Polarity of liquid mixtures with components of limited miscibility

Binary mixtures of organic solvents with limited miscibility are investigated by a two parameter equation which reliably describes the polarity of mixtures as a function of their composition. A relation is found between limited miscibility and critical change of solvent structure

Dyes with high dielectric constants

The dielectric constants of perylene dyes, perylene-3,4: 9,10-tetracarboxylic bisimides, are reported. With aromatic substituents, dielectric constants up to 110 are obtained. With polymeric dyes, the dielectric constants rise to 260. Mechanisms and applications are discussed

Erasable Optical Fluorescent Data Storage (EOFS)

A novel principle for optical storage is described which is based on organic fluorescent dyes. The information carrier is the lattice of molecular crystals and the information is read out by solid state fluorescence. The information can be erased by a specific crystal transformation

The polarity of solutions of electrolytes

The polarity of solutions of LiClO4 in acetic acid has been investigated. However, polarity scales based on light absorption, e.g. the π*1-scale, are interfered by aggregation phenomena of the used solvatochromic dyes, whereas solvatochromic fluorescent dyes give proper results

Molecular Devices. Chiral, Bichromophoric Silicones

The interaction of chromophores is proposed as a basis for the construction of devices with high complexity. Silicones are promising elements of structure to control the function of such devices

Spectroscopic studies of fluorescent perylene dyes

The lowest electronic transition of the fluorescent perylene dye bis-(3,5-di-tertbutylphenyl)-perylene-3, 4:9,10-biscarboximide has been investigated