Lowest Excited Singlet State of C60: A Vibronic Analysis of the Fluorescence

van den Heuvel, D. J.; van den Berg, G. J. B.; Groenen, E. J. J.; Schmidt, J.; Holleman, I.; Meijer, Gerard

doi:10.1021/j100030a004

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Lowest Excited Singlet State of C₆₀: A Vibronic Analysis of the Fluorescence

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van den Heuvel, D. J., van den Berg, G. J. B., Groenen, E. J. J., Schmidt, J., Holleman, I., & Meijer, G. (1995). Lowest Excited Singlet State of C₆₀: A Vibronic Analysis of the Fluorescence. The Journal of Physical Chemistry, 99(30), 11644-11649. doi:10.1021/j100030a004.

Cite as: https://hdl.handle.net/21.11116/0000-000C-0837-E

Abstract

The fluorescence and fluorescence-excitation spectra of C₆₀ in a hydrocarbon glass at 1.2 K are reported.The fluorescence spectrum resembles that of a molecular X-trap in crystalline C₆₀. The vibronic bands in these spectra are assigned, and the intensity distribution among the false origins points to vibronic coupling within the singlet manifold. The lowest excited singlet state of Cm shows predominantly T_1g and G₉ character. Additionally, we show that a reduction of the symmetry of C₆₀ by either an intra- or an intermolecular perturbation leads to a fluorescence spectrum with a strong 0-0 transition and a different vibronic structure.