INTERPLAY OF CONDUCTIVITY, MAGNETISM (AND NONLINEAR OPTICS) IN ORGANIC-INORGANIC COMPOUNDS

The preparation and characterization of organic-inorganic molecule-bas ed systems in which conduction electrons coexist with localized moment s is reported. These systems comprise (i) charge transfer salts of org anic donors, such as BETS (bis(ethylenedithio)tetraselena-fulvalene an d paramagnetic inorganic anions, such as [MX4](-), [M2X6](2-) with M = Fe, Cu, etc., and X = Cl, Br, etc., or (ii) charge transfer salts of inorganic acceptor bisdithiolato metal complexes, such as M(dmit)(2) ( dmit(2-) = 2-thioxo-1,3-dithiole-4,5-dithiolato), and paramagnetic org anometallic cations, such as [MCp2](n+) (Cp = cyclopentadienyl-like li gands). In some favorable cases, such as lambda-(BETS)(2)(FeCl4), new experimental evidence for interaction between the conduction electrons (of BETS) and magnetic moments (localized on [FeCl4](-)) is discussed . Current research towards the coupling of electrical and nonlinear op tical properties in molecule-based compounds is reported. Additional e vidence for the oxidation-induced symmetry breakdown in [bis-TTF](+) r adical cations is given.