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Stimuli-responsive protection of optically excited triplet ensembles against deactivation by molecular oxygen

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Abstract

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.

Graphical abstract: Stimuli-responsive protection of optically excited triplet ensembles against deactivation by molecular oxygen

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Publication details

The article was received on 02 Oct 2017, accepted on 17 Jan 2018 and first published on 23 Jan 2018


Article type: Paper
DOI: 10.1039/C7DT03698A
Citation: Dalton Trans., 2018, Advance Article
  • Open access: Creative Commons BY license
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    Stimuli-responsive protection of optically excited triplet ensembles against deactivation by molecular oxygen

    N. V. Nazarova, Yu. S. Avlasevich, K. Landfester and S. Baluschev, Dalton Trans., 2018, Advance Article , DOI: 10.1039/C7DT03698A

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