Mechanism and Dynamics of Azobenzene Photoisomerization | Zendy

Thomas Schultz | Zendy; Jason Quenneville | Zendy; Benjamin G. Levine | Zendy; Alessandro Toniolo | Zendy; Todd J. Martı́nez | Zendy; Stefan Lochbrunner | Zendy; Michael Schmitt | Zendy; James P. Shaffer | Zendy; Marek Z. Zgierski | Zendy; Albert Stolow | Zendy

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Mechanism and Dynamics of Azobenzene Photoisomerization

Author(s) -

Thomas Schultz,

Jason Quenneville,

Benjamin G. Levine,

Alessandro Toniolo,

Todd J. Martı́nez,

Stefan Lochbrunner,

Michael Schmitt,

James P. Shaffer,

Marek Z. Zgierski,

Albert Stolow

Publication year - 2003

Publication title -

journal of the american chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 7.115

H-Index - 612

eISSN - 1520-5126

pISSN - 0002-7863

DOI - 10.1021/ja021363x

Subject(s) - photoisomerization , chemistry , azobenzene , excited state , isomerization , femtosecond , ab initio , degenerate energy levels , photochemistry , mechanism (biology) , dynamics (music) , chemical physics , quantum , quantum yield , femtochemistry , computational chemistry , atomic physics , molecule , laser , quantum mechanics , physics , organic chemistry , acoustics , fluorescence , catalysis

The excited-state dynamics of trans-azobenzene were investigated by femtosecond time-resolved photoelectron spectroscopy and ab initio molecular dynamics. Two near-degenerate pipi* 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.

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