Identifier

etd-11082009-203548

Degree

Doctor of Philosophy (PhD)

Department

Chemistry

Document Type

Dissertation

Abstract

Ionic liquids (ILs) are organic salts that melt at or below 100°C. Interest in ILs continues to grow due to their unique properties such as lack of measurable vapor pressure, high thermal stability, tunability and recyclability. The first part of this dissertation explores the use of chiral ionic liquids (CILs) for enantiomeric recognition of chiral analytes using fluorescence spectroscopy. Chiral analyses continue to be a subject of considerable interest primarily as a result of legislation introduced by the Food and Drug Administration. This has led to an increased need for suitable chiral selectors and methods to verify the enantiomeric forms of drugs. In this study, CILs derived from amino acid esters were used simultaneously as solvents and chiral selectors for enantiomeric recognition of various fluorescent as well as non-fluorescent chiral analytes. The second part of this dissertation focuses on the development of a new class of fluorescent near infrared (NIR) nanoparticles from a Group of Uniform Materials Based on Organic Salts (GUMBOS) largely comprising frozen ILs. The GUMBOS were subsequently used to fabricate nanoGUMBOS using a reprecipitation method. The potential of the NIR nanoGUMBOS for non-invasive imaging was evaluated by fluorescence imaging of Vero cells incubated with nanoGUMBOS. Fluorescence imaging of diseased cells and tissues is useful for early detection and treatment of diseases. The work presented here is significant and may improve the quality of human life by employing NIR nanoGUMBOS as contrast agents for early diagnosis and treatment of some diseases. Through variations in the anion, different spectral properties were observed for nanoGUMBOS presenting the possibility of using a single dye for multiple applications.

Date

2009

Document Availability at the Time of Submission

Secure the entire work for patent and/or proprietary purposes for a period of one year. Student has submitted appropriate documentation which states: During this period the copyright owner also agrees not to exercise her/his ownership rights, including public use in works, without prior authorization from LSU. At the end of the one year period, either we or LSU may request an automatic extension for one additional year. At the end of the one year secure period (or its extension, if such is requested), the work will be released for access worldwide.

Committee Chair

Warner, Isiah

Included in

Chemistry Commons

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