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Intramolecular Charge Transfer Probed by Femtosecond Stimulated Raman Spectroscopy

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The intramolecular charge transfer of a fluorescent dye DCM has been explored by femtosecond stimulated Raman spectroscopy with both high temporal (<50 fs) and spectral resolutions (<10 cm−1). Distinct vibrational spectra of the locally-excited and charge-transferred conformers of DCM in the excited state were observed in DMSO and chloroform solutions. We propose that a twisted molecular geometry in the electron donating group (dimethylamino or dimethylaminophenyl) would be favored in the intramolecular charge transfer state of DCM.

© 2018 The Author(s)

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