1
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Xu J, Zhang P, Yuan Y, Hadjichristidis N. Elucidation of the Alternating Copolymerization Mechanism of Epoxides or Aziridines with Cyclic Anhydrides in the Presence of Halide Salts. Angew Chem Int Ed Engl 2023; 62:e202218891. [PMID: 36734167 DOI: 10.1002/anie.202218891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 01/27/2023] [Accepted: 02/01/2023] [Indexed: 02/04/2023]
Abstract
Organic halide salts in combination with metal or organic compound are the most common and essential catalysts in ring-opening copolymerizations (ROCOP). However, the role of organic halide salts was neglected. Here, we have uncovered the complex behavior of organic halides in ROCOP of epoxides or aziridine with cyclic anhydride. Coordination of the chain-ends to cations, electron-withdrawing effect, leaving ability of halide atoms, chain-end basicity/nucleophilicity, and terminal steric hindrance cause three types of side reactions: single-site transesterification, substitution, and elimination. Understanding the complex functions of organic halide salts in ROCOP led us to develop highly active and selective aminocyclopropenium chlorides as catalysts/initiators. Adjustable H-bonding interactions of aminocyclopropenium with propagating anions and epoxides create chain-end coordination process that generate highly reactive carboxylate and highly selective alkoxide chain-ends.
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Affiliation(s)
- Jiaxi Xu
- King Abdullah University of Science and Technology (KAUST), Physical Sciences and Engineering Division, KAUST Catalysis Center, Polymer Synthesis Laboratory, Thuwal, 23955, Saudi Arabia
| | - Pengfei Zhang
- King Abdullah University of Science and Technology (KAUST), Physical Sciences and Engineering Division, KAUST Catalysis Center, Polymer Synthesis Laboratory, Thuwal, 23955, Saudi Arabia
| | - Youyou Yuan
- King Abdullah University of Science and Technology (KAUST), Imaging and Characterization Core Lab, Thuwal, 23955, Saudi Arabia
| | - Nikos Hadjichristidis
- King Abdullah University of Science and Technology (KAUST), Physical Sciences and Engineering Division, KAUST Catalysis Center, Polymer Synthesis Laboratory, Thuwal, 23955, Saudi Arabia
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2
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Ullah Khan M, Ullah Khan S, Cao X, Usman M, Yue X, Ghaffar A, Hassan M, Zhang C, Zhang X. Copolymerization of Carbonyl Sulfide and Propylene Oxide via a Heterogeneous Prussian Blue Analogue Catalyst with High Productivity and Selectivity. Chem Asian J 2023; 18:e202201050. [PMID: 36342176 DOI: 10.1002/asia.202201050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 11/01/2022] [Indexed: 11/09/2022]
Abstract
This study demonstrates the superiority of a stable and well-defined heterogeneous cobalt hexacyanocobaltate (Co3 [Co(CN)6 ]2 ), a typical cobalt Prussian Blue Analogue (CoCo-PBA) that catalyzes the copolymerization of carbonyl sulfide (COS) and propylene oxide (PO) to produce poly(propylene monothiocarbonate)s (PPMTC). The number-average molecular weights of the PPMTC were 66.4 to 139.4 kg/mol, with a polydispersity of 2.0-3.9. The catalyst productivity reached 1040 g polymer/g catalyst (12.0 h). The oxygen-sulfur exchange reaction (O/S ER), which would generate random thiocarbonate and carbonate units, was effectively suppressed, and thus the selectivity of the monothiocarbonate over carbonate linkages was up to >99%. It was shown that no cyclic thiocarbonate byproduct was produced during the heterogeneous catalysis of COS/PO copolymerization using CoCo-PBA as the catalyst. The content of monothiocarbonate and ether units in the copolymer chain could be regulated by tuning the feeding amount of COS.
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Affiliation(s)
- Munir Ullah Khan
- State Key Laboratory of Motor Vehicle Biofuel Technology, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, 310027, Hangzhou, P. R. China
| | - Safir Ullah Khan
- Hefei National Laboratory for Physical Science at the Microscale, School of Life Sciences, University of Science and Technology of China, 230027, Hefei, P. R. China
| | - Xiaohan Cao
- State Key Laboratory of Motor Vehicle Biofuel Technology, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, 310027, Hangzhou, P. R. China
| | - Muhammad Usman
- Key Laboratory of Macromolecular Synthesis and Functionalization (Ministry of Education), International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, 310027, Hangzhou, P. R. China
| | - Xinchen Yue
- State Key Laboratory of Motor Vehicle Biofuel Technology, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, 310027, Hangzhou, P. R. China
| | - Abdul Ghaffar
- Advanced Materials Research Center, Zhejiang University-University of Illinois at Urbana-Champaign Institute (ZJU-UIUC), 718 East Haizhou Road, Haining, 314400, Zhejiang, P. R. China
| | - Muhammad Hassan
- Advanced Materials Research Center, Zhejiang University-University of Illinois at Urbana-Champaign Institute (ZJU-UIUC), 718 East Haizhou Road, Haining, 314400, Zhejiang, P. R. China
| | - Chengjian Zhang
- State Key Laboratory of Motor Vehicle Biofuel Technology, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, 310027, Hangzhou, P. R. China
| | - Xinghong Zhang
- State Key Laboratory of Motor Vehicle Biofuel Technology, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, 310027, Hangzhou, P. R. China.,Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, 030013, Shanxi, P. R. China
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3
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Chen YJ, Wu LT, Xiao H, Sun XL, Wan WM. Recent Advances and Challenges in Barbier Polymerization. Chempluschem 2023; 88:e202200388. [PMID: 36581503 DOI: 10.1002/cplu.202200388] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 12/11/2022] [Indexed: 12/15/2022]
Abstract
The Barbier reaction, a classical name reaction for carbon-carbon bond formation, has played important roles in organic chemistry for over 120 years. The introduction of the Barbier reaction into polymer chemistry for the development of a novel Barbier polymerization, expands the methodology, monomer, chemical structure and property libraries of polymerization, aggregation-induced emission (AIE) and non-traditional intrinsic luminescence (NTIL). This mini review focuses on Barbier polymerization, including the brief introduction of the history and importance of polymerization methods design and the achievements of Barbier polymerization from molecular design strategies, functionalities and properties. An outlook of Barbier polymerization is also proposed. This mini review on Barbier polymerization therefore may cause inspirations to scientists in different fields.
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Affiliation(s)
- Yu-Jiao Chen
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, People's Republic of China
- College of Environment and Resources Engineering Research Center of Polymer Green Recycling of Ministry of Education Fujian Key Laboratory of Pollution Control & Resource Reuse, Fujian Normal University, Fuzhou, 350007, P. R. China
| | - Liang-Tao Wu
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, People's Republic of China
- College of Environment and Resources Engineering Research Center of Polymer Green Recycling of Ministry of Education Fujian Key Laboratory of Pollution Control & Resource Reuse, Fujian Normal University, Fuzhou, 350007, P. R. China
| | - Hang Xiao
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, People's Republic of China
- College of Environment and Resources Engineering Research Center of Polymer Green Recycling of Ministry of Education Fujian Key Laboratory of Pollution Control & Resource Reuse, Fujian Normal University, Fuzhou, 350007, P. R. China
| | - Xiao-Li Sun
- College of Environment and Resources Engineering Research Center of Polymer Green Recycling of Ministry of Education Fujian Key Laboratory of Pollution Control & Resource Reuse, Fujian Normal University, Fuzhou, 350007, P. R. China
| | - Wen-Ming Wan
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, People's Republic of China
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4
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Plajer AJ, Williams CK. Heterocycle/Heteroallene Ring-Opening Copolymerization: Selective Catalysis Delivering Alternating Copolymers. Angew Chem Int Ed Engl 2022; 61:e202104495. [PMID: 34015162 PMCID: PMC9298364 DOI: 10.1002/anie.202104495] [Citation(s) in RCA: 46] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Indexed: 11/29/2022]
Abstract
Heteroatom-containing polymers have strong potential as sustainable replacements for petrochemicals, show controllable monomer-polymer equilibria and properties spanning plastics, elastomers, fibres, resins, foams, coatings, adhesives, and self-assembled nanostructures. Their current and future applications span packaging, house-hold goods, clothing, automotive components, electronics, optical materials, sensors, and medical products. An interesting route to these polymers is the catalysed ring-opening copolymerisation (ROCOP) of heterocycles and heteroallenes. It is a living polymerization, occurs with high atom economy, and creates precise, new polymer structures inaccessible by traditional methods. In the last decade there has been a renaissance in research and increasing examples of commercial products made using ROCOP. It is better known in the production of polycarbonates and polyesters, but is also a powerful route to make N-, S-, and other heteroatom-containing polymers, including polyamides, polycarbamates, and polythioesters. This Review presents an overview of the different catalysts, monomer combinations, and polymer classes that can be accessed by heterocycle/heteroallene ROCOP.
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Affiliation(s)
- Alex J. Plajer
- Oxford ChemistryChemical Research Laboratory12 Mansfield RoadOxfordOX1 3TAUK
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5
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Plajer AJ, Williams CK. Heterocycle/Heteroallene Ring‐Opening Copolymerization: Selective Catalysis Delivering Alternating Copolymers. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202104495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Alex J. Plajer
- Oxford Chemistry Chemical Research Laboratory 12 Mansfield Road Oxford OX1 3TA UK
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6
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Harrier DD, Guironnet D. Design rules for performing water-sensitive ring-opening polymerizations in an aqueous dispersion. Polym Chem 2022. [DOI: 10.1039/d2py00069e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The droplet viscosity, surface tension, and hydrophobicity is tuned to explore the parameters that enable successful ring-opening polymerization in an aqueous dispersion.
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Affiliation(s)
- Danielle D. Harrier
- Department of Chemical and Biomolecular Engineering, University of Illinois, Urbana-Champaign, Urbana, IL, 61801, USA
| | - Damien Guironnet
- Department of Chemical and Biomolecular Engineering, University of Illinois, Urbana-Champaign, Urbana, IL, 61801, USA
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7
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Recent trends in biodegradable polyester nanomaterials for cancer therapy. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 127:112198. [PMID: 34225851 DOI: 10.1016/j.msec.2021.112198] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 05/12/2021] [Accepted: 05/18/2021] [Indexed: 12/19/2022]
Abstract
Biodegradable polyester nanomaterials-based drug delivery vehicles (DDVs) have been largely used in most of the cancer treatments due to its high biological performance and wider applications. In several previous studies, various biodegradable and biocompatible polyester backbones were used which are poly(lactic acid) (PLA), poly(ε-caprolactone) (PCL), poly(propylene fumarate) (PPF), poly(lactic-co-glycolic acid) (PLGA), poly(propylene carbonate) (PPC), polyhydroxyalkanoates (PHA), and poly(butylene succinate) (PBS). These polyesters were fabricated into therapeutic nanoparticles that carry drug molecules to the target site during the cancer disease treatment. In this review, we elaborately discussed the chemical synthesis of different synthetic polyesters and their use as nanodrug carriers (NCs) in cancer treatment. Further, we highlighted in brief the recent developments of metal-free semi-aromatic polyester nanomaterials along with its role as cancer drug delivery vehicles.
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8
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Wang Y, Li M, Wang S, Tao Y, Wang X. S
‐Carboxyanhydrides: Ultrafast and Selective Ring‐Opening Polymerizations Towards Well‐defined Functionalized Polythioesters. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202016228] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Yanchao Wang
- Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 P. R. China
- University of Science and Technology of China Hefei 230026 P. R. China
| | - Maosheng Li
- Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 P. R. China
| | - Shixue Wang
- Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 P. R. China
| | - Youhua Tao
- Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 P. R. China
- University of Science and Technology of China Hefei 230026 P. R. China
| | - Xianhong Wang
- Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 P. R. China
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9
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Wang Y, Li M, Wang S, Tao Y, Wang X. S-Carboxyanhydrides: Ultrafast and Selective Ring-Opening Polymerizations Towards Well-defined Functionalized Polythioesters. Angew Chem Int Ed Engl 2021; 60:10798-10805. [PMID: 33605001 DOI: 10.1002/anie.202016228] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Indexed: 12/27/2022]
Abstract
Aliphatic polythioesters are popular polymers because of their appealing performance such as metal coordination ability, high refractive indices, and biodegradability. One of the most powerful approaches for generating these polymers is the ring-opening polymerization (ROP) of cyclic monomers. However, the synthesis of precisely controlled polythioesters via ROP of thiolactones still faces formidable challenges, including the minimal functional diversity of available thiolactone monomers, as well as inevitable transthioesterification side reactions. Here we introduce a hyperactive class of S-carboxyanhydride (SCA) monomers derived from amino acids that are significantly more reactive than thiolactones for ultrafast and selective ROP. Inclusion of the initiator PPNOBz ([PPN]=bis(triphenylphosphine)-iminium) with chain transfer agent benzoic acid, the polymerizations that can be operated in open vessels reach complete conversion within minutes (1-2 min) at room temperature, yielding polythioesters with predictable molecular weight, low dispersities, retained stereoregularity and chemical recyclability. Most fascinating are the functionalized SCAs that allow the incorporating of functional groups along the polythioester chain and thus finely tune their physicochemical performance. Computational studies were carried out to explore the origins of the distinctive rapidity and exquisite selectivity of the polymerizations, offering mechanistic insight and explaining why high polymerizability of SCA monomer is able to facilitate exquisitely selective ring-opening for enchainment over competing transthioesterification and backbiting reactions.
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Affiliation(s)
- Yanchao Wang
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, P. R. China.,University of Science and Technology of China, Hefei, 230026, P. R. China
| | - Maosheng Li
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, P. R. China
| | - Shixue Wang
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, P. R. China
| | - Youhua Tao
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, P. R. China.,University of Science and Technology of China, Hefei, 230026, P. R. China
| | - Xianhong Wang
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, P. R. China
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10
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Yue T, Ren B, Zhang W, Lu X, Ren W, Darensbourg DJ. Randomly Distributed Sulfur Atoms in the Main Chains of CO
2
‐Based Polycarbonates: Enhanced Optical Properties. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202012565] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Tian‐Jun Yue
- State Key Laboratory of Fine Chemicals Dalian University of Technology 2 Linggong Road Dalian 116024 China
- DepartmentDepartment of Chemistry Texas A&M University College Station TX 77843 USA
| | - Bai‐Hao Ren
- State Key Laboratory of Fine Chemicals Dalian University of Technology 2 Linggong Road Dalian 116024 China
| | - Wen‐Jian Zhang
- State Key Laboratory of Fine Chemicals Dalian University of Technology 2 Linggong Road Dalian 116024 China
| | - Xiao‐Bing Lu
- State Key Laboratory of Fine Chemicals Dalian University of Technology 2 Linggong Road Dalian 116024 China
| | - Wei‐Min Ren
- State Key Laboratory of Fine Chemicals Dalian University of Technology 2 Linggong Road Dalian 116024 China
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11
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Jia M, Hadjichristidis N, Gnanou Y, Feng X. Polyurethanes from Direct Organocatalytic Copolymerization of
p
‐Tosyl Isocyanate with Epoxides. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202011902] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Mingchen Jia
- Physical Sciences and Engineering Division and KAUST Catalysis Center King Abdullah University of Science and Technology (KAUST) Thuwal 23955 Saudi Arabia
| | - Nikos Hadjichristidis
- Physical Sciences and Engineering Division and KAUST Catalysis Center King Abdullah University of Science and Technology (KAUST) Thuwal 23955 Saudi Arabia
| | - Yves Gnanou
- Physical Sciences and Engineering Division and KAUST Catalysis Center King Abdullah University of Science and Technology (KAUST) Thuwal 23955 Saudi Arabia
| | - Xiaoshuang Feng
- Physical Sciences and Engineering Division and KAUST Catalysis Center King Abdullah University of Science and Technology (KAUST) Thuwal 23955 Saudi Arabia
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12
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Yue TJ, Ren BH, Zhang WJ, Lu XB, Ren WM, Darensbourg DJ. Randomly Distributed Sulfur Atoms in the Main Chains of CO 2 -Based Polycarbonates: Enhanced Optical Properties. Angew Chem Int Ed Engl 2020; 60:4315-4321. [PMID: 33180984 DOI: 10.1002/anie.202012565] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 11/03/2020] [Indexed: 01/08/2023]
Abstract
Polymeric materials possessing both high refractive indices and high Abbe numbers are much in demand for the development of advanced optical devices. However, the synthesis of such functional materials is a challenge because of the trade-off between these two properties. Herein, a synthetic strategy is presented for enhancing the optical properties of CO2 -based polycarbonates by modifying the polymer's topological structure. Terpolymers with thiocarbonate and carbonate units randomly distributed in the polymers' main chain were synthesized via the terpolymerization of cyclohexene oxide with a mixture of CO2 and COS in the presence of metal catalysts, most notably a dinuclear aluminum complex. DFT calculations were employed to explain why different structural sequence were obtained with distinct bimetallic catalysts. Varying the CO2 pressure made it possible to obtain terpolymers with tunable carbonate linkages in the polymer chain. More importantly, optical property studies revealed that terpolymers with comparable thiocarbonate and carbonate units exhibited a refractive index of 1.501 with an enhanced Abbe number as high as 48.6, much higher than the corresponding polycarbonates or polythiocarbonates. Additionally, all terpolymers containing varying thiocarbonate content displayed good thermal properties with Tg >109 °C and Td >260 °C, suggesting little loss in the thermal stability compared to the polycarbonate. Hence, modification of the topological structure of the polycarbonate is an efficient method of obtaining polymeric materials with enhanced optical properties without compromising thermal performance.
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Affiliation(s)
- Tian-Jun Yue
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian, 116024, China.,DepartmentDepartment of Chemistry, Texas A&M University, College Station, TX, 77843, USA
| | - Bai-Hao Ren
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian, 116024, China
| | - Wen-Jian Zhang
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian, 116024, China
| | - Xiao-Bing Lu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian, 116024, China
| | - Wei-Min Ren
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian, 116024, China
| | - Donald J Darensbourg
- DepartmentDepartment of Chemistry, Texas A&M University, College Station, TX, 77843, USA
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13
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Jia M, Hadjichristidis N, Gnanou Y, Feng X. Polyurethanes from Direct Organocatalytic Copolymerization of p-Tosyl Isocyanate with Epoxides. Angew Chem Int Ed Engl 2020; 60:1593-1598. [PMID: 32989882 DOI: 10.1002/anie.202011902] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Indexed: 01/29/2023]
Abstract
The direct copolymerization of p-tosyl isocyanate (TSI) with epoxides, initiated by onium salts in the presence of trialkylborane, to produce polyurethanes is reported. The rate of copolymerization and the (regio)selectivity were investigated in relation to the trialkylborane and the initiator used. Under optimized conditions such copolymerizations have been successfully performed for a wide range of epoxides, including ethylene oxide, propylene oxide, 1-octene oxide, cyclohexene oxide, and allyl glycidyl ether. These copolymerizations afford a new category of polyurethanes, clear of side products such as cyclic oxazolidinone, isocyanurate, and poly(isocyanate) linkages. The experimental conditions used in this work are compatible with those for the organocatalytic (co)polymerization of other oxygenated monomers and CO2 , holding the potential for their terpolymerization with p-tosyl isocyanate and the development of new materials with unprecedented properties.
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Affiliation(s)
- Mingchen Jia
- Physical Sciences and Engineering Division and KAUST Catalysis Center, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955, Saudi Arabia
| | - Nikos Hadjichristidis
- Physical Sciences and Engineering Division and KAUST Catalysis Center, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955, Saudi Arabia
| | - Yves Gnanou
- Physical Sciences and Engineering Division and KAUST Catalysis Center, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955, Saudi Arabia
| | - Xiaoshuang Feng
- Physical Sciences and Engineering Division and KAUST Catalysis Center, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955, Saudi Arabia
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14
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Yue T, Bhat GA, Zhang W, Ren W, Lu X, Darensbourg DJ. Facile Synthesis of Well‐Defined Branched Sulfur‐Containing Copolymers: One‐Pot Copolymerization of Carbonyl Sulfide and Epoxide. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202005806] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Tian‐Jun Yue
- State Key Laboratory of Fine Chemicals Dalian University of Technology 2 Linggong Road Dalian 116024 China
- Department of Chemistry Texas A&M University College Station TX 77843 USA
| | - Gulzar A. Bhat
- Department of Chemistry Texas A&M University College Station TX 77843 USA
| | - Wen‐Jian Zhang
- State Key Laboratory of Fine Chemicals Dalian University of Technology 2 Linggong Road Dalian 116024 China
| | - Wei‐Min Ren
- State Key Laboratory of Fine Chemicals Dalian University of Technology 2 Linggong Road Dalian 116024 China
| | - Xiao‐Bing Lu
- State Key Laboratory of Fine Chemicals Dalian University of Technology 2 Linggong Road Dalian 116024 China
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15
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Yue TJ, Bhat GA, Zhang WJ, Ren WM, Lu XB, Darensbourg DJ. Facile Synthesis of Well-Defined Branched Sulfur-Containing Copolymers: One-Pot Copolymerization of Carbonyl Sulfide and Epoxide. Angew Chem Int Ed Engl 2020; 59:13633-13637. [PMID: 32372553 DOI: 10.1002/anie.202005806] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Indexed: 12/18/2022]
Abstract
Topological polymers possess many advantages over linear polymers. However, when it comes to the poly(monothiocarbonate)s, no topological polymers have been reported. Described herein is a facile and efficient approach for synthesizing well-defined branched poly(monothiocarbonate)s in a "grafting through" manner by copolymerizing carbonyl sulfide (COS) with epichlorohydrin (ECH), where the side-chain forms in situ. The lengths of the side-chains are tunable based on reaction temperatures. More importantly, enhancement in thermal properties of the branched copolymer was observed, as the Tg value increased by 22 °C, compared to the linear analogues. When chiral ECH was utilized, semicrystalline branched poly(monothiocarbonate)s were accessible with a Tm value of 112 °C, which is 40 °C higher than that of the corresponding linear poly(monothiocarbonate)s. The strategy presented herein for synthesizing branched polymers provides efficient and concise access to topological polymers.
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Affiliation(s)
- Tian-Jun Yue
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian, 116024, China.,Department of Chemistry, Texas A&M University, College Station, TX, 77843, USA
| | - Gulzar A Bhat
- Department of Chemistry, Texas A&M University, College Station, TX, 77843, USA
| | - Wen-Jian Zhang
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian, 116024, China
| | - Wei-Min Ren
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian, 116024, China
| | - Xiao-Bing Lu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian, 116024, China
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16
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Bai Y, Wang H, He J, Zhang Y. Rapid and Scalable Access to Sequence‐Controlled DHDM Multiblock Copolymers by FLP Polymerization. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202004013] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Yun Bai
- State Key Laboratory of Supramolecular Structure and Materials College of Chemistry Jilin University Changchun Jilin 130012 China
| | - Huaiyu Wang
- State Key Laboratory of Supramolecular Structure and Materials College of Chemistry Jilin University Changchun Jilin 130012 China
| | - Jianghua He
- State Key Laboratory of Supramolecular Structure and Materials College of Chemistry Jilin University Changchun Jilin 130012 China
| | - Yuetao Zhang
- State Key Laboratory of Supramolecular Structure and Materials College of Chemistry Jilin University Changchun Jilin 130012 China
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17
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Bai Y, Wang H, He J, Zhang Y. Rapid and Scalable Access to Sequence-Controlled DHDM Multiblock Copolymers by FLP Polymerization. Angew Chem Int Ed Engl 2020; 59:11613-11619. [PMID: 32237265 DOI: 10.1002/anie.202004013] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 03/26/2020] [Indexed: 12/25/2022]
Abstract
An immortal N-(diphenylphosphanyl)-1,3-diisopropyl-4,5-dimethyl-1,3-dihydro-2H-imidazol-2-imine/diisobutyl (2,6-di-tert-butyl-4-methylphenoxy) aluminum (P(NIi Pr)Ph2 /(BHT)Ali Bu2 )-based frustrated Lewis pair (FLP) polymerization strategy is presented for rapid and scalable synthesis of the sequence-controlled multiblock copolymers at room temperature. Without addition of extra initiator or catalyst and complex synthetic procedure, this method enabled a tripentacontablock copolymer (n=53, k=4, dpn =50) to be achieved with the highest reported block number (n=53) and molecular weight (Mn =310 kg mol-1 ) within 30 min. More importantly, this FLP polymerization strategy provided access to the multiblock copolymers with tailored properties by precisely adjusting the monomer sequence and block numbers.
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Affiliation(s)
- Yun Bai
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, Jilin, 130012, China
| | - Huaiyu Wang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, Jilin, 130012, China
| | - Jianghua He
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, Jilin, 130012, China
| | - Yuetao Zhang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, Jilin, 130012, China
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18
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Hu LF, Chen DJ, Yang JL, Zhang XH. An Investigation of the Organoborane/Lewis Base Pairs on the Copolymerization of Propylene Oxide with Succinic Anhydride. Molecules 2020; 25:E253. [PMID: 31936276 PMCID: PMC7024261 DOI: 10.3390/molecules25020253] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2019] [Revised: 12/22/2019] [Accepted: 12/27/2019] [Indexed: 11/17/2022] Open
Abstract
The copolymerization of biorenewable succinic anhydride (SA) with propylene oxide (PO) is a promising way to synthesize biodegradable aliphatic polyesters. However, the catalytic systems for this reaction still deserve to be explored because the catalytic activity of the reported catalysts and the molecular weights of produced polyesters are unsatisfied. Herein, we investigate the copolymerization of SA with PO catalyzed by the organoborane/base pairs. The types of Lewis bases, organoboranes, and their loadings all have a large impact on the activity and selectivity of the copolymerization. High ester content of >99% was achieved when performed the PO/SA copolymerization using triethyl borane (TEB)/phosphazene base P1-t-Bu (t-BuP1) pair with a molar ratio of 1/1 at 30-80 °C. Using TEB/t-BuP1 pair with the molar ratio of 4/1 at 80 °C, the turnover of frequency (TOF) was up to 128 h-1 and clearly higher than the known TOF values (0.5-34 h-1) of the PO/SA copolymerization by previously reported catalysts. The number-average molecular weights (Mns) of the resultant polyesters reached up to 20.4 kg/mol when copolymerization was carried out using TEB/t-BuP1 (1/1, in molar ratio) at 30 °C.
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Affiliation(s)
| | | | | | - Xing-Hong Zhang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China; (L.-F.H.); (D.-J.C.); (J.-L.Y.)
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19
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Liu S, Bai T, Ni K, Chen Y, Zhao J, Ling J, Ye X, Zhang G. Biased Lewis Pairs: A General Catalytic Approach to Ether‐Ester Block Copolymers with Unlimited Ordering of Sequences. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201908904] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Shan Liu
- Faculty of Materials Science and Engineering South China University of Technology Guangzhou 510640 P. R. China
| | - Tianwen Bai
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China
| | - Kang Ni
- Hefei National Laboratory for Physical Sciences at the Microscale Department of Chemical Physics University of Science and Technology of China Hefei 230026 China
| | - Ye Chen
- Faculty of Materials Science and Engineering South China University of Technology Guangzhou 510640 P. R. China
| | - Junpeng Zhao
- Faculty of Materials Science and Engineering South China University of Technology Guangzhou 510640 P. R. China
| | - Jun Ling
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China
| | - Xiaodong Ye
- Hefei National Laboratory for Physical Sciences at the Microscale Department of Chemical Physics University of Science and Technology of China Hefei 230026 China
| | - Guangzhao Zhang
- Faculty of Materials Science and Engineering South China University of Technology Guangzhou 510640 P. R. China
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20
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Liu S, Bai T, Ni K, Chen Y, Zhao J, Ling J, Ye X, Zhang G. Biased Lewis Pairs: A General Catalytic Approach to Ether-Ester Block Copolymers with Unlimited Ordering of Sequences. Angew Chem Int Ed Engl 2019; 58:15478-15487. [PMID: 31464086 DOI: 10.1002/anie.201908904] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 08/13/2019] [Indexed: 12/12/2022]
Abstract
Polymerizing epoxides after cyclic esters remains a major challenge, though their block copolymers have been extensively studied and used for decades. Reported here is a simple catalytic approach based on a metal-free Lewis pair that addresses the challenge. When the Lewis acid is used in excess of a base, selective (transesterification-free) polymerization of epoxides occurs in the presence of esters, while selectivity toward cyclic esters is achieved by an oppositely biased catalyst. Hence, one-pot block copolymerization can be performed in both ester-first and ether-first orders with selectivity being switchable at any stage, yielding ether-ester-type block copolymers with unlimited ordering of sequences as well as widely variable compositions and architectures. The selectivity can also be switched back and forth several times to generate a multiblock copolymer. Experimental and calculational results indicate that the selectivity originates mainly from the state of catalyst-activated hydroxy species.
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Affiliation(s)
- Shan Liu
- Faculty of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, P. R. China
| | - Tianwen Bai
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Kang Ni
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, 230026, China
| | - Ye Chen
- Faculty of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, P. R. China
| | - Junpeng Zhao
- Faculty of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, P. R. China
| | - Jun Ling
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Xiaodong Ye
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, 230026, China
| | - Guangzhao Zhang
- Faculty of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, P. R. China
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21
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Zhou H, Zhang R, Mu S, Zhang H, Lu X. Organocatalytic Cyclization of COS and Propargylic Derivatives to Value‐Added Heterocyclic Compounds. ChemCatChem 2019. [DOI: 10.1002/cctc.201900490] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Hui Zhou
- State Key Laboratory of Fine ChemicalsDalian University of Technology No. 2 Linggong Road, Ganjingzi District Dalian City 116024 P.R. China
| | - Rui Zhang
- State Key Laboratory of Fine ChemicalsDalian University of Technology No. 2 Linggong Road, Ganjingzi District Dalian City 116024 P.R. China
| | - Sen Mu
- State Key Laboratory of Fine ChemicalsDalian University of Technology No. 2 Linggong Road, Ganjingzi District Dalian City 116024 P.R. China
| | - Hui Zhang
- State Key Laboratory of Fine ChemicalsDalian University of Technology No. 2 Linggong Road, Ganjingzi District Dalian City 116024 P.R. China
| | - Xiao‐Bing Lu
- State Key Laboratory of Fine ChemicalsDalian University of Technology No. 2 Linggong Road, Ganjingzi District Dalian City 116024 P.R. China
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22
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Zhang CJ, Duan HY, Hu LF, Zhang CH, Zhang XH. Metal-Free Route to Precise Synthesis of Poly(propylene oxide) and Its Blocks with High Activity. CHEMSUSCHEM 2018; 11:4209-4213. [PMID: 30346658 DOI: 10.1002/cssc.201802258] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Indexed: 06/08/2023]
Abstract
The fast and living ring-opening polymerization (ROP) of propylene oxide (PO) by metal-free catalysis is reported. By using triethyl borane (TEB) and organic Lewis bases (LBs, e.g.: phosphazene base, amidine and guanidine) as the catalysts, various alkyl alcohols can effectively initiate the ROP of PO, yielding tailor-made poly(propylene oxide)s (PPOs) with high regioregularity, predictable molecular weights, and narrow dispersity approaching Poisson distribution. The TEB/LB catalysts present unprecedentedly high activity (turnover frequency of up to 7500 h-1 ) and a truly living character for the polymerization, as evidenced by kinetic studies that showed fast initiation and growth, unobserved chain-transfer to PO, chain extension reactions, and the synthesis of various PPO-based block copolymers with narrow dispersities (Đ<1.1).
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Affiliation(s)
- Cheng-Jian Zhang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Han-Yi Duan
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Lan-Fang Hu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Cheng-Hui Zhang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Xing-Hong Zhang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China
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23
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Bai Y, He J, Zhang Y. Ultra‐High‐Molecular‐Weight Polymers Produced by the Immortal Phosphine‐Based Catalyst System. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201811946] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Yun Bai
- State Key Laboratory of Supramolecular Structure and Materials College of Chemistry Jilin University Changchun Jilin 130012 China
| | - Jianghua He
- State Key Laboratory of Supramolecular Structure and Materials College of Chemistry Jilin University Changchun Jilin 130012 China
| | - Yuetao Zhang
- State Key Laboratory of Supramolecular Structure and Materials College of Chemistry Jilin University Changchun Jilin 130012 China
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24
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Bai Y, He J, Zhang Y. Ultra-High-Molecular-Weight Polymers Produced by the Immortal Phosphine-Based Catalyst System. Angew Chem Int Ed Engl 2018; 57:17230-17234. [PMID: 30380182 DOI: 10.1002/anie.201811946] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Indexed: 01/13/2023]
Abstract
A strong organophosphorus superbase, N-(diphenylphosphanyl)-1,3-diisopropyl-4,5-dimethyl-1,3-dihydro-2H-imidazol-2-imine (IAP3) was combined with a sterically encumbered but modestly acidic Lewis acid (LA), (4-Me-2,6-t Bu2 -C6 H2 O)Ali Bu2 ((BHT)Ali Bu2 ), to synergistically promote the frustrated Lewis pair (FLP)-catalyzed living polymerization of methyl methacrylate (MMA), achieving ultrahigh molecular weight (UHMW) poly(methyl methacrylate) (PMMA) with Mn up to 1927 kg mol-1 and narrow molecular weight distribution (MWD) at room temperature (RT). This FLP catalyst system exhibits exceptionally long lifetime polymerization performance even in the absence of free MMA, which could reinitiate the desired living polymerization after the resulting system was held at RT for 24 h.
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Affiliation(s)
- Yun Bai
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, Jilin, 130012, China
| | - Jianghua He
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, Jilin, 130012, China
| | - Yuetao Zhang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, Jilin, 130012, China
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25
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Yue TJ, Ren WM, Chen L, Gu GG, Liu Y, Lu XB. Synthesis of Chiral Sulfur-Containing Polymers: Asymmetric Copolymerization of meso
-Epoxides and Carbonyl Sulfide. Angew Chem Int Ed Engl 2018; 57:12670-12674. [DOI: 10.1002/anie.201805200] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 07/31/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Tian-Jun Yue
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; 2 Linggong Road Dalian 116024 China
| | - Wei-Min Ren
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; 2 Linggong Road Dalian 116024 China
| | - Li Chen
- Faculty of Machenical Engineering Materials and Energy; Dalian University of Technology; 2 Linggong Road Dalian 116024 China
| | - Ge-Ge Gu
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; 2 Linggong Road Dalian 116024 China
| | - Ye Liu
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; 2 Linggong Road Dalian 116024 China
| | - Xiao-Bing Lu
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; 2 Linggong Road Dalian 116024 China
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26
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Yue TJ, Ren WM, Chen L, Gu GG, Liu Y, Lu XB. Synthesis of Chiral Sulfur-Containing Polymers: Asymmetric Copolymerization of meso
-Epoxides and Carbonyl Sulfide. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201805200] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Tian-Jun Yue
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; 2 Linggong Road Dalian 116024 China
| | - Wei-Min Ren
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; 2 Linggong Road Dalian 116024 China
| | - Li Chen
- Faculty of Machenical Engineering Materials and Energy; Dalian University of Technology; 2 Linggong Road Dalian 116024 China
| | - Ge-Ge Gu
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; 2 Linggong Road Dalian 116024 China
| | - Ye Liu
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; 2 Linggong Road Dalian 116024 China
| | - Xiao-Bing Lu
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; 2 Linggong Road Dalian 116024 China
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27
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Krachko T, Nicolas E, Ehlers AW, Nieger M, Slootweg JC. Ring-opening of Epoxides Mediated by Frustrated Lewis Pairs. Chemistry 2018; 24:12669-12677. [DOI: 10.1002/chem.201801909] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 06/06/2018] [Indexed: 11/07/2022]
Affiliation(s)
- Tetiana Krachko
- Van 't Hoff Institute for Molecular Sciences; University of Amsterdam; Science Park 904, P.O. Box 94157 1090 GD Amsterdam The Netherlands
| | - Emmanuel Nicolas
- Van 't Hoff Institute for Molecular Sciences; University of Amsterdam; Science Park 904, P.O. Box 94157 1090 GD Amsterdam The Netherlands
- Current address: NIMBE, CEA, CNRS; Université Paris-Saclay, CEA Saclay; 91191 Gif sur Yvette Cedex France
| | - Andreas W. Ehlers
- Van 't Hoff Institute for Molecular Sciences; University of Amsterdam; Science Park 904, P.O. Box 94157 1090 GD Amsterdam The Netherlands
- Department of Chemistry, Science Faculty; University of Johannesburg; P.O. Box 254 Auckland Park Johannesburg South Africa
| | - Martin Nieger
- Department of Chemistry; University of Helsinki; A. I. Virtasen aukio 1, P.O. Box 55 Helsinki Finland
| | - J. Chris Slootweg
- Van 't Hoff Institute for Molecular Sciences; University of Amsterdam; Science Park 904, P.O. Box 94157 1090 GD Amsterdam The Netherlands
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28
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Hu Y, Yin Z, Werner T, Spannenberg A, Wu XF. 1,8-Diazabicyclo[5.4.0]undec-7-ene-Catalyzed Carbonylative Cyclization of Propargylic Alcohols with Elemental Sulfur. European J Org Chem 2018. [DOI: 10.1002/ejoc.201701813] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yuya Hu
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock; Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Zhiping Yin
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock; Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Thomas Werner
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock; Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Anke Spannenberg
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock; Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Xiao-Feng Wu
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock; Albert-Einstein-Straße 29a 18059 Rostock Germany
- Department of Chemistry; Zhejiang Sci-Tech University; Xiasha Campus 310018 Hangzhou People's Republic of China
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