Liquid Crystalline Dendrimers: 2. Synthesis of Four Generations of Carbosilane LC Dendrimers with Terminal Methoxyphenylbenzoate Groups. Study of Phase Behaviour Structure and Mobility of mesogenic Groups of LC Dendrimers

摘要

Carbosilane LC dendrimers of generation 1-4 with 8, 16, 32 and 64 terminal phenyl benzoate mesogenic groups were synthesized all LC dendrimers with methoxyphenyl benzoate mesogenic groups of generation first to four the included are crystallized as opposite to the ones with the cyanobiphenyl groups. Small angle X-ray scattering (SAXS) of LC dendrimers with cyanobiphenyl groups of generations first to fourth revealed disordered or thogonol or weakly tilted mesophases (smectics A and C) in this seria of LC dendrimers. Molecular mobility of mesogenic groups in LC dendrimers of first generation with different mesogenic groups were studied by means of electrooptical birefringence method (Kerr effect).