PHOTOINDUCED ELECTRON TRANSFER BETWEEN AMPHIPATHIC RUTHENIUM(II) COMPLEX ANDN,N-DIMETHYLANILINE IN SYNTHETIC BILAYER MEMBRANES AND PHOSPHOLIPID LIPOSOMES

Synthetic control over photoinduced electron transfer in phosphorescence zinc sensors.

Despite the promising photofunctionalities, phosphorescent probes have been examined only to a limited extent, and the molecular features that provide convenient handles for controlling the phosphorescence response have yet to be identified. We synthesized a series of phosphorescence zinc sensors based on a cyclometalated heteroleptic Ir(III) complex. The sensor construct includes two anionic c...

Galactocerebroside-phospholipid interactions in bilayer membranes.

Differential scanning calorimetry (DSC) and x-ray diffraction have been used to study the interaction of hydrated N-palmitoylgalactosylsphingosine (NPGS) and dipalmitoylphosphatidylcholine (DPPC). For mixtures containing less than 23 mol% NPGS, complete miscibility of NPGS into hydrated DPPC bilayers is observed in both the bilayer gel and liquid-crystal phases. X-ray diffraction data demonstra...

Nonequilibrium photoinduced electron transfer

Photoinduced electron transfer between metal-coordinated cyclodextrin assemblies and viologens.

Two novel tris(bipyridine)ruthenium(II) complexes bearing two and six beta-cyclodextrin binding sites on their ligands have been synthesised and characterised. Complex 1, bearing two cyclodextrins, adopts a conformation in aqueous solution where parts of the aromatic ligands are self-included into the cyclodextrin moieties. This results in a loss of symmetry of the complex and gives rise to a m...

Photoinduced electron transfer between ruthenium complexes and nucleotides or DNA

The quenching of the luminescence of Ru(TAP)++, Ru(HAT)z(bpyp+ (TAP = 1,4,5$-tetraazaphenanthrene; HAT = 1,4,5,8,9,12-hexaazatphenylene; bpy = 2,2'bipyridyl) and related oxidising complexes by DNA, polynucleotides, and purine nucleotides occurs by reductive electron transfer. Laser flash photolysis provides evidence for the formation of the reduced metal complex and the deprotonated nucleotide ...