Difunctionalized indol-2-yl-ligated bimetallic rare-earth metal complexes: synthesis, characterization and high activity towards polymerization of 2-vinylpyridine

被引：1

作者：

Zhao, Zhiwei ^{[1
]}

Tong, Yao ^{[1
]}

Liu, Chencheng ^{[1
]}

Huang, Zeming ^{[1
]}

Wang, Shaowu ^{[1
]}

Wang, Fenhua ^{[1
]}

机构：

[1] Anhui Polytech Univ, Sch Chem & Environm Engn, Wuhu 241000, Anhui, Peoples R China

来源：

NEW JOURNAL OF CHEMISTRY | 2024年 / 48卷 / 33期

基金：

中国国家自然科学基金;

关键词：

APPENDED INDOLYL LIGANDS; CATALYTIC-ACTIVITY; PRECISION POLYMERIZATION; HAPTICITIES; REACTIVITY;

D O I：

10.1039/d4nj02131b

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A series of bimetallic rare-earth complexes {[mu-eta 1:(mu-eta 1:eta 1):eta 1-1-(2-C5H4N)-3-(2-C7H4NS)C8H4N]RE(CH2SiMe3)2}2 (RE = Y(7a), Er(7b), Yb(7c), Lu(7d)) were synthesized by treatment of rare-earth metal trialkyl complexes RE(CH2SiMe3)3(THF)2 with one equiv. of the proligand 1-(2-C5H4N)-3-(2-C7H4NS)C8H5N (6) in good isolated yields. Complex 7c can be converted to the divalent rare-earth metal complexes (eta 4:sigma:kappa 1-L)2YbII [L = 1-(2-C5H4N)-3-(2-C7H4NS)C8H4N(CHSiMe3)] (8) at elevated temperature in toluene solution. Complexes 7a, 7d and 8 were characterized by NMR spectroscopy. Additionally, the yttrium (7a), erbium (7b) and lutetium (7d) complexes exhibited high activity in the polymerization of 2-vinylpyridine with isotactic selectivity and high molecular weight. A series of difunctionalized rare-earth metal alkyl complexes bearing 1-(2-pyridinyl)-3-(2-benzothiazolyl) indol-2-yl ligand were prepared and applied for polymerization of 2VP with high isotactic selectivity and high molecular weight.

引用

页码：14690 / 14696

页数：7

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