Real-time Observation of Structural Dynamics Triggering Excimer Formation in a Perylene Bisimide Folda-dimer by Ultrafast Time-Domain Raman Spectroscopy
Please always quote using this URN: urn:nbn:de:bvb:20-opus-318788
- In π-conjugated organic photovoltaic materials, an excimer state has been generally regarded as a trap state which hinders efficient excitation energy transport. But despite wide investigations of the excimer for overcoming the undesirable energy loss, the understanding of the relationship between the structure of the excimer in stacked organic compounds and its properties remains elusive. Here, we present the landscape of structural dynamics from the excimer formation to its relaxation in a co-facially stacked archetypical perylene bisimideIn π-conjugated organic photovoltaic materials, an excimer state has been generally regarded as a trap state which hinders efficient excitation energy transport. But despite wide investigations of the excimer for overcoming the undesirable energy loss, the understanding of the relationship between the structure of the excimer in stacked organic compounds and its properties remains elusive. Here, we present the landscape of structural dynamics from the excimer formation to its relaxation in a co-facially stacked archetypical perylene bisimide folda-dimer using ultrafast time-domain Raman spectroscopy. We directly captured vibrational snapshots illustrating the ultrafast structural evolution triggering the excimer formation along the interchromophore coordinate on the complex excited-state potential surfaces and following evolution into a relaxed excimer state. Not only does this work showcase the ultrafast structural dynamics necessary for the excimer formation and control of excimer characteristics but also provides important criteria for designing the π-conjugated organic molecules.…
Author: | Yongseok Hong, Woojae Kim, Taeyeon Kim, Christina Kaufmann, Hyungjun Kim, Frank WürthnerORCiDGND, Dongho Kim |
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URN: | urn:nbn:de:bvb:20-opus-318788 |
Document Type: | Journal article |
Faculties: | Fakultät für Chemie und Pharmazie / Institut für Organische Chemie |
Language: | English |
Parent Title (English): | Angewandte Chemie International Edition |
Year of Completion: | 2022 |
Volume: | 61 |
Issue: | 13 |
Article Number: | e202114474 |
Source: | Angewandte Chemie International Edition 2022, 61(13):e202114474. DOI: 10.1002/anie.202114474 |
DOI: | https://doi.org/10.1002/anie.202114474 |
Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 54 Chemie / 547 Organische Chemie |
Tag: | excimer; perylene bisimide; structural dynamics; time-resolved impulsive stimulated raman spectroscopy; vibrational coherence |
Release Date: | 2023/07/31 |
Licence (German): | CC BY: Creative-Commons-Lizenz: Namensnennung 4.0 International |