Proceedings of the Eighth Conference on Time-Resolved Vibrational SpectroscopyView this Special Issue
Terry L. Gustafson, James D. Leonard, " Picosecond Transient Raman Spectra of S1 Bis(Methylstyryl)- Benzene: Observation of S1←Resonance Emission", Laser Chemistry, vol. 19, Article ID 084079, 4 pages, 1999. https://doi.org/10.1155/1999/84079
Picosecond Transient Raman Spectra of S1 Bis(Methylstyryl)- Benzene: Observation of S1←Resonance Emission
We have been studying the excited state spectra of several molecules related to electroluminescent conducting polymers. The excited state structure corresponds to the conducting state in these systems. We have obtained data on 1,4-bis(2,2′-methylstyryl)- benzene (2MSB) as a model system of poly (P-phenylenevinylene) (PPV). We observe both sharp and broad features in the spectra. The sharp bands occur at a constant energy shift relative to the probe wavelength. We attribute the sharp bands to resonance Raman bands of the S1 state of 2MSB. We assign the broad band at ∼740 nm to resonance emission between and S1. We believe that this is the first observation of resonance secondary radiation (RSR) between two electronically excited states in a large molecule.
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