期刊信息

  • 刊名： 河北师范大学学报（自然科学版）Journal of Hebei Normal University (Natural Science)
  • 主办： 河北师范大学
  • ISSN： 1000-5854
  • CN： 13-1061/N
  • 中国科技核心期刊
  • 中国期刊方阵入选期刊
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  • 华北优秀期刊
  • 河北省优秀科技期刊

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基于{V₁₈O₄₂}多钒氧簇的设计合成及其催化Knoevenagel缩合反应性能

  • （河北师范大学 化学与材料科学学院,河北省无机纳米材料重点实验室,国家实验化学教育示范中心,河北 石家庄 050024）
  • DOI： 10.13763/j.cnki.jhebnu.nse.202303003

Synthesis of Polyoxovanadate Based on {V₁₈O₄₂} and Its Catalytic Performance for Knoevenagel Condensation Reaction

摘要/Abstract

摘要：

采用水热技术合成一例含钴的有机无机杂化多钒氧簇,其分子式为[Co(C₈H₂₀N₄)]₄ [VIV₁₃VV₅O₄₂(Cl)]·6H₂O(1). 研究表明,化合物1中[VIV₁₃VV₅O₄₂(Cl)]⁸⁻阴离子簇表面的富氧原子使其具有一定的Lewis碱性,其在苯甲醛与丙二腈的Knoevengel缩合反应中表现出优异的催化性能. 室温下,30 min内反应转化率和选择性可分别达到98 %和100 %; 催化剂回收后至少可以重复使用4次,具有较好的循环稳定性.

Abstract：

A new organic-inorganic hybrid polyoxovanadate [Co(C₈H₂₀N₄)]₄[VIV₁₃VV₅O₄₂(Cl)]· 6H₂O(1) has been synthesized by hydrothermal synthesis. Research shows that the polyanionic cluster [VIV₁₃VV₅O₄₂(Cl)]⁸⁻ in compound 1 has an exposed nucleophilic surface due to external oxygen atoms,which makes it possess a certain Lewis basicity. Therefore,compound 1 exhibited excellent catalytic performance in the Knoevengel condensation reaction of benzaldehyde and malononitrile. The conversion and selectivity of condensation reaction can reach 98 % and 100 % within 30 min at room temperature. Compound 1 shows good cycle stability for the current catalytic reaction and can be reused for at least 4 times after recovery.

关键词

关键词： 多钒氧簇 ; 水热合成 ; 非均相催化剂 ; Knoevenagel缩合反应
Key words： polyoxovanadate ; hydrothermal synthesis ; heterogeneous catalyst ; Knoevenagel condensation reaction

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