Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5375512 | Chemical Physics | 2009 | 8 Pages |
Abstract
Four newly synthesized Hemithioindigo-based peptide-switches with changing meta/para-substitution-pattern within the stilbene-part of the molecule are characterized with time-resolved absorption spectroscopy. The different substances undergo a light-induced Z/E-isomerization: the reaction proceeds on a picosecond timescale with time constants <50 ps for the Z â E photoreaction and <10 ps for the inverse process from E â Z. The reaction times strongly depend on the specific substitution-pattern: fast reaction dynamics (<10 ps) are observed for the direct attachment of electron donating groups in the para-position. The molecular mechanism of the isomerization-process can be described with the same reaction model as used for related systems. The presented Hemithioindigos are hence promising alternatives to Azobenzene-switches due to their fast switching speed, improved spectral characteristics and an improved stability.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Thorben Cordes, Cord Elsner, Teja T. Herzog, Christian Hoppmann, Torsten Schadendorf, Wolfram Summerer, Karola Rück-Braun, Wolfgang Zinth,