Chromium Catalysts for Selective Ethylene Oligomerization Featuring Binuclear PNP Ligands

被引：1

作者：

Meng, Xiangyang ^{[1
]}

Ding, Zhiqiang ^{[1
]}

Gao, Huan ^{[1
]}

Ma, Zhe ^{[1
]}

Pan, Li ^{[1
]}

Wang, Bin ^{[1
]}

Li, Yuesheng ^{[1
]}

机构：

[1] Tianjin Univ, Sch Mat Sci & Engn, Tianjin Key Lab Composite & Funct Mat, Tianjin 300350, Peoples R China

来源：

MOLECULES | 2024年 / 29卷 / 09期

基金：

中国国家自然科学基金;

关键词：

PNP ligands; ethylene oligomerization; 1-octene; TRI-/TETRAMERIZATION; POLYOLEFIN ELASTOMERS; TETRAMERIZATION; 1-OCTENE; TRIMERIZATION; BACKBONE; DESIGN;

D O I：

10.3390/molecules29092158

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 novel binuclear PNP ligands based on the cyclohexyldiamine scaffold were synthesized for this study. The experimental results showed that positioning the two PNP sites at the para-positions of the cyclohexyl framework led to a significant enhancement in the catalytic activity for selective tri/tetramerization of ethylene. The PNP/Cr(acac)3/MAO(methylaluminoxane) catalytic system exhibited relatively high catalytic activity (up to 3887.7 kg<middle dot>g-1<middle dot>h-1) in selective ethylene oligomerization with a total selectivity of 84.5% for 1-hexene and 1-octene at 40 degrees C and 50 bar. The relationship between the ligand structure and ethylene oligomerization performance was further explored using density functional theory calculations.

引用

页数：14

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