TY  - JOUR
A1  - Goldmann, Daniela
A1  - Janietz, Dietmar
A1  - Schmidt, C.
A1  - Wendorff, Joachim Heinz
T1  - Columnar liquid crystalline phases through hydrogen bonding and nanoscale segregation
N2  - Two columnar phases forming 2,4,6-triarylamino-1,3,5-triazines have been investigated in binary mixtures with calamitic and non-liquid crystalline benzoic acids carrying one or two alkoxy chains at the aromatic core. The triazines form hydrogen bonded aggregates with the complementary acids. Each investigated equimolar mixture exhibits a columnar mesophase due to segregation of the H-bonded polar core region from the lipophilic aliphatic molecular segments. The cross sectional shape of cylindrical aggregates and, therefore, the two-dimensional lattice symmetries, hexagonal or rectangular, are defined by the number of alkoxy chains of the benzoic acid component
Y1  - 2004
SN  - 0959-9428
ER  - 
TY  - JOUR
A1  - Goldmann, Daniela
A1  - Nordsieck, A.
A1  - Janietz, Dietmar
A1  - Frese, T.
A1  - Schmidt, C.
A1  - Wendorff, Joachim Heinz
T1  - Smectic and columnar liquid crystalline phases through charge-transfer interactions
N2  - New heterocyclic electron donors based on. a 1,3,5-triazine nucleus are presented. Three phenyl rings are grafted to the triazine core either via secondary amino groups or by a direct C,C-linkage and a specific number of decyloxy chains is attached to the molecular periphery. The compounds are non-liquid crystalline in their pure states. Lamellar or columnar mesophases are induced by attractive interactions with electron acceptors
Y1  - 2004
SN  - 1058-725X
ER  -