Intermolecular Charge Separation in Aggregated Rhodamine Dyes Used in Solar Hydrogen Production
| Autor: | Michael F. Mark, Mark W. Kryman, David W. McCamant, Michael R. Detty |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
business.industry Nanoparticle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Solar fuel Solar energy Photochemistry 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Photoexcitation Rhodamine chemistry.chemical_compound Electron transfer General Energy chemistry Photovoltaics Thiophene Physical and Theoretical Chemistry 0210 nano-technology business |
| Zdroj: | The Journal of Physical Chemistry C. 122:16519-16531 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.8b03045 |
| Popis: | Various modern solar light-harvesting systems, including those used in photovoltaics and solar fuel production, depend on efficient electron transfer from a surface-bound molecular dye to nanoscopic semiconductor particles. However, the productive electron transfer competes with a variety of other relaxation pathways for the dye, and the dominant pathway can change dramatically depending on its environment. A new sulfur-substituted thiorhodamine dye was synthesized having exceptional light-harvesting qualities for solar energy applications and for solar hydrogen production in particular. The dye was created with a thiophene spacer bearing a phosphonate-ester (1-Ester) or phosphonic-acid (1-Acid) allowing for excellent solubility in MeCN or the ability to functionalize metal oxide semiconductor nanoparticles such as TiO2. While 1-Ester is found to be fully monomeric in MeCN, 1-Acid readily forms H-aggregated dimers which, upon photoexcitation, undergo charge separation to an ion pair (IP) in 1.5 ps. For 1-... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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