Liquid-phase oxidation of a pyrimidine thioether on Ti-SBA-15 and UL-TS-1 catalysts in ionic liquids

V. Cimpeanu; A. N. Pârvulescu; V. I. Pârvulescu; D. T. On; S. Kaliaguine; J. M. Thompson; C. Hardacre

doi:10.1016/j.jcat.2005.02.015

Liquid-phase oxidation of a pyrimidine thioether on Ti-SBA-15 and UL-TS-1 catalysts in ionic liquids

V. Cimpeanu, A. N. Pârvulescu, V. I. Pârvulescu, D. T. On, S. Kaliaguine, J. M. Thompson, C. Hardacre^*

^*Corresponding author for this work

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

Abstract

Ti-SBA-15 and UL-TS-1 catalysts with 1.0 and 1.5 at% Ti were tested for the liquid-phase sulfoxidation of 4,6-dimethyl-2-thiomethylpyrimidine in a range of water-miscible and immiscible ionic liquids and molecular solvents. Superior rates and selectivities with respect to the sulfoxide were found in the ionic liquids compared with the molecular solvents. The activity of the catalyst was strongly dependent on the anion-cation combination chosen; the best solvent under these conditions was [emim][BF₄]. Almost no leaching of titanium was found with Ti-SBA-15 in the ionic liquids, whereas significant leaching was observed in molecular solvents. In all solvents used, a surface rearrangement of titanium was observed after reaction, which may account for some loss in activity of the catalyst on recycle.

Original language	English
Pages (from-to)	60-67
Number of pages	8
Journal	Journal of Catalysis
Volume	232
Issue number	1
DOIs	https://doi.org/10.1016/j.jcat.2005.02.015
Publication status	Published - 15 May 2005

Keywords

4,6-Dimethyl-2-thiomethylpyrimidine
Heterogeneous
Ionic liquid
Sulfoxidation
Ti-SBA-15
UL-TS-1

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10.1016/j.jcat.2005.02.015

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title = "Liquid-phase oxidation of a pyrimidine thioether on Ti-SBA-15 and UL-TS-1 catalysts in ionic liquids",

abstract = "Ti-SBA-15 and UL-TS-1 catalysts with 1.0 and 1.5 at% Ti were tested for the liquid-phase sulfoxidation of 4,6-dimethyl-2-thiomethylpyrimidine in a range of water-miscible and immiscible ionic liquids and molecular solvents. Superior rates and selectivities with respect to the sulfoxide were found in the ionic liquids compared with the molecular solvents. The activity of the catalyst was strongly dependent on the anion-cation combination chosen; the best solvent under these conditions was [emim][BF4]. Almost no leaching of titanium was found with Ti-SBA-15 in the ionic liquids, whereas significant leaching was observed in molecular solvents. In all solvents used, a surface rearrangement of titanium was observed after reaction, which may account for some loss in activity of the catalyst on recycle.",

keywords = "4,6-Dimethyl-2-thiomethylpyrimidine, Heterogeneous, Ionic liquid, Sulfoxidation, Ti-SBA-15, UL-TS-1",

author = "V. Cimpeanu and P{\^a}rvulescu, {A. N.} and P{\^a}rvulescu, {V. I.} and On, {D. T.} and S. Kaliaguine and Thompson, {J. M.} and C. Hardacre",

year = "2005",

month = may,

day = "15",

doi = "10.1016/j.jcat.2005.02.015",

language = "English",

volume = "232",

pages = "60--67",

journal = "Journal of Catalysis ",

issn = "0021-9517",

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T1 - Liquid-phase oxidation of a pyrimidine thioether on Ti-SBA-15 and UL-TS-1 catalysts in ionic liquids

AU - Cimpeanu, V.

AU - Pârvulescu, A. N.

AU - Pârvulescu, V. I.

AU - On, D. T.

AU - Kaliaguine, S.

AU - Thompson, J. M.

AU - Hardacre, C.

PY - 2005/5/15

Y1 - 2005/5/15

N2 - Ti-SBA-15 and UL-TS-1 catalysts with 1.0 and 1.5 at% Ti were tested for the liquid-phase sulfoxidation of 4,6-dimethyl-2-thiomethylpyrimidine in a range of water-miscible and immiscible ionic liquids and molecular solvents. Superior rates and selectivities with respect to the sulfoxide were found in the ionic liquids compared with the molecular solvents. The activity of the catalyst was strongly dependent on the anion-cation combination chosen; the best solvent under these conditions was [emim][BF4]. Almost no leaching of titanium was found with Ti-SBA-15 in the ionic liquids, whereas significant leaching was observed in molecular solvents. In all solvents used, a surface rearrangement of titanium was observed after reaction, which may account for some loss in activity of the catalyst on recycle.

AB - Ti-SBA-15 and UL-TS-1 catalysts with 1.0 and 1.5 at% Ti were tested for the liquid-phase sulfoxidation of 4,6-dimethyl-2-thiomethylpyrimidine in a range of water-miscible and immiscible ionic liquids and molecular solvents. Superior rates and selectivities with respect to the sulfoxide were found in the ionic liquids compared with the molecular solvents. The activity of the catalyst was strongly dependent on the anion-cation combination chosen; the best solvent under these conditions was [emim][BF4]. Almost no leaching of titanium was found with Ti-SBA-15 in the ionic liquids, whereas significant leaching was observed in molecular solvents. In all solvents used, a surface rearrangement of titanium was observed after reaction, which may account for some loss in activity of the catalyst on recycle.

KW - 4,6-Dimethyl-2-thiomethylpyrimidine

KW - Heterogeneous

KW - Ionic liquid

KW - Sulfoxidation

KW - Ti-SBA-15

KW - UL-TS-1

UR - http://www.scopus.com/inward/record.url?scp=17644397344&partnerID=8YFLogxK

U2 - 10.1016/j.jcat.2005.02.015

DO - 10.1016/j.jcat.2005.02.015

M3 - Article

AN - SCOPUS:17644397344

SN - 0021-9517

VL - 232

SP - 60

EP - 67

JO - Journal of Catalysis

JF - Journal of Catalysis

IS - 1

ER -

Liquid-phase oxidation of a pyrimidine thioether on Ti-SBA-15 and UL-TS-1 catalysts in ionic liquids

Abstract

Keywords

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