TY - JOUR
T1 - Crystal structures of 2,3,6,7,10,11-oxytriphenylenes. Implications for columnar discotic mesophases
AU - Andresen, T.L.
AU - Krebs, Frederik C
AU - Thorup, Niels
AU - Bechgaard, K.
PY - 2000/8
Y1 - 2000/8
N2 - The structures of the oxysubstituted triphenylene premesogens, 2,3,6,7,10,11-hexahydroxy-triphenylene (4), 2,3,6,7,10,11-hexamethoxytriphenylene (5), 2,3,6,7,10,11-hexaethoxytriphenylene (6), and 2,3,6,7,10,11-hexapropoxytriphenylene (7) were determined, and the structural results were investigated in the aim that a detailed structural knowledge of the discotic premesogens could be used to infer detailed structural knowledge with respect to known liquid crystal mesogens where little detailed structural knowledge is available. It was found that the crystal structures of the discotic premesogens were very different from the structures expected for discotic columnar behavior. These differences allowed us to shed some light on the structural forces that gives rise to the mesophasic behavior observed in such systems as being not due to stacking of the planar aromatic core as inferred hitherto but rather governed by the alkyl groups.
AB - The structures of the oxysubstituted triphenylene premesogens, 2,3,6,7,10,11-hexahydroxy-triphenylene (4), 2,3,6,7,10,11-hexamethoxytriphenylene (5), 2,3,6,7,10,11-hexaethoxytriphenylene (6), and 2,3,6,7,10,11-hexapropoxytriphenylene (7) were determined, and the structural results were investigated in the aim that a detailed structural knowledge of the discotic premesogens could be used to infer detailed structural knowledge with respect to known liquid crystal mesogens where little detailed structural knowledge is available. It was found that the crystal structures of the discotic premesogens were very different from the structures expected for discotic columnar behavior. These differences allowed us to shed some light on the structural forces that gives rise to the mesophasic behavior observed in such systems as being not due to stacking of the planar aromatic core as inferred hitherto but rather governed by the alkyl groups.
KW - Nye funktionelle materialer
U2 - 10.1021/cm0003020
DO - 10.1021/cm0003020
M3 - Journal article
SN - 0897-4756
VL - 12
SP - 2428
EP - 2433
JO - Chemistry of Materials
JF - Chemistry of Materials
IS - 8
ER -