Organofunctionalized borotungstate polyoxometalates as tunable photocatalysts for oxidative dimerization of amines

Tsang, Nicole; Kibler, Alexander J.; Argent, Stephen P.; Lam, Hon Wai; Jones, Kieran D.; Newton, Graham N.

Abstract

Organofunctionalized borotungstate Keggin polyoxometalates, (nBu4N)3H[HBW11O39(P(O)Ph)2] (PBW11), (nBu4N)3H[HBW11O39(As(O)Ph)2] (AsBW11), and (nBu4N)4[HBW11O39(PhSiOSiPh)] (SiBW11), were synthesized and structurally characterized. Cyclic voltammetry showed that the electronic properties of the clusters are dependent on the nature of the appended main group atoms (P, As, or Si). The first reduction potentials were found to shift positively with respect to that of the unmodified parent species (nBu4N)5[BW12O40], with PBW11 showing the largest shift at +100 mV. All clusters were evaluated as photocatalysts for the oxidative dimerization of amines where the organophosphonate hybrid PBW11 was found to be the most active. This study demonstrates how organofunctionalization of polyoxometalates may be used to tune and improve their performance as photocatalysts for organic reactions.

Citation

Tsang, N., Kibler, A. J., Argent, S. P., Lam, H. W., Jones, K. D., & Newton, G. N. (2024). Organofunctionalized borotungstate polyoxometalates as tunable photocatalysts for oxidative dimerization of amines. Chemical Science, 15(36), 14685-14691. https://doi.org/10.1039/d4sc03534h

• Journal Article Type: Article
• Acceptance Date: Aug 11, 2024
• Online Publication Date: Aug 12, 2024
• Publication Date: Sep 28, 2024
• Deposit Date: Aug 27, 2024
• Publicly Available Date: Sep 4, 2024
• Journal: Chemical Science
• Print ISSN: 2041-6520
• Electronic ISSN: 2041-6539
• Publisher: Royal Society of Chemistry
• Peer Reviewed: Peer Reviewed
• Volume: 15
• Issue: 36
• Pages: 14685-14691
• DOI: https://doi.org/10.1039/d4sc03534h
• Public URL: https://nottingham-repository.worktribe.com/output/38648187
• Publisher URL: https://pubs.rsc.org/en/content/articlelanding/2024/sc/d4sc03534h