Li, Bei and Liao, Sheng and Li, Jiayu and Chen, Xi and Zhang, Xue and Zhao, Jianzhang and Li, Ming-De and Dick, Bernhard and Mazzone, Gloria and Gurzadyan, Gagik G. (2025) Excited state dynamics of a Bodipy derivative with a twisted molecular structure: Combined experimental and theoretical studies. JOURNAL OF CHEMICAL PHYSICS, 162 (5): 054309. ISSN 0021-9606, 1089-7690
Full text not available from this repository. (Request a copy)Abstract
The photophysical properties of a boron dipyrromethene (Bodipy, BDP) derivative (BDP-SA) in which one F atom at the BDP core was replaced by an O atom and condensed with salicylaldehyde were investigated. This compound has a twisted molecular structure and unusually low fluorescence quantum yield (1% in toluene). No intersystem crossing was observed with a nanosecond transient absorption study. The triplet state lifetime of BDP-SA was determined to be 115 mu s by photosensitizing. Femtosecond transient absorption shows a structure relaxation of similar to 1.5 ps for the S-1 excited state. Theoretical studies show conical intersections, which are responsible for the efficient non-radiative decay of the S-1 state, which has extremely weak fluorescence.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | DESIGN; SOLVENT; SINGLET; PHOTOSENSITIZERS; PHOTODYNAMICS; SELECTIVITY; INDICATORS; SENSORS; DYES; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry III - Physical Chemistry (Molecular Spectroscopy and Photochemistry) > Prof. Dr. Bernhard Dick |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 20 Apr 2026 12:37 |
| Last Modified: | 20 Apr 2026 12:37 |
| URI: | https://pred.uni-regensburg.de/id/eprint/67608 |
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