Photochemical reaction mechanisms of 4,5-dimethoxy-2-nitrobenzyl acetate analysed by a sub-10 fs near-ultraviolet pulse laser

Add time:07/14/2019    Source:sciencedirect.com

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.

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