Berlin 2014 – scientific programme
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MO: Fachverband Molekülphysik
MO 13: Posters 3: Cold Molecules, Helium Nano Droplets, and Experimental Techniques
MO 13.32: Poster
Wednesday, March 19, 2014, 16:30–18:30, Spree-Palais
Vibronic line-shapes of polymeric cis-Indolenine squaraine dyes — •Christoph Brüning1, Eileen Welz1, Sebastian F. Völker2, Christoph Lambert2, and Volker Engel1 — 1Universität Würzburg, Institut für Physikalische und Theoretische Chemie, Emil-Fischer-Str. 42, 97074 Würzburg — 2Universität Würzburg, Institut für Organische Chemie, Am Hubland, 97074 Würzburg
Using a vibronic coupling model we analyze measured absorption and emission spectra of cyclic polymeric cis-Indolenine squaraine dyes. From theory, features in the absorption spectra are identified as vibronic structures. The trimer exhibits unusual emission properties which can be explained taking at least two intra-monomer vibrational modes and a geometry distortion disturbing the symmetry into account.