Magnetite nanoparticles immobilized on hydrophilic polyelectrolyte-grafted carbon nanotube as efficient organic-inorganic hybrid heterogeneous catalyst for Knoevenagel condensation in aqueous medium

被引：1

作者：

Geng, Lin ^{[1
]}

Tian, Yubin ^{[1
]}

Ding, Rui ^{[1
]}

Zhao, Chunyan ^{[1
]}

Yang, Wenzhong ^{[1
]}

Shi, Qixun ^{[1
]}

Xu, Hui ^{[1
,2
,3
]}

机构：

[1] Nanjing Tech Univ, Inst Adv Synth, Sch Chem & Mol Engn, Nanjing 211816, Peoples R China

[2] Nanjing Univ Posts & Telecommun, State Key Lab Organ Elect & Informat Displays, 9 Wenyuan Rd, Nanjing 210023, Peoples R China

[3] Nanjing Univ Posts & Telecommun, Inst Adv Mat IAM, 9 Wenyuan Rd, Nanjing 210023, Peoples R China

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2024年 / 685卷

基金：

中国国家自然科学基金;

关键词：

Heterogeneous catalysis; Carbon nanotube; Poly(2-(dimethylamino)ethyl methacrylate); Iron oxide; Knoevenagel condensation; ONE-POT SYNTHESIS; SUBSTITUTED; 2-AMINO-2-CHROMENES;

D O I：

10.1016/j.colsurfa.2024.133283

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this work, a novel organic-inorganic hybrid heterogeneous catalyst was fabricated for Knoevenagel condensation. First, the surface of carbon nanotube (CNT) was covalently functionalized with poly(2-(dimethylamino) ethyl methacrylate) (PDMAEMA) polyelectrolyte (i.e., organic polybase) through the surface-initiated atom transfer radical polymerization (SI-ATRP) method. Subsequently, magnetic iron oxide nanoparticles (Fe3O4 NPs) (i.e., inorganic Lewis acid) are densely and homogeneously grown on the CNT surface using the CNT-gPDMAEMA template. The as-prepared acid-base bifunctional catalyst (i.e., CNT-g-PDMAEMA/Fe3O4NPs) was investigated in the model reaction, i.e., Knoevenagel condensation between naphthol, malononitrile and benzaldehyde. The CNT-g-PDMAEMA/Fe3O4NPs catalyst shows high catalytic activity in the Knoevenagel condensation between naphthol, malononitrile , benzaldehyde due to its unique structure and specific chemical constitution. In addition, this acid-base bifunctional catalyst can be readily recovered with an applied magnetic field and reused with negligible loss in the catalytic activity even after six cycles.

引用

页数：8