Tuning Co-Operative Energy Transfer in Copper(I) Complexes Using Two-Photon Absorbing Diimine-Based Ligand Sensitizers

Noémie Beaucage; Zujhar Singh; Jérémie Bourdon; Shawn K Collins

doi:10.1002/anie.202412606

Tuning Co-Operative Energy Transfer in Copper(I) Complexes Using Two-Photon Absorbing Diimine-Based Ligand Sensitizers

Angew Chem Int Ed Engl. 2024 Sep 18:e202412606. doi: 10.1002/anie.202412606. Online ahead of print.

Authors

Noémie Beaucage¹, Zujhar Singh¹, Jérémie Bourdon¹, Shawn K Collins¹

Affiliation

¹ Noémie Beaucage, Dr. Zujhar Singh, Jérémie Bourdon and Prof. Dr. Shawn K. Collins, Department of Chemistry and Centre for Green Chemistry and Catalysis, Université de Montréal, 1375 Avenue Thérèse-Lavoie-Roux, Montréal.

PMID: 39292148
DOI: 10.1002/anie.202412606

Abstract

Photocatalysis mediated by low energy light wavelengths has potential to enable safer, sustainable synthetic methods. A phenanthroline-derived ligand bathocupSani, with a large two-photon absorption (TPA) cross section was used to construct a heteroleptic complex [Cu(bathocupSani)(DPEPhos)]BF₄ and a homoleptic complex [Cu(bathocupSani)₂]BF₄. The ligand and the respective homoleptic complex with copper exhibit two-photon upconversion with an anti-Stokes shift of 1.2 eV using red light. The complex [Cu(bathocupSani)₂]BF₄ promoted energy transfer photocatalysis enabling oxidative dimerization of benzylic amines, sulfide oxidation, phosphine oxidation, boronic acid oxidation and atom-transfer radical addition.

Keywords: copper; energy transfer; photocatalysis; red light; two photon absoprtion.

Abstract

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