A. Ferencz et al., POLYMERIC HEMIPORPHYRAZINES, A NEW CLASS OF RODLIKE MACROMOLECULES SUITABLE FOR THE LANGMUIR-BLODGETT TECHNIQUE, Angewandte Chemie, International Edition in English, 32(8), 1993, pp. 1184-1187
Out of the square form of the alkoxy-substituted hemiporphyrazinatoger
manoxane 1 (R1 = CH3, R2 = C8H17) a new molecular architecture arises.
The previously known rodlike molecules used for the LB technique all
possess cylindrical symmetry.