Jajm. Vekemans et al., COPLANARITY BY HYDROGEN-BONDING IN WELL-DEFINED OLIGOHETEROCYCLES, Bulletin des Societes chimiques belges, 105(10-11), 1996, pp. 659-674
(Hetero)aryl-aryl coupling for covalent bonding and intramolecular hyd
rogen bond formation for establishing the secondary structure have bee
n united to design and construct well-defined, functionalized macromol
ecules. The suitability of azaheterocyclic units to realize this conce
pt is exemplified by star shaped discotic liquid crystalline compound
1 and ladder-type conjugated copolymers 2 and 3.