Award Date

12-1-2014

Degree Type

Thesis

Degree Name

Master of Science (MS)

Department

Chemistry and Biochemistry

First Committee Member

Kenneth Czerwinski

Second Committee Member

Frederic Poineau

Third Committee Member

Paul Forster

Fourth Committee Member

David Hatchett

Fifth Committee Member

Thomas Hartmann

Number of Pages

60

Abstract

The reaction of bidentate aniline oligomers with pentavalent technetium has been investigated previously through the reaction of (n-Bu4N)TcOCl4 with o-phenylenediamine (PDA). The initial studies found that PDA reacted in a 1 to 2 molar ratio with pentavalent technetium in in ethanol. This study was expanded by the examination of a second aniline derivatives, 2-aminophenol (AMP)) and two thiobenzene derivatives (2-mercaptophenol (MP) and thiosalicylic acid (TSA)) to evaluate the kinetic formation of these complexes with pentavalent technetium. The pentavalent technetium complexes all showed reactivity with technetium having a coordination numbers of 5 with all ligands reacting in a 1 to 2 metal to ligand ratio, which was confirmed by the use of electrospray ionization mass spectrometry (ESI- MS). Kinetic measurements were performed by UV-visible spectroscopy in a 24 hours period. Separate spectra were also obtained of the metal ligand complex at varying ratios of metal to ligand concentration to determine extinction coefficients for each metal-ligand complex based on Beer-Lambert's equation. While most of the reactions took about 24 hours to reach completion, the complex of TcO(TSA)2- has the fastest formation rate while the TcO(PDA)2- had that fastest reaction rate for the analine derivatives

Keywords

Aniline; Derivatives; Pentavalent; Speciation; Oligomers; Phenylenediamines; Technetium; Thiobenzene

Disciplines

Chemistry | Polymer Chemistry

File Format

pdf

Degree Grantor

University of Nevada, Las Vegas

Language

English

Rights

IN COPYRIGHT. For more information about this rights statement, please visit http://rightsstatements.org/vocab/InC/1.0/

Download


Share

COinS