Ultrafast electron/energy transfer and intersystem crossing mechanisms in bodipy-porphyrin compounds
Journal article, 2021

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.

Borondipyrromethene

Förster resonance energy transfer

Porphyrin

Ultrafast pump-probe spectroscopy

Author

Yusuf Tutel

Middle East Technical University (METU)

Ankara Universitesi

Gökhan Sevinç

Bilecik Seyh Edebali University

Betül Kücüköz

Ankara Universitesi

Chalmers, Physics, Nano and Biophysics

Elif Akhuseyin Yildiz

Ankara Universitesi

Ahmet Karatay

Ankara Universitesi

Fatih Mehmet Dumanoğulları

Ankara Universitesi

Halil Yılmaz

Ankara Universitesi

Mustafa Hayvali

Ankara Universitesi

A. Elmali

Ankara Universitesi

Processes

22279717 (eISSN)

Vol. 9 2 1-11 312

Subject Categories

Atom and Molecular Physics and Optics

Energy Systems

Organic Chemistry

DOI

10.3390/pr9020312

More information

Latest update

2/26/2021