Rodlike metallomesogens containing nickel(<scp>ii</scp>), palladium(<scp>ii</scp>) and copper(<scp>ii</scp>) based on novel enaminoketonato ligands
作者:Carsten P. Roll、Alexander G. Martin、Helmar Görls、Guido Leibeling、Daniel Guillon、Bertrand Donnio、Wolfgang Weigand
DOI:10.1039/b316731c
日期:——
Several new enaminoketone mesogens were synthesized and coordinated to various metal salts to yield a variety of novel rodlike metal-containing liquid crystals. The mesophases were characterized by polarized optical microscopy (POM), differential scanning calorimetry (DSC) and small-angle X-ray scattering (SAXS). Whereas the free ligands display SmA and nematic mesophases, the NiII and PdII complexes give rise to SmC and nematic phases, and the paramagnetic CuII mesogens to a narrow temperature-range nematic mesophase only. The magnetic behaviour of the latter was studied by means of EPR and magnetic susceptibility (SQUID) measurements.