PARAMAGNETIC CHIRAL MESOPHASES OF SHIFF BASE COMPLEXES OF TRANSITION-METALS

Copper(II), nickel(II) and oxovanadium(IV) complexes of oxybenzoyloxy) -N-(S)-2-methylbutylsalicylaldimine, as well as the parent ligand, wer e studied by optical and DSC methods. For the first two complexes, the re exist between a tightly twisted chiral nematic phase and the isotro pic liquid either some blue phases or novel-type amorphous phases, wit h their temperature ranges depending significantly on the metal centre . For the third complex, direct isotropization takes place.