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Photocatalytic H₂ production by dirhodium(ii,ii) photosensitizers with red light
- Sayre, Hannah J., Millet, Agustin, Dunbar, Kim R., Turro, Claudia
- Chemical communications 2018 v.54 no.60 pp. 8332-8334
- catalysts, chemical compounds, hydrogen, hydrogen production, irradiation, nanoparticles, photocatalysis, photosensitizing agents, red light
- Photocatalytic proton reduction to generate H₂ was achieved with the photosensitizers Rh₂(DTolF)₂(npCOO)₂ (DTolF = p-ditolylformamidinate; npCOO⁻ = 2-carboxylate-1,8-naphthyridine; 1) and [Rh₂(DTolF)₂(qnnp)₂][BF₄]₂ (qnnp = 2-(quinolin-2-yl)-1,8-naphthyridine; 2) using a relay system containing the sacrificial donor BNAH (1-benzyl-1,4-dihydronicotinamide), electron acceptor MV²⁺ (methylviologen), and Pt nanoparticles as the catalyst with 655 nm irradiation. Comparison of the H₂ evolution under similar experimental conditions show comparable activity of the Rh₂(ii,ii) complexes (λᵢᵣᵣ = 655 nm) to that of the prototypical [Ru(bpy)₃]²⁺ (bpy = 2,2′-bipyridine; 3) with λᵢᵣᵣ = 447 nm. This work demonstrates the ability of the new panchromatic Rh₂(ii,ii) complexes to achieve photocatalysis with red light.