An efficient synthesis of liquid crystalline gigantocycles combining banana-shaped and rod-like mesogenic units.
The synthesis of monodisperse gigantocycles with 63, 87, and 147 ring atoms on the gram scale is described. These molecules were assembled from terphenylene derivatives and long, flexible chains which were mainly aliphatic, with terminal alkyne groups. The latter allowed for ring formation through oxidative alkyne dimerization in high yield (80-87%). The combination of a rod-like and a banana-shaped mesogen connected by flexible chains within the backbone of a ring gives rise to nematic and smectic mesophases.
Godt
Adelheid
A
Max-Planck-Institut für Polymerforschung Ackermannweg 10, 55128 Mainz, Germany. godt@mpip-mainz.mpg.de
Duda
Stefan
S
Unsal
Omer
O
Thiel
Jürgen
J
Härter
Alice
A
Roos
Mark
M
Tschierske
Carsten
C
Diele
Siegmar
S