1
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Dai J, Dai S. Impact of o-aryl halogen effects on ethylene polymerization: steric vs. electronic effects. Dalton Trans 2024; 53:9286-9293. [PMID: 38712871 DOI: 10.1039/d4dt00850b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
Ligand steric hindrance and electronic effects play a crucial role in late-transition metal-catalyzed olefin polymerization. In this research, a series of o-aryl halogenated α-diimine ligands bearing bulky dibenzhydryl substituents, along with their corresponding nickel catalysts, have been synthesized and thoroughly characterized. The nickel catalysts demonstrated very high activity in ethylene polymerization, achieving a high rate of up to 107 g mol-1 h-1. The produced polyethylenes displayed a broad spectrum of molecular weights (12.2-871.7 kg mol-1) but maintained consistent branching densities (50-82/1000 C) when polymerized at a fixed temperature with different nickel catalysts. Notably, the polymerization temperature has a significant influence on both the molecular weight and branching density of the resulting polyethylene. Higher temperatures led to the formation of polyethylenes with lower molecular weights and increased branching densities. Interestingly, the o-aryl halogens significantly impact the molecular weight of the polyethylene. The size of the halogen substituents primarily determines the molecular weight of the polyethylene. However, in terms of branching density, the steric and electronic effects of these substituents appear to counteract each other. In addition, the branched high molecular weight polyethylenes from the bromine and chlorine substituted nickel catalysts are excellent polyethylene thermoplastic elastomers with high strain at break values (688-2478%) and high strain recovery values (42-62%).
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Affiliation(s)
- Jianjian Dai
- Institutes of Physical Science and Information Technology, Anhui University, Hefei, Anhui, 230601, China.
| | - Shengyu Dai
- Institutes of Physical Science and Information Technology, Anhui University, Hefei, Anhui, 230601, China.
- Anhui Laboratory of Molecule-Based Materials, Key Laboratory of Functional Molecular Solids, Ministry of Education, School of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China
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2
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Mills LR, Simmons EM, Lee H, Nester E, Kim J, Wisniewski SR, Pecoraro MV, Chirik PJ. (Phenoxyimine)nickel-Catalyzed C(sp 2)-C(sp 3) Suzuki-Miyaura Cross-Coupling: Evidence for a Recovering Radical Chain Mechanism. J Am Chem Soc 2024; 146:10124-10141. [PMID: 38557045 DOI: 10.1021/jacs.4c01474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Phenoxyimine (FI)-nickel(II)(2-tolyl)(DMAP) compounds were synthesized and evaluated as precatalysts for the C(sp2)-C(sp3) Suzuki-Miyaura cross coupling of (hetero)arylboronic acids with alkyl bromides. With 5 mol % of the optimal (MeOMeFI)Ni(Aryl)(DMAP) precatalyst, the scope of the cross-coupling reaction was established and included a variety of (hetero)arylboronic acids and alkyl bromides (>50 examples, 33-97% yield). A β-hydride elimination-reductive elimination sequence from reaction with potassium isopropoxide base, yielding a potassium (FI)nickel(0)ate, was identified as a catalyst activation pathway that is responsible for halogen atom abstraction from the alkyl bromide. A combination of NMR and EPR spectroscopies identified (FI)nickel(II)-aryl complexes as the resting state during catalysis with no evidence for long-lived organic radical or odd-electron nickel intermediates. These data establish that the radical chain is short-lived and undergoes facile termination and also support a "recovering radical chain" process whereby the (FI)nickel(II)-aryl compound continually (re)initiates the radical chain. Kinetic studies established that the rate of C(sp2)-C(sp3) product formation was proportional to the concentration of the (FI)nickel(II)-aryl resting state that captures the alkyl radical for chain propagation. The proposed mechanism involves two key and concurrently operating catalytic cycles; the first involving a nickel(I/II/III) radical propagation cycle consisting of radical capture at (FI)nickel(II)-aryl, C(sp2)-C(sp3) reductive elimination, bromine atom abstraction from C(sp3)-Br, and transmetalation; and the second involving an off-cycle catalyst recovery process by slow (FI)nickel(II)-aryl → (FI)nickel(0)ate conversion for nickel(I) regeneration.
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Affiliation(s)
- L Reginald Mills
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Eric M Simmons
- Chemical Process Development, Bristol Myers Squibb Company, New Brunswick, New Jersey 08903, United States
| | - Heejun Lee
- Chemical Process Development, Bristol Myers Squibb Company, New Brunswick, New Jersey 08903, United States
| | - Eva Nester
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Junho Kim
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Steven R Wisniewski
- Chemical Process Development, Bristol Myers Squibb Company, New Brunswick, New Jersey 08903, United States
| | - Matthew V Pecoraro
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Paul J Chirik
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
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3
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Li Y, Liu Q, Bao J, Yiu SM, Chan MCW. Coplanar binuclear group 4 post-metallocene complexes supported by chelating μ-(σ 2-aryl) ligands: characterisation and olefin polymerisation catalysis. Dalton Trans 2023; 53:346-353. [PMID: 38050668 DOI: 10.1039/d3dt03641c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/06/2023]
Abstract
The report concerns expansion of the previously developed M-[O,N,C] [pyridine-2-phenolate-6-(σ-aryl)] catalyst system into rigid, coplanar bimetallic assemblies, which afford metal-metal distances that are predetermined yet amenable for cooperativity, as well as locked-in "syn" orientation of binding sites that offer the same direction of access for substrates. The binuclear complexes are generated in a regioselective manner to yield para hydrogen atoms (not ortho) at the central μ-aryl moiety, and have been characterised by multinuclear NMR spectroscopy. The "anti" (showing opposite directions of access) and mononuclear analogues have also been prepared for comparison purposes. Six syn-type bimetallic derivatives of Ti, Zr and Hf have been characterised by X-ray crystallography, to reveal metal-metal separations of 6.3-6.7 Å. For ethylene and ethylene/1-octene polymerisation reactions in conjunction with trityl borate, the syn-Ti2 catalysts display superior efficiencies and produced polymers with higher Mw values than for the anti and mono-Ti congeners, thus indicating the possibility of favourable enchainment interactions and cooperative reactivity.
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Affiliation(s)
- Yufang Li
- Department of Chemistry and Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China.
| | - Qian Liu
- Department of Chemistry and Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China.
| | - Junhui Bao
- Department of Chemistry and Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China.
| | - Shek-Man Yiu
- Department of Chemistry and Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China.
| | - Michael C W Chan
- Department of Chemistry and Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China.
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4
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Zhang Y, Zhang Y, Hu X, Wang C, Jian Z. Advances on Controlled Chain Walking and Suppression of Chain Transfer in Catalytic Olefin Polymerization. ACS Catal 2022. [DOI: 10.1021/acscatal.2c04272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yixin Zhang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Yuxing Zhang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- University of Science and Technology of China, Hefei 230026, China
| | - Xiaoqiang Hu
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- University of Science and Technology of China, Hefei 230026, China
| | - Chaoqun Wang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- University of Science and Technology of China, Hefei 230026, China
| | - Zhongbao Jian
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- University of Science and Technology of China, Hefei 230026, China
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5
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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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6
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Wu J, Deng B, Hou J, Huang X, Tang H, Wang K. Thermal‐Stable Asymmetric α‐Diimine Nickel (II) Catalysts: Synthesis, Characterization and Its Norbornene (Co)Polymerization Behavior. Appl Organomet Chem 2022. [DOI: 10.1002/aoc.6712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jia‐Jun Wu
- School of Materials Science and Engineering Chongqing University of Technology Chongqing People’s Republic of China
| | - Bo Deng
- School of Materials Science and Engineering Chongqing University of Technology Chongqing People’s Republic of China
| | - Jia‐Hong Hou
- School of Materials Science and Engineering Chongqing University of Technology Chongqing People’s Republic of China
| | - Xin‐Yue Huang
- School of Materials Science and Engineering Chongqing University of Technology Chongqing People’s Republic of China
- Chongqing Materials Research Institute Co., Ltd. Chongqing People’s Republic of China
- School of Chemistry and Chemical Engineering Chongqing University Chongqing People’s Republic of China
| | - Hui‐Yi Tang
- Chongqing Materials Research Institute Co., Ltd. Chongqing People’s Republic of China
| | - Kai‐Ti Wang
- School of Materials Science and Engineering Chongqing University of Technology Chongqing People’s Republic of China
- Chongqing Materials Research Institute Co., Ltd. Chongqing People’s Republic of China
- School of Chemistry and Chemical Engineering Chongqing University Chongqing People’s Republic of China
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7
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Wang X, Xu M, Zhang S, Qasim M, Chen M. Fluorine Effect on α-Imino-ketone- and Phenoxyiminato Nickel-Catalyzed Ethylene Homo- and Copolymerization. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xiaoyue Wang
- Institutes of Physical Science and Information Technology, School of Computer Science and Technology, Anhui University, Hefei 230601, Anhui, China
| | - Mengli Xu
- Institutes of Physical Science and Information Technology, School of Computer Science and Technology, Anhui University, Hefei 230601, Anhui, China
| | - Shaojie Zhang
- Institutes of Physical Science and Information Technology, School of Computer Science and Technology, Anhui University, Hefei 230601, Anhui, China
| | - Muhammad Qasim
- Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Min Chen
- Institutes of Physical Science and Information Technology, School of Computer Science and Technology, Anhui University, Hefei 230601, Anhui, China
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8
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Wang Y, Hu X, Mu H, Xia Y, Chi Y, Jian Z. Enhancement on Nickel-Mediated Ethylene Polymerization by Concerted Steric Hindrance and Fluorine Effect. ACTA CHIMICA SINICA 2022. [DOI: 10.6023/a22020066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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9
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Fan H, Chang G, Bi H, Gui X, Wang H, Xu G, Dai S. Facile Synthesis of Hyperbranched Ethylene Oligomers and Ethylene/Methyl Acrylate Co-oligomers with Different Microscopic Chain Architectures. ACS POLYMERS AU 2021; 2:88-96. [PMID: 36855342 PMCID: PMC9954315 DOI: 10.1021/acspolymersau.1c00039] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Low-molecular-weight (MW) ethylene oligomers with hyperbranched microstructures are often difficult to be synthesized by traditional catalytic processes. In this study, a series of N-terphenyl iminopyridyl ligands and the corresponding Pd(II) and Ni(II) complexes bearing remote conjugated substituents with different electronic effects (H, Me, F, Cl, and tBu) were synthesized in a simple and efficient way. These Pd(II) and Ni(II) complexes were highly effective in the ethylene oligomerization and co-oligomerization with methyl acrylate (MA). Low-MW ethylene oligomers with hyperbranched microstructures were generated using the iminopyridyl Pd(II) and Ni(II) complexes in ethylene oligomerization. More importantly, polar functionalized ethylene-MA co-oligomers with low MWs and varying incorporation ratios were generated via ethylene and MA co-oligomerization using the Pd(II) complexes. Most notably, these ethylene oligomers obtained by different metal species showed a significant difference in microscopic chain architectures. The remote conjugated electron effect showed little effect on the polymerization parameters of the iminopyridyl system, which is very different from those of the salicylaldiminato system.
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Affiliation(s)
- Huijun Fan
- Institutes
of Physical Science and Information Technology, Key Laboratory of
Structure and Functional Regulation of Hybrid Materials of Ministry
of Education, Anhui University, Hefei, Anhui 230601, China
| | - Guanru Chang
- School
of Chemistry and Chemical Engineering, Key Laboratory of Inorganic
Functional Material, Huangshan University, Huangshan, Anhui 245041, China
| | - Huiqin Bi
- School
of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, China
| | - Xu Gui
- School
of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, China
| | - Hui Wang
- School
of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, China,
| | - Guoyong Xu
- Institutes
of Physical Science and Information Technology, Key Laboratory of
Structure and Functional Regulation of Hybrid Materials of Ministry
of Education, Anhui University, Hefei, Anhui 230601, China,
| | - Shengyu Dai
- Institutes
of Physical Science and Information Technology, Key Laboratory of
Structure and Functional Regulation of Hybrid Materials of Ministry
of Education, Anhui University, Hefei, Anhui 230601, China,School
of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, China,
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10
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Zhang Q, Lin W, Liu T, Ye Z, Liang T, Sun WH. Fluorinated Sterically Bulky Mononuclear and Binuclear 2-Iminopyridylnickel Halides for Ethylene Polymerization: Effects of Ligand Frameworks and Remote Substituents. ACS OMEGA 2021; 6:30157-30172. [PMID: 34778687 PMCID: PMC8582273 DOI: 10.1021/acsomega.1c05418] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 10/19/2021] [Indexed: 06/02/2023]
Abstract
In the present work, four new mono(imino)pyridine ligands, 2-((2,4-bis(bis(4-R-phenyl)methyl)-6-fluorophenylimino)methyl)pyridine (R = H, L1; R = OCH3, L2; R = F, L3) and 2-((2-(bis(4-fluorophenyl)methyl)-4-((3-(bis(4-fluorophenyl)methyl)-4-amine-5-fluoro-phenyl)(phenyl)methyl)-6-fluorophenylimino)methyl)pyridine (L4), have been designed in good yields. Additionally, three novel benzhydryl-bridged bis(imino)pyridine ligands, 2-(2-(bis(4-R-phenyl)methyl)-6-fluoro-phenylimino)pyridine (R = H, L5; R = OCH3, L6; R = F, L7), were also prepared for comparison. All these organic compounds have been characterized by FT-IR analysis, 1H/13C NMR spectroscopy, and elemental analysis. The treatment of L1-L7 with nickel halides afforded the corresponding monometallic (Ni1-Ni4) and bimetallic (Ni5-Ni7) nickel complexes in moderate to good overall yields. Upon activation with methylaluminoxane (MAO), Ni4 Cl showed the highest activity up to 8.3 × 106 g of polyethylene (PE) (mol of Ni)-1 h-1 among Ni1-Ni7 for ethylene polymerization. In all cases, unsaturated PEs with low molecular weights (0.7-13.3 kg mol-1) were produced effectively. The introduction of remote para-substituents into the benzhydryl groups showed a beneficial effect on catalytic activity with the overall activities following the order of Ni-F > Ni-OCH3 > Ni-H. In addition, these para-substituents were also found to affect not only the catalytic performance of catalysts but also the branching content of the PE product. Generally, the resultant PE waxes were moderately branched and contained both terminal vinyls (-CH=CH2) and internal vinylenes (-CH=CH-) while with different ratios of vinyls to vinylenes. Notably, the polymers produced using para-methoxy-substituted Ni2/MAO and Ni6/MAO possessed the least branching content and uniquely high vinyl contributions.
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Affiliation(s)
- Qiuyue Zhang
- 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, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wenhua Lin
- Key
Laboratory of Engineering Plastics and Beijing National Laboratory
for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Tian Liu
- 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, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhibin Ye
- Department
of Chemical and Materials Engineering, Concordia
University, Montreal, Quebec H3G1M8, Canada
| | - Tongling Liang
- Key
Laboratory of Engineering Plastics and Beijing National Laboratory
for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, 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
- CAS
Research/Education Center for Excellence in Molecular Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
- State
Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou
Institute of Chemical Physics, Chinese Academy
of Sciences, Lanzhou 730000, China
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11
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Skarjan L, Villegas‐Escobar N, Correa SA, Daniliuc CG, Matute RA, Rojas RS. Bulky and Electron‐Deficient α‐Iminocarboxamidato‐Nickel(II) Complexes: A Study of the Steric and Electronic Effects on Ethylene Activation. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Leon Skarjan
- Anorganisch-Chemisches Institut Ruprecht-Karls-Universität Heidelberg Im Neuenheimer Feld 270 Heidelberg Germany
| | - Nery Villegas‐Escobar
- Centro Integrativo de Biología y Química Aplicada (CIBQA) Universidad Bernardo O'Higgins General Gana 1702 Santiago 8370854 Chile
| | - Sebastián A. Correa
- Departamento de Ciencias Químicas y Biológicas Universidad Bernardo O'Higgins General Gana 1702 Santiago Chile
| | - Constantin G. Daniliuc
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Corrensstrasse 40 48149 Münster Germany
| | - Ricardo A. Matute
- Centro Integrativo de Biología y Química Aplicada (CIBQA) Universidad Bernardo O'Higgins General Gana 1702 Santiago 8370854 Chile
- Division of Chemistry and Chemical Engineering California Institute of Technology Pasadena California 91125 USA
| | - René S. Rojas
- Laboratorio de Química Inorgánica Facultad de Química y de Farmacia Pontificia Universidad Católica de Chile Av. Vicuña Mackenna 4860 Casilla 306 Chile
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12
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Hu X, Zhang Y, Li B, Jian Z. Fluorinated α-Diimine Nickel Mediated Ethylene (Co)Polymerization. Chemistry 2021; 27:11935-11942. [PMID: 34114692 DOI: 10.1002/chem.202101521] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Indexed: 11/10/2022]
Abstract
Fluorine substituents in transition metal catalysts are of great importance in olefin polymerization catalysis; however, the comprehensive effect of fluorine substituents is elusive in seminal late transition metal α-diimine catalytic system. In this contribution, fluorine substituents at various positions (ortho-, meta-, and para-F) and with different numbers (Fn ; n=0, 1, 2, 3, 5) were installed into the well-defined N-terphenyl amine and thus were studied for the first time in the nickel α-diimine promoted ethylene polymerization and copolymerization with polar monomers. The position of the fluorine substituent was particularly crucial in these polymerization reactions in terms of catalytic activity, polymer molecular weight, branching density, and incorporation of polar monomer, and thus a picture on the fluorine effect was given. As a notable result, the ortho-F substituted α-diimine nickel catalyst produced highly linear polyethylenes with an extremely high molecular weight (Mw =8703 kDa) and a significantly low degree of branching of 1.4/1000 C; however, the meta-F and/or para-F substituted α-diimine nickel catalysts generated highly branched (up to 80.2/1000 C) polyethylenes with significantly low molecular weights (Mw =20-50 kDa).
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Affiliation(s)
- Xiaoqiang Hu
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Renmin Street 5625, Changchun, 130022, China.,University of Science and Technology of China, Hefei, 230026, China
| | - Yixin Zhang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Renmin Street 5625, Changchun, 130022, China
| | - Baixiang Li
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Renmin Street 5625, Changchun, 130022, China
| | - Zhongbao Jian
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Renmin Street 5625, Changchun, 130022, China.,University of Science and Technology of China, Hefei, 230026, China
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13
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Li Q, Wang C, Mu H, Jian Z. A readily available neutral nickel catalyst for accessing linear ultrahigh molecular weight polyethylene in a living manner. J Catal 2021. [DOI: 10.1016/j.jcat.2021.06.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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14
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Wang X, Dong B, Yang Q, Liu H, Hu Y, Zhang X. Boosting the Thermal Stability of α-Diimine Palladium Complexes in Norbornene Polymerization from Construction of Intraligand Hydrogen Bonding and Simultaneous Increasing Axial/Equatorial Bulkiness. Inorg Chem 2021; 60:2347-2361. [PMID: 33501824 DOI: 10.1021/acs.inorgchem.0c03185] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Increasing the thermostability of α-diimine late-transition-metal complexes and therefore rendering them more active at higher temperatures is of great importance, yet challenging for the olefin polymerization field. In the present research, a new family of α-diimine palladium complexes that can promote norbornene polymerization at high temperatures (up to 140 °C) is disclosed. Because of the conformational restriction caused by increasing the axial and equatorial bulkiness as well as the presence of intraligand H···F hydrogen bonds, N-aryl rotations can be efficiently restricted, therefore circumventing the deactivation of the active species at high temperatures. At 80-140 °C, these complexes can efficiently catalyze norbornene homopolymerizations, giving high catalytic activities up to 5.65 × 107 g of PNB per mole Ni per hour and polymers with high molecular weights up to 37.2 × 104 g/mol, which are highly superior to catalytic systems mediated by CF3-free complexes. Moreover, these complexes could also afford medium catalytic activities in the presence of polar 5-norbornene-2-carboxylic acid methyl ester (NB-COOCH3).
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Affiliation(s)
- Xiaohua Wang
- CAS Key Laboratory of High-Performance Synthetic Rubber and its Composite Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, Jilin China.,School of Applied Chemistry and Engineering, University of Science and Technology of China Hefei 230026, Anhui, China
| | - Bo Dong
- CAS Key Laboratory of High-Performance Synthetic Rubber and its Composite Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, Jilin China
| | - Qi Yang
- Key Laboratory of Rubber-Plastics of the Ministry of Education/Shandong Province (QUST), School of Polymer Science & Engineering, Qingdao University of Science & Technology, 53-Zhengzhou Road, Qingdao 266042, Shandong, P. R. China
| | - Heng Liu
- CAS Key Laboratory of High-Performance Synthetic Rubber and its Composite Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, Jilin China.,Key Laboratory of Rubber-Plastics of the Ministry of Education/Shandong Province (QUST), School of Polymer Science & Engineering, Qingdao University of Science & Technology, 53-Zhengzhou Road, Qingdao 266042, Shandong, P. R. China
| | - Yanming Hu
- Division of Energy Materials, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
| | - Xuequan Zhang
- CAS Key Laboratory of High-Performance Synthetic Rubber and its Composite Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, Jilin China.,School of Applied Chemistry and Engineering, University of Science and Technology of China Hefei 230026, Anhui, China.,Key Laboratory of Rubber-Plastics of the Ministry of Education/Shandong Province (QUST), School of Polymer Science & Engineering, Qingdao University of Science & Technology, 53-Zhengzhou Road, Qingdao 266042, Shandong, P. R. China
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15
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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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16
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Zheng H, Zhong L, Du C, Du W, Cheung CS, Ruan J, Gao H. Combining hydrogen bonding interactions with steric and electronic modifications for thermally robust α-diimine palladium catalysts toward ethylene (co)polymerization. Catal Sci Technol 2021. [DOI: 10.1039/d0cy01617a] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Thermally robust α-diimine palladium catalysts are highly active for ethylene (co)polymerization at high temperatures by steric and electronic modifications in combination with hydrogen bonding interactions.
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Affiliation(s)
- Handou Zheng
- School of Materials Science and Engineering
- PCFM Lab
- GD HPPC Lab
- Sun Yat-sen University
- Guangzhou 510275
| | - Liu Zhong
- School of Materials Science and Engineering
- PCFM Lab
- GD HPPC Lab
- Sun Yat-sen University
- Guangzhou 510275
| | - Cheng Du
- School of Materials Science and Engineering
- PCFM Lab
- GD HPPC Lab
- Sun Yat-sen University
- Guangzhou 510275
| | - Wenbo Du
- School of Materials Science and Engineering
- PCFM Lab
- GD HPPC Lab
- Sun Yat-sen University
- Guangzhou 510275
| | - Chi Shing Cheung
- School of Materials Science and Engineering
- PCFM Lab
- GD HPPC Lab
- Sun Yat-sen University
- Guangzhou 510275
| | - Jingjing Ruan
- School of Materials Science and Engineering
- PCFM Lab
- GD HPPC Lab
- Sun Yat-sen University
- Guangzhou 510275
| | - Haiyang Gao
- School of Materials Science and Engineering
- PCFM Lab
- GD HPPC Lab
- Sun Yat-sen University
- Guangzhou 510275
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17
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Bagherabadi M, Zohuri G, Ramezanian N, Kimiaghalam M, Khoshsefat M. Microstructural study on MMA/1‐hexene copolymers made by mononuclear and dinuclear α‐diimine nickel (II) catalysts. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.6121] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Mohadeseh Bagherabadi
- Department of Chemistry, Faculty of Science Ferdowsi University of Mashhad Mashhad Iran
| | - Gholamhossein Zohuri
- Department of Chemistry, Faculty of Science Ferdowsi University of Mashhad Mashhad Iran
| | - Navid Ramezanian
- Department of Chemistry, Faculty of Science Ferdowsi University of Mashhad Mashhad Iran
| | - Mahsa Kimiaghalam
- Department of Chemistry, Faculty of Science Ferdowsi University of Mashhad Mashhad Iran
| | - Mostafa Khoshsefat
- Key Laboratory of Engineering Plastics, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry Chinese Academy of Sciences Beijing China
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18
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Mecking S, Schnitte M. Neutral Nickel(II) Catalysts: From Hyperbranched Oligomers to Nanocrystal-Based Materials. Acc Chem Res 2020; 53:2738-2752. [PMID: 33094994 DOI: 10.1021/acs.accounts.0c00540] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Plastics materials are a vital component of modern technologies. They are applied, e.g., in construction, transportation, communication, water supply, or health care. Consequently, polyolefins-the most important plastics by scale-are produced in vast amounts by catalytic polymerization. Effective and selective as the catalysts used may be, their high sensitivity toward any polar compounds limits these methods to hydrocarbon reaction media and monomers like ethylene and propylene, respectively. This can be overcome by less oxophilic late transition metal catalysts, and here particularly neutral nickel(II) catalysts have seen major advances in the past few years. They stand out due to being capable of aqueous catalytic polymerizations. Aqueous polymerizations are benign processes that advantageously yield polymers in the form of particles. Moreover, these catalysts can incorporate polar monomers like acrylates, a realm previously restricted to noble metal catalysts. The introduction of polar moieties can induce properties like compatibility with metals or fibers in high performance composite materials or a desirable degradability.This Account provides a personal account of developments in the past decade. Prior findings are outlined briefly as a background. Aqueous polymerizations afford unique polyethylene morphologies as a result of the unusual underlying particle growth mechanism. Polymer single crystals are formed, which can be composed of a single ultrahigh molecular weight chain. This represents a completely disentangled state of such extremely long polymer chains, which has been long sought-after in order to overcome the difficult processing of high performance ultrahigh molecular weight materials. A key prerequisite for this approach and utilization of these catalysts, in general, is control of polymer branching and molecular weight. This is achieved via remote substituents on the Ni(II)-chelating ligand. Despite their distal position to the active site, weak secondary interactions control whether branching and chain transfer pathways compete very effectively with chain growth or are suppressed entirely. This provides access to hyperbranched oligomers, on the one hand, and enables living polymerizations to strictly linear high molecular weight polymer, on the other hand. Other advanced catalysts provide linear copolymers with in-chain polar monomer repeat units for the first time with non-noble metal active sites. Mechanistic studies further revealed that for copolymerizations with polar vinyl monomers the decisive limiting factor is irreversible termination reactions with neutral Ni(II) catalysts, rather than the well-recognized reversible blocking of coordination sites by the polar functional groups found for other types of catalysts. The mechanistic picture also implies the possibility of free-radical pathways, and their role in the formation of desirable polymer end groups and polymer blends is now being recognized. The area of neutral Ni(II) catalysts has progressed significantly in the entire range from fundamental mechanistic understanding, catalyst performance, and previously inaccessible polymer microstructures, and it is moving forward to materials through unique concepts. The unprecedented ability to incorporate functional groups into linear crystalline polyethylene also provides perspectives for much needed polyolefin materials that will not persist in the natural environment for several decades but that can be degraded by virtue of low levels of functional groups.
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Affiliation(s)
- Stefan Mecking
- Chair of Chemical Materials Science, Department of Chemistry, University of Konstanz, Universitätsstrasse 10, 78457 Konstanz, Germany
| | - Manuel Schnitte
- Chair of Chemical Materials Science, Department of Chemistry, University of Konstanz, Universitätsstrasse 10, 78457 Konstanz, Germany
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19
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Yang H, Ingen Y, Blom B, Rastogi S, Romano D. Structural modification of phenoxyimine titanium complexes and activation studies with alkylaluminum compounds. ChemCatChem 2020. [DOI: 10.1002/cctc.202000731] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Huaqin Yang
- Department of Biobased Materials Faculty of Science and Engineering Maastricht University Brightlands Chemelot Campus Geleen 6167 RD The Netherlands
- Aachen-Maastricht Institute for Biobased Materials Brightlands Chemelot Campus Geleen 6167 RD The Netherlands
| | - Yara Ingen
- Aachen-Maastricht Institute for Biobased Materials Brightlands Chemelot Campus Geleen 6167 RD The Netherlands
- Maastricht Science Programme Faculty of Science and Engineering Maastricht University Kapoenstraat 2 PO Box 616 6200 MD Maastricht The Netherlands
| | - Burgert Blom
- Maastricht Science Programme Faculty of Science and Engineering Maastricht University Kapoenstraat 2 PO Box 616 6200 MD Maastricht The Netherlands
| | - Sanjay Rastogi
- Department of Biobased Materials Faculty of Science and Engineering Maastricht University Brightlands Chemelot Campus Geleen 6167 RD The Netherlands
- Aachen-Maastricht Institute for Biobased Materials Brightlands Chemelot Campus Geleen 6167 RD The Netherlands
| | - Dario Romano
- Department of Biobased Materials Faculty of Science and Engineering Maastricht University Brightlands Chemelot Campus Geleen 6167 RD The Netherlands
- Aachen-Maastricht Institute for Biobased Materials Brightlands Chemelot Campus Geleen 6167 RD The Netherlands
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20
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Falivene L, Cavallo L, Talarico G. The role of noncovalent interactions in olefin polymerization catalysis: a further look to the fluorinated ligand effect. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2020.111118] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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21
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Lin F, Liu Z, Wang M, Liu B, Li S, Cui D. Chain Transfer to Toluene in Styrene Coordination Polymerization. Angew Chem Int Ed Engl 2020; 59:4324-4328. [PMID: 31916646 DOI: 10.1002/anie.201914603] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 01/02/2020] [Indexed: 11/09/2022]
Abstract
The chain-transfer reaction is rather important in coordination polymerization regarding catalytic efficiency, adjustment of molecular weight, and control of chain structure. To date, chain transfer to H2 and Al, Mg, and Zn alkyl compounds and β-H elimination are the commonly encountered modes. Now a novel chain transfer to toluene is reported. By introducing fluorine atoms into the β-diketimine ligands, an inert catalytic system for styrene (St) coordination polymerization was transferred into the highly active one. The activity increased with an increase in the number of fluorines in the ligands. Surprisingly, the molecular weights of resultant polystyrenes are very low (Mn =2000-6600 Da) despite of St loadings, corresponding up to 121 chains per active species. The mechanisms were investigated by DFT simulation, MALDI-TOF MS, isotope tracing experiment and 2D NMR spectrum analyses, which revealed that the fluorine activated the polymerization and directed chain transfer to toluene.
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Affiliation(s)
- Fei Lin
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China.,University of Chinese Academy of Sciences, Changchun Branch, Changchun, 130022, China.,University of Science and Technology of China, Hefei, Anhui, China
| | - Zhaohe Liu
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China.,University of Chinese Academy of Sciences, Changchun Branch, Changchun, 130022, China.,University of Science and Technology of China, Hefei, Anhui, China
| | - Meiyan Wang
- Institute of Theoretical Chemistry, Jilin University, Changchun, China
| | - Bo Liu
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
| | - Shihui Li
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
| | - Dongmei Cui
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China.,University of Chinese Academy of Sciences, Changchun Branch, Changchun, 130022, China.,University of Science and Technology of China, Hefei, Anhui, China
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22
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Lin F, Liu Z, Wang M, Liu B, Li S, Cui D. Chain Transfer to Toluene in Styrene Coordination Polymerization. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201914603] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Fei Lin
- State Key Laboratory of Polymer Physics and ChemistryChangchun Institute of Applied ChemistryChinese Academy of Sciences Changchun 130022 China
- University of Chinese Academy of Sciences Changchun Branch Changchun 130022 China
- University of Science and Technology of China Hefei Anhui China
| | - Zhaohe Liu
- State Key Laboratory of Polymer Physics and ChemistryChangchun Institute of Applied ChemistryChinese Academy of Sciences Changchun 130022 China
- University of Chinese Academy of Sciences Changchun Branch Changchun 130022 China
- University of Science and Technology of China Hefei Anhui China
| | - Meiyan Wang
- Institute of Theoretical ChemistryJilin University Changchun China
| | - Bo Liu
- State Key Laboratory of Polymer Physics and ChemistryChangchun Institute of Applied ChemistryChinese Academy of Sciences Changchun 130022 China
| | - Shihui Li
- State Key Laboratory of Polymer Physics and ChemistryChangchun Institute of Applied ChemistryChinese Academy of Sciences Changchun 130022 China
| | - Dongmei Cui
- State Key Laboratory of Polymer Physics and ChemistryChangchun Institute of Applied ChemistryChinese Academy of Sciences Changchun 130022 China
- University of Chinese Academy of Sciences Changchun Branch Changchun 130022 China
- University of Science and Technology of China Hefei Anhui China
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23
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Mido T, Iitsuka H, Kobayashi M, Noguchi K, Yonezawa N, Okamoto A. Fluoro Group Pivoting Dual Hydrogen Bonding Intramolecular Bridge for 1,2-Bis(2-fluorophenyl)acenaphthenediol Molecule in Solution: NMR Spectrometrical Confirmation of Simultaneous Participation of F–C(sp 2) Group to Through-space-couplings with Aromatic and Hydroxy Hydrogen Atoms. CHEM LETT 2020. [DOI: 10.1246/cl.190903] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Takahiro Mido
- Department of Organic and Polymer Materials Chemistry, Tokyo University of Agriculture and Technology, 2-24-16 Nakamachi, Koganei, Tokyo 184-8588, Japan
| | - Hiroaki Iitsuka
- Department of Organic and Polymer Materials Chemistry, Tokyo University of Agriculture and Technology, 2-24-16 Nakamachi, Koganei, Tokyo 184-8588, Japan
| | - Miyuki Kobayashi
- Department of Organic and Polymer Materials Chemistry, Tokyo University of Agriculture and Technology, 2-24-16 Nakamachi, Koganei, Tokyo 184-8588, Japan
| | - Keiichi Noguchi
- Instrumentation Analysis Center, Tokyo University of Agriculture and Technology, 2-24-16 Nakamachi, Koganei, Tokyo 184-8588, Japan
| | - Noriyuki Yonezawa
- Department of Organic and Polymer Materials Chemistry, Tokyo University of Agriculture and Technology, 2-24-16 Nakamachi, Koganei, Tokyo 184-8588, Japan
| | - Akiko Okamoto
- Department of Organic and Polymer Materials Chemistry, Tokyo University of Agriculture and Technology, 2-24-16 Nakamachi, Koganei, Tokyo 184-8588, Japan
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24
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Schnitte M, Scholliers JS, Riedmiller K, Mecking S. Remote Perfluoroalkyl Substituents are Key to Living Aqueous Ethylene Polymerization. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201913117] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Manuel Schnitte
- Chair of Chemical Materials Science Department of Chemistry University of Konstanz 78457 Konstanz Germany
| | - Janine S. Scholliers
- Chair of Chemical Materials Science Department of Chemistry University of Konstanz 78457 Konstanz Germany
| | - Kai Riedmiller
- Chair of Chemical Materials Science Department of Chemistry University of Konstanz 78457 Konstanz Germany
| | - Stefan Mecking
- Chair of Chemical Materials Science Department of Chemistry University of Konstanz 78457 Konstanz Germany
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25
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Schnitte M, Scholliers JS, Riedmiller K, Mecking S. Remote Perfluoroalkyl Substituents are Key to Living Aqueous Ethylene Polymerization. Angew Chem Int Ed Engl 2020; 59:3258-3263. [PMID: 31773825 PMCID: PMC7027523 DOI: 10.1002/anie.201913117] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Revised: 11/26/2019] [Indexed: 01/28/2023]
Abstract
In various nickel(II) salicylaldiminato ethylene polymerization catalysts, which are a versatile mechanistic probe for substituent effects, longer perfluoroalkyl groups exert a strong effect on catalytic activities and polymer microstructures compared to the trifluoromethyl group. This effect is accounted for by a reduced electron density on the active sites, and is also supported by electrochemical studies. Thus, β‐hydride elimination, the key step of chain transfer and branching pathways, is disfavored while chain‐growth rates are enhanced. This enhancement occurs to an extent that enables living polymerizations in aqueous systems to afford ultra‐high‐molecular‐weight polyethylene for various chelating salicylaldimine motifs. These findings are mechanistically instructive as well as practically useful for illustrating the potential of perfluoroalkyl groups in catalyst design.
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Affiliation(s)
- Manuel Schnitte
- Chair of Chemical Materials Science, Department of Chemistry, University of Konstanz, 78457, Konstanz, Germany
| | - Janine S Scholliers
- Chair of Chemical Materials Science, Department of Chemistry, University of Konstanz, 78457, Konstanz, Germany
| | - Kai Riedmiller
- Chair of Chemical Materials Science, Department of Chemistry, University of Konstanz, 78457, Konstanz, Germany
| | - Stefan Mecking
- Chair of Chemical Materials Science, Department of Chemistry, University of Konstanz, 78457, Konstanz, Germany
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26
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Liang T, Goudari SB, Chen C. A simple and versatile nickel platform for the generation of branched high molecular weight polyolefins. Nat Commun 2020; 11:372. [PMID: 31953416 PMCID: PMC6969022 DOI: 10.1038/s41467-019-14211-0] [Citation(s) in RCA: 100] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2019] [Accepted: 12/11/2019] [Indexed: 02/05/2023] Open
Abstract
The development of high-performance transition metal catalysts has long been a major driving force in academic and industrial polyolefin research. Late transition metal-based olefin polymerization catalysts possess many unique properties, such as the ability to generate variously branched polyolefins using only ethylene as the feedstock and the capability of incorporating polar functionalized comonomers without protecting agents. Here we report the synthesis and (co)polymerization studies of a simple but extremely versatile α-imino-ketone nickel system. This type of catalyst is easy to synthesize and modify, and it is thermally stable and highly active during ethylene polymerization without the addition of any cocatalysts. Despite the sterically open nature, these catalysts can generate branched Ultra-High-Molecular-Weight polyethylene and copolymerize ethylene with a series of polar comonomers. The versatility of this platform has been further demonstrated through the synthesis of a dinuclear nickel catalyst and the installation of an anchor for catalyst heterogenization.
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Affiliation(s)
- Tao Liang
- CAS Key Laboratory of Soft Matter Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Shabnam B Goudari
- CAS Key Laboratory of Soft Matter Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Changle Chen
- CAS Key Laboratory of Soft Matter Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, 230026, China.
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27
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Wang X, Dong B, Yang Q, Liu H, Zhang C, Zhang X. α-Diimine nickel complexes bearing axially bulky terphenyl and equatorially bulky dibenzobarrelene groups: synthesis, characterization and olefin polymerization studies. Polym Chem 2020. [DOI: 10.1039/d0py01152e] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A new family of asymmetric α-diimine nickel complexes bearing axially and equatorially bulky groups were synthesized successfully. They exhibited high catalytic activities for ethylene polymerization and afforded ultra-high-molecular-weight elastomeric polyethylenes.
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Affiliation(s)
- Xiaohua Wang
- CAS Key Laboratory of High-Performance Synthetic Rubber and its Composite Materials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
- China
| | - Bo Dong
- CAS Key Laboratory of High-Performance Synthetic Rubber and its Composite Materials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
- China
| | - Qi Yang
- School of Applied Chemistry and Engineering
- University of Science and Technology of China
- Hefei 230026
- 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
- China
| | - Chunyu Zhang
- CAS Key Laboratory of High-Performance Synthetic Rubber and its Composite Materials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
- 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
- China
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28
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Li S, Xu G, Dai S. A remote nonconjugated electron effect in insertion polymerization with α-diimine nickel and palladium species. Polym Chem 2020. [DOI: 10.1039/d0py00218f] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The remote nonconjugated electronic perturbations exert great influence on ethylene polymerization.
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Affiliation(s)
- Shuaikang Li
- Institutes of Physical Science and Information Technology
- Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education
- Anhui University
- Hefei
- China
| | - Guoyong Xu
- Institutes of Physical Science and Information Technology
- Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education
- Anhui University
- Hefei
- China
| | - Shengyu Dai
- Institutes of Physical Science and Information Technology
- Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education
- Anhui University
- Hefei
- China
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29
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Correa SA, Daniliuc CG, Stark HS, Rojas RS. Nickel Catalysts Activated by rGO Modified with a Boron Lewis Acid To Produce rGO-Hyperbranched PE Nanocomposites. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00397] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sebastián A. Correa
- Laboratorio de Química Inorgánica, Facultad de Química, Pontificia Universidad Católica de Chile, Casilla 306, Santiago-22 6094411, Chile
| | - Constantin G. Daniliuc
- Organisch-Chemisches Institut, Westfälische Wilhelm-Universität, D-48149 Münster, Germany
| | - H. Sophia Stark
- Department of Chemistry and Catalysis Research Center, Technische Universität München, Lichtenbergstraβe 4, D-85747 Garching, Germany
| | - René S. Rojas
- Laboratorio de Química Inorgánica, Facultad de Química, Pontificia Universidad Católica de Chile, Casilla 306, Santiago-22 6094411, Chile
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30
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Zou C, Tan C, Pang W, Chen C. Amidine/Phosphine‐Oxide‐Based Nickel Catalysts for Ethylene Polymerization and Copolymerization. ChemCatChem 2019. [DOI: 10.1002/cctc.201901114] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Chen Zou
- Hefei National Laboratory for Physical Sciences at the Microscale CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and EngineeringUniversity of Science and Technology of China Hefei 230026 P. R. China
| | - Chen Tan
- Hefei National Laboratory for Physical Sciences at the Microscale CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and EngineeringUniversity of Science and Technology of China Hefei 230026 P. R. China
| | - Wenmin Pang
- Hefei National Laboratory for Physical Sciences at the Microscale CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and EngineeringUniversity of Science and Technology of China Hefei 230026 P. R. China
| | - Changle Chen
- Hefei National Laboratory for Physical Sciences at the Microscale CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and EngineeringUniversity of Science and Technology of China Hefei 230026 P. R. China
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31
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Liu CC, Liu Q, Yiu SM, Chan MCW. Group 4 Post-Metallocenes Supported by [OCH2N,C(σ-aryl)] Auxiliaries Bearing a Seven-Membered Metallacycle: Synthesis, Characterization, and Catalysts for Olefin Polymerization. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00307] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Cham-Chuen Liu
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Qian Liu
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Shek-Man Yiu
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Michael C. W. Chan
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
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32
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Effects of backbone substituent and intra-ligand hydrogen bonding interaction on ethylene polymerizations with α-diimine nickel catalysts. J Catal 2019. [DOI: 10.1016/j.jcat.2019.05.026] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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33
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Zhang Y, Mu H, Wang X, Pan L, Li Y. Elaborate Tuning in Ligand Makes a Big Difference in Catalytic Performance: Bulky Nickel Catalysts for (Co)polymerization of Ethylene with Promising Vinyl Polar Monomers. ChemCatChem 2019. [DOI: 10.1002/cctc.201900265] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yanping Zhang
- School of Material Science and Engineering and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)Tianjin University Tianjin 300072 China
| | - Hongliang Mu
- Polymer Composites Engineering Laboratory Changchun Institute of Applied ChemistryChinese Academy of Sciences Changchun 130022 China
| | - Xuling Wang
- School of Material Science and Engineering and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)Tianjin University Tianjin 300072 China
| | - Li Pan
- School of Material Science and Engineering and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)Tianjin University Tianjin 300072 China
| | - Yuesheng Li
- School of Material Science and Engineering and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)Tianjin University Tianjin 300072 China
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34
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Rendón-López VM, Castro ÁJA, Alvarado Monzón JC, Cristóbal C, Gonzalez GG, Montiel SG, Serrano O, Lopez JA. Ni(II), Pd(II) and Pt(II) complexes with SacNac tridentate ligand. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.01.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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35
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Cai Z, Xiao D, Do LH. Cooperative Heterobimetallic Catalysts in Coordination Insertion Polymerization. COMMENT INORG CHEM 2019. [DOI: 10.1080/02603594.2019.1570165] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Zhongzheng Cai
- Department of Chemistry, University of Houston, Houston, Texas, USA
| | - Dawei Xiao
- Department of Chemistry, University of Houston, Houston, Texas, USA
| | - Loi H. Do
- Department of Chemistry, University of Houston, Houston, Texas, USA
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36
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Thompson RR, Zavalij PY, Sita LR. Electronic Effect Rate Enhancement in the Stereoselective Living Coordinative Polymerization of α-Olefins by α,α,α-Trifluoroacetamidinate-Modified Group 4 Metal CPAMCF3 Initiators. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00839] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rick R. Thompson
- Laboratory of Applied Catalyst Science and Technology, Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Peter Y. Zavalij
- Laboratory of Applied Catalyst Science and Technology, Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Lawrence R. Sita
- Laboratory of Applied Catalyst Science and Technology, Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
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37
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Liu C, Liu Q, Lo P, Lau K, Yiu S, Chan MCW. Olefin Polymerization Reactivity of Group 4 Post‐Metallocene Catalysts Bearing a Four‐Membered C(sp3)‐Donor Chelate Ring. ChemCatChem 2018. [DOI: 10.1002/cctc.201801008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Cham‐Chuen Liu
- Department of ChemistryCity University of Hong Kong Tat Chee Avenue, Kowloon Hong Kong
| | - Qian Liu
- Department of ChemistryCity University of Hong Kong Tat Chee Avenue, Kowloon Hong Kong
| | - Po‐Kam Lo
- Department of ChemistryCity University of Hong Kong Tat Chee Avenue, Kowloon Hong Kong
| | - Kai‐Chung Lau
- Department of ChemistryCity University of Hong Kong Tat Chee Avenue, Kowloon Hong Kong
| | - Shek‐Man Yiu
- Department of ChemistryCity University of Hong Kong Tat Chee Avenue, Kowloon Hong Kong
| | - Michael C. W. Chan
- Department of ChemistryCity University of Hong Kong Tat Chee Avenue, Kowloon Hong Kong
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38
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TERAO H, NAKANO T, ISHII S, FUJITA T. Attractive Interactions in Olefin Polymerization—Controlled Chain Transfer. KOBUNSHI RONBUNSHU 2018. [DOI: 10.1295/koron.2018-0028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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39
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Figueira CA, Lopes PS, Gomes CSB, Gomes JCS, Lemos F, Gomes PT. New phenyl-nickel complexes of bulky 2-iminopyrrolyl chelates: synthesis, characterisation and application as aluminium-free catalysts for the production of hyperbranched polyethylene. Dalton Trans 2018; 47:15857-15872. [PMID: 30358779 DOI: 10.1039/c8dt02824a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A family of mono(2-iminopyrrolyl) complexes with the general formula [Ni{κ2N,N'-5-(aryl)-NC4H2-2-C(H)[double bond, length as m-dash]N-2,6-(aryl)}(C6H5)(PPh3)] were obtained from the reaction of the sodium salts of the newly synthesised 5-aryl-2-(N-arylformimino)pyrroles with the square planar complex trans-[Ni(C6H5)(PPh3)2Cl]. These new iminopyrrole ligand precursors, designed with increasing bulkiness and different electronic properties, and their corresponding nickel(ii) complexes were characterised by NMR spectroscopy and elemental analysis, and their structural features were analysed by single crystal X-ray diffraction. The nickel complexes were tested as aluminium-free catalysts for the polymerisation of ethylene, at low to moderate pressures and different temperatures and in the absence or presence of the phosphine scavenger [Ni(COD)2], giving rise to catalytic activities in the range of 3.61-73.12 kgPE molNi-1 h-1 bar-1. The polyethylene products formed in these catalytic reactions were characterised by GPC/SEC and NMR spectroscopy. Generally, low molecular weight (Mn 510-1300 g mol-1) low viscosity oils were obtained, presenting high branching degrees (80-125 branches per 1000 C atoms), which are characteristic of hyperbranched polyethylene products. In particular, polymerisation reactions using catalyst 7 led to higher viscosity oils with molecular weights between 11 000 and 20 000 g mol-1, and branching degrees of 100-120 branches per 1000 C atoms.
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Affiliation(s)
- Cláudia A Figueira
- Centro de Química Estrutural, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal.
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40
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Suo H, Solan GA, Ma Y, Sun WH. Developments in compartmentalized bimetallic transition metal ethylene polymerization catalysts. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2018.06.006] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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41
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Mitchell NE, Long BK. Recent advances in thermally robust, late transition metal-catalyzed olefin polymerization. POLYM INT 2018. [DOI: 10.1002/pi.5694] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Nolan E Mitchell
- Department of Chemistry; University of Tennessee; Knoxville TN USA
| | - Brian K Long
- Department of Chemistry; University of Tennessee; Knoxville TN USA
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42
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Lu N, Zheng JH, Lin LC, Liu LK, Chiang HF, Li TY, Wen YS, Yang CK, Chen SW, Thrasher JS. Studies of two different types of intramolecular C-H···F-C interactions from polyfluorinated diiodometal(II) diimine complexes. J CHIN CHEM SOC-TAIP 2018. [DOI: 10.1002/jccs.201800161] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Norman Lu
- Institute of Organic and Polymeric Materials; National Taipei University of Technology; Taipei Taiwan, Republic of China
- Department of Molecular Science and Engineering; National Taipei University of Technology; Taipei Taiwan, Republic of China
| | - Jing-Hung Zheng
- Institute of Organic and Polymeric Materials; National Taipei University of Technology; Taipei Taiwan, Republic of China
| | - Lei-Chin Lin
- Institute of Organic and Polymeric Materials; National Taipei University of Technology; Taipei Taiwan, Republic of China
- Department of Molecular Science and Engineering; National Taipei University of Technology; Taipei Taiwan, Republic of China
| | - Ling-Kang Liu
- Institute of Organic and Polymeric Materials; National Taipei University of Technology; Taipei Taiwan, Republic of China
| | - Hsing-Fang Chiang
- Institute of Organic and Polymeric Materials; National Taipei University of Technology; Taipei Taiwan, Republic of China
| | - Ting-You Li
- Department of Molecular Science and Engineering; National Taipei University of Technology; Taipei Taiwan, Republic of China
- Department of Chemistry, Advanced Materials Research Laboratory; Clemson University; Anderson South Carolina
| | - Yuh-Sheng Wen
- Institute of Chemistry; Academia Sinica; Taipei Taiwan, Republic of China
| | - Chung-Kuang Yang
- Department of Chemical Engineering and Biotechnology; National Taipei University of Technology; Taipei Taiwan, Republic of China
| | - Shih-Wen Chen
- Department of Chemical Engineering and Biotechnology; National Taipei University of Technology; Taipei Taiwan, Republic of China
| | - Joseph S. Thrasher
- Department of Chemistry, Advanced Materials Research Laboratory; Clemson University; Anderson South Carolina
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43
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Chen C. Designing catalysts for olefin polymerization and copolymerization: beyond electronic and steric tuning. Nat Rev Chem 2018. [DOI: 10.1038/s41570-018-0003-0] [Citation(s) in RCA: 345] [Impact Index Per Article: 57.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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44
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Gao Y, Chen X, Zhang J, Chen J, Lohr TL, Marks TJ. Catalyst Nuclearity Effects on Stereo- and Regioinduction in Pyridylamidohafnium-Catalyzed Propylene and 1-Octene Polymerizations. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b00181] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Yanshan Gao
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Xia Chen
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113, United States
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China
| | - Jialong Zhang
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113, United States
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Jiazhen Chen
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Tracy L. Lohr
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Tobin J. Marks
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113, United States
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45
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Konishi Y, Tao WJ, Yasuda H, Ito S, Oishi Y, Ohtaki H, Tanna A, Tayano T, Nozaki K. Nickel-Catalyzed Propylene/Polar Monomer Copolymerization. ACS Macro Lett 2018; 7:213-217. [PMID: 35610895 DOI: 10.1021/acsmacrolett.7b00904] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Nickel complexes bearing bidentate alkylphophine-phenolate ligands were synthesized and applied to the polymerization of propylene and the copolymerization of propylene and polar monomers. Therein, the use of bulky alkyl substituents on the phosphorus atom was crucial for the formation of highly regioregular polypropylenes. Theoretical calculations suggested that the 1,2-insertion of propylene is favored over the 2,1-insertion in these nickel-catalyzed (co)polymerization reactions. The substituent at the ortho position relative to the oxido group greatly influences the polymerization activity, the molecular weight, and stereoregularity of the polypropylenes. This method delivers moderately isotactic ([mm] ≤ 68%) crystalline polypropylenes. The present system represents the first example for a nickel-catalyzed regiocontrolled copolymerization of propylene and polar monomers such as but-3-en-1-ol, but-3-en-1-yl acetate, and tert-butyl allylcarbamate.
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Affiliation(s)
- Yohei Konishi
- Japan Polychem Corporation, 1000 Kamoshida-cho, Aoba-ku, Yokohama, Kanagawa 227-8502, Japan
| | - Wen-jie Tao
- Department
of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Hina Yasuda
- Department
of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Shingo Ito
- Department
of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Yasuo Oishi
- Japan Polychem Corporation, 1000 Kamoshida-cho, Aoba-ku, Yokohama, Kanagawa 227-8502, Japan
| | - Hisashi Ohtaki
- Japan Polychem Corporation, 1000 Kamoshida-cho, Aoba-ku, Yokohama, Kanagawa 227-8502, Japan
| | - Akio Tanna
- Japan Polychem Corporation, 1 Toho-cho, Yokkaichi, Mie 510-0848, Japan
| | - Takao Tayano
- Japan Polychem Corporation, 1 Toho-cho, Yokkaichi, Mie 510-0848, Japan
| | - Kyoko Nozaki
- Department
of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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46
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Chen M, Chen C. A Versatile Ligand Platform for Palladium- and Nickel-Catalyzed Ethylene Copolymerization with Polar Monomers. Angew Chem Int Ed Engl 2018; 57:3094-3098. [DOI: 10.1002/anie.201711753] [Citation(s) in RCA: 148] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Revised: 12/25/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Min Chen
- CAS Key Laboratory of Soft Matter Chemistry, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials); Department of Polymer Science and Engineering; University of Science and Technology of China; Hefei 230026 China
| | - Changle Chen
- CAS Key Laboratory of Soft Matter Chemistry, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials); Department of Polymer Science and Engineering; University of Science and Technology of China; Hefei 230026 China
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47
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Chen M, Chen C. A Versatile Ligand Platform for Palladium- and Nickel-Catalyzed Ethylene Copolymerization with Polar Monomers. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201711753] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Min Chen
- CAS Key Laboratory of Soft Matter Chemistry, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials); Department of Polymer Science and Engineering; University of Science and Technology of China; Hefei 230026 China
| | - Changle Chen
- CAS Key Laboratory of Soft Matter Chemistry, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials); Department of Polymer Science and Engineering; University of Science and Technology of China; Hefei 230026 China
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48
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Falivene L, Wiedemann T, Göttker-Schnetmann I, Caporaso L, Cavallo L, Mecking S. Control of Chain Walking by Weak Neighboring Group Interactions in Unsymmetrical Catalysts. J Am Chem Soc 2018; 140:1305-1312. [DOI: 10.1021/jacs.7b08975] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Laura Falivene
- King
Abdullah University of Science and Technology, Chemical and Life Sciences
and Engineering, Kaust Catalysis Center, Thuwal 23955-6900, Saudi Arabia
| | - Thomas Wiedemann
- Chair of Chemical Materials Science, Department of Chemistry, University of Konstanz, 78464 Konstanz, Germany
| | - Inigo Göttker-Schnetmann
- Chair of Chemical Materials Science, Department of Chemistry, University of Konstanz, 78464 Konstanz, Germany
| | - Lucia Caporaso
- Department
of Chemistry, University of Salerno, Via Giovanni Paolo II, 84084 Fisciano (SA), Italy
| | - Luigi Cavallo
- King
Abdullah University of Science and Technology, Chemical and Life Sciences
and Engineering, Kaust Catalysis Center, Thuwal 23955-6900, Saudi Arabia
| | - Stefan Mecking
- Chair of Chemical Materials Science, Department of Chemistry, University of Konstanz, 78464 Konstanz, Germany
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49
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Yang D, Dong J, Wang B. Homo- and copolymerization of norbornene with tridentate nickel complexes bearingo-aryloxide-N-heterocyclic carbene ligands. Dalton Trans 2018; 47:180-189. [DOI: 10.1039/c7dt03928j] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
New pincer-type tridentate nickel catalysts bearingo-aryloxide-NHC ligands were applied to catalyze the copolymerization of norbornene and 1-octene at elevated temperature.
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Affiliation(s)
- Dandan Yang
- State Key Laboratory of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
- P. R. China
| | - Jie Dong
- State Key Laboratory of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
- P. R. China
| | - Baiquan Wang
- State Key Laboratory of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
- P. R. China
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50
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Xu D, Zhao XX, Chen ZT, Ma YG. Synergistic effect and fluorination effect in ethylene polymerization by nickel phenoxyiminato catalysts. CHINESE JOURNAL OF POLYMER SCIENCE 2017. [DOI: 10.1007/s10118-018-2081-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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