Perovskite nanocrystals have recently been shown as promising photocatalysts for selective carbon-carbon bond formation. Although exceptionally high photocatalytic activities are being demonstrated for various organic substrates, the fundamental reaction mechanism remains underexplored to the community. Additionally, it is not clear how the catalyst design, for instance the nanocrystal size and surface chemistry, can affect the reaction activity. Here, we applied transient absorption spectroscopy to study the photo-induced charge transfer process between CsPbBr<sub>3</sub> nanocrystal and various organic substrates. Key reaction steps in the proposed reaction mechanism are identified, and reaction intermediates are arrested. We further show how the photo-induced charge transfer process can be tuned with surface chemistry by tuning the surface redox activity of nanocrystals. Our studies provide important insights into the photocatalytic reaction mechanism using colloidal quantum dots.

Understanding photocatalytic reaction on CsPbBr<sub>3</sub> nanocrystals through ultrafast spectroscopy and surface design

2019 Fall National Meeting

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.

Understanding photocatalytic reaction on CsPbBr3 nanocrystals through ultrafast spectroscopy and surface design

Understanding photocatalytic reaction on CsPbBr₃ nanocrystals through ultrafast spectroscopy and surface design