Study of cloverite molecular sieves modified by grafting organometallic complexes inside the pores: II. Adsorption properties of cloverite modified by grafting -SnR3 fragments (R=Me, Et, nBu, Cy)

M. Adachi, J. Corker, H. Kessler, A. De Mallmann, F. Lefebvre*, J. M. Basset

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

The adsorption properties of as-synthesized cloverite and of cloverite modified by grafting -SnR3 (R=Me, Et, nBu, Cy) organometallic tin complexes were studied by a volumetric method. Three hydrocarbons, n-hexane, benzene and iso-octane, were investigated. The adsorption capacities of unmodified cloverite correspond to a filling of the 20 T channel system for benzene and iso-octane, and to a filling of the 8 T and 20 T channel systems for n-hexane. Grafting -SnCy3 fragments onto the external surface of cloverite has no effect on the adsorption capacities of the three hydrocarbons but decreases significantly the diffusion rate of iso-octane. In contrast, the adsorption capacities of cloverite modified by -SnR3 fragments grafted inside the crystal (R=Et, nBu: one fragment per window of the supercage; R=Me: 4 fragments per window) are completely modified: (i) iso-octane is completely excluded from the pore channels, due to steric constraints; (ii) n-hexane can only fill the 20 T pore channel system, and (iii) the decrease of the pore volume by grafting the organometallic fragment results in a reduction of the adsorption capacities of n-hexane and benzene.

Original languageEnglish (US)
Pages (from-to)155-162
Number of pages8
JournalMicroporous and Mesoporous Materials
Volume28
Issue number1
DOIs
StatePublished - Mar 1999

Keywords

  • Adsorption
  • Alkyltin
  • Cloverite
  • Molecular sieves

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials

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