Oa. Turanova et al., Synthesis and liquid-crystalline properties of substituted beta-aminovinylketones and their complexes with copper(II), RUSS CHEM B, 50(5), 2001, pp. 805-808
Mesogenic complexes were synthesized by the reaction of beta -aminovinyl ke
tones with copper(II) acetate. On going from the ligands to complexes, the
temperature of phase transitions increases and the nematic phase disappears
. The initial members of the homological 1-(4-nonyloxyphenyl)-3-(4-methoxyp
henylamino)-1-propen-1-one series demonstrate the alternation of clearing t
emperatures, which is absent for the corresponding copper(II) complexes.