Doctoral Dissertations
Date of Award
8-1992
Degree Type
Dissertation
Degree Name
Doctor of Philosophy
Major
Chemistry
Major Professor
Spiro D. Alexandratos
Abstract
A new type of phosphorus-based Class II dual mechanism bifunctional polymers (DMBPs) has been developed as selective metal ion complexing agents. The newly developed resins include an exchange ligand to enhance the accessibility and a coordinative component to enhance the selectivity to metal ions. The resins were prepared via a new method in which a fully functionalized phosphonic acid resin was first halogenated with SOCI2 and then converted to the phosphonate monoester by the subsequent quenching and hydrolysis processes. A series of bifunctional phosphonate resins containing a coordination ligand such as pyridine or tertiary amine groups on the ester linkage have been synthesized. The binding constants of these new resins to Cu+2 and Co+2 ions in pH 5 solutions were determined by Langmuir isotherm plots. The results indicate that the binding ability is increased due to the presence of the coordination ligand pyridine, and the pyridine group forms a more stable complex to Cu+2 than to Co+2.
The synthesis of a polymer supported dye resin was investigated. The dye group was synthesized via a condensation reaction between poly(p-formylstyrene) and o-chlorophenol in the presence of concentrated sulfonic acid as a catalyst. The intermediate polymer containing a triphenylmethane group was obtained and its structure was confirmed via a model compound. Oxidation of the intermediate to final quinoid dye was studied. The recognition of aniline and its substituted derivatives in methanol by this dye resin was examined.
Recommended Citation
Chang, Frank Wei-Kong, "Synthesis of class II dual mechanism bifunctional ion exchange/coordination resins and characterization of their substrate recognition properties. " PhD diss., University of Tennessee, 1992.
https://trace.tennessee.edu/utk_graddiss/10858