Please use this identifier to cite or link to this item: http://hdl.handle.net/10773/19401
Title: Norbornene Oxidation by Chiral Complexes Encapsulated in NaY Zeolite
Author: Kuzniarska-Biernacka, I.
Parpot, P.
Oliveira, C.
Silva, A. R.
Alves, M. J.
Fonseca, A. M.
Neves, I. C.
Keywords: SCHIFF-BASE COMPLEXES
A-BOTTLE SYNTHESIS
Y-ZEOLITE
CATALYTIC-OXIDATION
MANGANESE COMPLEXES
ALKENE EPOXIDATION
REUSABLE CATALYSTS
ORGANIC-SYNTHESIS
MOLECULAR-OXYGEN
SALEN COMPLEX
Issue Date: 2014
Publisher: AMER CHEMICAL SOC
Abstract: The preparation of chiral metal complexes in NaY zeolite is reported. The guests, chiral metal complexes, were entrapped in the supercages of NaY zeolite (host) by a two-step process in the liquid phase: (i) inclusion of the selected transition metal (rhodium(III) and manganese(II)) by ion-exchange in the porous structure and (ii) introduction of the chiral ligand, an D-erythrose amino derivative, namely (2R,4S,5R)-4-[(N-methylamino)methyl]-2-phenyl-1,3-dioxan-5-ol, followed by assembly of the complex inside the void space of the zeolite. Structural (FTIR and XRD), surface studies (SEM) and chemical analyses were used to characterize the new host guest catalysts and the results indicated that chiral metal complexes were successfully encapsulated in supercages of the NaY zeolite. Catalytic studies were performed in liquid phase for norbornene oxidation using tert-butyl hydroperoxide as the oxygen source. The catalytic results were compared with styrene and cyclohexanol oxidation as model reactions. The prepared chiral catalysts exhibited catalytic activity for all oxidation reactions. The stability of the catalysts before and after reaction was confirmed by cyclic voltammetry and FTIR studies.
Peer review: yes
URI: http://hdl.handle.net/10773/19401
DOI: 10.1021/jp5031812
ISSN: 1932-7447
Publisher Version: 10.1021/jp5031812
Appears in Collections:CICECO - Artigos

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