Synthesis of 2,2'-bipyridines : from versatile building blocks to sexy architectures and functional (nano)materials

The latest synthetic strategies to prepare 2,2-bipyridine and its mono-substituted, symmetrical and unsymmetrical 3,3-, 4,4-, 5,5-, and 6,6-disubstituted derivatives are critically discussed and evaluated. Different coupling procedures to achieve new symmetrical and unsymmetrical functionalized 2,2-bipyridines, such as Stille-type, Negishi-type, and Suzuki-type cross-coupling reactions are discussed in detail. Moreover, condensation procedures that allow further variations are presented. The application of functional group transformations for access to additional groups is examined

Triads Containing Terpyridine-Ruthenium(II) Complexes and the Perylene Fluorescent Dye

A perylene unit was modified with two terpyridine moieties. Each terpyridine chelating moiety was subsequently complexed with ruthenium(III) trichloride to yield a dinuclear bis(monoterpyridine-ruthenium(III) chloride)perylene derivative. Alternatively, it is possible to obtain the corresponding perylene derivative bearing two bis-terpyridine-ruthenium(II) complexes via conversion of the of the terpyridine-substituted perylene with [Ru(tpy)Cl3]. The compounds were characterized in detail by MALDI-TOF mass spectrometry, NMR, UV-vis as well as fluorescence spectroscopy

Thermal Stability, Rheology and Morphology of Metallo-Supramolecular Polymers Based on bis-Terpyridine Ruthenium (II) Complexes

Supramolecular polymers, based on poly(ethylene glycol) and terpyridine-ruthenium(II) complexes, were investigated regarding their thermal stability by TGA. In addition, the temperature-dependent melt viscosity was studied using a rheometer and the results were compared to the corresponding classical poly(ethylene glycol). Finally, the morphology of an annealed film was investigated by AFM