Cover Picture: Mechanistic Origin of the Vibrational Coherence Accompanying the Photoreaction of Biomimetic Molecular Switches (Chem. Eur. J. 48/2012)

Authors

  • Dr. Jérémie Léonard,

    1. Institut de Physique et Chimie des Matériaux de Strasbourg, IPCMS-DON, CNRS—Université de Strasbourg, 23 rue du Loess, 67034 Strasbourg (France), Fax: (+33) 3-88-10-7245
    Search for more papers by this author
    • J. Léonard and I. Schapiro contributed equally to the work.

  • Dr. Igor Schapiro,

    1. Chemistry Department, Bowling Green State University, Bowling Green, OH 43403 (USA)
    Search for more papers by this author
    • J. Léonard and I. Schapiro contributed equally to the work.

  • Dr. Julien Briand,

    1. Institut de Physique et Chimie des Matériaux de Strasbourg, IPCMS-DON, CNRS—Université de Strasbourg, 23 rue du Loess, 67034 Strasbourg (France), Fax: (+33) 3-88-10-7245
    Search for more papers by this author
  • Dr. Stefania Fusi,

    1. Dipartimento di Chimica, Università degli Studi di Siena via Aldo Moro 2, 53100 Siena (Italy)
    Search for more papers by this author
  • Dr. Riccardo Rossi Paccani,

    1. Dipartimento di Chimica, Università degli Studi di Siena via Aldo Moro 2, 53100 Siena (Italy)
    Search for more papers by this author
  • Prof. Massimo Olivucci,

    Corresponding author
    1. Chemistry Department, Bowling Green State University, Bowling Green, OH 43403 (USA)
    2. Dipartimento di Chimica, Università degli Studi di Siena via Aldo Moro 2, 53100 Siena (Italy)
    • Chemistry Department, Bowling Green State University, Bowling Green, OH 43403 (USA)
    Search for more papers by this author
  • Prof. Stefan Haacke

    Corresponding author
    1. Institut de Physique et Chimie des Matériaux de Strasbourg, IPCMS-DON, CNRS—Université de Strasbourg, 23 rue du Loess, 67034 Strasbourg (France), Fax: (+33) 3-88-10-7245
    • Institut de Physique et Chimie des Matériaux de Strasbourg, IPCMS-DON, CNRS—Université de Strasbourg, 23 rue du Loess, 67034 Strasbourg (France), Fax: (+33) 3-88-10-7245
    Search for more papers by this author

Abstract

original image

Coherent photoisomerization is a rare, ultrafast process in which the photon energy activates a selected set of reactive vibrational modes, thus ensuring efficient photomechanical energy conversion. In their Full Paper on page 15296 ff., M. Olivucci, S. Haacke et al. combine experimental and theoretical approaches to investigate this process in a model molecular switch. Transient absorption reveals signatures of a quantum vibrational wave packet that drives the molecular motion from the electronic excited S1 to the ground S0 states, thus mimicking energy conversion in rhodopsin. Pronounced out-of-plane motions are predicted to modulate the π-orbital overlap across the twisted C[DOUBLE BOND]C bond after decay to S0, and are held responsible for the observed oscillations.

Ancillary