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Wu R, Niu Z, Huang L, Yang Y, Xia Z, Fan W, Dai Q, Cui L, He J, Bai C. Thermally stable vanadium complexes supported by the iminophenyl oxazolinylphenylamine ligands: synthesis, characterization and application for ethylene (co-)polymerization. Dalton Trans 2021; 50:16067-16075. [PMID: 34633403 DOI: 10.1039/d1dt03004c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
In this work, a series of oxovanadium complexes bearing the ligands (S,E)-(+)-2, 6-dialkyl-N-(2-((2-(4-isopropyl-4,5-dihydrooxazole-2-yl)phenyl)amino)benzylidene)aniline (dialkyl = dimethyl (V1), diethyl (V2), and isopropyl (V3)) have been synthesized and characterized by FTIR spectroscopy and elemental analysis. Moreover, the molecular structures of complexes V2 and V3 were defined by X-ray diffraction. On activation with ethylaluminium sesquichloride (Al2Et3Cl3), these complexes exhibited high activity towards ethylene polymerization (up to 1.39 × 107 g molv-1 h-1) and showed excellent thermal stability (up to 60 °C). The obtained polyethylene had a moderate molecular weight (21.9 × 104 to 66.4 × 104 g mol-1) and exhibited narrow distribution (1.91 to 2.86) and unimodal features. The effect of the substituents on the ligands was also investigated in detail. The compound bearing the diisopropyl group showed the highest activity toward ethylene polymerization as the bimolecular deactivation of the catalyst can be effectively inhibited by the steric hindrance of the ortho-substituent on aniline. The complex V2 with moderate steric hindrance was also evaluated as a catalyst for the copolymerization of ethylene with norbornene and showed moderate to high activity.
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Affiliation(s)
- Ruiyao Wu
- Key Laboratory of High-Performance Synthetic Rubber and Its Composite Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China. .,University of Science and Technology of China, 230026, Hefei, Anhui, China
| | - Zhen Niu
- Key Laboratory of High-Performance Synthetic Rubber and Its Composite Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China. .,University of Science and Technology of China, 230026, Hefei, Anhui, China
| | - Lingyun Huang
- Key Laboratory of High-Performance Synthetic Rubber and Its Composite Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China. .,University of Science and Technology of China, 230026, Hefei, Anhui, China
| | - Yinxin Yang
- Key Laboratory of High-Performance Synthetic Rubber and Its Composite Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China. .,University of Science and Technology of China, 230026, Hefei, Anhui, China
| | - Zhu Xia
- Key Laboratory of High-Performance Synthetic Rubber and Its Composite Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China. .,University of Science and Technology of China, 230026, Hefei, Anhui, China
| | - Weifeng Fan
- Key Laboratory of High-Performance Synthetic Rubber and Its Composite Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China.
| | - Quanquan Dai
- Key Laboratory of High-Performance Synthetic Rubber and Its Composite Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China.
| | - Long Cui
- Key Laboratory of High-Performance Synthetic Rubber and Its Composite Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China.
| | - Jianyun He
- Key Laboratory of High-Performance Synthetic Rubber and Its Composite Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China.
| | - Chenxi Bai
- Key Laboratory of High-Performance Synthetic Rubber and Its Composite Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China. .,University of Science and Technology of China, 230026, Hefei, Anhui, China
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Soshnikov IE, Semikolenova NV, Bryliakov KP, Zakharov VA, Talsi EP. Vanadium(III)-Catalyzed Polymerization of α-Olefins: Detailed NMR Spectroscopic Characterization of Intermediates Modeling the Active Species of Polymerization. ChemCatChem 2017. [DOI: 10.1002/cctc.201601634] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Igor E. Soshnikov
- Federal Agency for Scientific Organizations, Siberian Branch of the Russian Academy of Sciences; Boreskov Institute of Catalysis; 630090 Novosibirsk pr. Akad. Lavrent'eva, 5 Russian Federation
- The Ministry of Education and Science of the Russian Federation; Novosibirsk State University; 630090 Novosibirsk Pirogova street, 2 Russian Federation
| | - Nina V. Semikolenova
- Federal Agency for Scientific Organizations, Siberian Branch of the Russian Academy of Sciences; Boreskov Institute of Catalysis; 630090 Novosibirsk pr. Akad. Lavrent'eva, 5 Russian Federation
| | - Konstantin P. Bryliakov
- Federal Agency for Scientific Organizations, Siberian Branch of the Russian Academy of Sciences; Boreskov Institute of Catalysis; 630090 Novosibirsk pr. Akad. Lavrent'eva, 5 Russian Federation
- The Ministry of Education and Science of the Russian Federation; Novosibirsk State University; 630090 Novosibirsk Pirogova street, 2 Russian Federation
| | - Vladimir A. Zakharov
- Federal Agency for Scientific Organizations, Siberian Branch of the Russian Academy of Sciences; Boreskov Institute of Catalysis; 630090 Novosibirsk pr. Akad. Lavrent'eva, 5 Russian Federation
- The Ministry of Education and Science of the Russian Federation; Novosibirsk State University; 630090 Novosibirsk Pirogova street, 2 Russian Federation
| | - Evgenii P. Talsi
- Federal Agency for Scientific Organizations, Siberian Branch of the Russian Academy of Sciences; Boreskov Institute of Catalysis; 630090 Novosibirsk pr. Akad. Lavrent'eva, 5 Russian Federation
- The Ministry of Education and Science of the Russian Federation; Novosibirsk State University; 630090 Novosibirsk Pirogova street, 2 Russian Federation
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