Synthesis and Ultrafast Intramolecular Energy Transfer in BODIPY/Porphyrin-BOPHY Dyads

Area of Science:

• Organic Chemistry
• Photochemistry
• Materials Science

Background:

• Boron-dipyrromethene (BODIPY) and porphyrin derivatives are crucial in photochemistry.
• Understanding energy and electron transfer dynamics in molecular dyads is key for developing new functional materials.

Purpose of the Study:

• To synthesize and characterize novel BOPHY-BODIPY and BOPHY-porphyrin dyads.
• To investigate the excited state dynamics, including energy and electron transfer, in these dyads.

Main Methods:

• Covalent synthesis of BOPHY-BODIPY and BOPHY-porphyrin dyads.
• Pump-probe spectroscopy to analyze excited state dynamics.
• Characterization of synthesized compounds.

Main Results:

• BOPHY-BODIPY dyad (3) showed ultrafast energy transfer (345 fs) from BOPHY to BODIPY.
• BOPHY-BODIPY dyad (3) also exhibited electron transfer (14 ps) from BODIPY to BOPHY.
• BOPHY-porphyrin dyads (6 and 7) displayed rapid energy transfer (90-100 fs) from BOPHY to porphyrin, with no observed electron transfer.

Conclusions:

• The synthesized dyads demonstrate efficient BOPHY to acceptor energy transfer.
• The BOPHY-BODIPY dyad facilitates both energy and electron transfer, suggesting potential applications in molecular electronics.
• BOPHY-porphyrin dyads primarily exhibit energy transfer, highlighting tunable photophysical properties based on the acceptor unit.