Chem. J. Chinese Universities ›› 2010, Vol. 31 ›› Issue (3): 592.

• Articles • Previous Articles     Next Articles

Synthesis and Characterization of New Organic-inorganic Based Catalyst——Effect of Steric Hindrance on Catalytic Performance

SHAO Yan-Qiu1,2, WANG Hong-Su1, GUAN Jing-Qi1, YU Xiao-Fang1, LIU Heng1, KAN Qiu-Bin1*   

  1. 1. College of Chemistry, Jilin University, Changchun 130021, China;
    2. Department of Chemistry, Mudanjiang Teachers College, Mudanjiang 157012, China
  • Received:2009-05-12 Online:2010-03-10 Published:2010-03-10
  • Contact: KAN Qiu-Bin. E-mail: qkan@jlu.edu.cn
  • Supported by:

    国家自然科学基金(批准号: 20673046), 牡丹江师范学院博士科研启动基金项目(批准号: MSB201001)和青年学术骨干项目(批准号: G200902)资助.

Abstract:

Two different hybrid secondary amine-functionalized mesoporous SBA-15 silica materials were synthesized by a direct synthesis method. X-ray diffraction(XRD), N2 physisorption and transmission electron micrographs(TEM) showed that the prepared materials possessed similar mesoporous structure to pure siliceous SBA-15. Thermogravimetric analysis(TGA), FTIR and elemental analysis of nitrogen indicated the successful introduction of corresponding organic functional groups into mesoporous materials. In the Aldol condensation of acetone with 4-nitrobenzaldehyde, two different hybrid secondary amine-functionalized mesoporous materials displayed enhanced catalytic performance in comparison to primary amine-functionalized materials. The possible reason is that the presence of organic functional groups with larger steric hindrance led to the enhanced catalytic performance of basic amino groups.

Key words: Mesopore; Basic catalyst; Steric hindrance

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