Catalytic hydroxylation of phenol using immobilized late transition metal salicylaldimine complexes

Saptarshi Ray; Selwyn F. Mapolie; James Darkwa

doi:10.1016/j.molcata.2006.11.031

Catalytic hydroxylation of phenol using immobilized late transition metal salicylaldimine complexes

Saptarshi Ray, Selwyn F. Mapolie, James Darkwa

Chemical Sciences

University of the Western Cape

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

45 Citations (Scopus)

Abstract

Immobilized late transition metal complexes based on salicylaldimine ligands were used as catalysts in the wet air hydroxylation of phenol in the presence of hydrogen peroxide. Three metals, viz. cobalt, nickel and copper, and two different kinds of supports, namely, amorphous silica and mesoporous MCM-41, were employed. The effect of pH on the hydroxylation process was also investigated. It was observed that the regioselectivity of the hydroxylation process strongly depends on the kind of support employed.

Original language	English
Pages (from-to)	143-148
Number of pages	6
Journal	Journal of Molecular Catalysis A: Chemical
Volume	267
Issue number	1-2
DOIs	https://doi.org/10.1016/j.molcata.2006.11.031
Publication status	Published - 18 Apr 2007

Keywords

Hydrogen peroxide
Immobilized catalysts
MCM-41
Phenol hydroxylation
Phenol oxidation
Salicylaldimine complexes

ASJC Scopus subject areas

Catalysis
Process Chemistry and Technology
Physical and Theoretical Chemistry

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10.1016/j.molcata.2006.11.031

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title = "Catalytic hydroxylation of phenol using immobilized late transition metal salicylaldimine complexes",

abstract = "Immobilized late transition metal complexes based on salicylaldimine ligands were used as catalysts in the wet air hydroxylation of phenol in the presence of hydrogen peroxide. Three metals, viz. cobalt, nickel and copper, and two different kinds of supports, namely, amorphous silica and mesoporous MCM-41, were employed. The effect of pH on the hydroxylation process was also investigated. It was observed that the regioselectivity of the hydroxylation process strongly depends on the kind of support employed.",

keywords = "Hydrogen peroxide, Immobilized catalysts, MCM-41, Phenol hydroxylation, Phenol oxidation, Salicylaldimine complexes",

author = "Saptarshi Ray and Mapolie, {Selwyn F.} and James Darkwa",

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T1 - Catalytic hydroxylation of phenol using immobilized late transition metal salicylaldimine complexes

AU - Ray, Saptarshi

AU - Mapolie, Selwyn F.

AU - Darkwa, James

PY - 2007/4/18

Y1 - 2007/4/18

N2 - Immobilized late transition metal complexes based on salicylaldimine ligands were used as catalysts in the wet air hydroxylation of phenol in the presence of hydrogen peroxide. Three metals, viz. cobalt, nickel and copper, and two different kinds of supports, namely, amorphous silica and mesoporous MCM-41, were employed. The effect of pH on the hydroxylation process was also investigated. It was observed that the regioselectivity of the hydroxylation process strongly depends on the kind of support employed.

AB - Immobilized late transition metal complexes based on salicylaldimine ligands were used as catalysts in the wet air hydroxylation of phenol in the presence of hydrogen peroxide. Three metals, viz. cobalt, nickel and copper, and two different kinds of supports, namely, amorphous silica and mesoporous MCM-41, were employed. The effect of pH on the hydroxylation process was also investigated. It was observed that the regioselectivity of the hydroxylation process strongly depends on the kind of support employed.

KW - Hydrogen peroxide

KW - Immobilized catalysts

KW - MCM-41

KW - Phenol hydroxylation

KW - Phenol oxidation

KW - Salicylaldimine complexes

UR - http://www.scopus.com/inward/record.url?scp=33947304316&partnerID=8YFLogxK

U2 - 10.1016/j.molcata.2006.11.031

DO - 10.1016/j.molcata.2006.11.031

M3 - Article

AN - SCOPUS:33947304316

SN - 1381-1169

VL - 267

SP - 143

EP - 148

JO - Journal of Molecular Catalysis A: Chemical

JF - Journal of Molecular Catalysis A: Chemical

IS - 1-2

ER -

Catalytic hydroxylation of phenol using immobilized late transition metal salicylaldimine complexes

Abstract

Keywords

ASJC Scopus subject areas

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