Electrochemisty, Spectroelectrochemistry And/Or Electrosynthesis of Pi-Extended Porphyrins in Nonaqueous Media

This dissertation presents the electrochemistry, spectroelectrochemistry and electrosynthesis of pi-extended porphyrins. The electrochemistry and UV-vis spectral properties of neutral and protonated Au(III) quinoxalinoporphyrins containing one to four beta, beta'-fused quinoxalines were characterized in nonaqueous solvents. Mutiple Au(III)/Au(II) centered reductions were observed in acidic media, with the exact number depending on the number of fused quinoxaline groups on the compounds. Electrochemical and thin-layer spectroelectrochemical properties of mono- and bis-beta, beta'-porphyrins containing a beta, beta'-fused tetraazaanthracene (TA) group were also examined in different solvents. Each TA linked bis-porphyrin exhibits a strong interaction between the two equivalent porphyrin macrocycles, the magnitude of which is dependent upon the specific central metal ion. Finally, meso-naphthalene substituted and meso,beta-naphthalene extended porphyrins with five different central ions were characterized as to the their electrochemistry and UV-vis spectroelectrochemistry in CH2Cl2 and PhCN containing 0.1 M TBAP. All of the naphthalene substituted porphyrins could be converted to a naphthalene fused porphyrin after a two-electron oxidation, independent of the metal oxidation state, metal coordination number or solvent. The electron abstraction site of the second oxidation was shown to be dependent on the porphyrin central metal ion and the naphthalene oxidation potentials.

Name thesis:degree_name

Doctor of Philosophy

Level thesis:degree_level

Doctoral

Discipline thesis:degree_discipline

Chemistry

Grantor

University of Houston

Year dc:date.issued

2014

Author dc:creator

• Fang, Yuanyuan 1984-

Advisor dc:contributor.advisor

• Kadish, Karl M.

Committee members dc:contributor.committeemember

• Czernuszewicz, Roman S.
• Moeller, Angela
• Thummel, Randolph P.
• Briggs, James M.

• Electrochemistry
• Spectroelectrochemistry
• Extended porphyrin

Statement dc:rights

• The author of this work is the copyright owner. UH Libraries and the Texas Digital Library have their permission to store and provide access to this work. UH Libraries has secured permission to reproduce any and all previously published materials contained in the work. Further transmission, reproduction, or presentation of this work is prohibited except with permission of the author(s).

Language dc:language.iso

eng

Handle dc:identifier.uri

https://hdl.handle.net/10657/5356

OAI identifier oai:identifier

oai:uh-ir.tdl.org:10657/5356