TRANSITION-METALS COMPLEXED TO ORDERED MESOPHASES - SYNTHESIS AND MESOMORPHIC PROPERTIES OF A HOMOLOGOUS SERIES OF N-(4-DODECYLOXYSALICYLIDENE)-4'-ALKYLANILINES COMPLEXED TO PALLADIUM(II)
M. Ghedini et al., TRANSITION-METALS COMPLEXED TO ORDERED MESOPHASES - SYNTHESIS AND MESOMORPHIC PROPERTIES OF A HOMOLOGOUS SERIES OF N-(4-DODECYLOXYSALICYLIDENE)-4'-ALKYLANILINES COMPLEXED TO PALLADIUM(II), Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 250, 1994, pp. 323-332
The new [N-(4-dodecyloxysalicylidene)4'-CnH2n+1-aniline] palladium (II
) derivatives, (R(n)L)(2)Pd, (1-6: n = 1-4,6,8 respectively) have been
synthetized and their mesomorphic properties investigated by optical
microscopy, DSC and X-ray diffraction measurements. Complexes 1-6, but
4, display a monotropic (1,5) or enantiotropic (2,3,6) smectic A meso
phase. In 1-6 the geometry of the metal coordination sphere is square
planar and with reference to homologous (R(n)L)(2)M compounds the meso
morphism of 1-6 appears at temperatures higher than for (R(n)L)(2)VO (
distorted square pyramidal) or (R(n)L)(2)Cu (distorted square planar).