Molecular Dynamics of Excited State Intramolecular Charge Transfer in Solution by Coherent Nuclear Wave Packets.

08:00 EDT 11th April 2019 | BioPortfolio

Summary of "Molecular Dynamics of Excited State Intramolecular Charge Transfer in Solution by Coherent Nuclear Wave Packets."

Revealing a proper reaction coordinate in a chemical reaction is the key step towards elucidation of the molecular reaction dynamics. In this report, we investigated dynamics of intramolecular charge transfer (ICT) of 8-aminopyrene-1,3,6-trisulfonic acid (APTS) occurring in the excited state by time-resolved fluorescence (TF) and TF spectra. Accurate reaction rates and rate-dependent nuclear wave packets in the product state allow detailed investigation of the molecular reaction dynamics. The ICT rate is solvent dependent; (34 fs)-1, (87 fs)-1, and (∞)-1 in water, formamide, and dimethylformamide, respectively. By recording spectra of the nuclear wave packets for different reaction rate, chemical species responsible for the emission spectra can be positively identified. Origin of the wave packets can be deduced from the amplitude change of the wave packets at different reaction rates, and the vibrational modes that are associated with the reaction coordinate could be identified. Theoretical calculations of the vibrational reorganization energies reproduce the experimental spectrum of the nuclear wave packets and corroborates the conclusions.


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This article was published in the following journal.

Name: Chemphyschem : a European journal of chemical physics and physical chemistry
ISSN: 1439-7641


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