Premium
Mesoporous Silicas Modified with Dioxomolybdenum(VI) Complexes: Synthesis and Catalysis
Author(s) -
Ferreira Paula,
Gonçalves Isabel S.,
Kühn Fritz E.,
Lopes André D.,
Martins Manuel A.,
Pillinger Martyn,
Pina Anabela,
Rocha João,
Romão Carlos C.,
Santos Ana M.,
Santos Teresa M.,
Valente Anabela A.
Publication year - 2000
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/1099-0682(200010)2000:10<2263::aid-ejic2263>3.0.co;2-u
Subject(s) - chemistry , cyclooctene , mesoporous material , molecular sieve , catalysis , magic angle spinning , nuclear magnetic resonance spectroscopy , mcm 41 , heterogeneous catalysis , elemental analysis , infrared spectroscopy , polymer chemistry , inorganic chemistry , organic chemistry
The dioxomolybdenum(VI) fragment MoO 2 X 2 has been confined within the ordered mesopores of pure siliceous hexagonal MCM‐41 and cubic MCM‐48 molecular sieves either by direct grafting (solvent impregnation) with MoO 2 X 2 (THF) 2 or by using a spacer ligand [L = NC(CH 2 ) 2 Si(OEt) 3 ]. The materials have been characterised by elemental analysis, powder X‐ray diffraction, N 2 adsorption, IR spectroscopy, and magic‐angle spinning NMR spectroscopy ( 13 C, 29 Si). All catalysts, homogeneous and heterogenised, are active in the epoxidation of cyclooctene with tert ‐butyl hydroperoxide.