Luminescent, liquid crystalline tris(N-salicylideneaniline)s: Synthesis and characterization

Article abstract of DOI:10.1021/jo9001933

A new class of discotics derived from tris(N-salicylideneaniline)s have been synthesized and their thermal and photophysical properties are investigated. These systems with outer 1,3,4-oxadiazole wings exist in an inseparable mixture of two keto-enamine tautomeric forms with C_3h and C_s rotational symmetries, and self-assemble into fluid columnar phase over a wide thermal range as evidenced by several complementary studies. They possess emissive characteristics in both solution and columnar states; the blue light (λ = 474 nm) emission has been evidenced for the former state.