52766-37-7Relevant articles and documents
Double-helix pattern in a model compound of non-linear optical polymers1
Centore, Roberto,Carella, Antonio,Pugliese, Andrea,Sirigu, Augusto,Tuzi, Angela
, p. o531-o533 (2006)
Molecules of the title compound, 3,3'-[4-(4-nitrophenyl-diazenyl) phenylimino]dipropionic acid, C18H18N4O 6 a model compound of second-order non-linear optically active polymers, form helicoidal rows via hydrogen bonding between carboxy groups. Pairs of helices are wrapped around the common axis in a double-helix arrangement unprecedented in dicarboxylic acids. The lateral packing of the helices shows an interdigitated antiparallel arrangement of the chromophore units.