PERIODIC MESOPOROUS ORGANOSILICA (PMO) NANOPARTICLES: DESIGN, PREPARATION AND APPLICATIONS IN ORGANIC TRANSFORMATIONS

Suheir Omar Raed Abu-Reziq
Institute of Chemistry, Casali Center of Applied Chemistry, Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem

The discovery of ordered mesoporous organosilicas (PMOs) in early nineties1-3 opened up remarkably broad opportunities in the synthesis of ordered mesoporous organic-inorganic composites. Generally, PMOs are synthesized by hydrolysis and condensation reactions of bridged organosilica precursors via the self-assembly process of a structure-directing agent which assists to create uniform pores in the size of 2-30 nm and high surface area that reaches up to 1800 m2/g. Additionally, adjusting the bridged organic groups of PMOs can not only vary the hydrophobicity/hydrophilicity of the pore surface, but also tailor their chemical and physical properties, which can lead to potentially new applications in catalysis, chromatography, drug delivery, insulating materials and fuel cells.4 In our research, we develop structurally well-defined hybrid PMO nanoparticles as metal nanoparticles supports. The synthesis of these PMOs is mediated by sol-gel process under mild conditions, based on the hydrolysis and condensation of bridged organo-alkoxysilane precursor compounds, (OR)3Si-R-Si(OR)3, with a proper surfactant. The presence of organic groups in the framework of our PMO NPs renders a real advantage for an increased stabilization, dispersion and activation of the supported metal nanoparticles. These PMO NPs are utilized for supporting ruthenium nanoparticles and will be examined in the transfer hydrogenation reactions of alkynes. The convenient preparation of the catalytic PMO NPs and their characterizations will be presented.

  1. Inagaki, ; Guan, S.; Fukushima, Y.; Ohsuna, T.; Terasaki, O. Am. Chem. Soc., 1999, 121, 9611.
  2. Melde,J.; Holland, B.T.; Blanford, C. F.; Stein, A. Mater., 1999, 11, 3302.
  3. Asefa, ; MacLachlan, M. J.; Coombs, N.; Ozin, G. A.Nature, 1999, 402, 867.
  4. Park, S.; Moorthy, M.; Ha, C.-S., Korean J. Chem. Eng. 2014, 31, 1707-1719.









Powered by Eventact EMS