Excitonic coupling of RNA-templated merocyanine dimer studied by higher-order transient absorption spectroscopy
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- We report the synthesis and spectroscopic analysis of RNA containing the barbituric acid merocyanine rBAM2 as a nucleobase surrogate. Incorporation into RNA strands by solid-phase synthesis leads to fluorescence enhancement compared to the free chromophore. In addition, linear absorption studies show the formation of an excitonically coupled H-type dimer in the hybridized duplex. Ultrafast third- and fifth-order transient absorption spectroscopy of this non-fluorescent dimer suggests immediate (sub-200 fs) exciton transfer and annihilation dueWe report the synthesis and spectroscopic analysis of RNA containing the barbituric acid merocyanine rBAM2 as a nucleobase surrogate. Incorporation into RNA strands by solid-phase synthesis leads to fluorescence enhancement compared to the free chromophore. In addition, linear absorption studies show the formation of an excitonically coupled H-type dimer in the hybridized duplex. Ultrafast third- and fifth-order transient absorption spectroscopy of this non-fluorescent dimer suggests immediate (sub-200 fs) exciton transfer and annihilation due to the proximity of the rBAM2 units.…
Autor(en): | Julia Dietzsch, Ajay Jayachandran, Stefan Mueller, Claudia HöbartnerORCiD, Tobias BrixnerORCiD |
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URN: | urn:nbn:de:bvb:20-opus-327772 |
Dokumentart: | Preprint (Vorabdruck) |
Institute der Universität: | Fakultät für Chemie und Pharmazie / Institut für Organische Chemie |
Fakultät für Chemie und Pharmazie / Institut für Physikalische und Theoretische Chemie | |
Sprache der Veröffentlichung: | Englisch |
Titel des übergeordneten Werkes / der Zeitschrift (Englisch): | Chemical Communications |
Erscheinungsjahr: | 2023 |
Auflage: | submitted version |
Originalveröffentlichung / Quelle: | Chemical Communications (2023) 59:7395-7398. https://doi.org/10.1039/D3CC02024J |
DOI: | https://doi.org/10.1039/D3CC02024J |
Allgemeine fachliche Zuordnung (DDC-Klassifikation): | 5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften |
Freie Schlagwort(e): | Barbituric Acid Merocyanines; Higher-order Transient Absorption Spectroscopy; Nucleobase Surrogate Incorporation; rBAM2-labeled RNA strands |
Datum der Freischaltung: | 09.10.2023 |
Lizenz (Deutsch): | Deutsches Urheberrecht |