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• W2019990234 abstract "The photoluminescence (PL) and electrogenerated chemiluminescence (ECL) of [H2(MPy3,4DMPP)Ru(bpy)2Cl](PF6), where H2MPy3,4DMPP = meso-tris-3,4-dimethoxyphenyl-mono-(4-pyridyl)porphyrin and bpy = 2,2′-bipyridine, are reported in acetonitrile. The compound has a complex absorbance spectrum with bands characteristic of both the porphyrin and ruthenium moieties. PL emission maxim are observed at 655 nm when excited at the maximum absorption intensity corresponding to the porphyrin Soret π → π∗ band, and around 600 nm when excited at wavelengths corresponding to Ru(dπ)–bpy (π∗) MLCT transition. The photoluminescence efficiency (ϕem) of the 655 nm emission is 0.039 and that of the free porphyrin is 0.69 compared to Ru(bpy)32+ at 0.042. [H2(MPy3,4DMPP)Ru(bpy)2Cl](PF6) displays complex electrochemical behavior, with one electrochemically reversible RuII–RuIII oxidation and two quasi-reversible waves at more cathodic potentials corresponding to the porphyrin moiety. Oxidative ECL was generated using the coreactant tri-n-propylamine (TPrA). ECL efficiencies (ϕecl) were 0.14 for [H2(MPy3,4DMPP)Ru(bpy)2Cl]+ and 0.099 for H2MPy3,4DMPP using Ru(bpy)32+ as the standard (ϕecl = 1). ECL intensity was linear with respect to concentration from 1 to 0.001 μM. The ECL intensity peaks at potentials corresponding to oxidation both the ruthenium and porphyrin moieties as well as TPrA, indicating that multiple pathways for formation of the excited state are possible. However, an ECL spectrum shows a band similar in energy and shape to that of the Soret emission (655 nm for the PL and 656 nm for the ECL, respectively), indicating the same excited state is formed in each experiment." @default.
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• W2019990234 date "2007-04-01" @default.
• W2019990234 modified "2023-10-01" @default.
• W2019990234 title "Photoluminescence and electrogenerated chemiluminescence of a bis(bipyridyl)ruthenium(II)–porphyrin complex" @default.
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• W2019990234 doi "https://doi.org/10.1016/j.ica.2006.08.032" @default.
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