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Title: Photoinduced Charge Transfer versus Fragmentation Pathways in Lanthanum Cyclopentadienyl Complexes

Journal Article · · Journal of Chemical Theory and Computation
 [1];  [2]; ORCiD logo [3];  [4];  [4]; ORCiD logo [1]
  1. Univ. of South Dakota, Vermillion, SD (United States); North Dakota State Univ., Fargo, ND (United States)
  2. Chinese Academy of Sciences (CAS), Beijing (China). Shenyang Inst. of Automation
  3. North Dakota State Univ., Fargo, ND (United States)
  4. Univ. of South Dakota, Vermillion, SD (United States)

This study compares two competing pathways of photoexcitations in gas-phase metal–organic complexes: first, a sequence of phonon-assisted electronic transitions leading to dissipation of the energy of photoexcitations and, second, a sequence of light-driven electronic transitions leading to photolysis. Phonon-assisted charge carrier dynamics is investigated by combination of the density matrix formalism and on-the-fly nonadiabatic couplings. Light-driven fragmentation is modeled by a time-dependent excited-state molecular-dynamics (TDESMD) algorithm based on Rabi theory and principles similar to the trajectory surface hopping approximation. Numerical results indicate that, under the medium intensity of the laser field, light-driven electronic transitions are more probable than phonon-assisted ones. The formation of multiple products is observed in TDESMD trajectories. Simulated mass spectra are extracted from TDESMD simulations and compared to experimental photoionization time-of-flight (PI-TOF) mass spectra. It is found that several features in the experimental mass spectra are reproduced by the simulations.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-05CH11231; SC0001717
OSTI ID:
1480119
Journal Information:
Journal of Chemical Theory and Computation, Vol. 13, Issue 9; ISSN 1549-9618
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 21 works
Citation information provided by
Web of Science

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