The synthesis of a new palladium-azo complex of carbosilane dendrimer of the first generation (G1Pd) was described. Twelve 4-nitroazobenzene groups were used as fragments and attached on its periphery. Azobenzene groups of carbosilane dendrimer underwent ortho-metallation by reaction with PdCl₄^2＋ giving palladium(II)-azo complex. The structure and liquid crystallinity (LC) of G1Pd were characterized by elemental analysis, ¹H NMR, ¹³C NMR, IR, UV-vis, energy-dispersion X-ray analysis (EDXRA), polarizing optical micrography, DSC and WAXD. The phase behavior of G1Pd in LC state is K122ch189I166ch90K. An LC dendrimer having novel structure characteristic was given, which has metal coordination bond and mesomorphic moiety. The high-strength disclination was first observed from cholesteryl LC state and dendritic complexes of liquid crystal and LC polymers.

Key words: high-strength disclination, palladium-azo complex, cholesteryl liquid crystal, dendritic polymeric complex