Ultrafast dynamics through conical intersections and intramolecular vibrational energy redistribution in styrene
| Autor: | Michael A. Robb, Michael J. Bearpark, Roman Spesyvtsev, A. D. G. Nunn, Helen H. Fielding, Russell S. Minns |
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| Rok vydání: | 2010 |
| Předmět: |
Models
Molecular Chemical Phenomena Ultraviolet Rays Chemistry Lasers Photoelectron Spectroscopy General Physics and Astronomy Conical intersection Photochemistry X-ray photoelectron spectroscopy Excited state Femtosecond Singlet state Physical and Theoretical Chemistry Time-resolved spectroscopy Atomic physics Spectroscopy Algorithms Styrene Excitation |
| Zdroj: | Physical Chemistry Chemical Physics. 12:15751 |
| ISSN: | 1463-9084 1463-9076 |
| DOI: | 10.1039/c0cp01723j |
| Popis: | We report a femtosecond time-resolved photoelectron spectroscopy (TRPES) investigation of internal conversion in the first two excited singlet electronic states of styrene. We find that radiationless decay through an S(1)/S(0) conical intersection occurs on a timescale of ∼4 ps following direct excitation to S(1) with 0.6 eV excess energy, but that the same process is significantly slower (∼20 ps) if it follows internal conversion from S(2) to S(1) after excitation to S(2) with 0.3 eV excess energy (0.9 eV excess energy in S(1)). |
| Databáze: | OpenAIRE |
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