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Recent progress on the tridentate iron complex catalysts for ethylene oligo-/polymerization. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2023. [DOI: 10.1016/bs.adomc.2022.12.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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2
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Thermally Stable and Highly Efficient N,N,N-Cobalt Olefin Polymerization Catalysts Affixed with N-2,4-Bis(Dibenzosuberyl)-6-Fluorophenyl Groups. Catalysts 2022. [DOI: 10.3390/catal12121569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The cobalt(II) chloride N,N,N-pincer complexes, [2-{(2,4-(C15H13)2-6-FC6H2)N=CMe}-6-(ArN=CMe)C5H3N]CoCl2 (Ar = 2,6-Me2C6H3) (Co1), 2,6-Et2C6H3 (Co2), 2,6-i-Pr2C6H3 (Co3), 2,4,6-Me3C6H2 (Co4), 2,6-Et2-4-MeC6H2 (Co5), and [2,6-{(2,4-(C15H13)2-6-FC6H2)N=CMe}2C5H3N]CoCl2 (Co6), each containing at least one N-2,4-bis(dibenzosuberyl)-6-fluorophenyl group, were synthesized in good yield from their corresponding unsymmetrical (L1–L5) and symmetrical bis(imino)pyridines (L6). The molecular structures of Co1 and Co2 spotlighted their distorted square pyramidal geometries (τ5 value range: 0.23–0.29) and variations in steric hindrance offered by the dissimilar N-aryl groups. On activation with either MAO or MMAO, Co1–Co6 all displayed high activities for ethylene polymerization, with levels falling in the order: Co1 > Co4 > Co5 > Co2 > Co3 > Co6. Indeed, the least sterically hindered 2,6-dimethyl Co1 in combination with MAO exhibited a very high activity of 1.15 × 107 g PE mol−1 (Co) h−1 at the operating temperature of 70 °C, which dropped by only 15% at 80 °C and 43% at 90 °C. Vinyl-terminated polyethylenes of high linearity and narrow dispersity were generated by all catalysts, with the most sterically hindered, Co3 and Co6, producing the highest molecular weight polymers [Mw range: 30.26–33.90 kg mol−1 (Co3) and 42.90–43.92 kg mol−1 (Co6)]. In comparison with structurally related cobalt catalysts, it was evident that the presence of the N-2,4-bis(dibenzosuberyl)-6-fluorophenyl groups had a limited effect on catalytic activity but a marked effect on thermal stability.
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3
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Developments in late transition metal catalysts with high thermal stability for ethylene polymerization: A crucial aspect from laboratory to industrialization. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Yuan SF, Wang L, Yan Y, Liu T, Flisak Z, Ma Y, Sun WH. 4,4'-Dimethoxybenzhydryl substituent augments performance of bis(imino)pyridine cobalt-based catalysts in ethylene polymerization. RSC Adv 2022; 12:15741-15750. [PMID: 35685715 PMCID: PMC9127841 DOI: 10.1039/d2ra01547a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Accepted: 05/17/2022] [Indexed: 11/21/2022] Open
Abstract
A series of cobalt complexes with bis(imino)pyridine derivatives featuring unsymmetrical substitution with bulky groups has been synthesized and characterized. The molecular structures of two representatives have been determined by the single-crystal X-ray diffraction study, revealing distorted tetrahedral geometry with different degrees of steric hindrance imparted by the two inequivalent aryl groups attached to the imine nitrogen atoms. On activation with either MAO or MMAO, these complexes display high activity toward ethylene polymerization, reaching 8.71 × 106 g of PE (mol of Co)−1 h−1 at 60 °C and produce polyethylene of high molecular weight (Mw = 5.27 × 105 g mol−1) and low dispersity. The presence of the methoxy-substituent noticeably enhances the activity of the cobalt catalyst and increases the molecular weight of the resultant polyethylene. Employing ligands with 4,4′-dimethoxybenzhydryl groups, the cobalt precatalysts display high activities toward ethylene polymerization and produce highly linear polyethylenes, the high density polyethylene (HDPE).![]()
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Affiliation(s)
- Shi-Fang Yuan
- The School of Chemistry and Chemical Engineering, Institute of Applied Chemistry, Shanxi University Taiyuan 030006 China
| | - Luyao Wang
- The School of Chemistry and Chemical Engineering, Institute of Applied Chemistry, Shanxi University Taiyuan 030006 China .,Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
| | - Yi Yan
- The School of Chemistry and Chemical Engineering, Institute of Applied Chemistry, Shanxi University Taiyuan 030006 China .,Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
| | - Tian Liu
- The School of Chemistry and Chemical Engineering, Institute of Applied Chemistry, Shanxi University Taiyuan 030006 China .,Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
| | - Zygmunt Flisak
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China .,Faculty of Chemistry, University of Opole Oleska 48 45-052 Opole Poland
| | - Yanping Ma
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
| | - Wen-Hua Sun
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
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5
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Investigating the Effects of Para-methoxy Substitution in Sterically Enhanced Unsymmetrical Bis(arylimino)pyridine-cobalt Ethylene Polymerization Catalysts. CHINESE JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1007/s10118-022-2670-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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6
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Lin W, Zhang L, Solan GA, Ma Y, Liang T, Sun W. Naphthalenyl‐Substituted α,α′‐Bisimino‐2,3 : 5,6‐Bis(pentamethylene)pyridines as Thermally Robust Supports for Iron Ethylene Polymerization Catalysts. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100595] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Wenhua Lin
- School of Textiles Science and Engineering Jiangnan University Wuxi, Jiangsu 214122 China
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
| | - Liping Zhang
- School of Textiles Science and Engineering Jiangnan University Wuxi, Jiangsu 214122 China
| | - Gregory A. Solan
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
- Department of Chemistry University of Leicester University Road Leicester LE1 7RH UK
| | - Yanping Ma
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
| | - 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
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7
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Yuan S, Fan Z, Han M, Yan Y, Flisak Z, Ma Y, Liang T, Sun W. Enhancing Performance of a Bis(arylimino)pyridine‐Iron Precatalyst for Ethylene Polymerization by Substitution with a 2,4‐Bis(4,4′‐dimethoxybenzhydryl)‐6‐methylphenyl Group. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100145] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Shi‐Fang Yuan
- Institute of Applied Chemistry Shanxi University Taiyuan 030006 China
| | - Zhe Fan
- Institute of Applied Chemistry Shanxi University Taiyuan 030006 China
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
| | - Mingyang Han
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
| | - Yi Yan
- Institute of Applied Chemistry Shanxi University Taiyuan 030006 China
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
| | - Zygmunt Flisak
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
- Faculty of Chemistry University of Opole Oleska 48 45-052 Opole Poland
| | - Yanping Ma
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
| | - Tongling Liang
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
| | - Wen‐Hua Sun
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 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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8
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Investigations on the Ethylene Polymerization with Bisarylimine Pyridine Iron (BIP) Catalysts. Catalysts 2021. [DOI: 10.3390/catal11030407] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
The kinetics and terminations of ethylene polymerization, mediated by five bisarylimine pyridine (BIP) iron dichloride precatalysts, and activated by large amounts of methyl aluminoxane (MAO) was studied. Narrow distributed paraffins from initially formed aluminum polymeryls and broader distributed 1-polyolefins and (bimodal) mixtures, thereof, were obtained after acidic workup. The main pathway of olefin formation is beta-hydrogen transfer to ethylene. The rate of polymerization in the initial phase is inversely proportional to the co-catalyst concentration for all pre-catalysts; a first-order dependence was found on ethylene and catalyst concentrations. The inhibition by aluminum alkyls is released to some extent in a second phase, which arises after the original methyl groups are transformed into n-alkyl entities and the aluminum polymeryls partly precipitate in the toluene medium. The catalysis is interpretable in a mechanism, wherein, the relative rate of chain shuttling, beta-hydrogen transfer and insertion of ethylene are determining the outcome. Beta-hydrogen transfer enables catalyst mobility, which leads to a (degenerate) chain growth of already precipitated aluminum alkyls. Stronger Lewis acidic centers of the single site catalysts, and those with smaller ligands, are more prone to yield 1-olefins and to undergo a faster reversible alkyl exchange between aluminum and iron.
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9
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Guo J, Zhang W, Liang T, Sun WH. Revisiting the 2-imino-1,10-phenanthrolylmetal precatalyst in ethylene oligomerization: Benzhydryl-modified cobalt(II) complexes and their dimerization of ethylene. Polyhedron 2021. [DOI: 10.1016/j.poly.2020.114865] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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10
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Zhang Q, Yang W, Wang Z, Solan GA, Liang T, Sun WH. Doubly fused N, N, N-iron ethylene polymerization catalysts appended with fluoride substituents; probing catalytic performance via a combined experimental and MLR study. Catal Sci Technol 2021. [DOI: 10.1039/d1cy00821h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
In agreement with the MLR analysis, the fluorinated iron precatalyst, R1 = F, R2 = R3 = CH(p-FPh)2, proved the most active at 70 °C generating strictly linear polyethylene waxes.
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Affiliation(s)
- Qiuyue Zhang
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry, Chinese Academy of Sciences
- Beijing 100190
- China
- CAS Research/Education Center for Excellence in Molecular Sciences and International School
| | - Wenhong Yang
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry, Chinese Academy of Sciences
- Beijing 100190
- China
| | - Zheng Wang
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry, Chinese Academy of Sciences
- Beijing 100190
- China
| | - Gregory A. Solan
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry, Chinese Academy of Sciences
- Beijing 100190
- China
- Department of Chemistry
| | - Tongling Liang
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry, Chinese Academy of Sciences
- Beijing 100190
- China
| | - Wen-Hua Sun
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry, Chinese Academy of Sciences
- Beijing 100190
- China
- Department of Chemistry
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11
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Guo L, Zhang W, Cao F, Jiang Y, Zhang R, Ma Y, Solan GA, Sun Y, Sun WH. Remote dibenzocycloheptyl substitution on a bis(arylimino)pyridyl-iron ethylene polymerization catalyst; enhanced thermal stability and unexpected effects on polymer properties. Polym Chem 2021. [DOI: 10.1039/d1py00660f] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The title iron catalyst displays exceptionally high catalytic activity at 70 °C and high activity at 100 °C; wax-like properties are a feature of the polyethylenes as are the narrow dispersities.
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Affiliation(s)
- Liwei Guo
- Beijing Key Laboratory of Clothing Materials R&D and Assessment
- Beijing Engineering Research Center of Textile Nanofiber
- School of Materials Science and Engineering
- Beijing institute of Fashion Technology
- Beijing 100029
| | - Wenjuan Zhang
- Beijing Key Laboratory of Clothing Materials R&D and Assessment
- Beijing Engineering Research Center of Textile Nanofiber
- School of Materials Science and Engineering
- Beijing institute of Fashion Technology
- Beijing 100029
| | - Furong Cao
- Beijing Key Laboratory of Clothing Materials R&D and Assessment
- Beijing Engineering Research Center of Textile Nanofiber
- School of Materials Science and Engineering
- Beijing institute of Fashion Technology
- Beijing 100029
| | - Youshu Jiang
- Beijing Key Laboratory of Clothing Materials R&D and Assessment
- Beijing Engineering Research Center of Textile Nanofiber
- School of Materials Science and Engineering
- Beijing institute of Fashion Technology
- Beijing 100029
| | - Randi Zhang
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- 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
| | - Gregory A. Solan
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Yang Sun
- 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
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12
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Zhang Q, Li Z, Han M, Xiang J, Solan GA, Ma Y, Liang T, Sun WH. Fluorinated cobalt catalysts and their use in forming narrowly dispersed polyethylene waxes of high linearity and incorporating vinyl functionality. Catal Sci Technol 2021. [DOI: 10.1039/d0cy01917h] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The depicted cobalt catalysts bearing ortho-fluorine and fluorinated ortho-benzhydryl substituents displayed a preference for forming highly linear PE waxes; DFT studies have been used to probe this selectivity.
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Affiliation(s)
- Qiuyue Zhang
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Zilong Li
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Mingyang Han
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Junfeng Xiang
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Gregory A. Solan
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Yanping Ma
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Tongling Liang
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Wen-Hua Sun
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
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13
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Yuan SF, Fan Z, Yan Y, Ma Y, Han M, Liang T, Sun WH. Achieving polydispersive HDPE by N, N, N-Co precatalysts appended with N-2,4-bis(di(4-methoxyphenyl)methyl)-6-methylphenyl. RSC Adv 2020; 10:43400-43411. [PMID: 35519690 PMCID: PMC9058363 DOI: 10.1039/d0ra09333e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Accepted: 11/23/2020] [Indexed: 01/15/2023] Open
Abstract
A family of unsymmetrical 2-(2,4-bis(di(4-methoxyphenyl)methyl)-6-MeC6H2N)-6-(1-(arylimino)ethyl)pyridine-cobalt dichloride complexes has been synthesized and characterized by NMR spectroscopy, FT-IR spectroscopy and elemental analysis as well as single crystal X-ray diffraction for Co2 and Co4. Activated with either MAO or MMAO, all the cobalt precatalysts displayed high activities toward ethylene polymerization and produced highly linear polyethylenes with high molecular weights as well as wide polydispersities; for example, the performance using Co1/MAO at 50 °C reached 9.17 × 106 g PE (mol of Co)−1 h−1 with the production polyethylene of molecular weight as high as Mw = 3.14 × 105 g mol−1, Tm = 134.3 °C besides its wide polydispersity of Mw/Mn of 54.6. Besides the terminal vinyl group of the resultant polyethylenes, it is rare for a late-transition metal catalyst to achieve highly linear polyethylenes with not only wide polydispersity but also high molecular weights, being similar to high-density polyethylenes produced using Phillips catalyst. Introducing a practical application of N,N,N-Co precatalysts for highly linear polyethylenes with wide polydispersity and high molecular weights, targeting HDPE using Phillips catalyst.![]()
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Affiliation(s)
- Shi-Fang Yuan
- Institute of Applied Chemistry, Shanxi University Taiyuan 030006 People's Republic of China
| | - Zhe Fan
- Institute of Applied Chemistry, Shanxi University Taiyuan 030006 People's Republic of China .,Key Laboratory of Engineering Plastics, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China +86-10-62618239 +86-10-62557955
| | - Yi Yan
- Institute of Applied Chemistry, Shanxi University Taiyuan 030006 People's Republic of China .,Key Laboratory of Engineering Plastics, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China +86-10-62618239 +86-10-62557955
| | - Yanping Ma
- Key Laboratory of Engineering Plastics, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China +86-10-62618239 +86-10-62557955
| | - Mingyang Han
- Key Laboratory of Engineering Plastics, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China +86-10-62618239 +86-10-62557955
| | - Tongling Liang
- Key Laboratory of Engineering Plastics, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China +86-10-62618239 +86-10-62557955
| | - Wen-Hua Sun
- Key Laboratory of Engineering Plastics, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China +86-10-62618239 +86-10-62557955.,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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14
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6-Arylimino-2-(2-(1-phenylethyl)naphthalen-1-yl)-iminopyridylmetal (Fe and Co) Complexes as Highly Active Precatalysts for Ethylene Polymerization: Influence of Metal and/or Substituents on the Active, Thermostable Performance of Their Complexes and Resultant Polyethylenes. MOLECULES (BASEL, SWITZERLAND) 2020; 25:molecules25184244. [PMID: 32947823 PMCID: PMC7570845 DOI: 10.3390/molecules25184244] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Revised: 09/11/2020] [Accepted: 09/14/2020] [Indexed: 12/02/2022]
Abstract
A series of 6-arylimino-2-(2-(1-phenylethyl)naphthalen-1-yl)iminopyridines and their iron(II) and cobalt(II) complexes (Fe1–Fe5, Co1–Co5) were synthesized and routinely characterized as were Co3 and Co5 complexes, studied by single crystal X-ray crystallography, which individually displayed a distorted square pyramidal or trigonal bipyramid around a cobalt center. Upon treatment with either methyluminoxane (MAO) or modified methyluminoxane (MMAO), all complexes displayed high activities regarding ethylene polymerization even at an elevated temperature, enhancing the thermostability of the active species. In general, iron precatalysts showed higher activities than their cobalt analogs; for example, 10.9 × 106 g(PE) mol−1 (Co) h−1 by Co4 and 17.0 × 106 g(PE) mol−1 (Fe) h−1 by Fe4. Bulkier substituents are favored for increasing the molecular weights of the resultant polyethylenes, such as 25.6 kg mol−1 obtained by Co3 and 297 kg mol−1 obtained by Fe3. A narrow polydispersity of polyethylenes was observed by iron precatalysts activated by MMAO, indicating a single-site active species formed.
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15
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Zada M, Vignesh A, Suo H, Ma Y, Liu H, Sun WH. NNN-type iron(II) complexes consisting sterically hindered dibenzocycloheptyl group: Synthesis and catalytic activity towards ethylene polymerization. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2020.110981] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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16
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Gansukh B, Zhang Q, Flisak Z, Liang T, Ma Y, Sun W. The chloro‐substituent enhances performance of 2,4‐bis (imino)pyridylchromium catalysts yielding highly linear polyethylene. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5471] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Badral Gansukh
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of ChemistryChinese Academy of Sciences Beijing 100190 China
- CAS Research/Education Center for Excellence in Molecular SciencesUniversity of Chinese Academy of Sciences Beijing 100049 China
| | - Qiuyue Zhang
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of ChemistryChinese Academy of Sciences Beijing 100190 China
- CAS Research/Education Center for Excellence in Molecular SciencesUniversity of Chinese Academy of Sciences Beijing 100049 China
| | - Zygmunt Flisak
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of ChemistryChinese Academy of Sciences Beijing 100190 China
- Faculty of ChemistryUniversity of Opole Oleska 48 45‐052 , Opole Poland
| | - Tongling Liang
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of ChemistryChinese Academy of Sciences Beijing 100190 China
- CAS Research/Education Center for Excellence in Molecular SciencesUniversity of Chinese Academy of Sciences Beijing 100049 China
| | - Yanping Ma
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of ChemistryChinese Academy of Sciences Beijing 100190 China
- CAS Research/Education Center for Excellence in Molecular SciencesUniversity of Chinese Academy of Sciences Beijing 100049 China
| | - Wen‐Hua Sun
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of ChemistryChinese Academy of Sciences Beijing 100190 China
- CAS Research/Education Center for Excellence in Molecular SciencesUniversity of Chinese Academy of Sciences Beijing 100049 China
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical PhysicsChinese Academy of Sciences Lanzhou 730000 China
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17
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Zhang Q, Zhang R, Han M, Yang W, Liang T, Sun WH. 4,4'-Difluorobenzhydryl-modified bis(imino)-pyridyliron(ii) chlorides as thermally stable precatalysts for strictly linear polyethylenes with narrow dispersities. Dalton Trans 2020; 49:7384-7396. [PMID: 32427253 DOI: 10.1039/d0dt01344g] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The 4,4'-difluorobenzhydryl-modified bis(imino)pyridylferrous chlorides, [2-{CMeN(2,6-(4-FC6H4)2CH2-4-t-BuC6H2)}-6-(CMeNAr)C5H3N] FeCl2 (Ar = 2,6-Me2C6H3Fe1, 2,6-Et2C6H3Fe2, 2,6-i-Pr2C6H3Fe3, 2,4,6-Me3C6H2Fe4, 2,6-Et-4-MeC6H2Fe5 and 2,6-(4-FC6H4)2CH2-4-t-BuC6H2Fe6), were synthesized in good yields. All iron complexes were characterized by 1H/19F NMR and elemental analysis, and the molecular structures of representative complexes Fe1 and Fe6 were determined by single crystal X-ray diffraction, which revealed a slightly distorted square pyramid around the iron center. Activated with either MAO or MMAO, Fe1-Fe5 exhibited very high activities (up to 17.2 × 106 g (PE) mol-1 (Fe) h-1 for Fe1/MMAO) toward ethylene polymerization, producing highly linear polyethylenes with narrow dispersities as required by industry and value added PEs. Importantly, the Fe1/MAO maintained an activity of 9.5 × 106 g (PE) mol-1 (Fe) h-1 at 100 °C of operating temperature, making the catalytic system suitable for practical application. Simulation quantitatively revealed the mechanism of the enhanced catalytic performance from the electronic and steric point of view.
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Affiliation(s)
- Qiuyue Zhang
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China. and CAS Research/Education Center for Excellence in Molecular Sciences and International School, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Randi Zhang
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China. and CAS Research/Education Center for Excellence in Molecular Sciences and International School, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Mingyang Han
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China. and CAS Research/Education Center for Excellence in Molecular Sciences and International School, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wenhong Yang
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
| | - Tongling Liang
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
| | - Wen-Hua Sun
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China. and CAS Research/Education Center for Excellence in Molecular Sciences and International School, University of Chinese Academy of Sciences, Beijing 100049, China and 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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18
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Guo J, Zhang W, Oleynik II, Solan GA, Oleynik IV, Liang T, Sun WH. Probing the effect of ortho-cycloalkyl ring size on activity and thermostability in cycloheptyl-fused N,N,N-iron ethylene polymerization catalysts. Dalton Trans 2020; 49:136-146. [DOI: 10.1039/c9dt04325j] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The depicted iron(ii) precatalysts displayed exceptionally high activities for ethylene polymerization at temperatures of up 100 °C producing linear polyethylene with a wide range of molecular weights.
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Affiliation(s)
- Jingjing Guo
- Beijing Key Laboratory of Clothing Materials R&D and Assessment
- Beijing Engineering Research Center of Textile Nanofiber
- School of Materials Science and Engineering
- Beijing Institute of Fashion Technology
- Beijing 100029
| | - Wenjuan Zhang
- Beijing Key Laboratory of Clothing Materials R&D and Assessment
- Beijing Engineering Research Center of Textile Nanofiber
- School of Materials Science and Engineering
- Beijing Institute of Fashion Technology
- Beijing 100029
| | - Ivan I. Oleynik
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry
- Novosibirsk 630090
- Russia
| | - Gregory A. Solan
- Beijing Key Laboratory of Clothing Materials R&D and Assessment
- Beijing Engineering Research Center of Textile Nanofiber
- School of Materials Science and Engineering
- Beijing Institute of Fashion Technology
- Beijing 100029
| | - Irina V. Oleynik
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry
- Novosibirsk 630090
- Russia
| | - Tongling Liang
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Wen-Hua Sun
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
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19
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Bariashir C, Wang Z, Ma Y, Vignesh A, Hao X, Sun WH. Finely Tuned α,α′-Bis(arylimino)-2,3:5,6-bis(pentamethylene)pyridine-Based Practical Iron Precatalysts for Targeting Highly Linear and Narrow Dispersive Polyethylene Waxes with Vinyl Ends. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00562] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chantsalnyam Bariashir
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
- CAS Research/Education Center for Excellence in Molecular Sciences and International School, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Zheng Wang
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
- CAS Research/Education Center for Excellence in Molecular Sciences and International School, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Yanping Ma
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
| | - Arumugam Vignesh
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
| | - Xiang Hao
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
| | - Wen-Hua Sun
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
- CAS Research/Education Center for Excellence in Molecular Sciences and International School, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, People’s Republic of China
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20
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Zhang R, Ma Y, Han M, Solan GA, Pi Y, Sun Y, Sun W. Exceptionally high molecular weight linear polyethylene by using
N,N,N′‐
Co catalysts appended with a
N′
‐2,6‐bis{di(4‐fluorophenyl)methyl}‐4‐nitrophenyl group. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.5157] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Randi Zhang
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of ChemistryChinese Academy of Sciences Beijing 100190 China
- CAS Research/Education Center for Excellence in Molecular SciencesUniversity of Chinese Academy of Sciences Beijing 100049 China
| | - Yanping Ma
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of ChemistryChinese Academy of Sciences Beijing 100190 China
| | - Mingyang Han
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of ChemistryChinese Academy of Sciences Beijing 100190 China
- CAS Research/Education Center for Excellence in Molecular SciencesUniversity of Chinese Academy of Sciences Beijing 100049 China
| | - Gregory A. Solan
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of ChemistryChinese Academy of Sciences Beijing 100190 China
- Department of Chemistry, University of LeicesterUniversity Road Leicester LE1 7RH UK
| | - Yaqing Pi
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of ChemistryChinese Academy of Sciences Beijing 100190 China
| | - Yang Sun
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of ChemistryChinese Academy of Sciences Beijing 100190 China
| | - Wen‐Hua Sun
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of ChemistryChinese Academy of Sciences Beijing 100190 China
- CAS Research/Education Center for Excellence in Molecular SciencesUniversity of Chinese Academy of Sciences Beijing 100049 China
- State Key Laboratory for Oxo Synthesis and Selective OxidationLanzhou Institute of Chemical Physics, Chinese Academy of Sciences Lanzhou 730000 China
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21
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Activity and Thermal Stability of Cobalt(II)-Based Olefin Polymerization Catalysts Adorned with Sterically Hindered Dibenzocycloheptyl Groups. Molecules 2019; 24:molecules24102007. [PMID: 31130640 PMCID: PMC6572594 DOI: 10.3390/molecules24102007] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 05/23/2019] [Accepted: 05/24/2019] [Indexed: 11/24/2022] Open
Abstract
Five examples of unsymmetrical 2-(2,4-bis(dibenzocycloheptyl)-6-methylphenyl- imino)ethyl)-6-(1-(arylyimino)ethyl)pyridine derivatives (aryl = 2,6-Me2C6H3 in L1; 2,6-Et2C6H3 in L2; 2,6-i-Pr2C6H3 in L3; 2,4,6-Me3C6H2 in L4 and 2,6-Et2-4-MeC6H2 in L5) were prepared and characterized. Treatment with CoCl2 offered the corresponding cobalt precatalysts Co1–Co5, which were characterized by FT-IR and NMR spectroscopy as well as elemental analysis. The molecular structures of Co3 and Co4 determined by single crystal X-ray diffraction revealed distorted square pyramidal geometries with τ5 values of 0.052–0.215. Activated with either MAO or MMAO, the precatalysts displayed high activities in ethylene polymerization, where Co1 with the least bulky substituents exhibited a peak activity of 1.00 × 107 g PE mol−1 (Co) h−1 at 60 °C. With MAO as a cocatalyst, the activity was reduced only by one order of magnitude at 90 °C, which implies thermally stable active sites. The polymerization product was highly linear polyethylene with vinyl end groups. Co3 with the most sterically hindered active sites was capable of generating polyethylene of high molecular weight, reaching 6.46 × 105 g mol−1. Furthermore, high melting point and unimodal molecular weight distribution were observed in the resulting polyethylene. It must be stressed that the thermal stability of the catalyst and the molecular weight of the obtained polyethylene attain the highest values reported for the unsymmetrical 2,6-bis(imino)pyridylcobalt (II) chloride precatalysts.
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22
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Mahmood Q, Ma Y, Hao X, Sun W. Substantially enhancing the catalytic performance of
bis
(imino)pyridylcobaltous chloride pre‐catalysts adorned with benzhydryl and nitro groups for ethylene polymerization. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.4857] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Qaiser Mahmood
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular ScienceInstitute of Chemistry, Chinese Academy of Sciences Beijing 100190 China
- CAS Research/Education Center for Excellence in Molecular SciencesUniversity of Chinese Academy of Sciences Beijing 100049 China
| | - Yanping Ma
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular ScienceInstitute of Chemistry, Chinese Academy of Sciences Beijing 100190 China
- CAS Research/Education Center for Excellence in Molecular SciencesUniversity of Chinese Academy of Sciences Beijing 100049 China
| | - Xiang Hao
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular ScienceInstitute of Chemistry, Chinese Academy of Sciences Beijing 100190 China
- CAS Research/Education Center for Excellence in Molecular SciencesUniversity of Chinese Academy of Sciences Beijing 100049 China
| | - Wen‐Hua Sun
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular ScienceInstitute of Chemistry, Chinese Academy of Sciences Beijing 100190 China
- CAS Research/Education Center for Excellence in Molecular SciencesUniversity of Chinese Academy of Sciences Beijing 100049 China
- State Key Laboratory for Oxo Synthesis and Selective OxidationLanzhou Institute of Chemical Physics, Chinese Academy of Sciences Lanzhou 730000 China
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23
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Guo J, Wang Z, Zhang W, Oleynik II, Vignesh A, Oleynik IV, Hu X, Sun Y, Sun WH. Highly Linear Polyethylenes Achieved Using Thermo-Stable and Efficient Cobalt Precatalysts Bearing Carbocyclic-Fused NNN-Pincer Ligand. Molecules 2019; 24:molecules24061176. [PMID: 30934627 PMCID: PMC6471483 DOI: 10.3390/molecules24061176] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 03/20/2019] [Accepted: 03/21/2019] [Indexed: 11/16/2022] Open
Abstract
Six examples of 2-(1-arylimino)ethyl-9-arylimino-5,6,7,8-tetrahydrocycloheptapyridine-cobalt(II) chloride complexes, [2-(1-ArN)C2H3-9-ArN-5,6,7,8-C5H8C5H3N]CoCl2, (Ar = 2-(C5H9)-6-MeC6H3Co1, 2-(C6H11)-6-MeC6H3Co2, 2-(C8H15)-6-MeC6H3Co3, 2-(C5H9)-4,6-Me2C6H2Co4, 2-(C6H11)-4,6-Me2C6H2Co5, and 2-(C8H15)-4,6-Me2C6H2Co6), were synthesized by the direct reaction of the corresponding ortho-cycloalkyl substituted carbocyclic-fused bis(arylimino)pyridines (L1–L6) and cobalt(II) chloride in ethanol with good yields. All the synthesized ligands (L1–L6) and their corresponding cobalt complexes (Co1–Co6) were fully characterized by FT-IR, 1H/13C-NMR spectroscopy and elemental analysis. The crystal structure of Co2 and Co3 revealed that the ring puckering of both the ortho-cyclohexyl/cyclooctyl substituents and the one pyridine-fused seven-membered ring; a square-based pyramidal geometry is conferred around the metal center. On treatment with either methylaluminoxane (MAO) or modified methylaluminoxane (MMAO), all the six complexes showed high activities (up to 4.09 × 106 g of PE mol−1 (Co) h−1) toward ethylene polymerization at temperatures between 20 °C and 70 °C with the catalytic activities correlating with the type of ortho-cycloalkyl substituent: Cyclopentyl (Co1 and Co4) > cyclohexyl (Co2 and Co5) > cyclooctyl (Co3 and Co6) for either R = H or Me and afforded strictly linear polyethylene (Tm > 130 °C). The narrow unimodal distributions of the resulting polymers are consistent with single-site active species for the precatalyst. Furthermore, compared to the previously reported cobalt analogues, the titled precatalysts exhibited good thermo-stability (up to 70 °C) and possessed longer lifetime along with a higher molecular weight of PE (Mw: 9.2~25.3 kg mol−1).
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Affiliation(s)
- Jingjing Guo
- Beijing Key Laboratory of Clothing Materials R&D and Assessment, Beijing Engineering Research Center of Textile Nanofiber, School of Materials Science and Engineering, Beijing institute of Fashion Technology, Beijing 100029, China.
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
| | - Zheng Wang
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
| | - Wenjuan Zhang
- Beijing Key Laboratory of Clothing Materials R&D and Assessment, Beijing Engineering Research Center of Textile Nanofiber, School of Materials Science and Engineering, Beijing institute of Fashion Technology, Beijing 100029, China.
| | - Ivan I Oleynik
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Pr. Lavrentjeva 9, Novosibirsk 630090, Russia.
| | - Arumugam Vignesh
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
| | - Irina V Oleynik
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Pr. Lavrentjeva 9, Novosibirsk 630090, Russia.
| | - Xinquan Hu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China.
| | - Yang Sun
- 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.
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24
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Wang Z, Zhang R, Zhang W, Solan GA, Liu Q, Liang T, Sun WH. Enhancing thermostability of iron ethylene polymerization catalysts through N,N,N-chelation of doubly fused α,α′-bis(arylimino)-2,3:5,6-bis(hexamethylene)pyridines. Catal Sci Technol 2019. [DOI: 10.1039/c9cy00293f] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
At temperatures up to 80 °C, high catalytic activity and high molecular weight PE was achievable using the Fe-catalyst depicted.
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Affiliation(s)
- Zheng Wang
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Randi Zhang
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Wenjuan Zhang
- Beijing Key Laboratory of Clothing Materials R&D and Assessment
- Beijing Engineering Research Center of Textile Nanofiber
- School of Materials Science and Engineering
- Beijing institute of Fashion Technology
- Beijing 100029
| | - Gregory A. Solan
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Qingbin Liu
- College of Chemistry and Material Science
- Hebei Normal University
- Shijiazhuang 050024
- China
| | - 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
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25
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Bariashir C, Wang Z, Suo H, Zada M, Solan GA, Ma Y, Liang T, Sun WH. Narrow dispersed linear polyethylene using cobalt catalysts bearing cycloheptyl-fused bis(imino)pyridines; probing the effects of ortho-benzhydryl substitution. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2018.11.010] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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26
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Wang Z, Ma Y, Guo J, Liu Q, Solan GA, Liang T, Sun WH. Bis(imino)pyridines fused with 6- and 7-membered carbocylic rings as N,N,N-scaffolds for cobalt ethylene polymerization catalysts. Dalton Trans 2019; 48:2582-2591. [DOI: 10.1039/c8dt04892d] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Mixed carbocyclic-fused bis(arylimino)pyridine-cobalt(ii) chlorides, on activation with either MAO or MMAO, displayed high activities for ethylene polymerization affording linear polyethylene waxes; high selectivity for vinyl end-groups is a feature of MAO-promoted systems.
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Affiliation(s)
- Zheng Wang
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- 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
| | - Jingjing Guo
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Qingbin Liu
- College of Chemistry and Materials Science
- Hebei Normal University
- Shijiazhuang 050024
- China
| | - Gregory A. Solan
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - 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
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27
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Zhang R, Han M, Ma Y, Solan GA, Liang T, Sun WH. Steric and electronic modulation of iron catalysts as a route to remarkably high molecular weight linear polyethylenes. Dalton Trans 2019; 48:17488-17498. [DOI: 10.1039/c9dt03880a] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The depicted N,N,N-iron(ii) chloride precatalysts, upon activation with either MAO or MMAO, not only display excellent thermal stability but are also capable of generating exceptionally high molecular weight linear polyethylenes.
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Affiliation(s)
- Randi Zhang
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Mingyang Han
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Yanping Ma
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Gregory A. Solan
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Tongling Liang
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Wen-Hua Sun
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
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28
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Mahmood Q, Yue E, Guo J, Zhang W, Ma Y, Hao X, Sun WH. Nitro-functionalized bis(imino)pyridylferrous chlorides as thermo-stable precatalysts for linear polyethylenes with high molecular weights. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.11.016] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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29
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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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30
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Wang Z, Solan GA, Zhang W, Sun WH. Carbocyclic-fused N,N,N-pincer ligands as ring-strain adjustable supports for iron and cobalt catalysts in ethylene oligo-/polymerization. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2018.02.016] [Citation(s) in RCA: 140] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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31
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Mahmood Q, Guo J, Zhang W, Ma Y, Liang T, Sun WH. Concurrently Improving the Thermal Stability and Activity of Ferrous Precatalysts for the Production of Saturated/Unsaturated Polyethylene. Organometallics 2018. [DOI: 10.1021/acs.organomet.7b00909] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Qaiser Mahmood
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
- CAS Research/Education Center for Excellence in Molecular Sciences and International School, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Jingjing Guo
- Beijing Key Laboratory of Clothing Materials R&D and Assessment, Beijing Engineering Research Center of Textile Nanofiber, School of Materials Science and Engineering, Beijing Institute of Fashion Technology, Beijing 100029, People’s Republic of China
| | - Wenjuan Zhang
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
- Beijing Key Laboratory of Clothing Materials R&D and Assessment, Beijing Engineering Research Center of Textile Nanofiber, School of Materials Science and Engineering, Beijing Institute of Fashion Technology, Beijing 100029, People’s Republic of China
| | - Yanping Ma
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
| | - Tongling Liang
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People’s Republic of 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, People’s Republic of China
- CAS Research/Education Center for Excellence in Molecular Sciences and International School, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
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32
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Wang Z, Solan GA, Mahmood Q, Liu Q, Ma Y, Hao X, Sun WH. Bis(imino)pyridines Incorporating Doubly Fused Eight-Membered Rings as Conformationally Flexible Supports for Cobalt Ethylene Polymerization Catalysts. Organometallics 2018. [DOI: 10.1021/acs.organomet.7b00809] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Zheng 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, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Gregory A. Solan
- Key
Laboratory of Engineering Plastics and Beijing National Laboratory
for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- Department
of Chemistry, University of Leicester, University Road, Leicester LE1 7RH, United Kingdom
| | - Qaiser Mahmood
- 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
| | - Qingbin Liu
- College
of Chemistry and Material Science, Hebei Normal University, Shijiazhuang 050024, 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
| | - Xiang Hao
- 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
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33
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Suo H, Oleynik IV, Huang C, Oleynik II, Solan GA, Ma Y, Liang T, Sun WH. ortho-Cycloalkyl substituted N,N'-diaryliminoacenaphthene-Ni(ii) catalysts for polyethylene elastomers; exploring ring size and temperature effects. Dalton Trans 2017; 46:15684-15697. [PMID: 29067369 DOI: 10.1039/c7dt03362a] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A family of six unsymmetrical N,N'-diiminoacenaphthene-nickel(ii) bromide complexes, [1-{2,6-(Ph2CH)2-4-MeC6H2N}-2-(ArN)C2C10H6]NiBr2 (Ar = 2-(C6H11)-6-MeC6H2Ni1, 2-(C5H9)-6-MeC6H2Ni2, 2-(C8H15)-6-MeC6H2Ni3, 2-(C6H11)-4,6-Me2C6H2Ni4, 2-(C5H9)-4,6-Me2C6H2Ni5, 2-(C8H15)-4,6-Me2C6H2Ni6), each bearing one ring-size variable 4-R-2-methyl-6-cycloalkyl-substituted N-aryl group and one N'-4-methyl-2,6-dibenzhydrylphenyl group, have been prepared and fully characterized. The molecular structures of Ni1, Ni2, Ni3 and Ni5 reveal distorted tetrahedral geometries with different degrees of steric protection imparted by the two inequivalent N-aryl groups. On activation with either EASC or MMAO, all the precatalysts are highly active (up to 17.45 × 106 g PE mol-1 (Ni) h-1) for ethylene polymerization at 20-50 °C with their activities correlating with the type of cycloalkyl ortho-substituent: cyclooctyl (Ni6, Ni3) > the cyclopentyl (Ni5, Ni2) > cyclohexyl (Ni4, Ni1) for either R = H or Me. Moderately branched to hyperbranched polyethylenes (Tm's as low as 44.2 °C) can be obtained with molecular weights in the range 2.14-6.68 × 105 g mol-1 with the branching content enhanced by the temperature of the polymerization. Dynamic mechanical analysis (DMA) and monotonic tensile stress-strain tests have been employed on the polyethylene samples and reveal the more branched materials to show good elastic recovery properties (up to 75.5%).
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Affiliation(s)
- Hongyi Suo
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
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Bariashir C, Wang Z, Du S, Solan GA, Huang C, Liang T, Sun WH. Cycloheptyl-fused NNO-ligands as electronically modifiable supports for M(II) (M = Co, Fe) chloride precatalysts; probing performance in ethylene oligo-/polymerization. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/pola.28767] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Chantsalnyam Bariashir
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences; 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
| | - Zheng Wang
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences; 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
| | - Shizhen Du
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences; Institute of Chemistry, Chinese Academy of Sciences; Beijing 100190 China
| | - Gregory A. Solan
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences; Institute of Chemistry, Chinese Academy of Sciences; Beijing 100190 China
- Department of Chemistry; University of Leicester, University Road; Leicester LE1 7RH United Kingdom
| | - Chuanbing Huang
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences; 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
| | - Tongling Liang
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences; Institute of Chemistry, Chinese Academy of Sciences; Beijing 100190 China
| | - Wen-Hua Sun
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences; 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
- 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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Wang X, Fan L, Ma Y, Guo CY, Solan GA, Sun Y, Sun WH. Elastomeric polyethylenes accessible via ethylene homo-polymerization using an unsymmetrical α-diimino-nickel catalyst. Polym Chem 2017. [DOI: 10.1039/c7py00434f] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Elastomeric polyethylenes, with good elastic recovery and high elongation at break, have been prepared using a new family of unsymmetrical α-diimino-nickel catalysts that display high activities and high thermal stability.
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Affiliation(s)
- Xinxin Wang
- School of Chemistry and Chemical Engineering and CAS Research/Education Center for Excellence in Molecular Sciences
- University of Chinese Academy of Sciences
- Beijing 100049
- China
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences
| | - Linlin Fan
- School of Chemistry and Chemical Engineering and CAS Research/Education Center for Excellence in Molecular Sciences
- University of Chinese Academy of Sciences
- Beijing 100049
- China
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences
| | - Yanping Ma
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Cun-Yue Guo
- School of Chemistry and Chemical Engineering and CAS Research/Education Center for Excellence in Molecular Sciences
- University of Chinese Academy of Sciences
- Beijing 100049
- China
| | - Gregory A. Solan
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Yang Sun
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Wen-Hua Sun
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
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