Synthesis and Investigation of Triphenylene Discotic Derivatives with Donor and Acceptor Groups and with Predictable Type of Mesomorphism

摘要

Prognosis of columnar mesomorphism is performed,five new hexa- and hepta-substituted triphenylene derivatives with donor and acceptor groups are synthesized and their mesomorphoc properties are stusied.Good agreement is achieved between predictions and experiments.The synthesized triphenylene derivatives are found to display enantiotropic columnar mesomorphism.1-Amino-2,3,6,7,10,11-hexaheptyl-oxytriphenylene anilides of 2,3,5-triiodo-,3,4,5-trihydroxy- and 4-nitro-benzoic acids reveal enantiotropic dimesomorphism.Also found decrease in thermal stability and extension of the interval of existence of mesophase at introduction to triphenylene frame of substituents with acceptor groups at the amino group.