Stimuli-responsive protection of optically excited triplet ensembles against deactivation by molecular oxygen
| Autor: | Yuri Avlasevich, Stanislav Baluschev, Katharina Landfester, Nadzeya V. Nazarova |
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| Rok vydání: | 2018 |
| Předmět: |
inorganic chemicals
Materials science Stimuli responsive Singlet oxygen 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Photon upconversion 0104 chemical sciences Inorganic Chemistry chemistry.chemical_compound chemistry Excited state Molecular oxygen Triplet state 0210 nano-technology Scavenging |
| Zdroj: | Dalton Transactions |
| ISSN: | 1477-9234 1477-9226 |
| Popis: | Herein we demonstrate temperature-dependent sacrificial singlet oxygen scavenging properties of N-butyl-2-pyridone, ensuring efficient stimuli-responsive protection of densely populated excited triplet state ensembles against deactivation by molecular oxygen. As an acting external stimulus the temperature was chosen: it will be shown that at low temperature the concentration of singlet oxygen will be substantially lowered; in contrast, at elevated temperatures singlet oxygen will not be captured, and thus the optically excited densely populated triplet ensembles will be effectively depopulated. The singlet oxygen scavenging ability of N-butyl-2-pyridone demonstrates long-term protection of a triplet-triplet annihilation upconversion process against photooxidation. |
| Databáze: | OpenAIRE |
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