Preparation method of terphenyl phenanthrene discotic liquid crystal compound

The invention relates to research on a chemical structure, a synthesis method, mesogenic properties and application of a discotic liquid crystal triad compound of 3, 3 '', 6, 6 '', 7, 7 '', 10, 10 '', 11, 11 ''-decaalkoxy-2, 2 ': 7', 2 ''-terphenyl phenanthrene and a preparation method of the discotic liquid crystal triad compound of 3, 3 '', 6, 6 '', 7, 7 '', 10, 10 ', 11, 11' '-decaalkoxy-2, 2': 7 ', 2' '-terphenyl phenanthrene. The compounds are characterized by having the general formula (TTPn). The compound with the general formula (TTPn) can be self-assembled into a liquid crystal intermediate phase in a wide temperature range, and the compound with the general formula (TTPn) is a room-temperature liquid crystal. The invention also provides a preparation method of the discotic liquid crystal triad compound of 3, 3 '', 6, 6'', 7, 7 '', 10, 10'', 11, 11 ''-deca( alkoxy)-2, 2 ': 7', 2 ''-terphenyl phenanthrene, the synthesis route is simple and rapid, the yield is high, and the target compound in the gener