Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Porous Organic-inorganic Hybrids for Removal of Amines

  • Cho, Sung-Youl (Department of Chemistry, Yonsei University) ;
  • Kim, Na-Ri (Department of Chemistry, Yonsei University) ;
  • Cao, Guozhong (Department of Materials Science and Engineering, University of Washington) ;
  • Kim, Joong-Gon (Biotechnology Division, Hanwha Chemical R&D Center) ;
  • Chung, Chan-Moon (Department of Chemistry, Yonsei University)
  • Published : 2006.03.20
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Abstract

Porous organic-inorganic hybrids have been prepared from tetraethylorthosilicate (TEOS) and organosilane precursors by sol-gel method. Two organosilanes, 3-(2,4-dinitrophenylamino)propyltriethoxysilane (DNPTES) and N-[[(2-nitrophenyl)methoxy]carbonyl]-3-triethoxysilylpropylamine (NPTES) were used to incorporate electron-accepting (di)nitrophenyl groups into the hybrids. The hybrids were characterized by FT-IR spectroscopy and elemental analysis, and their pore characteristics were studied by nitrogen sorption porosimetry. Surface area of the hybrids ranged from 563 to 770 $m^2$/g, pore volume, 0.23-0.30 $cm^3$/g, and porosity, 35-41%. It was demonstrated by UV-vis spectroscopy that aniline, ethylenediamine, and 1-aminonaphthalene could be removed from their hexane solutions in the presence of the hybrid powders. The removal of amines is attributable to donor-acceptor interaction between the electron-donating amines and electron-accepting (di)nitrophenyl moiety.

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