Modifications of the small molecule maltol and photoactivity when coordinated to transition metals.
| dc.contributor.advisor | Farmer, Patrick Joseph, 1957- | |
| dc.contributor.author | Bruner, Britain C. | |
| dc.contributor.department | Chemistry and Biochemistry. | en_US |
| dc.contributor.schools | Baylor University. Dept. of Chemistry and Biochemistry. | en_US |
| dc.date.accessioned | 2014-09-05T13:20:39Z | |
| dc.date.accessioned | 2017-04-07T19:35:16Z | |
| dc.date.available | 2014-09-05T13:20:39Z | |
| dc.date.available | 2017-04-07T19:35:16Z | |
| dc.date.copyright | 2014-08 | |
| dc.date.issued | 2014-09-05 | |
| dc.description.abstract | The family of hetero-substituted maltol chelators, thiomaltol (Htma), dithiomaltol (Httma), and 3-hydroxypyridine-4-thione (Hopto) have been used to generate complexes with Ru(II), Pt(II), Ti(IV), and P(III) that exhibit unique photochemical and photophysical properties. Photo-excitation into ligand-based absorption bands of complexes [Ru(bpy)₂(ttma)] ⁺ and Zn(ttma)₂ engendered electron transfer reactions. Both complexes exhibit long-lived triplet emissions in the near IR spectral region. Photochemical experiments with [Ru(bpy)₂(ttma)] ⁺ formed alcohol and aldehyde products upon photolysis in presence of mild oxidants that do not oxidize in the dark, such as methyl viologen, [Ru(NH₃) ₆] ³⁺ and [Co(NH₃)₅Cl]²⁺. A family of new Pt(II) bipyridyl complexes are reported using the maltol-derived ligands as electron-donors. The [Pt(bpy)L]⁺ complexes display intense and long-lived luminescences due to Ligand-to-Ligand Charge Transfer (LLCT) states; these luminescences are quenched by electron acceptors such as methylviologen and O₂. These compounds are also efficient at singlet oxygen (¹O₂) generation and quenching. Likewise, a family of Ti(IV) complexes with maltol-derived chelators has been synthesized to model the use in dye-sensitized solar cell applications. Lastly, several novel six-coordinate phosphorous complexes with the chelators of the formula P(L)₂X₂were synthesized, which also exhibit room temperature emissions. These several families of photo-active complexes represent a useful palette of dyes for photochemical applications. | en_US |
| dc.description.degree | Ph.D. | en_US |
| dc.identifier.uri | http://hdl.handle.net/2104/9144 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | en | |
| dc.rights | Baylor University theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. Contact librarywebmaster@baylor.edu for inquiries about permission. | en_US |
| dc.rights.accessrights | Worldwide access. | en_US |
| dc.rights.accessrights | Access changed 1/27/17. | |
| dc.subject | Inorganic chemistry. | en_US |
| dc.subject | Synthesis. | en_US |
| dc.subject | Photochemistry. | en_US |
| dc.subject | Dye-sensitized solar cells. | en_US |
| dc.subject | Redox. | en_US |
| dc.subject | Maltol. | en_US |
| dc.subject | Thiomaltol. | en_US |
| dc.subject | Dithiomaltol. | en_US |
| dc.title | Modifications of the small molecule maltol and photoactivity when coordinated to transition metals. | en_US |
| dc.type | Thesis | en_US |