Boron clusters in liquid crystals

3-Dimensional aromatic moiety was used for the first time in the synthesis of liquid crystals. Several of the prepared compounds, based on sigma-aromatic boron clusters 1 and 2, show only nematic mesophases with relatively high T-i, good electrochemical but limited thermal stability. Absorption and emission spectra of pyridine derivative 15 are reported. Semiempirical methods were employed in evaluation of molecular properties and design of molecules with large coaxial dipole moments.