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Design and Structural Study of Functionalized Nanoporous Catalysts Confined with Ionic Liquids and Their Applications in Some Organic Transformations

Vafaeezadeh, Majid | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 46164 (03)
  4. University: Sharif University of Technology
  5. Department: Chemistry
  6. Advisor(s): Mahmoodi Hashemi, Mohammad
  7. Abstract:
  8. The current thesis deals with designing of functionalized nanoporous catalysts modified with organic groups and ionic liquids and their applications for some challenging organic reactions such as synthesis of adipic acid and fatty acid esterifications. In this condition the catalysts show enhanced activity since the hydrophobicity of the surface can tune by applying organic groups. In this regard, oxidation of cyclohexene was performed using hydrogen peroxide as oxidant in the present of tungstate based task–specific ionic liquids and silica–functionalized ammonium tungstate as green catalysts. The results indicate that adipic acid achieves in high yield with excellent selectivity. Additionally, the applied silica–functionalized ammonium tungstate catalyst reuses for times with high activity. A heterogeneous catalyst with two Brønsted acidic species and silica supported Brønsted acidic ionic liquid are use as efficient catalysts for fatty acid esterification with ethanol. In these conditions high yield of esters are obtained without using additional water-removal step(s). The thesis also deals with application of silica–supported dual Brønsted acidic ionic liquid as highly efficient method for green thioacetalization of carbonyl compounds in water as solvent. The structures of the catalysts are modelized using novel computational technique to interpret the properties and giving more realistic structural information
  9. Keywords:
  10. Computational Chemistry ; Ionic Liquids ; Biodiesel ; Bronsted Acid ; Adipic Acid ; Catalyst Modeling

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