Photophysical properties and X-ray crystal structure of a luminescent platinum(II) dimer [Pt₂(2,2′ : 6′,2″-terpyridine)₂(Gua)](CIO₄)₃·H₂O (Gua = guanidine anion)

Abstract

A n e w luminescent d8-d8 dinuclear Ptll polypyridyl complex [Pt2(2,2' : 6',2''-terp~ridine)~(Gua)]3+ is synthesised and characterized by X-ray crystallography; its spectroscopic and photoredox properties are investigated.

Square-Planar Pd(II), Pt(II), and Au(III) Terpyridine Complexes: Their Syntheses, Physical Properties, Supramolecular Constructs, and Biomedical Activities

“…145ridines; further, only weak short-range (distances > 3.88 Å) interactions were observed between Pt metal centers and terpyridine moieties(Figure 56).Single crystal X-ray structures of 138 and 140-146 were reported;35,67,69,[146][147][148][149][150][151][152] however, only complexes 141,149 143,69 and 14567 are depicted in…”

“…Structures of dinuclear 137-148 with short intramolecular distances between metal centers (Pt-Pt and Pd-Pd) and terpyridine moieties 35,67,69,[146][147][148][149][150][151][152][153]. which was attributed to dimer formation of 144 similar to the dark crystal packing.Lowe et al149 prepared a dinuclear complex 149 with a thioacetamine linker, which slowly decomposed in water to form intermediate 150, which abstracted an extra sulfur with a Pt(II) terpyridine moiety of 149 and was converted to a crystalline trinuclear propeller-like complex 151 (Scheme 13).…”

Luminescent Dinuclear Platinum(II) Terpyridine Complexes with a Flexible Bridge and “Sticky Ends”

“…Tunable solution‐state intermolecular Pt⋅⋅⋅Pt interactions and π–π stacking were suggested to be responsible for these remarkable spectroscopic changes upon variations in the solvent composition, counteranion, and pH value of the polyelectrolyte. However, the related intramolecular association or self‐assembly of this class of complexes in solution were not extensively explored 3b–d…”

Reaction of an Osmium(VI) Nitrido Complex with Cyanide: Formation and Reactivity of an Osmium(III) Hydrogen Cyanamide Complex

“…[28] Compounds 7-9 are paramagnetic, with room-temperature magnetic moments of 1.7-1.8 m B (solid sample, Gouy method), consistent with low-spin d 5 osmiumA C H T U N G T R E N N U N G (III) complexes with one unpaired electron. Table 3 Although the Os IV/III reduction potential is insensitive to the R 1 and R 2 groups on the guanidine ligand, the reduction potentials of Os III/II couple of 8 and 9 are 200 mV more cathodic than that of 7 (Figures S15-S16 in the Supporting Information).…”