期刊
STRUCTURAL DYNAMICS-US
卷 6, 期 4, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.5118005
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资金
- European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie Grant [674960]
- Villum Experiment Grant from The Villum Foundation [23177]
- European Research Council-AdG [320459]
- Villum Fonden [00023177] Funding Source: researchfish
Dimers of tetracene molecules are formed inside helium nanodroplets and identified through covariance analysis of the emission directions of kinetic tetracene cations stemming from femtosecond laser-induced Coulomb explosion. Next, the dimers are aligned in either one or three dimensions under field-free conditions by a nonresonant, moderately intense laser pulse. The experimental angular covariance maps of the tetracene ions are compared to calculated covariance maps for seven different dimer conformations and found to be consistent with four of these. Additional measurements of the alignment-dependent strong-field ionization yield of the dimer narrow the possible conformations down to either a slipped-parallel or parallel-slightly rotated structure. According to our quantum chemistry calculations, these are the two most stable gas-phase conformations of the dimer and one of them is favorable for singlet fission. (C) 2019 Author(s).
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