Gratz, H. and Penzkofer, Alfons and Abels, Christoph and Szeimies, Rolf-Markus and Landthaler, Michael and Baeumler, Wolfgang (1999) Photo-isomerisation, triplet formation, and photo-degradation dynamics of indocyanine green solutions. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 128 (1-3). pp. 101-109. ISSN 1010-6030,
Full text not available from this repository. (Request a copy)Abstract
Indocyanine green sodium iodide (ICG-NaI) in dimethylsulfoxide (DMSO), methanol, water, and human plasma is excited with a chopped powerful diode laser at 812.5 nm (time resolution 20 mu s). Small transmission changes observed are analysed in terms of triplet formation, photo-isomerisation, photo-degradation, and thermal heating. Quantum yields of P-isomer formation and T-1-triplet formation as well as P-isomer and T-1 -triplet lifetimes are determined. For nitrogen-bubbled ICG-NaI in DMSO a quantum yield of triplet formation of phi(T) approximate to 5 x 10(-5) and a triplet-state lifetime of tau(T) approximate to 700 mu s an determined. For ICG-NaI in methanol a quantum yield of P-isomer formation of phi(p) approximate to 2.4 x 10(-4) and a P-isomer lifetime of t(p) approximate to 430 mu s are obtained. (C) 1999 Elsevier Science S.A. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | FLUORESCENCE SPECTROSCOPIC ANALYSIS; LASER-DYES; P-ISOMERS; AGGREGATION; ABSORPTION; WATER; PHOTOPHYSICS; PHOTOTHERAPY; STABILITY; THERAPY; indocyanine green; dimethylsulfoxide; human plasma; intersystem crossing; tripler quantum yield; tripler lifetime; photo-isomerisation; photo-degradation; photoisomer lifetime; heating effects |
| Subjects: | 500 Science > 530 Physics 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Dermatologie und Venerologie Physics > Institute of Experimental and Applied Physics > Alumni or Retired Professors > Group Alfons Penzkofer |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 13 Dec 2022 09:22 |
| Last Modified: | 13 Dec 2022 09:22 |
| URI: | https://pred.uni-regensburg.de/id/eprint/48886 |
Actions (login required)
 |
View Item |
