Journal
NEW JOURNAL OF CHEMISTRY
Volume 46, Issue 19, Pages 9418-9431Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2nj00669c
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- IITRAM
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In this study, a tetranuclear Zn (Zn-4) complex was immobilized on a novel layered Hiroshima University Silicate (HUS)-7. The modified HUS-7 was used as a catalyst for two different catalytic epoxide ring opening reactions, and it was found to be highly active and reusable, supporting the significance of the proposed functionalization.
A tetranuclear Zn (Zn-4) complex was selected for immobilization on novel layered Hiroshima University Silicate (HUS)-7. Modification of HUS-7 was carried out using a sulfopropylsilyl agent followed by Zn-4 complex incorporation. The structural investigation of this organic-inorganic, hybrid layered HUS-7 material was performed using various measurements to confirm the tethering of guest molecules. The modified HUS-7 was used as a catalyst for two different catalytic epoxide ring opening reactions, yielding two different regioisomeric products (beta-amino alcohols). Theoretical energy calculations were performed for the pure Zn-4 complex, substrate, nucleophile, intermediates and products to check the stability of the regioisomer for the morpholine system. The catalyst was found to be highly active for both the reaction systems with reusability up to the fourth cycle supporting the significance of the proposed functionalization. Furthermore, investigation of structural changes of the spent catalyst was also carried out.
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