Please use this identifier to cite or link to this item:
https://doi.org/10.1039/c2dt31096a
Title: | Selective synthesis of vitamin K3 over mesoporous NbSBA-15 catalysts synthesized by an efficient hydrothermal method | Authors: | Selvaraj, M. Park, D.-W. Kim, I. Kawi, S. Ha, C.S. |
Issue Date: | 28-Aug-2012 | Citation: | Selvaraj, M., Park, D.-W., Kim, I., Kawi, S., Ha, C.S. (2012-08-28). Selective synthesis of vitamin K3 over mesoporous NbSBA-15 catalysts synthesized by an efficient hydrothermal method. Dalton Transactions 41 (32) : 9633-9638. ScholarBank@NUS Repository. https://doi.org/10.1039/c2dt31096a | Abstract: | Well hexagonally ordered NbSBA-15 catalysts synthesized by an efficient hydrothermal method were used, for the first time, for the selective synthesis of vitamin K3 by liquid-phase oxidation of 2-methyl-1-naphthol (2MN1-OH) under various reaction conditions. The recyclable NbSBA-15 catalysts were also reused to find their catalytic activities. To investigate the leaching of non-framework niobium species on the surface of silica networks, the results of original and recyclable NbSBA-15 catalysts were correlated and compared. To find an optimum condition for the selective synthesis of vitamin K3, the washed NbSBA-15(2.2pH) was extensively used in this reaction with various reaction parameters such as temperature, time and ratios of reactant (2M1N-OH to H2O2), and the obtained results were also demonstrated. Additionally, the liquid-phase oxidation of 2M1N-OH was carried out with different solvents to find the best solvent with a good catalytic activity. Based on the all catalytic studies, the vitamin K3 selectivity (97.3%) is higher in NbSBA-15(2.2pH) than that of other NbSBA-15 catalysts, and the NbSBA-15(2.2pH) is found to be a highly active and eco-friendly heterogeneous catalyst for the selective synthesis of vitamin K3. © 2012 The Royal Society of Chemistry. | Source Title: | Dalton Transactions | URI: | http://scholarbank.nus.edu.sg/handle/10635/90101 | ISSN: | 14779226 | DOI: | 10.1039/c2dt31096a |
Appears in Collections: | Staff Publications |
Show full item record
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.