Molecular-sieve catalysts for the selective oxidation of linear alkanes by molecular oxygen
Article Abstract:
The molecular sieve known as aluminophosphate number 18, the pores of which are similar to the zeotypic analogue of the aluminosilicate mineral chabazite, has been used in research focusing on the design and performance of two aluminophosphate molecular sieves containing isolated, four-coordinated Co(III) or Mn(III) ions. These ions are substituted into the framework, acting as regioselective catalysts for the oxidation by molecular oxygen of linear alkanes. Overall conversions in the oxidations were found to be similar to those in industrially significant oxidations of cyclohexane.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
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Heterogeneous catalysts obtained by grafting metallocene complexes onto mesoporous silica
Article Abstract:
The grafting of a metallocene complex on the inner walls of mesoporous silica MCM-41 produces a heterogeneous catalyst. The resulting catalyst possesses well-defined metal-containing active sites with high-surface concentration. These sites show high catalytic activity. A catalyst prepared from titanocene and MCM-41 is effective in the epoxidation of cyclohexene and more voluminous cyclic alkenes. The use of titanocene dichloride removes the possibility of the formation of oligomeric titano-oxo species or anatase.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
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De novo design of structure-directing agents for the synthesis of microporous solids
Article Abstract:
ZEolites By Evolutionary De novo DEsign is a method for generating templates for microporus materials. The template molecules are computationally grown in the desired inorganic framework. The method also suggests a new candidate which succeeds as a template for the target material. It is applicable to template-directed hydrothermal synthesis of crystals and to chemistry of host-guest recognition.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
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