Photochemical reaction mechanisms of 4,5-dimethoxy-2-nitrobenzyl acetate analysed by a sub-10 fs near-ultraviolet pulse laser
Abstract
The present study examined the electronic dynamics of 4,5-dimethoxy-2-nitrobenzyl acetate after π-π* excitation. Pump-probe measurement using a near-ultraviolet sub-10 fs pulse laser revealed that the lifetime of the S*(π-π*) state is 500 fs after photoexcitation to produce the S*(n-π*) state and that the lifetime of the S*(n-π*) state is 1000 fs. By studying different alpha substituents, the lifetimes of the S*(π-π*) state and the S*(n-π*) were found to be independent on the alpha substituents.
- Publication:
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Chemical Physics
- Pub Date:
- August 2019
- DOI:
- 10.1016/j.chemphys.2019.04.031
- Bibcode:
- 2019CP....524...70H
- Keywords:
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- Real-time spectroscopy;
- Sub-10 fs pulse laser;
- O-Nitrobenzyl acetate;
- Photodegradation