期刊
JOURNAL OF POROUS MATERIALS
卷 23, 期 6, 页码 1507-1518出版社
SPRINGER
DOI: 10.1007/s10934-016-0211-2
关键词
Zeolite-Y; Metal-ligand framework; Heterogeneous catalyst; Cyclohexanone oxidation
资金
- UGC, New Delhi
Zeolite-Y enslaved complexes were prepared by the Flexible ligand method. Synthesized materials were characterized by various spectral tools like powder X-ray diffraction, spectral studies (UV-Vis and FT-IR), chemical analysis (ICP-OES and elemental), scanning electron microscopy, AAS and H-1-NMR techniques. Further, BET and thermogravimetric (TG) analysis were also done for characterization of surface area, pore volume, thermal behavior, and related parameters. Baeyer-Villiger oxidation of cyclohexanone was carried out over Zeolite-Y enslaved complexes using hydrogen peroxide (H2O2) as an oxidant. The performance of the heterogeneous system with the homogeneous system was compared to determine the protection effect of the zeolitic matrix over the active center on the catalytic properties. In addition, the effect of experimental variables (various solvents, amount of catalyst, the mole ratio of substrate and oxidant, temperature, and reaction time) was examined in order to get absolute reaction conditions. Under the optimized reaction conditions, [Fe(nbab)(2)]-Y was found to be a potential candidate, achieving 70 % E >-caprolactone selectivity.
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