Ruthenium-Cyclopentadienyl-Cycloparaphenylene Complexes: Sizable Multicharged Cations Exhibiting High DNA-Binding Affinity and Remarkable Cytotoxicity.

Two novel sizable multicharged cationic complexes, of the formulae [(--[12]CPP)[Ru(--Cp)]]Χ and [(--[11]CPP)[Ru(--Cp)]]Χ, CPP = cycloparaphenylene, Cp = cyclopentadienyl, X = [PF], (), () and [Cl], (), (), were synthesized and characterized using NMR techniques, high-resolution mass spectrometry, and elemental analyses. Complexes () and () were stable in acetone and acetonitrile solutions over 48 h. In contrast, the water-soluble () and () begin to decompose in aqueous media after 1 h, due to the [Cl] tendency for nucleophilic attack on ruthenium of the {Ru(--Cp)} units.

Dual-Emissive Rectangular Supramolecular Pt(II)--Biphenyl with 4,4'-Bipyridine Derivative Metallacycles: Stepwise Synthesis and Photophysical Properties.

Mixed-ligand tetranuclear supramolecular coordination complexes (SCCs) of Pt(II)--biphenyl and bridging ligands derivatives of 4,4'-bypiridine ()-(), were synthesized and characterized. The SCCs were synthesized stepwise, starting from the Pt--biphenyl -Pt core. The crystal structure of complex {[Pt(2,2'-bpy)](-bph)(-(4,4'-bpy)}{PF} (2,2'-bpy = 2,2'-bipyridine, bph = -biphenyl and 4,4'-bpy = 4,4' bipyridine), was determined using single-crystal diffraction methods.