Femto- to Nanosecond Time-Resolved Pump-Probe Spectroscopy on Electron Transfer in Ferrocenophanone/Oxazine-1, Merocyanine-3/TiO2 and Acridine-Modified DNA
Year: 2003
Type: dissertation
Abstract: Special Issues of the ultrafast electron transfer dynamics in the following donor/acceptor-systems were investigated: (1) Ferrocenophanone/Oxazine-1 in methylene-chloride. It was shown that the time constants of the fs-time-resolved IR-absorption spectra were identical to the UV/VIS spectra. An alternative method to monitor the charge transfer processes was established which is suitable for the investigation of donor/acceptor-systems containing small molecules whose absorption in the UV is superimposed by other optical transitions. (2) Merocyanine-3/TiO 2 in aqueous solution. The strongly dispersive recombination dyanmics in the ns-ms time window was studied and theoretical models for explanation were discussed. (3) Short acridine-modified DNA-double-strands in aqueous solution. The activation energy of the time-resolved oxidation-dyanmics of guanine was determined for the first time by temperature dependent measurements as a function of duplex sequence.
Author: Reinhard Haselsberger
Language: English
Subfield: Physical and Theoretical Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2753850158