From the photochemistry of coordination compounds to light-powered nanoscale devices and machines

Synthesis, characterization and photophysics of alkyne bridged bimetallic rhenium(I) and ruthenium(II) complexes

“…Usually, heterobimetallic dyads are based on Ru(II) and Os(II) ions and a plethora of reports are available based on these ions [1,4,7,14]. However, Ru(II) and Re(I) heterobimetallic dyads are relatively less, though few reports are available [31][32][33][34][35].…”

“…In the present study, we describe the synthesis, photophysics and electrochemistry of rigidly bridged bimetallic complexes of ruthenium(II) and rhenium(I). An enormous amount of reports on multimetallic Ru II (bpy) 3 type complexes based on the 2,2 0 -bipyridine ligands as the bridge are available in the literature [1,7]. In this work the bridge is directly attached to the metal center in monodendate fashion and another site is occupied by Cl À ion.…”

“…The d 6 transition metal polypyridyl complexes of Ru(II), Os(II) and Re(I), because of favorable properties inherent on them, usually act as components in the dyad [1,3,7,14]. These metal complexes are highly luminescent and emit from the 3 MLCT state, which has moderate excited state lifetime.…”

“…The design and construction of multicomponent supramolecular systems has drawn much attention to mimic the function of natural photosynthesis and to study directional electron/energy transfer as well as electronic interaction across bridging ligands [4,5]. The tuning and optimization of such basic systems have gained tremendous interest due to the potential application of these supramolecular systems in the field of optical and electronic devices as wires [1,6,7] or switches [8] and in artificial light energy conversion [1,9,10]. It is interesting to go from molecular to supramolecular system, because the latter shows, in addition to the properties inherent of each molecular unit, the properties related to the structure and composition of whole unit [11][12][13].…”

“…The simplest class of supramolecular architecture is a two component system called 'dyad' [1][2][3], in which the two components are connected by a bridge called spacer. The design and construction of multicomponent supramolecular systems has drawn much attention to mimic the function of natural photosynthesis and to study directional electron/energy transfer as well as electronic interaction across bridging ligands [4,5].…”