title: Effect of pH in the photoluminescence of a ruthenium complex featuring a derivative of the ligand pyrazine[2,3-f][1,10]-phenanthroline.
abstract: A new ruthenium complex, [Ru(bpy)2(dbe-ppl)](PF6)2 (bpy=2,2'-bipyridine and dbe-ppl=dimethyl 4,4'-(pyrazino[2,3-f][1,10]phenanthroline-2,3-diyl)dibenzoate, has been synthesized and characterized by (1)H NMR spectroscopy, UV-Vis, IR, and cyclic voltammetry. Irradiation on the MLCT band results in photoluminescence in both protic and aprotic solvents. The photoluminescence in water is pH dependent, it shows a behavior which can be described by the Henderson-Hasselbalch assuming the protonation/deprotonation of the excited state with a pKa of 2.40±0.01.
authors: Departamento de Química, Facultad de Ciencias, Universidad de La Serena, Casilla 599, Benavente 980, La Serena, Chile.
authors: Sebastián
authors: S
authors: Pizarro
authors: Departamento de Química, Facultad de Ciencias, Universidad de La Serena, Casilla 599, Benavente 980, La Serena, Chile.
authors: Miguel
authors: M
authors: Gallardo
authors: Departamento de Química, Facultad de Ciencias, Universidad de La Serena, Casilla 599, Benavente 980, La Serena, Chile.
authors: Constanza
authors: C
authors: Leyton
authors: Departamento de Química, Facultad de Ciencias, Universidad de La Serena, Casilla 599, Benavente 980, La Serena, Chile.
authors: Eileen
authors: E
authors: Castro
authors: Departamento de Química, Facultad de Ciencias, Universidad de La Serena, Casilla 599, Benavente 980, La Serena, Chile.
authors: Francisco
authors: F
authors: Gajardo
authors: Departamento de Química, Facultad de Ciencias, Universidad de La Serena, Casilla 599, Benavente 980, La Serena, Chile. Electronic address: adelgadillo@userena.cl.
authors: Alvaro
authors: A
authors: Delgadillo
mesh_terms: D006863:Hydrogen-Ion Concentration; D008163:Luminescent Measurements; D010618:Phenanthrolines / Q000737:chemistry*; D012428:Ruthenium / Q000737:chemistry*
chemical_list: D010618:Phenanthrolines; D012428:Ruthenium
keywords: Excited state; Metal to ligand charge transfer; Photoluminescence; Ru(II) complex