Toele, P. and Zhang, H. and Trieflinger, C. and Daub, Joerg and Glasbeek, M. (2003) Femtosecond fluorescence upconversion study of a boron dipyrromethene dye in solution. CHEMICAL PHYSICS LETTERS, 368 (1-2). pp. 66-75. ISSN 0009-2614
Full text not available from this repository.Abstract
A femtosecond fluorescence upconversion study is reported for the boron-dipyrromethene (BDP) dye, 2,6-diethyl-1,3,5,7-tetramethyl-8-phenyl-4-difluorobora-3a,4a-diaza-(s)-indacene (BDP-1), dissolved in cyclohexane, chloroform and acetonitrile. After pulsed photoexcitation into the higher excited states, S-2 or S-3 (at energies of similar to26 300 cm(-1) and similar to30 000 cm(-1) above the S-0 state, respectively), the fluorescence from the S-1 state shows an ultrafast solvent-dependent rise, with characteristic times between 100 and 230 fs. The rise is attributed to S-n --> S-1 (n - 2,3) internal conversion followed by vibrational relaxation. In addition, the BDP-1 fluorescence shows picosecond transient behavior that is attributed to vibrational cooling in the excited S-1 state. (C) 2002 Elsevier Science B.V. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | TIME-RESOLVED FLUORESCENCE; SOLVATION DYNAMICS; INTERNAL-CONVERSION; VIBRONIC RELAXATION; PROTON-TRANSFER; SPECTROSCOPY; STATE; COUMARIN-153; DERIVATIVES; SOLVENT; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Organische Chemie > Alumni or Retired Professors > Prof. Dr. Jörg Daub |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 25 Aug 2021 10:12 |
| Last Modified: | 25 Aug 2021 10:12 |
| URI: | https://pred.uni-regensburg.de/id/eprint/39361 |
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