Although surface redox processes greatly impact the properties and behavior of colloidal semiconductor nanocrystals (NCs), spectroscopic characterization of redox-active localized surface sites is limited. We have functionalized CdSe and CdS NCs with organometallic [Fe(CO)<sub>4</sub>]<sup>2-</sup> fragments that mimic the surface chalcogenide atoms. These fragments enable in situ monitoring of NC surface charge using FTIR spectroscopy. Using this molecular reporter, we have identified the accumulation of multiple negative surface charges under photoexcitation that persist for many hours under anaerobic conditions.

Organometallic functionalization of colloidal semiconductor nanocrystal surfaces

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

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