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Wang J, Xu S, Hu X, Huo Y, Shi X. Rare-Earth Metal Complexes Bearing Pyridyl-Functionalized Amidinate Ligands for Highly trans-1,4-Selective Living (Co)Polymerization of 1,3-Conjugated Dienes. Organometallics 2022. [DOI: 10.1021/acs.organomet.1c00557] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jixing Wang
- Department of Polymer Materials, School of Materials Science and Engineering, Shanghai University, Materials Building, Nanchen Street 333, Shanghai 200444, China
| | - Suting Xu
- Department of Polymer Materials, School of Materials Science and Engineering, Shanghai University, Materials Building, Nanchen Street 333, Shanghai 200444, China
| | - Xiang Hu
- Department of Polymer Materials, School of Materials Science and Engineering, Shanghai University, Materials Building, Nanchen Street 333, Shanghai 200444, China
| | - Yanchen Huo
- Department of Polymer Materials, School of Materials Science and Engineering, Shanghai University, Materials Building, Nanchen Street 333, Shanghai 200444, China
| | - Xiaochao Shi
- Department of Polymer Materials, School of Materials Science and Engineering, Shanghai University, Materials Building, Nanchen Street 333, Shanghai 200444, China
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Basalova OA, Tolpygin AO, Kovylina TA, Cherkasov AV, Fukin GK, Lyssenko KA, Trifonov AA. Bis(tetramethylaluminate) Lanthanide Complexes Supported by Amidinate Ligands with a Pendant Ph 2P═X (X = O, S) Group: Application in Isoprene Polymerization. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00287] [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]
Affiliation(s)
- Olesya A. Basalova
- Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina 49, GSP-445, 603950 Nizhny Novgorod, Russia
| | - Aleksei O. Tolpygin
- Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina 49, GSP-445, 603950 Nizhny Novgorod, Russia
- Institute of Organoelement Compounds of Russian Academy of Sciences, Vavilova str. 28, 119334 Moscow, Russia
| | - Tatyana A. Kovylina
- Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina 49, GSP-445, 603950 Nizhny Novgorod, Russia
| | - Anton V. Cherkasov
- Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina 49, GSP-445, 603950 Nizhny Novgorod, Russia
| | - Georgy K. Fukin
- Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina 49, GSP-445, 603950 Nizhny Novgorod, Russia
| | - Konstantin A. Lyssenko
- Institute of Organoelement Compounds of Russian Academy of Sciences, Vavilova str. 28, 119334 Moscow, Russia
| | - Alexander A. Trifonov
- Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina 49, GSP-445, 603950 Nizhny Novgorod, Russia
- Institute of Organoelement Compounds of Russian Academy of Sciences, Vavilova str. 28, 119334 Moscow, Russia
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Evans KJ, Morton PA, Sangster C, Mansell SM. One-step synthesis of heteroleptic rare-earth amide complexes featuring fluorenyl-tethered N-heterocyclic carbene ligands. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Lin J, Wang F, Zhang C, Liu H, Li D, Zhang X. Copolymerization of 1,3-butadiene with phenyl/phenethyl substituted 1,3-butadienes: a direct strategy to access pendant phenyl functionalized polydienes. RSC Adv 2021; 11:23184-23191. [PMID: 35479781 PMCID: PMC9036356 DOI: 10.1039/d1ra02467a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 06/18/2021] [Indexed: 11/26/2022] Open
Abstract
Copolymerization of 1,3-butadiene with various types of phenyl substituted 1,3-butadiene derivatives, including (E)-1-phenyl-1,3-butadiene (PBD), 1-phenethyl-1,3-butadiene (PEBD), 1-(4-methoxylphenyl)-1,3-butadiene (p-MEPBD), 1-(2-methoxylphenyl)-1,3-butadiene (o-MEPBD) and 1-(4-N,N-dimethylaminophenyl)-1,3-butadiene (p-DMPBD), by using a coordination polymerization system of CpTiCl3/MAO is reported herein. Comonomers PBD and PEBD can be copolymerized with 1,3-butadiene in a large range of comonomer feed ratios (0–44.6% for PBD, 0–30.2% for PEBD), affording the targeted copolymers with well-controlled comonomer incorporations, molecular weights, polydispersities and microstructure, whereas no corresponding copolymer products were obtained under identical conditions when p-MEPBD, o-MEPBD and p-DMPBD were employed. Moreover, different polymerization parameters, including temperature, Al/Ti ratio, etc., posed a significant influence on the polymerization behaviors, as well as the properties of the resultant copolymers. Microstructure analysis by NMR spectra revealed high 1,4-selectivities of the catalysts, and the glass transition temperature (Tg) of the resulted copolymer was found to be highly dependent on the incorporation content of the comonomers; with an increasing comonomer content, a gradually increasing Tg was demonstrated. Copolymerization of 1,3-butadiene with various phenyl substituted 1,3-butadiene derivatives to access pendant phenyl functionalized polydiene elastomers is reported.![]()
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Affiliation(s)
- Juan Lin
- Hainan Rubber Industry Group Co., Ltd
- Haikou City
- China
| | - Feng Wang
- Key Laboratory of Rubber-Plastics
- Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics
- Qingdao University of Science & Technology
- Qingdao
- China
| | - Chunyu Zhang
- Key Laboratory of Rubber-Plastics
- Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics
- Qingdao University of Science & Technology
- Qingdao
- China
| | - Heng Liu
- Key Laboratory of Rubber-Plastics
- Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics
- Qingdao University of Science & Technology
- Qingdao
- China
| | - Dexin Li
- Hainan Rubber Industry Group Co., Ltd
- Haikou City
- China
| | - Xuequan Zhang
- Key Laboratory of Rubber-Plastics
- Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics
- Qingdao University of Science & Technology
- Qingdao
- China
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Recent Advances in Rare Earth Complexes Containing N-Heterocyclic Carbenes: Synthesis, Reactivity, and Applications in Polymerization. Catalysts 2020. [DOI: 10.3390/catal10010071] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
N-heterocyclic carbenes (NHCs) are ubiquitous ancillary ligands employed in metal-catalyzed homogeneous reactions and polymerization reactions. Of significance is the use of NHCs as the supporting ligand in second- and third-generation Grubbs catalysts for their application in olefin metathesis and ring-opening metathesis polymerization. While the applications of transition metal catalysts ligated with NHCs in polymerization chemistry are well-documented, the use of analogous rare earth (Ln = Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu) catalysts in this area remains under-developed, despite the unique role of rare earth elements in regio- and stereo-specific (co)polymerization reactions. By using hetero-atom-tethered chelating NHCs and, more recently, the employment of other structurally related NHCs, NHC-ligated Ln complexes have proven to be promising and fruitful catalysts for selective polymerization reactions. This review summarizes the recent developments in the coordination chemistry of Ln complexes containing NHCs and their catalytic performance in polymerization.
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Abstract
Synthetic rubbers fabricated from 1,3-butadiene (BD) and its substituted monomers have been extensively used in tires, toughened plastics, and many other products owing to the easy polymerization/copolymerization of these monomers and the high stability of the resulting material in manufacturing operations and large-scale productions. The need for synthetic rubbers with increased environmental friendliness or endurance in harsh environments has motivated remarkable progress in the synthesis of BD and its substituted monomers in recent years. We review these developments with an emphasis on the reactive routes, the products, and the synthetic strategies with a scaling potential. We present reagents that are primarily from bio-derivatives, including ethanol, C4 alcohols, unsaturated alcohols, and tetrahydrofuran; the major products of BD and isoprene; and the by-products, activities, and selectivity of the reaction. Different catalyst systems are also compared. Further, substituted monomers with rigid, polar, or sterically repulsive groups, the purpose of which is to enhance thermal, mechanical, and interface properties, are also exhaustively reviewed. The synthetic strategies using BD and its substituted monomers have great potential to satisfy the increasing demand for better-performing synthetic rubbers at the laboratory scale; the laboratory-scale results are promising, but a big gap still exists between current progress and large scalability.
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Liang S, Zhang H, Cong R, Liu H, Wang F, Hu Y, Zhang X. In-chain functionalized syndiotactic 1,2-polybutadiene by a Ziegler–Natta iron( iii) catalytic system. RSC Adv 2019; 9:33465-33471. [PMID: 35529129 PMCID: PMC9073536 DOI: 10.1039/c9ra06499k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 02/02/2021] [Accepted: 10/08/2019] [Indexed: 11/24/2022] Open
Abstract
Copolymerization of 1,3-butadiene with four 1-substituted 1,3-diene comonomers bearing amino and alkyoxy groups by a Ziegler–Natta iron(iii) catalytic system to access in-chain functionalized syndiotactic 1,2-polybutadiene is reported herein. The polar comonomer content can be easily regulated by varying the comonomer loadings or polymerization conditions, affording functionalized syndiotactic 1,2-polybutadiene with different amounts of functionalities. The incorporation of a polar comonomer showed little influence on the 1,2-content and stereoregularity of the resulting polymers, giving a 1,2-structure as high as ∼85% and an rrrr pentad of 81.0%. Significantly improved surface properties of the polymers was obtained after incorporation of polar comonomer, as revealed from the remarkably decreased water contact angles. In-chain functionalized syndiotactic 1,2-polybutadiene through copolymerization of 1,3-butadiene and 1-substituted 1,3-diene comonomer by a Ziegler–Natta iron(iii) catalytic system.![]()
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Affiliation(s)
- Shanshan Liang
- College of Material Science and Engineering
- Shenyang University of Chemical Technology
- Shenyang 110142
- China
- CAS Key Laboratory of High-Performance Synthetic Rubber and Its Composite Materials
| | - Huaqiang Zhang
- Lanzhou Petrochemical Research Center
- Petrochemical Research Institute
- PetroChina
- Lanzhou
- China
| | - Rixin Cong
- Lanzhou Petrochemical Research Center
- Petrochemical Research Institute
- PetroChina
- Lanzhou
- China
| | - Heng Liu
- CAS Key Laboratory of High-Performance Synthetic Rubber and Its Composite Materials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- P. R. China
| | - Feng Wang
- CAS Key Laboratory of High-Performance Synthetic Rubber and Its Composite Materials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- P. R. China
| | - Yanming Hu
- CAS Key Laboratory of High-Performance Synthetic Rubber and Its Composite Materials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- P. R. China
| | - Xuequan Zhang
- CAS Key Laboratory of High-Performance Synthetic Rubber and Its Composite Materials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- P. R. China
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Cai Y, Lu J, Zuo D, Li S, Cui D, Han B, Yang W. Extremely High Glass Transition Temperature Hydrocarbon Polymers Prepared through Cationic Cyclization of Highly 3,4-Regulated Poly(Phenyl-1,3-Butadiene). Macromol Rapid Commun 2018; 39:e1800298. [PMID: 30085365 DOI: 10.1002/marc.201800298] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 07/11/2018] [Indexed: 11/09/2022]
Abstract
A simple approach to synthesize extremely high glass transition temperature (Tg > 300 °C) hydrocarbon polymers that introduces bridged cyclic backbone and bulky pendant group simultaneously is reported. This method uses highly 3,4-regulated poly(phenyl-1,3-butadiene) as a prepolymer for cationic cyclization postmodification. The Tg of cyclized highly 3,4-regulated (94.0%) poly(1-phenyl-1,3-butadiene) (P(1-PB)) can reach 304 °C. To further restrict the movement of bridged cyclic backbone by changing the position of the pendant substituent group, highly 3,4-regulated (96.2%) poly(2-phenyl-1,3-butadiene) (P(2-PB)) is used as the prepolymer. The Tg of its cyclized product reaches 325 °C, and this value is the highest ever reported among all hydrocarbon polymers. The results indicate that the regularity of poly(phenyl-1,3-butadiene) and the pendant substituent group are crucial factors when synthesizing high-temperature hydrocarbon polymers through this approach.
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Affiliation(s)
- Yang Cai
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Jianmin Lu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Danlin Zuo
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Shihui Li
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, P. R. China
| | - Dongmei Cui
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, P. R. China
| | - Bingyong Han
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Wantai Yang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
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Qi Y, Cui F, He J, Cui L, Li Y, Dai Q, Bai C. Insight into performance of lactam-based Brønsted-acidic catalysts for Prins condensation and their self-separation in water. MOLECULAR CATALYSIS 2018. [DOI: 10.1016/j.mcat.2017.11.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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