Cobalt/N-Hydroxyphthalimide(NHPI)-Catalyzed Aerobic Oxidation of Hydrocarbons with Ionic Liquid Additive

Sajid Mahmood; Bao Hua Xu; Tian Lu Ren; Zhi-Bo Zhang; Xiao-Min Liu; Suo-Jiang Zhang

doi:10.1016/j.mcat.2018.01.006

Cobalt/N-Hydroxyphthalimide(NHPI)-Catalyzed Aerobic Oxidation of Hydrocarbons with Ionic Liquid Additive

Sajid Mahmood, Bao Hua Xu^*, Tian Lu Ren, Zhi-Bo Zhang, Xiao-Min Liu, Suo-Jiang Zhang

^*Corresponding author for this work

Department of Chemical and Biochemical Engineering

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

Abstract

A highly efficient and solvent-free system of cobalt/NHPI-catalyzed aerobic oxidation of hydrocarbons was developed using imidazolium-based ionic liquid (IL) as an additive. These amphipathic ILs were found self-assemble at the interface between the organic hydrocarbons and the aqueous phase of catalyst combination (Co/NHPI), with forming a solution of reversed multilamellar vesicles for catalysis. The initial reaction rate was influenced by both the composition of microdomains and the structure of IL launched. Consequently, a proper water content (Χ_H2O) of wet IL was requisite to reach the optimum reactivity. Besides, the interfacial boundary between aqueous and organic phase composed by C2-alkylated imidazolium ILs, such as [bdmim]SbF₆ and [C₁₂dmim]SbF₆, not only has ternary aggregates (hydrocarbons/IL/H₂O) of higher stability but renders O₂ a faster diffusion rate and higher concentration, thereby offering a high reactivity of the protocol towards hydrocarbon oxidation.

Original language	English
Journal	Journal of Molecular Catalysis
Volume	447
Pages (from-to)	90-96
ISSN	0304-5102
DOIs	https://doi.org/10.1016/j.mcat.2018.01.006
Publication status	Published - 2018

Keywords

Aerobic oxidation
Hydrocarbons
Ionic liquid
NHPI catalysis
Self-assemble

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@article{f1a9e793d3d943b08509ba4b69a6fbbc,

title = "Cobalt/N-Hydroxyphthalimide(NHPI)-Catalyzed Aerobic Oxidation of Hydrocarbons with Ionic Liquid Additive",

abstract = "A highly efficient and solvent-free system of cobalt/NHPI-catalyzed aerobic oxidation of hydrocarbons was developed using imidazolium-based ionic liquid (IL) as an additive. These amphipathic ILs were found self-assemble at the interface between the organic hydrocarbons and the aqueous phase of catalyst combination (Co/NHPI), with forming a solution of reversed multilamellar vesicles for catalysis. The initial reaction rate was influenced by both the composition of microdomains and the structure of IL launched. Consequently, a proper water content (ΧH2O) of wet IL was requisite to reach the optimum reactivity. Besides, the interfacial boundary between aqueous and organic phase composed by C2-alkylated imidazolium ILs, such as [bdmim]SbF6 and [C12dmim]SbF6, not only has ternary aggregates (hydrocarbons/IL/H2O) of higher stability but renders O2 a faster diffusion rate and higher concentration, thereby offering a high reactivity of the protocol towards hydrocarbon oxidation.",

keywords = "Aerobic oxidation, Hydrocarbons, Ionic liquid, NHPI catalysis, Self-assemble",

author = "Sajid Mahmood and Xu, {Bao Hua} and Ren, {Tian Lu} and Zhi-Bo Zhang and Xiao-Min Liu and Suo-Jiang Zhang",

year = "2018",

doi = "10.1016/j.mcat.2018.01.006",

language = "English",

volume = "447",

pages = "90--96",

journal = "Journal of Molecular Catalysis",

issn = "0304-5102",

publisher = "Elsevier",

}

TY - JOUR

T1 - Cobalt/N-Hydroxyphthalimide(NHPI)-Catalyzed Aerobic Oxidation of Hydrocarbons with Ionic Liquid Additive

AU - Mahmood, Sajid

AU - Xu, Bao Hua

AU - Ren, Tian Lu

AU - Zhang, Zhi-Bo

AU - Liu, Xiao-Min

AU - Zhang, Suo-Jiang

PY - 2018

Y1 - 2018

N2 - A highly efficient and solvent-free system of cobalt/NHPI-catalyzed aerobic oxidation of hydrocarbons was developed using imidazolium-based ionic liquid (IL) as an additive. These amphipathic ILs were found self-assemble at the interface between the organic hydrocarbons and the aqueous phase of catalyst combination (Co/NHPI), with forming a solution of reversed multilamellar vesicles for catalysis. The initial reaction rate was influenced by both the composition of microdomains and the structure of IL launched. Consequently, a proper water content (ΧH2O) of wet IL was requisite to reach the optimum reactivity. Besides, the interfacial boundary between aqueous and organic phase composed by C2-alkylated imidazolium ILs, such as [bdmim]SbF6 and [C12dmim]SbF6, not only has ternary aggregates (hydrocarbons/IL/H2O) of higher stability but renders O2 a faster diffusion rate and higher concentration, thereby offering a high reactivity of the protocol towards hydrocarbon oxidation.

AB - A highly efficient and solvent-free system of cobalt/NHPI-catalyzed aerobic oxidation of hydrocarbons was developed using imidazolium-based ionic liquid (IL) as an additive. These amphipathic ILs were found self-assemble at the interface between the organic hydrocarbons and the aqueous phase of catalyst combination (Co/NHPI), with forming a solution of reversed multilamellar vesicles for catalysis. The initial reaction rate was influenced by both the composition of microdomains and the structure of IL launched. Consequently, a proper water content (ΧH2O) of wet IL was requisite to reach the optimum reactivity. Besides, the interfacial boundary between aqueous and organic phase composed by C2-alkylated imidazolium ILs, such as [bdmim]SbF6 and [C12dmim]SbF6, not only has ternary aggregates (hydrocarbons/IL/H2O) of higher stability but renders O2 a faster diffusion rate and higher concentration, thereby offering a high reactivity of the protocol towards hydrocarbon oxidation.

KW - Aerobic oxidation

KW - Hydrocarbons

KW - Ionic liquid

KW - NHPI catalysis

KW - Self-assemble

U2 - 10.1016/j.mcat.2018.01.006

DO - 10.1016/j.mcat.2018.01.006

M3 - Journal article

VL - 447

SP - 90

EP - 96

JO - Journal of Molecular Catalysis

JF - Journal of Molecular Catalysis

SN - 0304-5102

ER -