Author/Authors :
Ludwig، نويسنده , , Valdemir and da Costa، نويسنده , , Zélia M. and do Amaral، نويسنده , , Marcos Serrou and Borin، نويسنده , , Antonio Carlos and Canuto، نويسنده , , Sylvio and Serrano-Andrés، نويسنده , , Luis، نويسنده ,
Abstract :
The sequential Monte Carlo/CASPT2 approach was employed to investigate deactivation and emission processes from the lowest-lying ππ∗ and nπ∗ excited states of 9H-adenine in aqueous solution. It is found that conical intersections connecting the ππ∗ and nπ∗ states with the ground state are also present in solution, whereas the barriers for the deactivation paths are significantly smaller on solvated conditions. The large destabilization of the nπ∗ state found in solution possibly prevents its involvement in the deactivation photophysics and explains the change from a bi- to a mono-exponential decay for the molecule in the gas phase and solution, respectively.
