Oxidation catalysis with well-characterised vanadyl bis-bipyridine complexes encapsulated in NaY zeolite

P. P. Knops-Gerrits; C. A. Trujillo; B. Z. Zhan; X. Y. Li; P. Rouxhet; P. A. Jacobs

Oxidation catalysis with well-characterised vanadyl bis-bipyridine complexes encapsulated in NaY zeolite

P. P. Knops-Gerrits^*, C. A. Trujillo, B. Z. Zhan, X. Y. Li, P. Rouxhet, P. A. Jacobs

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Journal Article › peer-review

30 Citations (Scopus)

Abstract

Vanadyl exchanged faujasite (VO²⁺-NaY) allows bipyridine complexation, giving a heterogeneous "ship-in-a-bottle" catalyst denoted as [VO(bpy)₂]²⁺-NaY. The [YO(bpy)₂]²⁺ complexes associated with the zeolite are characterised with FT-Raman, FT-IR, XPS, and diffuse reflectance spectroscopy (DRS), as well as with electron paramagnetic resonance (EPR). It is established that the cationic complexes are intrazeolitic and homogeneously distributed across the zeolite crystals and both the zeolite and the neutral bipyridine ligands stabilise V^IV The catalytic oxidation of cyclohexane and cyclohexene with different peroxides or mono-oxygen atom donors in presence of several solvents is described. Good epoxide selectivity results from the complexation by bipyridine thus favoring the heterolytic over the homolytic decomposition pathway of V-peroxo-intermediates.

Original language	English
Pages (from-to)	437-449
Number of pages	13
Journal	Topics in Catalysis
Volume	3
Issue number	3-4
Publication status	Published - 1996

Keywords

EPR-DRS
IR-Raman
Oxidation catalysis
XPS-CA
Zeolite; vanadium complex

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https://hdl.handle.net/1783.1/47647

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@article{6d032b484276418886807690f308c633,

title = "Oxidation catalysis with well-characterised vanadyl bis-bipyridine complexes encapsulated in NaY zeolite",

abstract = "Vanadyl exchanged faujasite (VO2+-NaY) allows bipyridine complexation, giving a heterogeneous {"}ship-in-a-bottle{"} catalyst denoted as [VO(bpy)2]2+-NaY. The [YO(bpy)2]2+ complexes associated with the zeolite are characterised with FT-Raman, FT-IR, XPS, and diffuse reflectance spectroscopy (DRS), as well as with electron paramagnetic resonance (EPR). It is established that the cationic complexes are intrazeolitic and homogeneously distributed across the zeolite crystals and both the zeolite and the neutral bipyridine ligands stabilise VIV The catalytic oxidation of cyclohexane and cyclohexene with different peroxides or mono-oxygen atom donors in presence of several solvents is described. Good epoxide selectivity results from the complexation by bipyridine thus favoring the heterolytic over the homolytic decomposition pathway of V-peroxo-intermediates.",

keywords = "EPR-DRS, IR-Raman, Oxidation catalysis, XPS-CA, Zeolite; vanadium complex",

author = "Knops-Gerrits, \{P. P.\} and Trujillo, \{C. A.\} and Zhan, \{B. Z.\} and Li, \{X. Y.\} and P. Rouxhet and Jacobs, \{P. A.\}",

year = "1996",

language = "English",

volume = "3",

pages = "437--449",

journal = "Topics in Catalysis",

issn = "1022-5528",

publisher = "Springer",

number = "3-4",

}

TY - JOUR

T1 - Oxidation catalysis with well-characterised vanadyl bis-bipyridine complexes encapsulated in NaY zeolite

AU - Knops-Gerrits, P. P.

AU - Trujillo, C. A.

AU - Zhan, B. Z.

AU - Li, X. Y.

AU - Rouxhet, P.

AU - Jacobs, P. A.

PY - 1996

Y1 - 1996

N2 - Vanadyl exchanged faujasite (VO2+-NaY) allows bipyridine complexation, giving a heterogeneous "ship-in-a-bottle" catalyst denoted as [VO(bpy)2]2+-NaY. The [YO(bpy)2]2+ complexes associated with the zeolite are characterised with FT-Raman, FT-IR, XPS, and diffuse reflectance spectroscopy (DRS), as well as with electron paramagnetic resonance (EPR). It is established that the cationic complexes are intrazeolitic and homogeneously distributed across the zeolite crystals and both the zeolite and the neutral bipyridine ligands stabilise VIV The catalytic oxidation of cyclohexane and cyclohexene with different peroxides or mono-oxygen atom donors in presence of several solvents is described. Good epoxide selectivity results from the complexation by bipyridine thus favoring the heterolytic over the homolytic decomposition pathway of V-peroxo-intermediates.

AB - Vanadyl exchanged faujasite (VO2+-NaY) allows bipyridine complexation, giving a heterogeneous "ship-in-a-bottle" catalyst denoted as [VO(bpy)2]2+-NaY. The [YO(bpy)2]2+ complexes associated with the zeolite are characterised with FT-Raman, FT-IR, XPS, and diffuse reflectance spectroscopy (DRS), as well as with electron paramagnetic resonance (EPR). It is established that the cationic complexes are intrazeolitic and homogeneously distributed across the zeolite crystals and both the zeolite and the neutral bipyridine ligands stabilise VIV The catalytic oxidation of cyclohexane and cyclohexene with different peroxides or mono-oxygen atom donors in presence of several solvents is described. Good epoxide selectivity results from the complexation by bipyridine thus favoring the heterolytic over the homolytic decomposition pathway of V-peroxo-intermediates.

KW - EPR-DRS

KW - IR-Raman

KW - Oxidation catalysis

KW - XPS-CA

KW - Zeolite; vanadium complex

UR - https://www.webofscience.com/wos/woscc/full-record/WOS:A1996VG06600015

UR - https://www.scopus.com/pages/publications/0001476561

M3 - Journal Article

SN - 1022-5528

VL - 3

SP - 437

EP - 449

JO - Topics in Catalysis

JF - Topics in Catalysis

IS - 3-4

ER -

Oxidation catalysis with well-characterised vanadyl bis-bipyridine complexes encapsulated in NaY zeolite

Abstract

Keywords

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