Conformationally gated photoinduced processes within photosensitizer–acceptor dyads based on ruthenium(II) and osmium(II) polypyridyl complexes with an appended pyridinium group

Synthesis, characterization and photophysical properties of quinolin-8-olato chelated osmium(II) organometallics bearing a pendant imine-phenol motif and electrogeneration of trivalent analogue

“…It was also reported in the literature that a series of compounds derived from 8-hydroxyquinoline showed that they could possess strong antifungal, antiasthmatic and antiplatelet activity [10][11][12][13]. In particular the chemistry of osmium compounds is of current interest in the context of synthesis, reactivity and photophysical properties [1,9,[14][15][16].…”

“…The chemistry of osmium has been receiving considerable attention largely because of the variety of reactivities and due to the fascinating electron transfer properties exhibited by complexes of this metal [1][2][3][4][5][6][7][8][9]. Variation of the coordination environment around osmium plays a key role in modulating the redox properties of its complexes.…”

Inductive properties of polypyridyl ruthenium complexes significantly regulate various protein distributions in Escherichia coli

“…The Ru-DNA adduct has been demonstrated to terminate DNA elongation by polymerases in PCR [17]. The cytotoxicity of polypyridyl chlororuthenium complexes has been studied in murine and human tumor cells in vitro, and many bipyridine and terpyridine ligands have been synthesized and reported in the literature [18,19]. Therefore, polypyridyl ruthenium complexes are easily available for a systematic model in which to study the relationships between structure and biorelated reactivity.…”

Photoluminescence electron transfer quenching of ruthenium(II)-polypyridyl complexes with biologically important phenolate ions in aqueous acetonitrile solution

“…Ruthenium polypyridyl complexes, such as [Ru(bpy) 3 ] 2+ (bpy = 2,2′-bipyridine), are among the most investigated in fields that include solar energy conversion [19,20], artificial photosynthesis [21], optical sensing [22,23], and luminescent probes for characterizing microheterogeneous environments, owing to their favorable photophysical properties, excited state reactivity, and chemical stability [24,25]. The excited state properties like emission lifetime, quantum yield, wavelength of emission maximum and redox potential of [Ru(bpy) 3 ] 2+ are largely affected by the introduction of electron-donating and electron-withdrawing groups in the 4,4′-position of 2,2′-bipyridine [26].…”