New mesogenic heteropolynuclear complexes of Cu(II), Pd(II), Ni(II) and VO(IV) with the ferrocenophane-containing Schiff's base, and Cu(II) and Pd(II) complexes with the ferrocenophane-containing β-aminovinylketone have been synthesised. The obtained heterometallic mesogenes are identified by elemental analysis, proton nuclear magnetic resonance, infrared and ultraviolet-visible spectroscopies. Liquid crystalline properties are studied by thermal polarising optical microscopy and differential scanning calorimetry techniques. Both ligands and heteropolynuclear complexes exhibit thermotropic nematic and smectic C mesophases in various temperature ranges except for the Ni(II) complex. Mesomorphism of the prepared complexes is correlated with the geometry of their central chelate core. Considerably broader mesophases and lower transition temperatures are achieved in the synthesised metallomesogens by using the alkylidene-bridged ferrocene as a building unit.
Bibliographical noteFunding Information:
This work has been supported by the program Brain Korea 21 (BK-21) and the Centre for Bioactive Molecular Hybrids (KOSEP). ONK is grateful to Professor Yuri Galyametdinov and Professor Willy Friedrichsen for initiating this work.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics