名称:
Wholly-rigid rod–rod amphiphiles: synthesis, crystal structures, and self-assembling behavior in water
摘要:
A series of fully rigid rod-rod type amphiphilic molecules have been constructed by using 4,4'-bipyridin1-ium or 4,4'-bipyridin-1,1'-diium (viologen) as a hydrophilic segment and phenyl, biphenyl or para-tertphenyl as a hydrophobic unit. The crystal structures of four of the molecules have been elucidated. TEM, SEM, AFM, and DLS experiments revealed that these stiff amphiphiles could self-assemble into diverse architectures, including spherical micelles, ultra-long straight nanofibers (>1 mm), and nanotubes in water, which depend on the hydrophilic/hydrophobic fraction ratios of the molecules. (c) 2014 Elsevier Ltd. All rights reserved.