Issue 26, 2018

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

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

Supplementary files

Article information

Article type
Paper
Submitted
02 out 2017
Accepted
17 jan 2018
First published
23 jan 2018
This article is Open Access
Creative Commons BY license

Dalton Trans., 2018,47, 8605-8610

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, 47, 8605 DOI: 10.1039/C7DT03698A

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