Abstract
Herein, we report an efficient protocol for the selective oxidation of amines with the sole involvement of conduction band electrons (ecb−) of TiO2 for both the activation of O2 and the ensuing oxidation reaction. Visible light was harvested by dye molecules on the surface of TiO2, which injects electrons into its conduction band, generating dye radical cations. Charge transfers from dye radical cations to amines are relayed by the catalytic cycle of (2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO) to TEMPO+, which is an oxidant that can conduct the direct two-electron oxidation of amines to imines. TEMPO was regenerated by the oxidation of TEMPOH with superoxide generated by the interaction of ecb− and O2. This work suggests that one can exploit the strategy of cooperative photocatalysis with each component performing in its optimal role: TiO2 for O2 activation, dye for visible light harvesting, and TEMPO for oxidative transformations.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
