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

被引：12

作者：

Lin, Wenhua ^{[1
,2
,3
]}

Zhang, Liping ^{[1
]}

Gao, Jiahao ^{[2
,3
]}

Zhang, Qiuyue ^{[2
,3
]}

Ma, Yanping ^{[2
,3
]}

Liu, Hua ^{[2
,3
]}

Sun, Wen-Hua ^{[2
,3
,4
]}

机构：

[1] Jiangnan Univ, Sch Text Sci & Engn, Wuxi 214122, Jiangsu, Peoples R China

[2] Chinese Acad Sci, Inst Chem, Key Lab Engn Plast, Beijing 100190, Peoples R China

[3] Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China

[4] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China

来源：

MOLECULES | 2020年 / 25卷 / 18期

基金：

中国国家自然科学基金;

关键词：

linear polyethylenes; cobalt precatalyst; iron precatalyst; thermostable and efficient catalysis; correlation between structure and activity; DICHLORIDES SYNTHESIS; THERMAL-STABILITY; 2,6-BIS(IMINO)PYRIDYL IRON; OLEFIN POLYMERIZATION; LINEAR POLYETHYLENES; COBALT COMPLEXES; ALPHA-DIIMINE; II COMPLEXES; CATALYSTS; BIS(IMINO)PYRIDINES;

D O I：

10.3390/molecules25184244

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

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 wereCo3andCo5complexes, 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 x 10(6)g(PE) mol(-1)(Co) h(-1)byCo4and 17.0 x 10(6)g(PE) mol(-1)(Fe) h(-1)byFe4. Bulkier substituents are favored for increasing the molecular weights of the resultant polyethylenes, such as 25.6 kg mol(-1)obtained byCo3and 297 kg mol(-1)obtained byFe3. A narrow polydispersity of polyethylenes was observed by iron precatalysts activated by MMAO, indicating a single-site active species formed.

引用

页数：17