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Zhao Y, Xu S, Yu Y, Liu H, Wang F, Na L, Yang Q, Zhang C, Zhang X. Preparation and Characterization of Soft-Hard Block Copolymer of 3,4-IP- b- s-1,2-PBD Using a Robust Iron-Based Catalyst System. Polymers (Basel) 2024; 16:1172. [PMID: 38675091 PMCID: PMC11053549 DOI: 10.3390/polym16081172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Revised: 04/16/2024] [Accepted: 04/18/2024] [Indexed: 04/28/2024] Open
Abstract
A series of well-defined diblock copolymers, namely, 3,4-polyisoprene-block-syndiotactic-1,2-polybutadiene (3,4-PI-b-s-1,2-PBD), with a soft-hard block sequence were synthesized via an in situ sequential polymerization process using a robust iron-based catalytic system Fe(acac)3/(isocyanoimino) triptenylphosphorane (IITP)/AliBu3. This catalyst exhibits vigorous activity and temperature tolerance, achieving a polymerization activity of 5.41 × 106 g mol(Fe)-1 h-1 at 70 °C with a [IP]/[Fe] ratio of 15,000. Moreover, the quasi-living polymerization characteristics of the catalyst were verified through kinetic experiments. The first-stage polymerization of isoprene (IP) is performed at 30 °C to give a soft 3,4-PI block, and then a quantitative amount of 1,3-butadiene was added in situ to the quasi-living polymerization system to produce a second hard s-1,2-PBD. The s-1,2-PBD segments in block copolymers display a rodlike morphology contrasting with the spherulitic morphology characteristic of s-1,2-PBD homopolymers. The precise tunability of the length of the soft and hard chain segments of these novel elastic materials with the feed ratio of IP and BD, endowing them with outstanding mechanical properties and excellent dynamic mechanical properties, which are expected to be promising high-performance rubber materials.
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Affiliation(s)
- Yingnan Zhao
- Key Laboratory of Advanced Rubber Material, Ministry of Education, Qingdao University of Science and Technology, Qingdao 266042, China; (Y.Z.); (S.X.); (Y.Y.); (H.L.); (L.N.); (Q.Y.); (X.Z.)
- Shandong Provincial College Laboratory of Rubber Material and Engineering, School of Polymer Science and Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
- Key Lab of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Lab of Rubber-Plastics, School of Polymer Science and Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
| | - Shiliang Xu
- Key Laboratory of Advanced Rubber Material, Ministry of Education, Qingdao University of Science and Technology, Qingdao 266042, China; (Y.Z.); (S.X.); (Y.Y.); (H.L.); (L.N.); (Q.Y.); (X.Z.)
- Shandong Provincial College Laboratory of Rubber Material and Engineering, School of Polymer Science and Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
- Key Lab of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Lab of Rubber-Plastics, School of Polymer Science and Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
| | - Yao Yu
- Key Laboratory of Advanced Rubber Material, Ministry of Education, Qingdao University of Science and Technology, Qingdao 266042, China; (Y.Z.); (S.X.); (Y.Y.); (H.L.); (L.N.); (Q.Y.); (X.Z.)
- Shandong Provincial College Laboratory of Rubber Material and Engineering, School of Polymer Science and Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
- Key Lab of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Lab of Rubber-Plastics, School of Polymer Science and Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
| | - Heng Liu
- Key Laboratory of Advanced Rubber Material, Ministry of Education, Qingdao University of Science and Technology, Qingdao 266042, China; (Y.Z.); (S.X.); (Y.Y.); (H.L.); (L.N.); (Q.Y.); (X.Z.)
- Shandong Provincial College Laboratory of Rubber Material and Engineering, School of Polymer Science and Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
- Key Lab of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Lab of Rubber-Plastics, School of Polymer Science and Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
| | - Feng Wang
- Key Laboratory of Advanced Rubber Material, Ministry of Education, Qingdao University of Science and Technology, Qingdao 266042, China; (Y.Z.); (S.X.); (Y.Y.); (H.L.); (L.N.); (Q.Y.); (X.Z.)
- Shandong Provincial College Laboratory of Rubber Material and Engineering, School of Polymer Science and Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
- Key Lab of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Lab of Rubber-Plastics, School of Polymer Science and Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
| | - Lihua Na
- Key Laboratory of Advanced Rubber Material, Ministry of Education, Qingdao University of Science and Technology, Qingdao 266042, China; (Y.Z.); (S.X.); (Y.Y.); (H.L.); (L.N.); (Q.Y.); (X.Z.)
- Shandong Provincial College Laboratory of Rubber Material and Engineering, School of Polymer Science and Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
- Key Lab of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Lab of Rubber-Plastics, School of Polymer Science and Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
| | - Qi Yang
- Key Laboratory of Advanced Rubber Material, Ministry of Education, Qingdao University of Science and Technology, Qingdao 266042, China; (Y.Z.); (S.X.); (Y.Y.); (H.L.); (L.N.); (Q.Y.); (X.Z.)
- Shandong Provincial College Laboratory of Rubber Material and Engineering, School of Polymer Science and Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
- Key Lab of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Lab of Rubber-Plastics, School of Polymer Science and Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
| | - Chunyu Zhang
- Key Laboratory of Advanced Rubber Material, Ministry of Education, Qingdao University of Science and Technology, Qingdao 266042, China; (Y.Z.); (S.X.); (Y.Y.); (H.L.); (L.N.); (Q.Y.); (X.Z.)
- Shandong Provincial College Laboratory of Rubber Material and Engineering, School of Polymer Science and Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
- Key Lab of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Lab of Rubber-Plastics, School of Polymer Science and Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
| | - Xuequan Zhang
- Key Laboratory of Advanced Rubber Material, Ministry of Education, Qingdao University of Science and Technology, Qingdao 266042, China; (Y.Z.); (S.X.); (Y.Y.); (H.L.); (L.N.); (Q.Y.); (X.Z.)
- Shandong Provincial College Laboratory of Rubber Material and Engineering, School of Polymer Science and Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
- Key Lab of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Lab of Rubber-Plastics, School of Polymer Science and Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
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Hao X, Liu JK, Zhuo W, Zheng J, Hao XQ, Gong JF, Jiang H, Song MP. Synthesis, Characterization, and Catalytic Behaviors in Isoprene Polymerization of Pyridine-Oxazoline-Ligated Cobalt Complexes. Polymers (Basel) 2024; 16:578. [PMID: 38475262 DOI: 10.3390/polym16050578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2024] [Revised: 02/03/2024] [Accepted: 02/07/2024] [Indexed: 03/14/2024] Open
Abstract
A family of pyridine-oxazoline-ligated cobalt complexes L2CoCl23a-h were synthesized and characterized. Determined via single-crystal X-ray diffraction, complexes 3a and 3d, ligated by two ligands, displayed a distorted tetrahedral coordination of a cobalt center. The X-ray structure indicated the pyridine-oxazoline ligands acted as unusual mono-dentate ligands by coordinating only to Noxazoline. Upon activation with AlEt2Cl (diethylaluminum chloride), these cobalt complexes all exhibited high catalytic activity (up to 2.5 × 106 g·molCo-1·h-1), affording cis-1,4-co-3,4-polyisoprene with molecular weights of 4.4-176 kg mol-1 and a narrow Ð of 1.79-3.42, suggesting a single-site nature of the active sites. The structure of cobalt catalysts and reaction parameters, especially co-catalysts and the reaction temperature, all have significant influence on the polymerization activity but not on the microstructure of polyisoprene.
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Affiliation(s)
- Xiuge Hao
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Jin-Kui Liu
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Weize Zhuo
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Jiajing Zheng
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Xin-Qi Hao
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Jun-Fang Gong
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Hui Jiang
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Mao-Ping Song
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
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Yousuf N, Ma Y, Mahmood Q, Zhang W, Wang Y, Saeed H, Sun WH. Enhancing isoprene polymerization with high activity and adjustable monomer enchainment using cyclooctyl-fused iminopyridine iron precatalysts. Dalton Trans 2024; 53:753-764. [PMID: 38086665 DOI: 10.1039/d3dt03674j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
In this study, a series of structurally rigid cyclooctyl-fused iminopyridine iron complexes, [L2FeCl][FeCl4] and [2L3Fe][Cl][3FeCl4], was synthesized via a one-pot method and investigated as precatalysts in conjunction with methylaluminoxane for isoprene (Ip) polymerization. Combined characterization through FTIR analysis, elemental analysis and single crystal XRD analysis fully verified the structure of these complexes. The most active iron complex, FeH, exhibited a trisligated nature, with its cation adopting an octahedral geometry around the metal center. In contrast, all the other iron complexes (Fe2Me, Fe2Et, Fe2iPr, Fe3Me, Fe2Et,Me) displayed bisligated configurations, with distorted trigonal bipyramidal geometry of cations. During isoprene polymerization, the extent of steric hindrance of the ligand framework exerted a significant impact on catalytic performance. The FeH precatalyst with less steric hindrance demonstrated excellent performance, producing high molecular weight polyisoprenes with conversions exceeding 99% for 4000 equiv. of monomer. Even at very low catalyst loadings, as low as 0.0025 mol% (Fe/Ip), the polymerization of isoprene could proceed smoothly with an exceptionally high activity of 4.0 × 106 gPI (molFe, h)-1. Moreover, this precatalyst exhibited good thermal stability, maintaining high activity levels (typically 105 gPI (molFe, h)-1) across a broad temperature range from -20 °C to 100 °C. Additionally, by adjusting steric substituents and the reaction temperature, the 1,4/3,4 regioselectivity could be modulated from 9/91 to 69/31 while maintaining a high stereoselectivity of cis-1,4 structures (cis/trans: >99/1).
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Affiliation(s)
- Nighat Yousuf
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
- Chemistry and Chemical Engineering Guangdong Laboratory, Shantou 515031, China.
- CAS Research/Education Center for Excellence in Molecular Sciences and International School, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yanping Ma
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
| | - Qaiser Mahmood
- Chemistry and Chemical Engineering Guangdong Laboratory, Shantou 515031, China.
| | - Wenjuan Zhang
- Beijing Key Laboratory of Clothing Materials R&D and Assessment, School of Materials Science and Engineering, Beijing Institute of Fashion Technology, Beijing 100029, China.
| | - Yizhou Wang
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
- CAS Research/Education Center for Excellence in Molecular Sciences and International School, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hassan Saeed
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
- Chemistry and Chemical Engineering Guangdong Laboratory, Shantou 515031, China.
- CAS Research/Education Center for Excellence in Molecular Sciences and International School, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wen-Hua Sun
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
- Chemistry and Chemical Engineering Guangdong Laboratory, Shantou 515031, China.
- CAS Research/Education Center for Excellence in Molecular Sciences and International School, University of Chinese Academy of Sciences, Beijing 100049, China
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Du Y, Gao S, Ma H, Lu S, Zhang Z, Zhao M. Catalytic Behavior of Cobalt Complexes Bearing Pyridine-Oxime Ligands in Isoprene Polymerization. Polymers (Basel) 2023; 15:4660. [PMID: 38139912 PMCID: PMC10871112 DOI: 10.3390/polym15244660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 11/29/2023] [Accepted: 12/06/2023] [Indexed: 12/24/2023] Open
Abstract
Several cobalt(II) complexes Co1-Co3 bearing pyridine-oxime ligands (L1 = pyridine-2-aldoxime for Co1; L2 = 6-methylpyridine-2-aldoxime for Co2; L3 = phenyl-2-pyridylketoxime for Co3) and picolinaldehyde O-methyl oxime (L4)-supported Co4 were synthesized and well characterized by FT-IR, mass spectrum and elemental analysis. The single-crystal X-ray diffraction of complex Co2 reveals that the cobalt center of CoCl2 is coordinated with two 6-methylpyridine-2-aldoxime ligands binding with Npyridine and Noxime atoms, which feature a distorted octahedral structure. These Co complexes Co1-Co4 displayed extremely high activity toward isoprene polymerization upon activation with small amount of AlClEt2 in toluene, giving polyisoprene with high activity up to 16.3 × 105 (mol of Co)-1(h)-1. And, the generated polyisoprene displayed high molecular weights and narrow molecular distribution with a cis-1,4-enriched selectivity. The type of cobalt complexes, cocatalyst and reaction temperature all have effects on the polymerization activity but not on the microstructure of polymer.
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Affiliation(s)
- Yuanxu Du
- School of Chemistry and Chemical Engineering, Linyi University, Linyi 276000, China; (Y.D.); (S.G.); (H.M.); (S.L.)
- College of Agriculture and Forestry, Linyi University, Linyi 276000, China
| | - Shuo Gao
- School of Chemistry and Chemical Engineering, Linyi University, Linyi 276000, China; (Y.D.); (S.G.); (H.M.); (S.L.)
| | - Hui Ma
- School of Chemistry and Chemical Engineering, Linyi University, Linyi 276000, China; (Y.D.); (S.G.); (H.M.); (S.L.)
| | - Siqi Lu
- School of Chemistry and Chemical Engineering, Linyi University, Linyi 276000, China; (Y.D.); (S.G.); (H.M.); (S.L.)
| | - Zhenhua Zhang
- School of Chemistry and Chemical Engineering, Linyi University, Linyi 276000, China; (Y.D.); (S.G.); (H.M.); (S.L.)
| | - Mengmeng Zhao
- School of Chemistry and Chemical Engineering, Linyi University, Linyi 276000, China; (Y.D.); (S.G.); (H.M.); (S.L.)
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Zheng N, Liu J, Li Z, Lu J, Ni Y, Min X. Synthesis of block copolymer with cis-1,4-polybutadiene and isotactic-rich polystyrene using α-diimine nickel catalysts. ROYAL SOCIETY OPEN SCIENCE 2023; 10:230791. [PMID: 37859835 PMCID: PMC10582592 DOI: 10.1098/rsos.230791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 09/12/2023] [Indexed: 10/21/2023]
Abstract
A series of styrene-butadiene di-block copolymers with high cis-1,4 unit content (greater than 92%) polybutadiene (PB) and isotactic-rich polystyrene (PS) (mmmm > 65%) was synthesized using α-diimine nickel catalysts (Ni-diimine). Four different Ni-diimine catalysts were synthesized via a complexing reaction between nickel (II) naphthenate and laboratory-made α-diimine ligands L1, L2, L3 and L4, which have different steric volume structures. The results indicate that the Ni-diimine catalyst prepared using the L4 ligand with a higher steric volume can effectively initiate the block polymerization of butadiene and styrene, and the resulting polymer has distinguished cis-1,4 structure unit PB and high isotactic-selective PS block. Differential scanning calorimetry and electrochemical performance tests show that these block copolymers with cis-1,4-regulated and isotactic-selective polymerization have advantages in terms of high-temperature and low-temperature resistance as well as corrosion resistance. Therefore, these copolymers are expected to be widely used in some harsh industrial environments.
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Affiliation(s)
- Nan Zheng
- Shaanxi Key Laboratory of Catalysis, College of Chemical and Environmental Science, Shaanxi University of Technology, Hanzhong, Shaanxi 723001, People's Republic of China
| | - Jie Liu
- Shaanxi Key Laboratory of Catalysis, College of Chemical and Environmental Science, Shaanxi University of Technology, Hanzhong, Shaanxi 723001, People's Republic of China
| | - Zonglin Li
- Shaanxi Key Laboratory of Catalysis, College of Chemical and Environmental Science, Shaanxi University of Technology, Hanzhong, Shaanxi 723001, People's Republic of China
| | - Jiufu Lu
- Shaanxi Key Laboratory of Catalysis, College of Chemical and Environmental Science, Shaanxi University of Technology, Hanzhong, Shaanxi 723001, People's Republic of China
| | - Yan Ni
- Yuzhang Normal University, Nanchang, Jiangxi 330103, People's Republic of China
| | - Xin Min
- College of Chemistry and Environmental Engineering, Jiujiang University, Jiujiang, Jiangxi 332005, People's Republic of China
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Ricci G, Leone G, Zanchin G, Sommazzi A, Masi F, Forni A. Cobalt dichloride complexes with pyridyl-phosphine bidentate ligands: synthesis, characterization, and behavior in the polymerization of 1,3-butadiene. Inorganica Chim Acta 2023. [DOI: 10.1016/j.ica.2023.121424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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Ricci G, Leone G, Zanchin G, Masi F, Guelfi M, Pampaloni G. Dichloro(2,2'-bipyridine)copper/MAO: An Active and Stereospecific Catalyst for 1,3-Diene Polymerization. Molecules 2023; 28:molecules28010374. [PMID: 36615567 PMCID: PMC9822443 DOI: 10.3390/molecules28010374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 12/23/2022] [Accepted: 12/28/2022] [Indexed: 01/03/2023] Open
Abstract
Dichloro(2,2'-bipyridine)copper was synthesized by reacting copper dichloride with bypyridine, and its behavior, in combination with methylaluminoxane (MAO), in the polymerization of butadiene, isoprene, 2,3-dimethyl-1,3 butadiene, and 3-methyl-1,3-pentadiene was examined. The purpose of this study is to find catalytic systems that are more sustainable than those currently used for the polymerization of butadiene and isoprene (e.g., Co and Ni), but that are comparable in terms of catalytic activity and selectivity. Predominantly, syndiotactic 1,2 polybutadiene, crystalline syndiotactic 3,4 polyisoprene, crystalline syndiotactic 1,2 poly(3-methyl-1,3-pentadiene), and crystalline cis-1,4 poly(2,3-dimethyl-1,3-butadiene) were obtained in a manner similar to that observed with the analogous iron complex. As far as we know, the investigated catalytic system represents the first example of a copper-based catalyst in the field of stereospecific polymerization. Given the great availability of copper, its extremely low toxicity (and therefore high sustainability), and the similarity of its behavior to that of iron, the result obtained seems to us of considerable interest and worthy of further investigation.
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Affiliation(s)
- Giovanni Ricci
- CNR—Istituto di Scienze e Tecnologie Chimiche “Giulio Natta” (SCITEC), Via A. Corti 12, I-20133 Milano, Italy
- Correspondence:
| | - Giuseppe Leone
- CNR—Istituto di Scienze e Tecnologie Chimiche “Giulio Natta” (SCITEC), Via A. Corti 12, I-20133 Milano, Italy
| | - Giorgia Zanchin
- CNR—Istituto di Scienze e Tecnologie Chimiche “Giulio Natta” (SCITEC), Via A. Corti 12, I-20133 Milano, Italy
| | - Francesco Masi
- Scientific Advisor, Via Galvani 7, I-26866 Sant’Angelo Lodigiano, Italy
| | - Massimo Guelfi
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Moruzzi 13, I-56124 Pisa, Italy
| | - Guido Pampaloni
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Moruzzi 13, I-56124 Pisa, Italy
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PNP-Ligated Rare-Earth Metal Catalysts for Efficient Polymerization of Isoprene. Catalysts 2022. [DOI: 10.3390/catal12101131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The tridentate PNP ligand-supported rare-earth metal complexes, i.e., bis[o-diphenylphosphinophenyl]amido-Re-bis[o-dimethylaminobenzyl], [(Ph2P-o-C6H4)2N]Re[(CH2-o-Me2N(C6H4))2]: (Re = Y, 1; Nd, 2; Gd, 3) were applied to isoprene polymerization. When activated with borate activator ([PhMe2NH][B(C6F5)4] (NH-BARF), catalysts 1 and 3 exhibited excellent catalytic efficiency in aromatic media, produced very-high to ultrahigh molecular weight (Mw over 130 × 104 g/moL) polyisoprene rubber (PIR), and the obtained PIR contained over 98% cis-1,4 head-to-tail repeating unites. In most cases, the borate-activated polymerization reaction proceeded in a quasi-living pattern (PDI = 1.2–1.5) under controlled monomer conversion; whereas, activated with the commercially available modified methylaluminoxane (MMAO3A) in aliphatic hydrocarbon media, complexes 1, 2 and 3 all showed high catalytic efficiency, produced high molecular weight PIR with narrow molecular weight distribution (PDI ≤ 2.0) and high cis-1,4 head-to tail repeating unites in the range of 91–95%. Thus, the catalyst systems that consisted of 1, 2 and 3/MMAO3A, are closely relevant to the current industrial polybutadiene rubber (PBR) and PIR production processes.
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Chen Z, Xu X, Zhou Y, Liu H, Cui S, Gong D. Fe‐based catalyst with diphenylphosphite as donor for stereopolymerization of butadiene, isoprene, and myrcene. J Appl Polym Sci 2022. [DOI: 10.1002/app.53127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Zhiyan Chen
- Technology Center China Tobacco Guangxi Industrial Co, Ltd. Nanning People's Republic of China
| | - Xueqin Xu
- Technology Center China Tobacco Guangxi Industrial Co, Ltd. Nanning People's Republic of China
| | - Yun Zhou
- Technology Center China Tobacco Guangxi Industrial Co, Ltd. Nanning People's Republic of China
| | - Huijie Liu
- Technology Center China Tobacco Guangxi Industrial Co, Ltd. Nanning People's Republic of China
| | - Sheng Cui
- Technology Center China Tobacco Guangxi Industrial Co, Ltd. Nanning People's Republic of China
| | - Dirong Gong
- Faculty of Materials Science and Chemical Engineering Ningbo University Ningbo People's Republic of China
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Synthesis, Characterization and Catalytic Property Studies for Isoprene Polymerization of Iron Complexes Bearing Unionized Pyridine-Oxime Ligands. Polymers (Basel) 2022; 14:polym14173612. [PMID: 36080685 PMCID: PMC9459928 DOI: 10.3390/polym14173612] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 08/26/2022] [Accepted: 08/27/2022] [Indexed: 11/17/2022] Open
Abstract
Iron complexes of the types [Fe(HL)2Cl2] (Fe1: HL1 = pyridine-2-aldoxime; Fe2: HL2 = 6-methylpyridine-2-aldoxime; Fe3: HL3 = phenyl-2-pyridylketoxime; Fe4: HL4 = picolinaldehyde O-methyl oxime) were prepared and characterized by elemental analysis and IR spectroscopy. The crystal structure of Fe2, determined by single-crystal X-ray diffraction, featured a distorted octahedral coordination of the iron center binding with two ligands of HL2. The X-ray structure and infrared spectral data indicated that pyridine-oxime ligands act as unionized bidentate ligand by coordinating with Npyridine and Noxime. The catalytic performance for isoprene polymerization, catalyzed by these pyridine-oxime-ligated iron complexes, was examined. For a binary catalytic system combined with MAO, complexes Fe1, Fe3 and Fe4 were found to be highly active (up to 6.5 × 106 g/mol·h) in cis-1,4-alt-3,4 enchained polymerization, with average molecular weights in the range of 60–653 kg/mol and narrow PDI values of 1.7–3.5, even with very low amounts of MAO (Al/Fe = 5). Upon activation with [Ph3C][B(C6F5)4]/AlR3 for the ternary catalytic system, theses complexes showed extremely high activities, as well about 98% yield after 2 min, to afford cis-1,4-alt-3,4-polyisoprene with a molecular weight of 140–420 kg/mol.
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Fang L, Zhao WP, Zhang CY, Zhang XQ, Shen XD, Liu H, Kakuchi T. Highly Efficient and Thermal Robust Cobalt Complexes for 1,3-Butadiene Polymerization. CHINESE JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1007/s10118-022-2758-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Fang L, Wang Y, Liu H, Zhang X, Kakuchi T, Wang X, Shen X. Intra-Ligand H···F Interactions: Non-negligible Forces for Enhancing Thermostability of Cobalt Complexes in 1,3-Butadiene Polymerization. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Liang Fang
- Research Center for Polymer Materials, School of Materials Science and Engineering, Changchun University of Science and Technology, Weixing Road 7989, Jilin 130022, China
| | - Yanqiu Wang
- Research Center for Polymer Materials, School of Materials Science and Engineering, Changchun University of Science and Technology, Weixing Road 7989, Jilin 130022, China
| | - Heng Liu
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, Qing-dao University of Science & Technology, Qingdao 266061, China
| | - Xuequan Zhang
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, Qing-dao University of Science & Technology, Qingdao 266061, China
| | - Toyoji Kakuchi
- Division of Applied Chemistry, Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Hokkaido, Japan
| | - Xiaohua Wang
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, Qing-dao University of Science & Technology, Qingdao 266061, China
| | - Xiande Shen
- Research Center for Polymer Materials, School of Materials Science and Engineering, Changchun University of Science and Technology, Weixing Road 7989, Jilin 130022, China
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13
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Tang F, Gong D. Polymerization of butadiene, isoprene and 1-substituted dienes using cobalt catalysts. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.121011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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14
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Liu L, Wang F, Zhang C, Liu H, Zhang X, Wu G. Selectivity diversity for a single cobalt(II) precatalyst mediated butadiene polymerization. REACT FUNCT POLYM 2022. [DOI: 10.1016/j.reactfunctpolym.2022.105295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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15
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Liu L, Wang F, Zhang C, Liu H, Wu G, Zhang X. Thermally robust α-diimine nickel and cobalt complexes for Cis-1,4 selective 1,3-butadiene polymerizations. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2021.112044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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16
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Lianrong F, Yan-Bing W, Hui J, Xin-Qi H, Mao-Ping S. Applications of Cobalt Complexes in Olefin Polymerization. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202204036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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17
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Ricci G, Leone G, Zanchin G, Palucci B, Boccia AC, Sommazzi A, Masi F, Zacchini S, Guelfi M, Pampaloni G. Highly Stereoregular 1,3-Butadiene and Isoprene Polymers through Monoalkyl- N-Aryl-Substituted Iminopyridine Iron Complex-Based Catalysts: Synthesis and Characterization. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01291] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Giovanni Ricci
- CNR-Istituto di Scienze e Tecnologie Chimiche “Giulio Natta” (SCITEC), via A. Corti 12, I-20133 Milano, Italy
| | - Giuseppe Leone
- CNR-Istituto di Scienze e Tecnologie Chimiche “Giulio Natta” (SCITEC), via A. Corti 12, I-20133 Milano, Italy
| | - Giorgia Zanchin
- CNR-Istituto di Scienze e Tecnologie Chimiche “Giulio Natta” (SCITEC), via A. Corti 12, I-20133 Milano, Italy
| | - Benedetta Palucci
- CNR-Istituto di Scienze e Tecnologie Chimiche “Giulio Natta” (SCITEC), via A. Corti 12, I-20133 Milano, Italy
| | - Antonella Caterina Boccia
- CNR-Istituto di Scienze e Tecnologie Chimiche “Giulio Natta” (SCITEC), via A. Corti 12, I-20133 Milano, Italy
| | - Anna Sommazzi
- Versalis S.P.A.─Centro Ricerca Novara, Via G. Fauser 4, I-28100 Novara, Italy
| | - Francesco Masi
- Versalis S.p.A.─R&D Partner Catalysis, Piazza Boldrini 1, I-20097 San Donato Milanese, Italy
| | - Stefano Zacchini
- Università di Bologna, Dipartimento di Chimica Industriale “Toso Montanari”, Viale Risorgimento 4, I-40136 Bologna, Italy
| | - Massimo Guelfi
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Moruzzi 13, I-56124 Pisa, Italy
| | - Guido Pampaloni
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Moruzzi 13, I-56124 Pisa, Italy
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18
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Wang B, Liu H, Tang T, Zhang X. cis-1,4 Selective Coordination Polymerization of 1,3-Butadiene and Copolymerization with Polar 2-(4-Methoxyphenyl)-1,3-butadiene by Acenaphthene-Based α-Diimine Cobalt Complexes Featuring Intra-Ligand π-π Stacking Interactions. Polymers (Basel) 2021; 13:3329. [PMID: 34641145 PMCID: PMC8512132 DOI: 10.3390/polym13193329] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 09/22/2021] [Accepted: 09/22/2021] [Indexed: 12/03/2022] Open
Abstract
Highly cis-1,4 selective (up to 98%) coordination-insertion polymerization of 1,3-butadiene (BD) has been achieved herein using acenaphthene-based α-diimine cobalt complexes. Due to the presence of intra-ligand π-π stacking interactions, the complexes revealed high thermostability, affording polybutadiene products in high yields. Moreover, all of the obtained polymers possessed a relatively narrow molecular weight distribution as well as high molecular weight (up to 92.2 × 104 Dalton). The molecular weights of the resultant polybutadienes could be finely tuned by varying polymerization parameters, including temperature, Al/Co ratio, etc. Moreover, the copolymerization of butadiene with polar monomer 2-(4-methoxyphenyl)-1,3-butadiene (2-MOPB) was also successfully realized to produce a type of polar cis-1,4 polybutadiene (cis-1,4 content: up to 98.1%) with a range of 2-MOPB content (0.46-1.83%). Water contact angle measurements indicated that the insertion of a polar monomer into a polymer chain could significantly improve the polymer's surface property.
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Affiliation(s)
- Beibei Wang
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, China; (B.W.); (T.T.)
- Changchun Institute of Applied Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Heng Liu
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao University of Science & Technology, Qingdao 266042, China;
| | - Tao Tang
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, China; (B.W.); (T.T.)
- Changchun Institute of Applied Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Xuequan Zhang
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao University of Science & Technology, Qingdao 266042, China;
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19
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Jiu AY, Slocumb HS, Yeung CS, Yang XH, Dong VM. Enantioselective Addition of Pyrazoles to Dienes*. Angew Chem Int Ed Engl 2021; 60:19660-19664. [PMID: 34145705 PMCID: PMC8889753 DOI: 10.1002/anie.202105679] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 05/31/2021] [Indexed: 11/05/2022]
Abstract
We report the first enantioselective addition of pyrazoles to 1,3-dienes. Secondary and tertiary allylic pyrazoles can be generated with excellent regioselectivity. Mechanistic studies support a pathway distinct from previous hydroaminations: a Pd0 -catalyzed ligand-to-ligand hydrogen transfer (LLHT). This hydroamination tolerates a range of functional groups and advances the field of diene hydrofunctionalization.
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Affiliation(s)
- Alexander Y Jiu
- Department of Chemistry, University of California, Irvine, Irvine, CA, 92697, USA
| | - Hannah S Slocumb
- Department of Chemistry, University of California, Irvine, Irvine, CA, 92697, USA
| | - Charles S Yeung
- Discovery Chemistry, Merck & Co., Inc., Boston, MA, 02115, USA
| | - Xiao-Hui Yang
- Advanced Research Institute of Multidisciplinary Science, and School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, China
| | - Vy M Dong
- Department of Chemistry, University of California, Irvine, Irvine, CA, 92697, USA
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20
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Jiu AY, Slocumb HS, Yeung CS, Yang X, Dong VM. Enantioselective Addition of Pyrazoles to Dienes**. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202105679] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Alexander Y. Jiu
- Department of Chemistry University of California, Irvine Irvine CA 92697 USA
| | - Hannah S. Slocumb
- Department of Chemistry University of California, Irvine Irvine CA 92697 USA
| | | | - Xiao‐Hui Yang
- Advanced Research Institute of Multidisciplinary Science, and School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing 100081 China
| | - Vy M. Dong
- Department of Chemistry University of California, Irvine Irvine CA 92697 USA
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21
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Fiorito D, Simon M, Thomas CM, Mazet C. Access to Highly Stereodefined 1,4- cis-Polydienes by a [Ni/Mg] Orthogonal Tandem Catalytic Polymerization. J Am Chem Soc 2021; 143:13401-13407. [PMID: 34379408 DOI: 10.1021/jacs.1c06553] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A [Ni/Mg]-catalyzed orthogonal tandem polymerization has been developed starting from enol phosphates. Initial investigations conducted on branched 1,3-dienes as monomers enabled identification of a Mg-initiated polymerization process leading to 1,4-cis-polydienes. When aryl enol phosphates are used as monomers, the [Ni/Mg]-catalyzed tandem polymerization affords 1,4-cis-polydienes with selectivities up to 99%. Elastomeric or crystalline materials were obtained by simple structural modifications of the monomeric unit. This tandem approach appears as a straightforward and efficient way to enforce diversity and selectivity in diene polymerization while retaining a fair degree of control, just as observed for stepwise systems that are accessible through established time- and manpower-consuming synthetic procedures.
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Affiliation(s)
- Daniele Fiorito
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
| | - Malaury Simon
- Chimie ParisTech, PSL University, CNRS, Institut de Recherche de Chimie Paris, 75005 Paris, France
| | - Christophe M Thomas
- Chimie ParisTech, PSL University, CNRS, Institut de Recherche de Chimie Paris, 75005 Paris, France
| | - Clément Mazet
- Department of Organic Chemistry, University of Geneva, 30 quai Ernest Ansermet, 1211 Geneva, Switzerland
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22
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Zhu G, Wang L, Kuang J, Xu G, Zhang Y, Wang Q. High Double Bond Content of Polyisoprene Synthesis via Cationic Polymerization Synergistically Catalyzed by Tf 2NH-Ionic Liquids. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00418] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Guangqian Zhu
- Key Laboratory of Biobased Materials, Qingdao Institute of Bio-energy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Liang Wang
- Key Laboratory of Biobased Materials, Qingdao Institute of Bio-energy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
| | - Jia Kuang
- Key Laboratory of Biobased Materials, Qingdao Institute of Bio-energy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
| | - Guangqiang Xu
- Key Laboratory of Biobased Materials, Qingdao Institute of Bio-energy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yongqiang Zhang
- Key Laboratory of Biobased Materials, Qingdao Institute of Bio-energy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
| | - Qinggang Wang
- Key Laboratory of Biobased Materials, Qingdao Institute of Bio-energy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
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23
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Ricci G, Leone G, Zanchin G, Palucci B, Forni A, Sommazzi A, Masi F, Zacchini S, Guelfi M, Pampaloni G. Some Novel Cobalt Diphenylphosphine Complexes: Synthesis, Characterization, and Behavior in the Polymerization of 1,3-Butadiene. Molecules 2021; 26:molecules26134067. [PMID: 34279407 PMCID: PMC8271660 DOI: 10.3390/molecules26134067] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 06/23/2021] [Accepted: 06/25/2021] [Indexed: 11/24/2022] Open
Abstract
Some novel cobalt diphenylphosphine complexes were synthesized by reacting cobalt(II) chloride with (2-methoxyethyl)diphenylphosphine, (2-methoxyphenyl)diphenylphosphine, and 2-(1,1-dimethylpropyl)-6-(diphenylphosphino)pyridine. Single crystals suitable for X-ray diffraction studies were obtained for the first two complexes, and their crystal structure was determined. The novel compounds were then used in association with methylaluminoxane (MAO) for the polymerization of 1,3-butadiene, and their behavior was compared with that exhibited in the polymerization of the same monomer by the systems CoCl2(PnPrPh2)2/MAO and CoCl2(PPh3)2/MAO. Some significant differences were observed depending on the MAO/Co ratio used, and a plausible interpretation for such a different behavior is proposed.
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Affiliation(s)
- Giovanni Ricci
- CNR—Istituto di Scienze e Tecnologie Chimiche “Giulio Natta” (SCITEC), Via Corti 12, I-20133 Milano, Italy; (G.L.); (G.Z.); (B.P.); (A.F.)
- Correspondence:
| | - Giuseppe Leone
- CNR—Istituto di Scienze e Tecnologie Chimiche “Giulio Natta” (SCITEC), Via Corti 12, I-20133 Milano, Italy; (G.L.); (G.Z.); (B.P.); (A.F.)
| | - Giorgia Zanchin
- CNR—Istituto di Scienze e Tecnologie Chimiche “Giulio Natta” (SCITEC), Via Corti 12, I-20133 Milano, Italy; (G.L.); (G.Z.); (B.P.); (A.F.)
| | - Benedetta Palucci
- CNR—Istituto di Scienze e Tecnologie Chimiche “Giulio Natta” (SCITEC), Via Corti 12, I-20133 Milano, Italy; (G.L.); (G.Z.); (B.P.); (A.F.)
| | - Alessandra Forni
- CNR—Istituto di Scienze e Tecnologie Chimiche “Giulio Natta” (SCITEC), Via Corti 12, I-20133 Milano, Italy; (G.L.); (G.Z.); (B.P.); (A.F.)
| | - Anna Sommazzi
- Versalis S.p.A.—Centro Ricerca Novara, Via Fauser 4, I-28100 Novara, Italy;
| | - Francesco Masi
- Versalis S.p.A.—R&D Partner Catalysis, Piazza Boldrini 1, San Donato Milanese, I-20097 Milano, Italy;
| | - Stefano Zacchini
- Dipartimento di Chimica Industriale ‘‘Toso Montanari’’, Università di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy;
| | - Massimo Guelfi
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Moruzzi 13, I-56124 Pisa, Italy; (M.G.); (G.P.)
| | - Guido Pampaloni
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Moruzzi 13, I-56124 Pisa, Italy; (M.G.); (G.P.)
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24
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Ricci G, Pampaloni G, Sommazzi A, Masi F. Dienes Polymerization: Where We Are and What Lies Ahead. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00004] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Giovanni Ricci
- CNR-Istituto di Scienze e Tecnologie Chimiche “Giulio Natta” (SCITEC), Via A. Corti 12, I-20133 Milano, Italy
| | - Guido Pampaloni
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Moruzzi 13, I-56124 Pisa, Italy
| | - Anna Sommazzi
- Centro Ricerca Novara, Versalis S.p.A., Via G. Fauser 4, I-28100 Novara, Italy
| | - Francesco Masi
- R&D Partner Catalysis, Versalis S.p.A., Piazza Boldrini 1, I-20097 San Donato Milanese (MI), Italy
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25
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Nishii K, Zhou G, Saito Y, Yamamoto A, Nishiura M, Luo Y, Hou Z. Synthesis of Thermoplastic Elastomers by Yttrium-Catalyzed Isospecific Trans-1,4-Polymerization of (E)-1,3-Pentadiene. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20210026] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Kei Nishii
- Organometallic Chemistry Laboratory, RIKEN, Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Department of Materials Chemistry and Bioengineering, National Institute of Technology, Oyama College, 771 Nakakuki, Oyama, Tochigi 323-0806, Japan
| | - Guangli Zhou
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
| | - Yusuke Saito
- Organometallic Chemistry Laboratory, RIKEN, Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Atsushi Yamamoto
- Organometallic Chemistry Laboratory, RIKEN, Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Masayoshi Nishiura
- Organometallic Chemistry Laboratory, RIKEN, Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Yi Luo
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
| | - Zhaomin Hou
- Organometallic Chemistry Laboratory, RIKEN, Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
- Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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26
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Zanchin G, Leone G. Polyolefin thermoplastic elastomers from polymerization catalysis: Advantages, pitfalls and future challenges. Prog Polym Sci 2021. [DOI: 10.1016/j.progpolymsci.2020.101342] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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27
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Hu Z, Xu Y, Hu W, Luo W, Zhao Y, Huang W, Gong D. Synthesis and properties of syndiotactic 1,2‐polybutadiene catalyzed by iron catalyst with phosphate as additive. J Appl Polym Sci 2021. [DOI: 10.1002/app.49686] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Zhonghan Hu
- Faculty of Materials Science and Chemical Engineering Ningbo University Ningbo Zhejiang China
| | - Yuechao Xu
- Faculty of Materials Science and Chemical Engineering Ningbo University Ningbo Zhejiang China
| | - Wenhong Hu
- Faculty of Materials Science and Chemical Engineering Ningbo University Ningbo Zhejiang China
| | - Wanwei Luo
- Faculty of Materials Science and Chemical Engineering Ningbo University Ningbo Zhejiang China
| | - Yu Zhao
- Faculty of Materials Science and Chemical Engineering Ningbo University Ningbo Zhejiang China
| | - Weizhong Huang
- Faculty of Materials Science and Chemical Engineering Ningbo University Ningbo Zhejiang China
| | - Dirong Gong
- Faculty of Materials Science and Chemical Engineering Ningbo University Ningbo Zhejiang China
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun Jilin China
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28
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Hashmi OH, Visseaux M, Champouret Y. Evidence of coordinative chain transfer polymerization of isoprene using iron iminopyridine/ZnEt 2 catalytic systems. Polym Chem 2021. [DOI: 10.1039/d1py00433f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Herein, the first example of a reversible iron-mediated chain transfer polymerisation of isoprene with ZnEt2 as the chain transfer agent is reported.
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Affiliation(s)
- Obaid H. Hashmi
- Univ. Lille, CNRS, Centrale Lille, Univ. Artois, UMR 8181 – UCCS – Unité de Catalyse et de Chimie du Solide, F-59000 Lille, France
| | - Marc Visseaux
- Univ. Lille, CNRS, Centrale Lille, Univ. Artois, UMR 8181 – UCCS – Unité de Catalyse et de Chimie du Solide, F-59000 Lille, France
| | - Yohan Champouret
- Univ. Lille, CNRS, Centrale Lille, Univ. Artois, UMR 8181 – UCCS – Unité de Catalyse et de Chimie du Solide, F-59000 Lille, France
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29
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Liu J, Zheng N, Min X, Liu J, Li Z, Ji X. Synthesis of butadiene/isoprene–styrene di-block copolymer with high cis-1,4 unit content based on a neodymium phosphate ester. RSC Adv 2021; 11:37436-37442. [PMID: 35496400 PMCID: PMC9043828 DOI: 10.1039/d1ra06923c] [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: 09/15/2021] [Accepted: 11/14/2021] [Indexed: 12/04/2022] Open
Abstract
A novel two-step synthesis strategy based on a liquid neodymium phosphate ester (Nd(P507)3) catalyst was used to synthesize diene-styrene di-block copolymers with high cis-1,4 unit content, such as butadiene–styrene (PB-b-PS), isoprene–styrene (PI-b-PS), and so on. The strategy not only makes full use of the high cis-1,4 stereo-selectivity of the rare earth catalyst to conjugated dienes, but also adjusts the electron cloud density of the catalytic active center by introducing triphenyl phosphine (PPh3). Thus, the catalytic activity of the neodymium-based catalyst center toward styrene has been largely improved, and a series of PB/PI-b-PSs with high cis-1,4 unit content (98.3 and 98.1% respectively), narrow molecular weight distribution and controllable block ratio were successfully synthesized. Herein, molecular weight (Mn), molecular weight distribution (Mw/Mn) and microstructure of the block polymers were characterized using SEC-MALLS, FT-IR, 1H NMR, 13C NMR and DSC. The DSC curve of a PB-b-PS with 98.3% cis-1,4 unit and 18.6% polystyrene content shows a Tg of −103.1 °C, which means it has relatively excellent mechanical properties at lower temperature. The results show that these PB/PI-b-PS materials have good application prospects in harsh low temperature environments. A novel synthesis strategy of butadiene/isoprene–styrene di-block copolymer with high cis-1,4 content was explored based on a neodymium phosphate catalyst, by adjusting the electron cloud density of the catalytic active center via triphenyl phosphine.![]()
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Affiliation(s)
- Jie Liu
- Shaanxi Key Laboratory of Catalysis, College of Chemical & Environment Science, Shaanxi University of Technology, Hanzhong, China
| | - Nan Zheng
- Shaanxi Key Laboratory of Catalysis, College of Chemical & Environment Science, Shaanxi University of Technology, Hanzhong, China
| | - Xin Min
- College of Chemistry and Environmental Engineering, Jiujiang University, Jiujiang, China
| | - Junhai Liu
- Shaanxi Key Laboratory of Catalysis, College of Chemical & Environment Science, Shaanxi University of Technology, Hanzhong, China
| | - Zhizhou Li
- Shaanxi Key Laboratory of Catalysis, College of Chemical & Environment Science, Shaanxi University of Technology, Hanzhong, China
| | - Xiaohui Ji
- Shaanxi Key Laboratory of Catalysis, College of Chemical & Environment Science, Shaanxi University of Technology, Hanzhong, China
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30
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Jing C, Wang L, Zhu G, Hou H, Zhou L, Wang Q. Enhancing Thermal Stability in Aminopyridine Iron(II)-Catalyzed Polymerization of Conjugated Dienes. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00591] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Chuyang Jing
- Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
| | - Liang Wang
- Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
| | - Guangqian Zhu
- Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hongbin Hou
- Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
| | - Li Zhou
- Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
| | - Qinggang Wang
- Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
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31
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A computational study of isoprene polymerization catalyzed by iminopyridine-supported iron complexes: Ligand-controlled selectivity. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2020.137811] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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32
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Wang L, Wang X, Hou H, Zhu G, Han Z, Yang W, Chen X, Wang Q. An unsymmetrical binuclear iminopyridine-iron complex and its catalytic isoprene polymerization. Chem Commun (Camb) 2020; 56:8846-8849. [PMID: 32633282 DOI: 10.1039/d0cc04122j] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of chloride-bridged unsymmetrical mixed Fe(ii)-HS/Fe(ii)-LS binuclear structures has been prepared and characterized. Upon activation with MAO, highly efficient catalytic polymerization of isoprene was achieved, delivering an ultra-high molecular weight (catalyst loading = 2.5 ppm, Mn = 1.8 × 106 g mol-1, Mw/Mn = 1.4).
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Affiliation(s)
- Liang Wang
- Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China.
| | - Xiaowu Wang
- Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China.
| | - Hongbin Hou
- Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China.
| | - Guangqian Zhu
- Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China. and Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhenyu Han
- Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China. and Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Weiying Yang
- Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China. and Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiao Chen
- Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China.
| | - Qinggang Wang
- Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China.
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Han JF, Guo P, Zhang XG, Liao JB, Ye KY. Recent advances in cobalt-catalyzed allylic functionalization. Org Biomol Chem 2020; 18:7740-7750. [PMID: 32940308 DOI: 10.1039/d0ob01581d] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Unlike many other state-of-the-art transition-metal-catalyzed allylic substitutions, cobalt-catalyzed allylic substitution has received much less attention from synthetic chemists for a long time despite the fact that cobalt is an earth-abundant, low-cost and thus much more sustainable option as either a reagent or a catalyst in organic synthesis. Recently, there has been an upsurge in the use of cobalt catalysis in allylic functionalization reactions, including allylic substitution, nucleophilic allylation, and Heck-type allylic functionalization, to construct synthetically significant building blocks featuring a double bond available for diverse downstream synthetic manipulations. This review highlights the current development of cobalt catalysis in allylic functionalization with an in-depth discussion of the reaction scope and mechanistic insights.
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Affiliation(s)
- Jun-Fa Han
- Key Laboratory of Molecule Synthesis and Function Discovery (Fujian Province University), College of Chemistry, Fuzhou University, Fuzhou 350108, China.
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34
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Cheng L, Li MM, Wang B, Xiao LJ, Xie JH, Zhou QL. Nickel-catalyzed hydroalkylation and hydroalkenylation of 1,3-dienes with hydrazones. Chem Sci 2019; 10:10417-10421. [PMID: 32110333 PMCID: PMC6988744 DOI: 10.1039/c9sc04177j] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Accepted: 09/19/2019] [Indexed: 12/15/2022] Open
Abstract
Transition-metal-catalyzed hydrofunctionalization of 1,3-dienes is a useful and atom-economical method for constructing allylic compounds. Although substantial progress on hydroalkylation of dienes with stabilized carbon nucleophiles has been made, hydroalkylation of dienes with unstabilized carbon nucleophiles has remained a challenge. In this article, we report a protocol for nickel-catalyzed hydroalkylation of dienes with hydrazones, which serve as equivalents of alkyl carbon nucleophiles. In addition, we developed a protocol for hydroalkenylation of dienes with α,β-unsaturated hydrazones, providing a new method for the synthesis of 1,4-dienes. These hydroalkylation and hydroalkenylation reactions feature mild conditions and a wide substrate scope, and the utility of the reaction products is demonstrated by the preparation of an activator of soluble guanylate cyclase.
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Affiliation(s)
- Lei Cheng
- State Key Laboratory and Institute of Elemento-Organic Chemistry , College of Chemistry , Nankai University , Tianjin 300071 , China .
| | - Ming-Ming Li
- State Key Laboratory and Institute of Elemento-Organic Chemistry , College of Chemistry , Nankai University , Tianjin 300071 , China .
| | - Biao Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry , College of Chemistry , Nankai University , Tianjin 300071 , China .
| | - Li-Jun Xiao
- State Key Laboratory and Institute of Elemento-Organic Chemistry , College of Chemistry , Nankai University , Tianjin 300071 , China .
| | - Jian-Hua Xie
- State Key Laboratory and Institute of Elemento-Organic Chemistry , College of Chemistry , Nankai University , Tianjin 300071 , China .
| | - Qi-Lin Zhou
- State Key Laboratory and Institute of Elemento-Organic Chemistry , College of Chemistry , Nankai University , Tianjin 300071 , China .
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Controlling external diphenylcyclohexylphosphine feeding to achieve cis-1,4-syn-1,2 sequence controlled polybutadienes via cobalt catalyzed 1,3-butadiene polymerization. J Catal 2019. [DOI: 10.1016/j.jcat.2019.07.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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36
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Hashmi OH, Champouret Y, Visseaux M. Highly Active Iminopyridyl Iron-Based Catalysts for the Polymerization of Isoprene. Molecules 2019; 24:molecules24173024. [PMID: 31438501 PMCID: PMC6749290 DOI: 10.3390/molecules24173024] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 07/28/2019] [Accepted: 08/07/2019] [Indexed: 11/17/2022] Open
Abstract
A series of iminopyridyl-based ligands, 6-[(Ar)N=C(R)]-2-C6H5N [(Ar = 2,6-Me2-C6H3, R = Me (L1); Ar = 2,6-iPr2-C6H3, R = Me (L2); Ar = 2,6-Me2-C6H3, R = H (L3); Ar = 2,6-iPr2-C6H3, R = H (L4); Ar = 3,5-(CF3)2-C6H3, R = Me (L5); Ar = C6F5, R = Me (L6)], and their corresponding iron (II) complexes were developed to investigate their application in the controlled coordinative polymerization of isoprene. The modulation of steric and electronic properties within this family of ligands/pre-catalysts has shown to influence the stereo-selectivity and activity of the polymerization of isoprene after activation. Upon activation with various co-catalysts such as AliBu3/[Ph3C][B(C6F5)4], AlEt3/[Ph3C][B(C6F5)4] or MAO, the resulting catalysts produced polyisoprenes with an excellent conversion (>99% of 500–5000 equiv.) within less than 1 h (TOF > 500 h−1) and having a variety of stereo-/regio-regularities. The presence of electron-donating and withdrawing groups drastically impacted the activity and the stereoselectivity of the catalysts during the course of the polymerization of isoprene. When activated with AliBu3/[Ph3C][B(C6F5)4], the complexes {6-[(2,6-Me2-C6H3)N=C(Me)]-2-C6H5N}FeCl2 (C1) and {6-[(2,6-iPr2-C6H3)N=C(Me)]-2-C6H5N}FeCl2 (C2) exhibited moderate trans-1,4 selectivity (>67%) while the iron-based systems bearing related aldiminopyridyl ligands {6-[(2,6-Me2-C6H3)N=C(H)]-2-C6H5N}FeCl2 (C3) and {6-[(2,6-iPr2-C6H3)N=C(H)]-2-C6H5N}FeCl2 (C4) were found to afford significant cis-1,4 selectivity at low temperature (>86% at −40 °C). On the other hand, the ternary {6-[(3,5-(CF3)2-C6H3)N=C(Me)]-2-C6H5N}FeCl2 (C5) or {6-[(C6F5)N=C(Me)]-2-C6H5N}FeCl2 (C6)/AliBu3/[Ph3C][B(C6F5)4] catalytic combinations showed exceptional activity for the polymerization of isoprene (TOF > 1,000,000 h−1), albeit providing less stereoselectivity.
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Affiliation(s)
- Obaid H Hashmi
- UMR 8181-UCCS-Unité de Catalyse et de Chimie du Solide, ENSCL, Centrale Lille, University of Artois, University of Lille, CNRS, F-59000 Lille, France
| | - Yohan Champouret
- UMR 8181-UCCS-Unité de Catalyse et de Chimie du Solide, ENSCL, Centrale Lille, University of Artois, University of Lille, CNRS, F-59000 Lille, France.
| | - Marc Visseaux
- UMR 8181-UCCS-Unité de Catalyse et de Chimie du Solide, ENSCL, Centrale Lille, University of Artois, University of Lille, CNRS, F-59000 Lille, France.
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Zhang F, Yi W, Zhang J, You Q, Weng L, Zhou X. Oxidation and chalcogenylative disproportionation of anionic phosphide ligands in yttrium complexes with elemental sulfur and selenium. Dalton Trans 2019; 48:10596-10603. [PMID: 31218302 DOI: 10.1039/c9dt01537j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The oxidation and disproportionation of anionic phosphide ligands in yttrium complexes with elemental sulfur and selenium are reported. The mixed TpMe2/Cp supported yttrium phosphide complex TpMe2CpYPPh2(THF) (1) reacted with one equiv. of elemental S or Se in THF at room temperature to deliver two structurally characterized yttrium dithio- or monoseleno-phosphinates TpMe2CpYS2PPh2(THF) (2) and TpMe2CpYSePPh2(THF) (4Se), respectively. Further investigations showed that the yttrium thiophosphinate TpMe2CpYSPPh2(THF) (4S) can be isolated from the reactions of 2 and 1 or 1 and elemental S in a short reaction time. Moreover, after keeping 4S or 4Se in THF solution for some days, 2 or [(TpMe2)2Y]+[Se2PPh2]- (5) was obtained by a disproportionation process. The mechanism for the construction of the Ph2PE- and Ph2PE2- (E = S, Se) ligands has been discussed based on the in situ NMR experiments and some designed reactions.
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Affiliation(s)
- Fangjun Zhang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People's Republic of China.
| | - Weiyin Yi
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People's Republic of China.
| | - Jie Zhang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People's Republic of China.
| | - Qing You
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People's Republic of China.
| | - Linhong Weng
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People's Republic of China.
| | - Xigeng Zhou
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People's Republic of China.
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Zhao M, Mahmood Q, Jing C, Wang L, Zhu G, Zhang X, Wang Q. Isoprene Polymerization: Catalytic Performance of Iminopyridine Vanadium(III) Chloride versus Vanadium(III) Chloride. Polymers (Basel) 2019; 11:polym11071122. [PMID: 31269642 PMCID: PMC6681085 DOI: 10.3390/polym11071122] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 06/07/2019] [Accepted: 06/18/2019] [Indexed: 01/23/2023] Open
Abstract
A series of vanadium complexes bearing iminopyridine bidentate ligands with various electronic and steric properties: V1 [CH2Ph], V2 [CMe2CH2CMe3], V3 [Ph] and V4 [2,6-iPr2Ph] were prepared and characterized by IR spectroscopy and microanalytical analysis. The catalytic capacity of all the complexes has been investigated for isoprene polymerization and was controlled by tuning the ligand structure with different N-alkyl and N-aryl groups. Activated by methylaluminoxane (MAO), the aryl-substituted complex V3 [Ph] exhibited high cis-1,4 selectivity (75%), and the resultant polymers had high molecular weights (Mn = 6.6 × 104) and narrow molecular weight distributions (PDI = 2.3). This catalyst showed high activity up to 734.4 kg polymer (mol V)−1 h−1 with excellent thermostability even stable at 70 °C. Compared to the traditional VCl3/MAO catalytic system, iminopyridine-supported V(III) catalysts displayed higher catalytic activities and changed the selectivity of monomer enchainment from trans-1,4 to cis-1,4.
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Affiliation(s)
- Mengmeng Zhao
- Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266000, China
| | - Qaiser Mahmood
- Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266000, China
| | - Chuyang Jing
- Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266000, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Liang Wang
- Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266000, China
| | - Guangqian Zhu
- Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266000, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xianhui Zhang
- Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266000, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qinggang Wang
- Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266000, China.
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China.
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39
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Champouret Y, Hashmi OH, Visseaux M. Discrete iron-based complexes: Applications in homogeneous coordination-insertion polymerization catalysis. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.03.015] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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40
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Yousefi A, Sabounchei SJ, Moazzami Farida SH, Karamian R, Rahmani N, Gable RW. Different properties of P,C-donor Pd(II) and Pt(II); spectroscopic and X-ray analysis, catalytic potential and anti-proliferative potency. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2019.03.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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41
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Novel Cobalt Dichloride Complexes with Hindered Diphenylphosphine Ligands: Synthesis, Characterization, and Behavior in the Polymerization of Butadiene. Molecules 2019; 24:molecules24122308. [PMID: 31234454 PMCID: PMC6630202 DOI: 10.3390/molecules24122308] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 06/13/2019] [Accepted: 06/19/2019] [Indexed: 11/17/2022] Open
Abstract
Two novel cobalt diphenylphosphine complexes were synthesized by reacting cobalt(II) chloride with tert-butyl(diphenyl)phosphine (PtBuPh2) and (S)-(+)neomenthyldiphenylphosphine [(S)-NMDPP]. The crystal structure of the former was determined by single-crystal X-ray diffraction studies. The two complexes were then used in combination with methylaluminoxane (MAO) for the polymerization of 1,3-butadiene: crystalline highly syndiotactic 1,2 poly(1,3-butadiene)s were obtained, with a 1,2 content and a syndiotactic index (percentage of syndiotactic triads [rr]) up to 95% and 85%, respectively. The results obtained further support and confirm what was already observed in the polymerization of 1,3-butadiene with CoCl2(PRPh2)2-MAO (R = methyl, ethyl, normal-propyl, iso-propyl, and cyclohexyl): the nature of the phosphine ligand strongly affects the polymerization stereoselectivity, the polymer syndiotacticity increasing with increasing phosphine ligand steric hindrance.
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42
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Tanaka R, Ikeda K, Nakayama Y, Shiono T. Cis-1,4 Specific Polymerization of 1,3-Butadiene Using PNP-pincer Ligated Iron(II) Complexes. CHEM LETT 2019. [DOI: 10.1246/cl.190115] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ryo Tanaka
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-hiroshima, Hiroshima 739-8527, Japan
| | - Kenshi Ikeda
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-hiroshima, Hiroshima 739-8527, Japan
| | - Yuushou Nakayama
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-hiroshima, Hiroshima 739-8527, Japan
| | - Takeshi Shiono
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-hiroshima, Hiroshima 739-8527, Japan
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43
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Wang F, Liu H, Hu Y, Zhang X. Influence of imine‐
carbon
substituent in 6‐bromo‐2‐iminopyridine‐based cobalt(II) complexes on 1,3‐butadiene polymerization. POLYM INT 2019. [DOI: 10.1002/pi.5854] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Feng Wang
- School of Chemical EngineeringChangchun University of Technology Changchun Jilin China
| | - Heng Liu
- CAS Key Laboratory of High‐Performance Synthetic Rubber and its Composite MaterialsChangchun Institute of Applied Chemistry, Chinese Academy of Sciences Changchun Jilin China
| | - Yanming Hu
- CAS Key Laboratory of High‐Performance Synthetic Rubber and its Composite MaterialsChangchun Institute of Applied Chemistry, Chinese Academy of Sciences Changchun Jilin China
| | - Xuequan Zhang
- CAS Key Laboratory of High‐Performance Synthetic Rubber and its Composite MaterialsChangchun Institute of Applied Chemistry, Chinese Academy of Sciences Changchun Jilin China
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44
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Liu J, Min X, Zhang X, Zhu X, Wang Z, Wang T, Fan X. A novel synthetic strategy for styrene-butadiene-styrene tri-block copolymer with high cis-1,4 units via changing catalytic active centres. ROYAL SOCIETY OPEN SCIENCE 2019; 6:190536. [PMID: 31312502 PMCID: PMC6599772 DOI: 10.1098/rsos.190536] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Accepted: 05/22/2019] [Indexed: 06/10/2023]
Abstract
A styrene-butadiene-styrene tri-block copolymer (SBS) with a high cis-1,4 unit content (greater than 97%) was synthesized by a novel synthetic strategy based on changing the catalytic active centres using n-butyllithium and a nickel-based catalyst. Firstly, styrene was polymerized via anionic polymerization using butyllithium as the initiator (Li, activity centre Li) at 50°C. The obtained alkylated macroinitiator (PSLi) was aged with nickel naphthenate (Ni) and boron trifluoride etherate (B) to prepare a second reactive centre (Ni-F), which was used to initiate the polymerization of butadiene (Bd). Finally, triphenyl phosphine (PPh3) was added to adjust the electron density of the third active centre (P-Ni-F), and styrene monomer was added again to synthesize the second polystyrene block to obtain SBS. The polymerization technique presented here is simple and has an efficient initiation effect due to the high initiation activities for the different monomers. It also exhibits excellent control over the stereo-structure of the butadiene segments in the prepared copolymers, and the SBS polymers with high cis-1,4 unit content were easily achieved.
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Affiliation(s)
- Jie Liu
- Ministry of Education and Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Science, Northwestern Polytechnical University, Xi'an, Shaanxi 710129, People's Republic of China
- School of Materials Science and Engineering, Shaanxi Province Key Laboratory of Catalytic Foundation and Application, Shaanxi University of Technology, Hanzhong, Shaanxi 723001, People's Republic of China
| | - Xin Min
- Ministry of Education and Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Science, Northwestern Polytechnical University, Xi'an, Shaanxi 710129, People's Republic of China
| | - Xuan Zhang
- Ministry of Education and Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Science, Northwestern Polytechnical University, Xi'an, Shaanxi 710129, People's Republic of China
| | - Xiuzhong Zhu
- Ministry of Education and Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Science, Northwestern Polytechnical University, Xi'an, Shaanxi 710129, People's Republic of China
| | - Zichao Wang
- Ministry of Education and Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Science, Northwestern Polytechnical University, Xi'an, Shaanxi 710129, People's Republic of China
| | - Tong Wang
- Ministry of Education and Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Science, Northwestern Polytechnical University, Xi'an, Shaanxi 710129, People's Republic of China
| | - Xiaodong Fan
- Ministry of Education and Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Science, Northwestern Polytechnical University, Xi'an, Shaanxi 710129, People's Republic of China
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Zanchin G, Gavezzoli A, Bertini F, Ricci G, Leone G. Homo- and Copolymerization of Ethylene with Norbornene Catalyzed by Vanadium(III) Phosphine Complexes. Molecules 2019; 24:molecules24112088. [PMID: 31159332 PMCID: PMC6600629 DOI: 10.3390/molecules24112088] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 05/29/2019] [Accepted: 05/30/2019] [Indexed: 11/16/2022] Open
Abstract
Herein, we report the homo- and co-polymerization of ethylene (E) with norbornene (NB) catalyzed by vanadium(III) phosphine complexes of the type VCl3(PMenPh3-n)2 [n = 2 (1a), 1 (1b)] and VCl3(PR3)2 [R = phenyl (Ph, 1c), cyclohexyl (Cy, 1d), tert-butyl (tBu, 1e)]. In the presence of Et2AlCl and Cl3CCOOEt (ETA), 1a-1e exhibit good activities for the polymerization of ethylene, affording linear, semicrystalline PEs with a melting temperature of approximately 130 °C. Mainly alternating copolymers with high comonomer incorporation were obtained in the E/NB copolymerization. A relationship was found between the electronic and steric properties of the phosphine ligands and the catalytic performance. Overall, the presence of electron-withdrawing ligand substituents increases the productivity, complexes with aryl phosphine (weaker σ-donor character) exhibiting a higher (co)polymerization initiation rate than those with alkyl phosphines (stronger σ-donor character). Steric effects also seem to play a key role since 1d and 1e, having large size phosphines (PCy3 θ = 170° and PtBu3 θ = 182°, respectively) are more active than 1a (PMe2Ph θ = 122°). In this case, the larger size of PtBu3 and PCy3 likely compensates for their higher donor strength compared to PMe2Ph.
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Affiliation(s)
- Giorgia Zanchin
- CNR-Istituto per lo Studio delle Macromolecole (ISMAC), via A. Corti 12, I-20133 Milano, Italy.
| | - Alessia Gavezzoli
- CNR-Istituto per lo Studio delle Macromolecole (ISMAC), via A. Corti 12, I-20133 Milano, Italy.
| | - Fabio Bertini
- CNR-Istituto per lo Studio delle Macromolecole (ISMAC), via A. Corti 12, I-20133 Milano, Italy.
| | - Giovanni Ricci
- CNR-Istituto per lo Studio delle Macromolecole (ISMAC), via A. Corti 12, I-20133 Milano, Italy.
| | - Giuseppe Leone
- CNR-Istituto per lo Studio delle Macromolecole (ISMAC), via A. Corti 12, I-20133 Milano, Italy.
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Hollfelder CO, Jende LN, Dietrich H, Eichele K, Maichle‐Mössmer C, Anwander R. 1,3‐Diene Polymerization Promoted by Half‐Sandwich Rare‐Earth‐Metal Dimethyl Complexes: Active Species Clustering and Cationization/Deactivation Processes. Chemistry 2019; 25:7298-7302. [PMID: 30945775 DOI: 10.1002/chem.201901269] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Indexed: 11/08/2022]
Affiliation(s)
- Christoph O. Hollfelder
- Institut für Anorganische Chemie, Eberhard-Karls-Universität Tübingen Auf der Morgenstelle 18 72076 Tübingen Germany
| | - Lars N. Jende
- Institut für Anorganische Chemie, Eberhard-Karls-Universität Tübingen Auf der Morgenstelle 18 72076 Tübingen Germany
| | - Hans‐Martin Dietrich
- Institut für Anorganische Chemie, Eberhard-Karls-Universität Tübingen Auf der Morgenstelle 18 72076 Tübingen Germany
| | - Klaus Eichele
- Institut für Anorganische Chemie, Eberhard-Karls-Universität Tübingen Auf der Morgenstelle 18 72076 Tübingen Germany
| | - Cäcilia Maichle‐Mössmer
- Institut für Anorganische Chemie, Eberhard-Karls-Universität Tübingen Auf der Morgenstelle 18 72076 Tübingen Germany
| | - Reiner Anwander
- Institut für Anorganische Chemie, Eberhard-Karls-Universität Tübingen Auf der Morgenstelle 18 72076 Tübingen Germany
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Preparation of Butadiene-Isoprene Copolymer with High Vinyl Contents by Al(OPhCH₃)(i-Bu)₂/MoO₂Cl₂∙TNPP. Polymers (Basel) 2019; 11:polym11030527. [PMID: 30960511 PMCID: PMC6473405 DOI: 10.3390/polym11030527] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Revised: 03/15/2019] [Accepted: 03/15/2019] [Indexed: 11/17/2022] Open
Abstract
In this study, a butadiene-isoprene coordination polymerization was initiated by a binary molybdenum (Mo)-based catalytic system consisting of modified MoO2Cl2 as the primary catalyst, triethyl aluminum substituted by m-cresol as the co-catalyst and tris(nonyl phenyl) phosphate (TNPP) as the ligand. The effects of the amount of catalyst and type of co-catalyst were investigated in detail. Experimental results indicated that when the butadiene-isoprene coordination polymerization was initiated by the binary Mo-based catalytic system, the monomer conversion could reach 90%. The resulting butadiene units were primarily based on 1,2-structures, and the reactivity ratios of butadiene and isoprene were 1.13 and 0.31, respectively. The reaction in the catalytic system was attributed to the non-ideal and non-constant ratio copolymerization. When the addition of isoprene monomers was relatively low, the isoprene units on the butadiene-isoprene copolymers were primarily based on the 1,2- and 3,4-structures. Moreover, the orientation of active centers to 1,2- and 3,4-structures gradually decreased with an increase in the addition of isoprene monomers, which resulted in the generation of high vinyl butadiene-isoprene copolymers.
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Yamakawa S, Takeuchi D, Osakada K, Takano S, Kaita S. Copolymerization of 1,3-butadiene and norbornene catalyzed by Ni complexes [1]. REACT FUNCT POLYM 2019. [DOI: 10.1016/j.reactfunctpolym.2018.12.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Pampaloni G, Guelfi M, Sommazzi A, Leone G, Masi F, Zacchini S, Ricci G. Synthesis and spectroscopic characterization of titanium pyridylanilido complexes as catalysts for the polymerization of 1,3-butadiene and isoprene. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2018.12.029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Solvent effect in 1,3-butadiene polymerization by cyclopentadienyl titanium trichloride (CpTiCl3)/methylaluminoxane (MAO) and pentamethylcyclopentadienyl titanium trichloride (Cp*TiCl3)/MAO catalysts. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2018.12.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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