Advancing polyethylene properties by incorporating NO2 moiety in 1,2-bis(arylimino)acenaphthylnickel precatalysts: synthesis, characterization and ethylene polymerization | |
Department | OSSO国家重点实验室 |
Qaiser Mahmood1,2; Zeng, Yanning1; Wang, Xinxin1; Sun, Yang1; Sun WH(孙文华)1,2,3; Sun WH(孙文华) | |
2017 | |
Source Publication | Dalton Transactions |
ISSN | 1477-9226 |
Volume | 46Issue:21Pages:6934-6947 |
Abstract | A new family of nickel halides (bromides Ni1–Ni5 and chlorides Ni6–Ni10) ligated by 1-(2,6-dibenzhydryl-4-nitrophenylimino)-2-(arylimino)acenaphthylene (Aryl = 2,6-Me2C6H3L1, 2,6-Et2C6H3L2, 2,6-iPr2C6H3L3, 2,4,6-Me3C6H2L4, and 2,6-Et2-4-MeC6H2L5) have been prepared and well characterized, and the scope of their catalytic properties toward the polymerization of ethylene has been investigated. Upon activation with either Et2AlCl or EASC, the nickel bromide complexes displayed better activities than their nickel chloride counterparts and produced higher-molecular-weight polyethylene in the range of 106 g mol−1 with a very narrow range of molecular weight distributions. In comparison with reference precatalysts with non-nitro substituents (CH3, F or Cl), the title complexes experienced a modest negative effect on catalytic activity upon replacement with a NO2 moiety (activity up to 4.61 × 106 g PE (mol Ni)−1 h−1 at 20 °C). Conversely, the NO2 moiety exerted a positive effect to increase the molecular weight of the resulting polyethylene, and Ni4/Et2AlCl gave polyethylene with a maximum molecular weight of as high as 32.8 × 105 g mol−1, which is not only the highest among the title complexes but also higher than any literature values reported with 1,2-diiminoacenaphthylnickel halides. |
Subject Area | 物理化学与绿色催化 |
DOI | 10.1039/c7dt01295k |
Funding Organization | the National Natural Science Foundation of China (No. 21374123;U1362204);QM is grateful for the CAS-TWAS president’s fellowship |
Indexed By | SCI |
If | 4.029 |
Language | 英语 |
compositor | 第三作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/21989 |
Collection | 羰基合成与选择氧化国家重点实验室(OSSO) |
Corresponding Author | Sun WH(孙文华) |
Affiliation | 1.Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China 2.CAS Research/Education Center for Excellence in Molecular Sciences and International School, University of Chinese Academy of Sciences, Beijing 100049, China 3.State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China |
Recommended Citation GB/T 7714 | Qaiser Mahmood,Zeng, Yanning,Wang, Xinxin,et al. Advancing polyethylene properties by incorporating NO2 moiety in 1,2-bis(arylimino)acenaphthylnickel precatalysts: synthesis, characterization and ethylene polymerization[J]. Dalton Transactions,2017,46(21):6934-6947. |
APA | Qaiser Mahmood,Zeng, Yanning,Wang, Xinxin,Sun, Yang,Sun WH,&孙文华.(2017).Advancing polyethylene properties by incorporating NO2 moiety in 1,2-bis(arylimino)acenaphthylnickel precatalysts: synthesis, characterization and ethylene polymerization.Dalton Transactions,46(21),6934-6947. |
MLA | Qaiser Mahmood,et al."Advancing polyethylene properties by incorporating NO2 moiety in 1,2-bis(arylimino)acenaphthylnickel precatalysts: synthesis, characterization and ethylene polymerization".Dalton Transactions 46.21(2017):6934-6947. |
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