Doctoral Dissertations

Woon Su Oh

Keywords and Phrases

Imidazolium salts

Abstract

"Imidazolium-based ionic liquids have been increasingly used as green solvents to replace the volatile and relatively toxic organic solvents, in homogeneous and heterogeneous catalysis, materials science, nano materials, lithium ion batteries, and separation technology. Section 1 describes the modulating effect of the imidazolium based room temperature ionic liquids (RTILs) on the critical micelle concentrations (CMC) of surfactants. CMC of sodium dodecyl sulfate (SDS), an anionic surfactant, has been investigated in aqueous solutions of a variety of room temperature ionic liquids (RTILs). CMC values decrease with increasing alkyl chain-length and with fluorinated side chains on the imidazole moiety. In section 2, applications of ionic liquids and their polymer derivatives immobilized with Lewis acid catalysts, as heterogeneous catalysts, for various organic transformations is described. For example, the water-tolerant Lewis acid, gadolinium triflate (Gd(OTf)₃), immobilized in RTILs and their polymeric derivatives are convenient recyclable and green catalysts for acetylation of a variety of alcohols, phenols, amines, and Michael additions of amines and thiols to α, ß-unsaturated esters and acrylonitrile. Section 3 outlines synthesis of polynorbornene based imidazolium ionic liquids. Through Grubbs' catalyst mediated ring opening metathesis polyhmerization (ROMP), we were able to obtain oligomers of the polynorbornene-imidazolium salts, which are potentially useful as gel-polymer electrolytes in lithium ion batteries, and in the preparation of Ag nanowires and carbon nanotubes"--Abstract, page iii.

Advisor(s)

Reddy, Prakash

Committee Member(s)

Ma, Yinfa
Sitton, Oliver C., 1951-
Sinn, Ekkehard
Huang, Yue-wern

Department(s)

Physics

Degree Name

Ph. D. in Physics

Publisher

Missouri University of Science and Technology

Publication Date

Spring 2012

Journal article titles appearing in thesis/dissertation

  • Structural effects of ionic liquids on the critical micelle concentrations (CMC) of surfactants
  • Ionic liquids as recycleable catalysts and green solvents

Pagination

xii, 125 pages

Note about bibliography

Includes bibliographical references (pages 121-124).

Rights

© 2012 Woon Su Oh, All rights reserved.

Document Type

Dissertation - Open Access

File Type

text

Language

English

Subject Headings

Critical micelle concentrationEnvironmental chemistry -- Industrial applicationsHeterogeneous catalysisLewis acids

Thesis Number

T 10006

Print OCLC #

815749278

Electronic OCLC #

793605216

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Physics Commons

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