Excited-State Dynamics of trans- and cis-Azobenzene after UV Excitation in the ππ* Band
The Journal of Physical Chemistry A2004Vol. 108(30), pp. 6265–6271
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Abstract
Transient absorption measurements on cis- and trans-azobenzene after UV excitation in the ππ* band are presented and compared to data obtained after VIS excitation in the nπ* band. The data show a two-step process, where after a fast motion on the S2 potential energy surface the molecule relaxes to the S1 state and in both cases (trans → cis and cis → trans) the isomerization reaction involves large-amplitude motion on the S1 potential energy surface.
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