Publication

Photochromic Bis(thiophen-3-yl)maleimides Studied with Time-Resolved Spectroscopy

Elsner, C., Cordes, T., Dietrich, P., Zastrow, M., Herzog, T. T., Rück-Braun, K. & Zinth, W., 2009, In : The Journal of Physical Chemistry. A: Molecules, Spectroscopy, Kinetics, Environment, & General Theory. 113, 6, p. 1033-1039 7 p.

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DOI

  • C. Elsner
  • T. Cordes
  • P. Dietrich
  • M. Zastrow
  • T.T. Herzog
  • K. Rück-Braun
  • W. Zinth
The dynamics of the ring-closure reaction of three different bis(thiophen-3-yl)maleimides are investigated using ultrafast spectroscopy in the visible range. The structures of the molecules differ with respect to substitution of the thiophene ring and the maleimide. The experiments reveal reaction kinetics which point to the population of an excited electronic state for several nanoseconds. In the case of completely unsubstituted thiophene rings, a long excited-state lifetime (biexponential decay with 3 and 15 ns) can be observed. The remaining ultrafast absorption transients of this molecule are due to relaxational processes on the excited electronic potential energy surface. The ring-closure reaction has a small yield (
Original languageEnglish
Pages (from-to)1033-1039
Number of pages7
JournalThe Journal of Physical Chemistry. A: Molecules, Spectroscopy, Kinetics, Environment, & General Theory
Volume113
Issue number6
Publication statusPublished - 2009

ID: 2694797