(II) N -hydroxy- N , N ′-diarylformamidine complexes. Polyhedron 2017. [DOI: 10.1016/j.poly.2017.09.029] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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14
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Chandanabodhi D, Nanok T. A DFT study of the ring-opening polymerization mechanism of l-lactide and ε-caprolactone using aluminium salen-type initiators: Towards an understanding of their reactivities in homo- and copolymerization. MOLECULAR CATALYSIS 2017. [DOI: 10.1016/j.mcat.2017.04.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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15
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Nifant’ev IE, Ivchenko PV, Shlyakhtin AV, Ivanyuk AV. Polymerization of trimethylene carbonate and lactones in the presence of magnesium monoionolate: A comparative theoretical and experimental study. POLYMER SCIENCE SERIES B 2017. [DOI: 10.1134/s1560090417020075] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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16
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Jędrzkiewicz D, Adamus G, Kwiecień M, John Ł, Ejfler J. Lactide as the Playmaker of the ROP Game: Theoretical and Experimental Investigation of Ring-Opening Polymerization of Lactide Initiated by Aminonaphtholate Zinc Complexes. Inorg Chem 2017; 56:1349-1365. [DOI: 10.1021/acs.inorgchem.6b02439] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Dawid Jędrzkiewicz
- Faculty of Chemistry, University of Wroclaw, Fryderyka Joliot-Curie 14, 50-383 Wroclaw, Poland
| | - Grażyna Adamus
- Centre of Polymer and Carbon Materials Polish Academy of Science, Marii Curie-Skłodowskiej 34, 41-819 Zabrze, Poland
| | - Michał Kwiecień
- Centre of Polymer and Carbon Materials Polish Academy of Science, Marii Curie-Skłodowskiej 34, 41-819 Zabrze, Poland
| | - Łukasz John
- Faculty of Chemistry, University of Wroclaw, Fryderyka Joliot-Curie 14, 50-383 Wroclaw, Poland
| | - Jolanta Ejfler
- Faculty of Chemistry, University of Wroclaw, Fryderyka Joliot-Curie 14, 50-383 Wroclaw, Poland
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17
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Liu Y, Huang W, Zhu N, Guo K. Direct synthesis of thiol-terminated poly(ε-caprolactone): a study on polymerization kinetics, mechanism and rare earth phenolates' structure–activity relationship. RSC Adv 2017. [DOI: 10.1039/c7ra06781j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Polymerization kinetics, mechanism and rare earth phenolates' structure–activity relationship were investigated for direct synthesis of thiol-terminated poly(ε-caprolactone).
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Affiliation(s)
- Yihuan Liu
- College of Biotechnology and Pharmaceutical Engineering
- State Key Laboratory of Materials-Oriented Chemical Engineering
- Nanjing Tech University
- Nanjing 211800
- China
| | - Weijun Huang
- College of Biotechnology and Pharmaceutical Engineering
- State Key Laboratory of Materials-Oriented Chemical Engineering
- Nanjing Tech University
- Nanjing 211800
- China
| | - Ning Zhu
- College of Biotechnology and Pharmaceutical Engineering
- State Key Laboratory of Materials-Oriented Chemical Engineering
- Nanjing Tech University
- Nanjing 211800
- China
| | - Kai Guo
- College of Biotechnology and Pharmaceutical Engineering
- State Key Laboratory of Materials-Oriented Chemical Engineering
- Nanjing Tech University
- Nanjing 211800
- China
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18
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Theoretical studies on aluminum trialkoxide-initiated lactone ring-opening polymerizations: Roles of alkoxide substituent and monomer ring structure. COMPUT THEOR CHEM 2016. [DOI: 10.1016/j.comptc.2016.10.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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19
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Theoretical study of efficiency comparison of Ti (IV) alkoxides as initiators for ring-opening polymerization of ε-caprolactone. COMPUT THEOR CHEM 2016. [DOI: 10.1016/j.comptc.2016.05.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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20
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Qi SC, Hayashi JI, Zhang L. Recent application of calculations of metal complexes based on density functional theory. RSC Adv 2016. [DOI: 10.1039/c6ra16168e] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Recent application of density functional theory (DFT) for metal complexes is reviewed to show the achievements of DFT and the challenges for it, as well as the methods for selecting proper functionals.
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Affiliation(s)
- Shi-Chao Qi
- Institute for Materials Chemistry and Engineering
- Kyushu University
- Kasuga
- Japan
| | - Jun-ichiro Hayashi
- Institute for Materials Chemistry and Engineering
- Kyushu University
- Kasuga
- Japan
| | - Lu Zhang
- Institute for Materials Chemistry and Engineering
- Kyushu University
- Kasuga
- Japan
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21
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Zinc complexes coordinated by bipyridine-phenolate ligands as an efficient initiator for ring-opening polymerization of cyclic esters. POLYMER 2015. [DOI: 10.1016/j.polymer.2014.12.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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22
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Zhang M, Ni X, Shen Z. Synthesis of Bimetallic Bis(phenolate) N-Heterocyclic Carbene Lanthanide Complexes and Their Applications in the Ring-Opening Polymerization of l-Lactide. Organometallics 2014. [DOI: 10.1021/om500930m] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Min Zhang
- MOE Key Laboratory of Macromolecular
Synthesis and Functionalization, Department of Polymer Science and
Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China
| | - Xufeng Ni
- MOE Key Laboratory of Macromolecular
Synthesis and Functionalization, Department of Polymer Science and
Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China
| | - Zhiquan Shen
- MOE Key Laboratory of Macromolecular
Synthesis and Functionalization, Department of Polymer Science and
Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China
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23
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Effects of alkoxide alteration on the ring-opening polymerization of ε-caprolactone initiated by n-Bu3SnOR: a DFT study. Struct Chem 2014. [DOI: 10.1007/s11224-014-0527-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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24
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Sattayanon C, Sontising W, Jitonnom J, Meepowpan P, Punyodom W, Kungwan N. Theoretical study on the mechanism and kinetics of ring-opening polymerization of cyclic esters initiated by tin(II) n-butoxide. COMPUT THEOR CHEM 2014. [DOI: 10.1016/j.comptc.2014.06.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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25
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A novel approach to RE–OR bond from in situ reaction of rare earth triflates and sodium alkoxides: A versatile catalyst for living ring-opening polymerization of ε-caprolactone. POLYMER 2014. [DOI: 10.1016/j.polymer.2014.03.032] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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Affiliation(s)
- Lixin You
- MOE Key Laboratory of Macromolecular
Synthesis and Functionalization, Department of Polymer Science and
Engineering, Zhejiang University, Hangzhou 310027, China
| | - Jun Ling
- MOE Key Laboratory of Macromolecular
Synthesis and Functionalization, Department of Polymer Science and
Engineering, Zhejiang University, Hangzhou 310027, China
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27
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Contreras JM, Medina D, López-Carrasquero F, Contreras RR. Ring-opening polymerization of ε-caprolactone initiated by samarium acetate. JOURNAL OF POLYMER RESEARCH 2013. [DOI: 10.1007/s10965-013-0244-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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28
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Sattayanon C, Kungwan N, Punyodom W, Meepowpan P, Jungsuttiwong S. Theoretical investigation on the mechanism and kinetics of the ring-opening polymerization of ε-caprolactone initiated by tin(II) alkoxides. J Mol Model 2013; 19:5377-85. [PMID: 24173613 DOI: 10.1007/s00894-013-2026-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2012] [Accepted: 09/30/2013] [Indexed: 11/26/2022]
Affiliation(s)
- Chanchai Sattayanon
- Center of Excellence for Innovation in Chemistry, Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, Thailand, 50200
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Lawan N, Muangpil S, Kungwan N, Meepowpan P, Lee VS, Punyodom W. Tin (IV) alkoxide initiator design for poly (d-lactide) synthesis using DFT calculations. COMPUT THEOR CHEM 2013. [DOI: 10.1016/j.comptc.2013.07.045] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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30
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Li X, Zhu Y, Ling J, Shen Z. Direct Cyclodextrin-Mediated Ring Opening Polymerization of ϵ-Caprolactone in the Presence of Yttrium Trisphenolate Catalyst. Macromol Rapid Commun 2012; 33:1008-13. [DOI: 10.1002/marc.201100848] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2011] [Revised: 01/29/2012] [Indexed: 11/10/2022]
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31
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D'Auria I, Lamberti M, Mazzeo M, Milione S, Roviello G, Pellecchia C. Coordination chemistry and reactivity of zinc complexes supported by a phosphido pincer ligand. Chemistry 2012; 18:2349-60. [PMID: 22267007 DOI: 10.1002/chem.201102414] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2011] [Indexed: 11/09/2022]
Abstract
The preparation and characterization of new Zn(II) complexes of the type [(PPP)ZnR] in which R = Et (1) or N(SiMe(3))(2) (2) and PPP is a tridentate monoanionic phosphido ligand (PPP-H = bis(2-diphenylphosphinophenyl)phosphine) are reported. Reaction of ZnEt(2) and Zn[N(SiMe(3))(2)](2) with one equivalent of proligand PPP-H produced the corresponding tetrahedral zinc ethyl (1) and zinc amido (2) complexes in high yield. Homoleptic (PPP)(2) Zn complex 3 was obtained by reaction of the precursors with two equivalents of the proligand. Structural characterization of 1-3 was achieved by multinuclear NMR spectroscopy ((1)H, (13)C, and (31)P) and X-ray crystallography (3). Variable-temperature (1)H and (31)P NMR studies highlighted marked flexibility of the phosphido pincer ligand in coordination at the metal center. A DFT calculation on the compounds provided theoretical support for this behavior. The activities of 1 and 2 toward the ring-opening polymerization of ε-caprolactone and of L- and rac-lactide were investigated, also in combination with an alcohol as external chain-transfer agent. Polyesters with controlled molecular parameters (M(n), end groups) and low polydispersities were obtained. A DFT study on ring-opening polymerization promoted by these complexes highlighted the importance of the coordinative flexibility of the ancillary ligand to promote monomer coordination at the reactive zinc center. Preliminary investigations showed the ability of these complexes to promote copolymerization of L-lactide and ε-caprolactone to achieve random copolymers whose microstructure reproduces the composition of the monomer feed.
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Affiliation(s)
- Ilaria D'Auria
- Department of Chemistry and Biology, University of Salerno via Ponte don Melillo, 84084 Fisciano, Salerno, Italy
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32
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Kang X, Song Y, Luo Y, Li G, Hou Z, Qu J. Computational Studies on Isospecific Polymerization of 1-Hexene Catalyzed by Cationic Rare Earth Metal Alkyl Complex Bearing a C3iPr-trisox Ligand. Macromolecules 2012. [DOI: 10.1021/ma202414k] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xiaohui Kang
- State Key Laboratory of Fine Chemicals, School
of Pharmaceutical Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Yuming Song
- State Key Laboratory of Fine Chemicals, School
of Pharmaceutical Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Yi Luo
- State Key Laboratory of Fine Chemicals, School
of Pharmaceutical Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Gang Li
- School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Zhaomin Hou
- State Key Laboratory of Fine Chemicals, School
of Pharmaceutical Science and Technology, Dalian University of Technology, Dalian 116024, China
- Organometallic Chemistry Laboratory, RIKEN Advanced Science Institute, 2-1 Hirosawa, Wako,
Saitama 351-0198, Japan
| | - Jingping Qu
- State Key Laboratory of Fine Chemicals, School
of Pharmaceutical Science and Technology, Dalian University of Technology, Dalian 116024, China
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33
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Peng H, Ling J, Shen Z. Ring opening polymerization of α-amino acid N-carboxyanhydrides catalyzed by rare earth catalysts: Polymerization characteristics and mechanism. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/pola.25848] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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34
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Ni X, Liang Z, Ling J, Li X, Shen Z. Controlled ring-opening polymerization of ε-caprolactone initiated by in situ
formed yttrium trisalicylaldimine complexes, and their study by density functional theory. POLYM INT 2011. [DOI: 10.1002/pi.3145] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Polymerization of ɛ-caprolactone using ruthenium(II) mixed metallocene catalysts and isopropyl alcohol: Living character and mechanistic study. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.molcata.2011.06.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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CONTROLLED RELEASE OF SALICYLIC ACID FROM ELECTROSPUN MATS OF POLY( ε-CAPROLACTONE) WITH LOW CRYSTALLINITY. ACTA POLYM SIN 2011. [DOI: 10.3724/sp.j.1105.2011.11020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Ling J, Liu J, Shen Z, Hogen-Esch TE. Ring-opening polymerization of ε-caprolactone catalyzed by Yttrium trisphenolate in the presence of 1,2-propanediol. Do both primary and secondary hydroxyl groups initiate polymerization? ACTA ACUST UNITED AC 2011. [DOI: 10.1002/pola.24637] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Susperregui N, Kramer MU, Okuda J, Maron L. Theoretical Study on the Ring-Opening Polymerization of ε-Caprolactone by [YMeX(THF)5]+ with X = BH4, NMe2. Organometallics 2011. [DOI: 10.1021/om100606p] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nicolas Susperregui
- Université de Toulouse and CNRS, INSA, UPS, UMR 5215 LPCNO, 135 avenue de Rangueil, F-31077 Toulouse, France
| | - Mathias U. Kramer
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, D-52056 Aachen, Germany
| | - Jun Okuda
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, D-52056 Aachen, Germany
| | - Laurent Maron
- Université de Toulouse and CNRS, INSA, UPS, UMR 5215 LPCNO, 135 avenue de Rangueil, F-31077 Toulouse, France
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Zhu N, Ling J, Zhu Y, Sun W, Shen Z. Novel direct synthetic approach to thiol-functionalized poly(ε-caprolactone) by highly chemselective and low costly rare earth phenolate catalysts. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/pola.24233] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Ling J, Dai Y, Zhu Y, Sun W, Shen Z. Ring-opening polymerization of 1-methyltrimethylene carbonate by rare earth initiators. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/pola.24166] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Ling J, Huang Y. Understanding the Ring-Opening Reaction of α-Amino Acid N-Carboxyanhydride in an Amine-Mediated Living Polymerization: A DFT Study. MACROMOL CHEM PHYS 2010. [DOI: 10.1002/macp.201000115] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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