4,4′‐Distyrylazobenzene as Mesogen From 3,4‐dihydroxybenzaldehyde ( 1 ) the tetraalkoxy‐substituted 4,4′‐distyrylazobenzenes ( E,E,E )‐ 5a – c are synthesized. A similar reaction sequence leads from ethyl 3,4,5‐trihydroxy‐benzoate ( 6 ) to the hexaalkoxy‐substituted 4,4′‐distyrylazobenzenes ( E,E,E )‐ 11 b, c. With the exception of 5a all products show thermotropic LC properties. Smectic phases have been characterized by polarizing microscopy and by differential scanning calorimetry.
No takes yet. Share an insight, caveat, or question.
Kosteyn et al. (1992) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: