TY - JOUR
T1 - Simulation of the photodeactivation of formamide in the nO - π and π - π *states
T2 - An ab initio on-the-fly surface-hopping dynamics study
AU - Antol, Ivana
AU - Eckert-Maksić, Mirjana
AU - Barbatti, Mario
AU - Lischka, Hans
N1 - Funding Information:
The authors acknowledge support by the WTZ Treaty between Austria and Croatia (Project No. 9/2006) and by the Austrian Science Fund within the framework of the Special Research Program F16 (H.L. and M.B.) and the Project No. P18411-N19. The work in Zagreb (I.A. and M.E.M.) has been supported by the Ministry of Science and Technology of Croatia through the Project No. 098-0982933-2920 and the COST D37 Action. The calculations were performed in part on the Schroedinger III Linux Cluster of the Vienna University Computer Centre.
PY - 2007
Y1 - 2007
N2 - The short-time photodynamics (1 ps) of formamide in its low-lying singlet excited nO - π* and π - π* states have been investigated by the direct trajectory surface-hopping method based on multiconfigurational ab initio calculations. The simulations showed that in both states, the primary deactivation process is C-N bond dissociation. In the ground state, the energy is transferred to (a) translational motion of the HCO and N H2 fragments, (b) additional C-H dissociation from the vibrationally hot HCO fragment, or (c) formation of N H3 and CO. In addition to the C-N dissociation pathway, C-O bond fission is found to be an additional primary deactivation path in the π - π* dynamics. From fractional occupations of trajectories, lifetimes of formamide were estimated: τ (S1) =441 fs and τ (S2) =66 fs.
AB - The short-time photodynamics (1 ps) of formamide in its low-lying singlet excited nO - π* and π - π* states have been investigated by the direct trajectory surface-hopping method based on multiconfigurational ab initio calculations. The simulations showed that in both states, the primary deactivation process is C-N bond dissociation. In the ground state, the energy is transferred to (a) translational motion of the HCO and N H2 fragments, (b) additional C-H dissociation from the vibrationally hot HCO fragment, or (c) formation of N H3 and CO. In addition to the C-N dissociation pathway, C-O bond fission is found to be an additional primary deactivation path in the π - π* dynamics. From fractional occupations of trajectories, lifetimes of formamide were estimated: τ (S1) =441 fs and τ (S2) =66 fs.
UR - http://www.scopus.com/inward/record.url?scp=37549007133&partnerID=8YFLogxK
U2 - 10.1063/1.2804862
DO - 10.1063/1.2804862
M3 - Article
C2 - 18154378
AN - SCOPUS:37549007133
SN - 0021-9606
VL - 127
JO - Journal of Chemical Physics
JF - Journal of Chemical Physics
IS - 23
M1 - 234303
ER -