Photoinduced Charge Transfer between Metal Halide Perovskite and Ru-Polypyridyl Complexes Toward Biocatalytic...

Area of Science:

• Materials Science
• Photocatalysis
• Biochemistry

Background:

• Vacancy-ordered bismuth-based perovskites (CBB) possess Lewis acidity for organic transformations.
• Bismuth perovskites (CBB) have tunable optoelectronic properties, making them suitable photocatalysts.
• Ru(II)-polypyridyl photosensitizers (RuPS) are classical photosensitizers for light-driven reactions.

Purpose of the Study:

• To conjugate CBB with RuPS to create a hybrid material (CBB/RuPS).
• To investigate the photoinduced electron transfer dynamics within the CBB/RuPS hybrid.
• To explore the application of the CBB/RuPS hybrid in photo-biocatalytic reactions and its potential cytotoxicity.

Main Methods:

• Synthesis and characterization of the CBB/RuPS hybrid material using spectroscopic and microscopic techniques.
• Ultrafast time-resolved spectroscopy to study charge transfer dynamics and recombination.
• In vitro photo-biocatalytic assays to evaluate substrate transformation and cytotoxicity.

Main Results:

• Successful formation of the CBB/RuPS hybrid material confirmed.
• Photoinduced electron transfer from CBB to RuPS observed within 200-300 ps, suppressing charge recombination.
• Demonstrated efficient exciton diffusion for tandem oxidative and reductive transformations in photo-biocatalysis.
• Exhibited potential cytotoxicity towards cancer cells via metabolic disruption and reactive oxygen species generation.

Conclusions:

• The CBB/RuPS hybrid material is a promising platform for efficient photocatalysis and photo-biocatalysis.
• The hybrid facilitates rapid electron transfer and suppressed recombination, enabling complex redox reactions.
• The material shows potential for targeted cancer therapy through photo-biocatalytic mechanisms.