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"Mechanism and Dynamics of Azobenzene Photoisomerization" T. Schultz, J. Quenneville, B. Levine, A. Toniolo, T. J. Martinez, S. Lochbrunner, M. Schmitt, J. P. Shaffer, M. Z. Zgierski, A. StolowJ. Am. Chem. Soc. 125, 8098 (2003) Abstract: The excited-state dynamics of trans-azobenzene were investigated by femtosecond time-resolved photoelectron spectroscopy and ab initio molecular dynamics. Two near-degenerate &pi&pi* excited states, S2 and S3,4, were identified in a region hitherto associated with only one excited state. These results help to explain contradictory reports about the photoisomerization mechanism and the wavelength dependence of the quantum yield. A new model for the isomerization mechanism is proposed. This publication has not been written at BMO BMO authors (in alphabetic order): Stefan Lochbrunner  WWW-Version |