The effect of aliphatic chain length on the self-assembly of wedge-shaped cesium 3,4,5-tris(alkyloxy)benzenesulfonates

Abstract

Wedge-shaped dendrons based on benzenesulfonic acid form a variaty of liquid crystal mesophases such as ordered and disordered columnar hexagonal, micellar cubic Pm3n etc. Among the factors affecting phase behavior...

Sequence-Isomerism-Controlled Macromolecular Self-Assembly in Dendritic Rod-Like Molecules

“…For 3OH-3OF 2 C1C6 , the longer side chains can provide enough entropy to reach equilibrium at a lower temperature than 3OH-3OF 2 C1C1 , and as the temperature increases, the side chain undergoes entropy-driven lateral expansion, leading to a change in the order−disorder transition. 44,45 However, for 3OH-3OF 2 C1C1 , since the segmental side chains provide limited conformational entropy, higher temperatures are required to reach equilibrium with the driving force and form a stable columnar structure. In 3OH-3OF 2…”

“…For the two molecules of fan-like shape, the entropy provided by the OF 2 rods is essentially similar, while the major difference lies in the entropy provided by the side chains. For 3OH-3OF 2 C1C6 , the longer side chains can provide enough entropy to reach equilibrium at a lower temperature than 3OH-3OF 2 C1C1 , and as the temperature increases, the side chain undergoes entropy-driven lateral expansion, leading to a change in the order–disorder transition. , However, for 3OH-3OF 2 C1C1 , since the segmental side chains provide limited conformational entropy, higher temperatures are required to reach equilibrium with the driving force and form a stable columnar structure. In 3OH-3OF 2 C1C1 , the rigid structure with methyl side chains provides limited conformation changes and thermal expansion, which introduces a higher T ODT in the HEX phase.…”