Ultrafast Electron/Energy Transfer and Intersystem Crossing Mechanisms in BODIPY-Porphyrin Compounds
Autor: | Fatih Mehmet Dumanogullari, Elif Yildiz, Mustafa Hayvali, Ayhan Elmali, Halil Yılmaz, Ahmet Karatay, Gökhan Sevinç, Betül Küçüköz, Yusuf Tutel |
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Jazyk: | angličtina |
Rok vydání: | 2021 |
Předmět: |
Absorption spectroscopy
Bioengineering 02 engineering and technology 010402 general chemistry Photochemistry lcsh:Chemical technology 01 natural sciences ultrafast pump-probe spectroscopy lcsh:Chemistry chemistry.chemical_compound Chemical Engineering (miscellaneous) lcsh:TP1-1185 Process Chemistry and Technology Free base 021001 nanoscience & nanotechnology Porphyrin 0104 chemical sciences Photoexcitation borondipyrromethene Förster resonance energy transfer Intersystem crossing chemistry lcsh:QD1-999 Intramolecular force BODIPY 0210 nano-technology porphyrin |
Zdroj: | Processes, Vol 9, Iss 312, p 312 (2021) Processes Volume 9 Issue 2 |
ISSN: | 2227-9717 |
Popis: | Meso-substituted borondipyrromethene (BODIPY)-porphyrin compounds that include free base porphyrin with two different numbers of BODIPY groups (BDP-TTP and 3BDP-TTP) were designed and synthesized to analyze intramolecular energy transfer mechanisms of meso-substituted BODIPY-porphyrin dyads and the effect of the different numbers of BODIPY groups connected to free-base porphyrin on the energy transfer mechanism. Absorption spectra of BODIPY-porphyrin conjugates showed wide absorption features in the visible region, and that is highly valuable to increase light-harvesting efficiency. Fluorescence spectra of the studied compounds proved that BODIPY emission intensity decreased upon the photoexcitation of the BODIPY core, due to the energy transfer from BODIPY unit to porphyrin. In addition, ultrafast pump-probe spectroscopy measurements indicated that the energy transfer of the 3BDP-TTP compound (about 3 ps) is faster than the BDP-TTP compound (about 22 ps). Since the BODIPY core directly binds to the porphyrin unit, rapid energy transfer was seen for both compounds. Thus, the energy transfer rate increased with an increasing number of BODIPY moiety connected to free-base porphyrin. |
Databáze: | OpenAIRE |
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