Synergistic catalysis of one-pot cascade reactions by acidic and basic binary porous polymers

被引：28

作者：

Wang, Xiaochen ^{[1
,2
]}

Zhang, Lingyu ^{[1
]}

Guo, Zengjing ^{[1
]}

Shi, Yuming ^{[1
]}

Zhou, Yu ^{[1
]}

Wang, Jun ^{[1
]}

机构：

[1] Nanjing Tech Univ, State Key Lab Mat Oriented Chem Engn, Coll Chem Engn, Nanjing 210009, Jiangsu, Peoples R China

[2] Hefei Univ, Dept Chem & Mat Engn, Hefei 230022, Anhui, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2019年 / 478卷

关键词：

Porous polymer; Heterogeneous catalysis; Acid-base binary catalysts; Cascade reaction; HETEROGENEOUS CATALYSTS; MESOPOROUS SILICA; BIFUNCTIONAL CATALYST; FUNCTIONALIZATION; EFFICIENT; DESIGN; SITES; AMINE; METAL; CORE;

D O I：

10.1016/j.apsusc.2019.01.217

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：

Acidic and basic porous polymers were facilely prepared through the radical copolymerization of target monomers and the crosslinker divinylbenzene (DVB), respectively. Combination of these polymers endowed highly efficient, heterogeneous recyclable acid-base binary catalysts for cascade deacetalization-Knoevenagel reaction, offering high yield and stable reusability. Binary polymers with strong acid sites and superior base sites afforded an unprecedented turnover frequency (TOF) in the condensation of benzaldehyde dimethylacetal and nitriles (285 h(-1) for malononitrile and 57 h(-1) for inert methylene substrate ethyl cyanoacetate). The excellent synergistically catalytic performance was ascribed to the unique self-protection effect of the in-situ formed acid and base sites embedded in the polymeric network. This study provided a facile, versatile and efficient strategy towards acid-base bifunctional heterogeneous catalysts by combining acidic and basic porous polymers.

引用

页码：221 / 229

页数：9

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