{"paper":{"title":"Exciton Localization in Extended {\\pi}-electron Systems: Comparison of Linear and Cyclic Structures","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"physics.chem-ph","authors_text":"2) ((1) Department of Physics, (2) Institut f\\\"ur Experimentelle und Angewandte Physik, (3) Kekul\\'e-Institut f\\\"ur Organische Chemie und Biochemie der Universit\\\"at Bonn, Alexander Thiessen (1), Alissa Idelson (3), Astronomy, A. Vikas Aggarwal (3), Bonn, Dominik W\\\"ursch (2), Germany, Germany), Jan Vogelsang (2), John M. Lupton (1, Regensburg, Salt Lake City, Sebastian Bange (2), Sigurd H\\\"oger (3), Stefan-S. Jester (3), Universit\\\"at Regensburg, University of Utah, USA, UT","submitted_at":"2015-06-18T00:47:00Z","abstract_excerpt":"We employ five {\\pi}-conjugated model materials of different molecular shape --- oligomers and cyclic structures --- to investigate the extent of exciton self-trapping and torsional motion of the molecular framework following optical excitation. Our studies combine steady-state and transient fluorescence spectroscopy in the ensemble with measurements of polarization anisotropy on single molecules, supported by Monte Carlo simulations. The dimer exhibits a significant spectral red-shift within $\\sim$ 100 ps after photoexcitation which is attributed to torsional relaxation. This relaxation mecha"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.05522","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}