Synthesis of Liquid Crystalline Phophazenes Containing Chiral Mesogens

摘要

Phosphazene cyclic trimers and high polymers containing biphenyl side groups with(S)-2-methyl-l-butoxy as a terminal unit were synthesized. The chiral biphenyl units were linked to the skeletal phosphorus atoms of the small molecule phosphazene cyclic trimers and high polymers through spacer linkages. Single substituent high polymeric poly(organophosphazenes) were synthesized that contained the chiral biphenyl unit linked to the backbone through spacer units. Cosubstituent polymers were also synthesized which contained both the chiral biphenyl derivative linked to the backbone through varying spacer lengths and through non-mesogenic cosubstituents. All the polymers synthesized showed enantiotropic liquid crystallinity. jg.