Ultrafast structural dynamics of photochromic indolylfulgimides studied by vibrational spectroscopy and DFT calculations |
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| Authors: | Koller Florian O Schreier Wolfgang J Schrader Tobias E Sieg Arne Malkmus Stephan Schulz Christine Dietrich Steffen Rück-Braun Karola Zinth Wolfgang Braun Markus |
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| Institution: | BioMolekulare Optik, Department Physik, Ludwig-Maximilians-Universit?t München, Oettingenstrasse 67, D-80538 München, Germany. |
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| Abstract: | The structural dynamics of the ring-opening reaction in a photochromic indolylfulgimide, a reversible, ultrafast photoswitch, is investigated by ultra-broadband time-resolved vibrational spectroscopy. The experimentally observed vibrational modes of the indolylfulgimide photoisomers C and E are assigned to normal modes with the help of DFT calculations. A complete evaluation of the observed vibrational dynamics including excited-state vibrational modes is used to characterize the reaction path and the cooling behavior of the photoswitch. |
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