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Spectroscopy and photophysics of 5-deazaalloxazine derivatives. Experimental and theoretical approaches
Mateusz Gierszewski
Abstract
Spectral and photophysical properties of 5-deazaalloxazine (5DAll), its methyl derivatives, 10-ethyl-5-deazaisoalloxazine (10Et-5DIzoAll) and alloxazine derivatives with four ring structure have been investigated using experimental and theoretical approach. UV/Vis absorption and emission spectroscopy have been used to describe the electronic structure of studied molecules. Values of the fluorescence quantum yield determined are relatively high, the fluorescence lifetimes are relatively long comparing to respective alloxazines. Both spectral and photophysical properties of 10Et-5DIzoAll and 5DAll derivatives are different as compared to the respective iso- and alloxazines. The electronic structures of molecules and the predicted energies of singlet → singlet, singlet → triplet and triplet → triplet transitions have been determined using the DFT and ab-inito methods. For 5DAll derivatives and for alloxazine derivatives with four ring structure the S0→S1 transition has been found having π,π* character. The triplet lifetime for 5DAll derivatives have been found in a microsecond time range. It has been found that 5DAll derivatives can be used as efficient photosensitizers of singlet oxygen. The applications of the synchronous fluorescence spectroscopy have been implemented, especially in studies of mixtures of flavin and 5-deazaflavin type of compounds.- Record ID
- UAMceee876028934e74984b134903556a23
- Diploma type
- Doctor of Philosophy
- Author
- Title in Polish
- Spektroskopia i fotofizyka pochodnych 5-deazaalloksazyny. Ujęcie eksperymentalne i teoretyczne
- Title in English
- Spectroscopy and photophysics of 5-deazaalloxazine derivatives. Experimental and theoretical approaches
- Language
- pol (pl) Polish
- Certifying Unit
- Wydział Chemii [nowa struktura organizacyjna] (SNŚ/WC)
- Scientific discipline (2.0)
- Status
- Finished
- Year of creation
- 2015
- Defense Date
- 15-06-2015
- Title date
- 15-06-2015
- Supervisor
- URL
- https://hdl.handle.net/10593/13251 Opening in a new tab
- Keywords in English
- Spectroscopy, Photophysics, Flawins, Tlen singletowy, 5-deazaalloxazines
- Abstract in English
- Spectral and photophysical properties of 5-deazaalloxazine (5DAll), its methyl derivatives, 10-ethyl-5-deazaisoalloxazine (10Et-5DIzoAll) and alloxazine derivatives with four ring structure have been investigated using experimental and theoretical approach. UV/Vis absorption and emission spectroscopy have been used to describe the electronic structure of studied molecules. Values of the fluorescence quantum yield determined are relatively high, the fluorescence lifetimes are relatively long comparing to respective alloxazines. Both spectral and photophysical properties of 10Et-5DIzoAll and 5DAll derivatives are different as compared to the respective iso- and alloxazines. The electronic structures of molecules and the predicted energies of singlet → singlet, singlet → triplet and triplet → triplet transitions have been determined using the DFT and ab-inito methods. For 5DAll derivatives and for alloxazine derivatives with four ring structure the S0→S1 transition has been found having π,π* character. The triplet lifetime for 5DAll derivatives have been found in a microsecond time range. It has been found that 5DAll derivatives can be used as efficient photosensitizers of singlet oxygen. The applications of the synchronous fluorescence spectroscopy have been implemented, especially in studies of mixtures of flavin and 5-deazaflavin type of compounds.
- Thesis file
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- File: 1
- Spektroskopia i fotofizyka pochodnych 5-deazaalloksazyny. Ujęcie eksperymentalne i teoretyczne, File praca doktorska_Mateusz Gierszewski.pdf / 13 MB
- praca doktorska_Mateusz Gierszewski.pdf
- publication date:
- Spektroskopia i fotofizyka pochodnych 5-deazaalloksazyny. Ujęcie eksperymentalne i teoretyczne, File praca doktorska_Mateusz Gierszewski.pdf / 13 MB
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- Uniform Resource Identifier
- https://researchportal.amu.edu.pl/info/phd/UAMceee876028934e74984b134903556a23/
- URN
urn:amu-prod:UAMceee876028934e74984b134903556a23