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Issue 27, 2018
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Impact of kilobar pressures on ultrafast triazene and thiacyanine photodynamics

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Abstract

Very short fluorescence lifetimes evidence ultrafast deactivation of photoexcited molecules. To unveil the underlying mechanism for two compounds exhibiting (sub)picosecond emission dynamics, we combine femtosecond fluorescence upconversion with high-pressure liquid-phase spectroscopy. For the triazene berenil, the absence of a pressure dependence corroborates a bicycle-pedal motion as deactivating process. In the thiacyanine NK88 which may undergo a bi-phasic deactivation, our results suggest that kilobar pressures lead to a modification of the excited-state potential energy surface, thereby changing the branching ratio of two competing pathways and opening a possibility to steer the product distribution of the photoreaction.

Graphical abstract: Impact of kilobar pressures on ultrafast triazene and thiacyanine photodynamics

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Publication details

The article was received on 25 May 2018, accepted on 20 Jun 2018 and first published on 27 Jun 2018


Article type: Communication
DOI: 10.1039/C8CP03334J
Citation: Phys. Chem. Chem. Phys., 2018,20, 18169-18175
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    Impact of kilobar pressures on ultrafast triazene and thiacyanine photodynamics

    L. Grimmelsmann, V. Schuabb, B. Tekin, R. Winter and P. Nuernberger, Phys. Chem. Chem. Phys., 2018, 20, 18169
    DOI: 10.1039/C8CP03334J

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