Synthesis, Characterization And Catalytic Application Of ordered Mesoporous Silica Nanocomposites Functionalized with Chloroacetic Acid (SBA-15/CA)
Amit Dubey, Divya Sachdev and Neel Mani Srivasatava
Volume 4, Issue 1, Page 39-45, Year 2013, 'ICNANO 2011' | DOI: 10.5185/amlett.2013.icnano.113
Keywords: Heterogeneous catalysis; chloroacetic acid; SBA-15; Knoveneganel condensation.
In order to develop the mild acidic nanocatalyst, ordered mesoporous silica, SBA -15 was functionalized with chloroacetic acid (SBA/CA) via post synthetic grafting technique for useful acidic conversions such as Knoveneganel condensation, Biginelli synthesis and Mannich reaction. The nanocomposites were characterized by Powder X-ray Diffraction method, N2 adsorption-desorption isotherm, 13C CP-MAS NMR, FT-IR, TPD and EDXRF. Very high activity and selectivity was observed for all the conversions under milder reaction conditions. Finally, the mechanism of the reaction is proposed and discussed. Copyright © 2013 VBRI press.