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Abstract One-photon-absorbing photosensitizers are commonly used in homogeneous photocatalysis which require the absorption of ultraviolet (UV) /visible light to populate the desired excited states with adequate energy and lifetime. Nevertheless, the limited penetration depth and competing absorption by organic substrates of UV/visible light calls upon exploring the utilization of longer-wavelength irradiation, such as near-infrared light (λ irr > 700 nm). Despite being found applications in photodynamic therapy and bioimaging, two-photon absorption (TPA), the simultaneous absorption of two photons by one molecule, has been rarely explored in homogeneous photocatalysis. Herein, we report a group of ruthenium polypyridyl complexes possessing TPA capability that canmore »Free, publicly-accessible full text available December 1, 2023
Free, publicly-accessible full text available April 27, 2023
Free, publicly-accessible full text available March 1, 2023
Two new tris-heteroleptic Ru( ii ) complexes with triphenylphosphine (PPh 3 ) coordination, cis -[Ru(phen) 2 (PPh 3 )(CH 3 CN)] 2+ (1a, phen = 1,10-phenanthroline) and cis -[Ru(biq)(phen)(PPh 3 )(CH 3 CN)] 2+ (2a, biq = 2,2′-biquinoline), were synthesized and characterized for photochemotherapeutic applications. Upon absorption of visible light, 1a exchanges a CH 3 CN ligand for a solvent water molecule. Surprisingly, the steady-state irradiation of 2a followed by electronic absorption and NMR spectroscopies reveals the photosubstitution of the PPh 3 ligand. Phosphine photoinduced ligand exchange with visible light from a Ru( ii ) polypyridyl complex has not previouslymore »Free, publicly-accessible full text available February 16, 2023
Free, publicly-accessible full text available December 20, 2022
Trifluoromethyl substitution enhances photoinduced activity against breast cancer cells but reduces ligand exchange in Ru(
ii) complexA series of five ruthenium complexes containing triphenyl phosphine groups known to enhance both cellular penetration and photoinduced ligand exchange, cis -[Ru(bpy) 2 (P( p -R-Ph) 3 )(CH 3 CN)] 2+ , where bpy = 2,2′-bipyridine and P( p -R-Ph) 3 represent para -substituted triphenylphosphine ligands with R = –OCH 3 (1), –CH 3 (2) –H (3), –F (4), and –CF 3 (5), were synthesized and characterized. The photolysis of 1–5 in water with visible light ( λ irr ≥ 395 nm) results in the substitution of the coordinated acetonitrile with a solvent molecule, generating the corresponding aqua complex asmore »