Expanding the Color Space in the Two-Color Heterogeneous Photocatalysis of Ullmann C–C Coupling Reactions

Marina, Nancy; Lanterna, Anabel E.; Scaiano, Juan C.

Abstract

The Ullmann reaction can be heterogeneously photocatalyzed by UV excitation of Pd@TiO2. While a similar dose of visible light does not initiate the reaction, combination with UV light enhances activity and selectivity toward cross-combination products. The reaction involves photoresponsive intermediates, likely associated with the catalyst, where Pd nanostructures can absorb visible radiation and TiO2, the UV component. Hence, a single hybrid-photoresponsive material can have different reactivity upon two-wavelength irradiation enabling direct tuning of yields and selectivity. This color-space expansion promises unprecedented uses in organic chemistry, where improvement in catalytic activity and selectivity will impact the development of catalytic processes with long-term multicycle performance.

Citation

Marina, N., Lanterna, A. E., & Scaiano, J. C. (2018). Expanding the Color Space in the Two-Color Heterogeneous Photocatalysis of Ullmann C–C Coupling Reactions. ACS Catalysis, 8(8), 7593-7597. https://doi.org/10.1021/acscatal.8b02026

• Journal Article Type: Article
• Acceptance Date: Jul 19, 2018
• Online Publication Date: Jul 19, 2018
• Publication Date: Aug 3, 2018
• Deposit Date: Jun 22, 2020
• Publicly Available Date: Jul 21, 2020
• Journal: ACS Catalysis
• Electronic ISSN: 2155-5435
• Publisher: American Chemical Society
• Peer Reviewed: Peer Reviewed
• Volume: 8
• Issue: 8
• Pages: 7593-7597
• DOI: https://doi.org/10.1021/acscatal.8b02026
• Keywords: heterogeneous catalysis, photocatalysis, Ullmann reaction, C−C cross-coupling, two-color reactions, palladium catalyst, titanium dioxide
• Public URL: https://nottingham-repository.worktribe.com/output/4442784
• Publisher URL: https://pubs.acs.org/doi/10.1021/acscatal.8b02026
• Additional Information: ACS Catal. 2018, 8, 8, 7593–7597; Publication Date:July 19, 2018; https://doi.org/10.1021/acscatal.8b02026 /> Copyright © 2018 American Chemical Society