Spring 2021 Seminars
Zoom Webinar/Seminar at 3:00-3:45 PM Est and Questions 3:45-4:00
| Date | Speaker | Home Institution | Host | Type of Chemistry |
|---|---|---|---|---|
| January 22, 2021 | First Day No Speaker | First Day No Speaker | First Day No Speaker | First Day No Speaker |
| January 29, 2021 | Shiyu Zhang | The Ohio State University | Lee | Inorganic |
| February 5, 2021 | Eirin McBride | University of North Florida | Dungey | Materials Science |
| February 12, 2021 | STEM Pedagogy - No Speaker | STEM Pedagogy - No Speaker | STEM Pedagogy - No Speaker | STEM Pedagogy - No Speaker |
| February 19, 2021 | ||||
| February 26, 2021 | Paul Wagenknecht | Furman University | Pienkos | Inorganic |
| March 5, 2021 | STEM Pedagogy - No Speaker | STEM Pedagogy - No Speaker | STEM Pedagogy - No Speaker | STEM Pedagogy - No Speaker |
| March 12, 2021 | Ayanjeet Ghosh | University of Alabama | Park | Physical/Spectroscopy |
| March 19, 2021 | ||||
| March 26, 2021 | Peggy Kovach | UTC | Rybolt | "Introduction to Virology with Applications to the COVID 19 Pandemic" |
| April 2, 2021 | Good Friday - No Class | Good Friday - No Class | Good Friday - No Class | Good Friday - No Class |
| April 9, 2021 | ||||
| April 16, 2021 | ||||
| April 23, 2021 |
Abstract February 26, 2021
From Sapphire to Solar Cells: Exploring, Manipulating, and Exploiting Iron(II) to Titanium(IV) Metal-to-Metal Charge Transfer
Iron(II)-to-titanium(IV) metal-to-metal-charge transfer (MMCT) is important in the photosensitization of TiO2 by ferrocyanide, charge transfer in solid-state metal-oxide photocatalysts, and has been invoked to explain the blue color of sapphire, blue kyanite, and some lunar material, yet molecular examples of this phenomenon have not been investigated. We have prepared a series of complexes with alkynyl linkages between ferrocene (Fc) and Cp2TiIV and investigated the charge transfer by UV-Visible absorption spectroscopy, electrochemistry, TRTAS, and TD-DFT. All of the complexes with both Fc and Ti show an intense absorption between 540 and 630 nm that is consistent with assignment as an FeII to TiIV MMCT band. The energy of the MMCT can be manipulated through adjusting the ligand donor strength of the Cp ring on the Ti, which in turn impacts the excited state lifetimes. Some discussion will be given to the case of a complex where the Cp ligands on TiIV are replaced by indenyl ligands. Curiously, compared to its Cp analogue, the TiIV/III potential shifts anodically, whereas the FeIII/II potential shifts cathodically. Lastly, strategies and progress toward the use these complexes in dye-sensitzed solar cells will be shared.