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Immobilization of a molybdenum complex on the surface of magnetic nanoparticles for the catalytic epoxidation of olefins

Zare, M ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1039/c5nj02218e
  3. Publisher: Royal Society of Chemistry
  4. Abstract:
  5. Novel organic-inorganic hybrid heterogeneous nanocatalysts were obtained by covalent anchoring of a molybdenum(vi) complex of salicylidene 2-picoloyl hydrazine, MoO2(sal-phz)(CH3OH), (1) on the surface of magnetic nanoparticles functionalized by one of two routes: in the first method, the surface of magnetic nanoparticles is directly modified with 3-chloropropyltrimethoxysilane yielding 1A. In the second method, magnetic nanoparticles were silica-coated with tetraethoxysilane and then with 3-chloropropyltrimethoxysilane yielding the intermediate 2B. Then complex 1 was grafted on the surface of 1A or 2B through covalent interaction yielding 2A or 3B, respectively. The nanocatalysts 2A and 3B were characterized by FT-IR, XRD, SEM, TGA, EDX and vibrating sample magnetometry techniques. Nanocomposite 2A shows a much higher catalytic activity and stability in liquid phase epoxidation reactions, with t-BuOOH as the oxidant, compared to that of 3B. Additionally, the results of comparative study show that 2A is more active and reusable than the Mo complex immobilized SBA-15
  6. Keywords:
  7. 1 Heptene ; 1 Octene ; 3 Chloropropyltrimethoxysilane ; 4 Methylstyrene ; Alkene ; Alpha methylstyrene ; Cyclohexene ; Cyclooctene ; Limonene ; Magnetic nanoparticle ; Mesoporous silica nanoparticle ; Microsphere ; Molybdenum complex ; Silicon dioxide ; Styrene ; Tetraethoxysilane ; Unclassified drug ; Absorption ; Article ; Catalysis ; Epoxidation ; Infrared spectroscopy ; Magnetometry ; Priority journal
  8. Source: New Journal of Chemistry ; Volume 40, Issue 2 , 2016 , Pages 1580-1586 ; 11440546 (ISSN)
  9. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84957916617&doi=10.1039%2fc5nj02218e&partnerID=40&md5=0a4fb1daa8749060c573e50fc3729e9f