Synthesis, Characterization and Photophysical Properties of Mixed Ligand (<i>η</i><sup>3</sup>-Allyl)palladium(II) Complexes with N,N’Aromatic Diimines
Antonia Garypidou,
Konstantinos Ypsilantis,
Evaggelia Sifnaiou,
Maria Manthou,
Dimitris Thomos,
John C. Plakatouras,
Theodoros Tsolis,
Achilleas Garoufis
Affiliations
Antonia Garypidou
Department of Chemistry, University of Ioannina, GR-45110 Ioannina, Greece
Konstantinos Ypsilantis
Department of Chemistry, University of Ioannina, GR-45110 Ioannina, Greece
Evaggelia Sifnaiou
Department of Chemistry, University of Ioannina, GR-45110 Ioannina, Greece
Maria Manthou
Department of Chemistry, University of Ioannina, GR-45110 Ioannina, Greece
Dimitris Thomos
Department of Chemistry, University of Ioannina, GR-45110 Ioannina, Greece
John C. Plakatouras
Department of Chemistry, University of Ioannina, GR-45110 Ioannina, Greece
Theodoros Tsolis
Department of Chemistry, University of Ioannina, GR-45110 Ioannina, Greece
Achilleas Garoufis
Department of Chemistry, University of Ioannina, GR-45110 Ioannina, Greece
Palladium(II) complexes of the general formula [Pd(η3-C3H5)(L)](PF6), where L is 4,7-diphenyl-1,10-phenanthroline (1), 2,9-dimethyl-1,10-phenanthroline (2), 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (3), 5-methyl-1,10-phenanthroline (4), 3,4,7,8-tetramethyl-1,10-phenanthroline (5), and 2-(2′-pyridyl) quinoxaline (6), were synthesized and characterized using high-resolution ESI-MS, NMR techniques and, in the case of (6), single-crystal X-ray diffraction methods. In addition, their photophysical properties were investigated. Complexes (1)–(6) were emitted in the greenish-blue region, with those containing methyl-substituted phenanthrolines having the higher quantum yield (≈14%) in the solid state.
