New luminescent Ru(II) complexes containing a dangling amine group, Ru(bpy)2(dien)2+ and Ru(bpy)2(entn)2+

Ruthenium(II) carbonyl complexes of dehydroacetic acid thiosemicarbazone: Synthesis, structure, light emission and biological activity

“…p * (imine) MLCT transitions and similar MLCT observed in ruthenium(II) bipyridyl complexes [50]. The present result shows that the Ru(II) carbonyl Schiff base complexes have decreased emission intensity when compared to ruthenium bipyridyl complexes [51]. Among triphenylphosphine and triphenylarsine complexes, the emission maxima is reduced in the arsine complex where the heavier atom As induces the spin forbidden transition [30].…”

Ruthenium(II) mediated C–H activation of substituted acetophenone thiosemicarbazones: Synthesis, structural characterization, luminescence and electrochemical properties

“…In particular the photophysical and the excited state chemistry of Ru(II) diimine complexes has been extensively studied [34][35][36]. The complex, [Ru(bpy) 3 ] 2+ has been studied in great detail and is one of the most used sensitizers in research laboratories due to the very favourable photochemical, photophysical and redox properties [37]. In comparison to the photophysical properties of polypyridyl complexes, the luminescent chemistry of cyclometalated ruthenium carbonyl thiosemicarbazone complexes are not well developed.…”

Synthesis, Characterization, and DNA‐Binding Properties of the Ruthenium(II) Complexes [Ru(dipn)(dptp)](ClO4)2 and [Ru(dipn)(pat)](ClO4)2 (dipn=N‐(3‐Aminpropyl)propane‐1,3‐diamine; dptp=2‐(5,6‐Diphenyl‐1,2,4‐triazin‐3‐yl)‐1,10‐phenanthroline; pat=9‐(1,10‐Phenanthrolin‐2‐yl)acenaphtho[1,2‐e][1,2,4]triazine)

“…At the [21]; this can be attributed to the smaller electron-donor capacity of dptp and pat in comparison with that of dipn, thus reducing the electron density at the Ru II center, which hampers the oxidation of Ru II to Ru III . By comparison with similar complexes [21] [25] [26], the reduction potentials of 1 and 2 can be rationally attributed to the ligand-based reductions L 0/À1 and L À1/À2 (L dptp, pat).…”

“…The absorption spectra of 1 and 2 are characterized by an intense MLCT transition in the VIS region, and a pÀp* ligand transition in the UV region; concurrently, the maxima of the MLCT bands of 1 and 2 are significantly shifted to lower energies in comparison with those of [Ru(dptp) 2 ] 2 and [Ru(pat) 2 ] 2 . It is well documented in the literature that the energy of the MLCT transitions of Ru II complexes are influenced by the p-back bonding of ligands [26]. Upon replacing one aromatic ligand with an amine chelate, the back bonding will decrease and the ligandfield splitting will be smaller, thus the MLCT transitions will shift to higher wavelength.…”