Low molecular weight organogel from the cubic mesogens containing dihydrazide group

✍ Scribed by Hong Xin; Xiaoming Zhou; Chengxiao Zhao; Haitao Wang; Min Lib

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 794 KB
• Volume: 160
• Category: Article
• ISSN: 0167-7322
• DOI: 10.1016/j.molliq.2011.02.002

✦ Synopsis

The mesomorphic dihydrazide derivatives N,N′-bis(4-n-alkyloxybenzoyl) hydrazine (Cn) showed stable liquid crystalline properties and strong gelation ability in organic solvents, and showed environmentally tuned self-assembled structures. On heating, Cn (n = 7, 12, 16) exhibit thermotropic cubic phase with Pn3m symmetry; while in the gel phase, molecules of Cn self-assembled into higher ordered monolayer structure, which is the fundamental of the fibrous aggregates observed by SEM. Intermolecular hydrogen bonding between the dihydrazide groups was demonstrated to be the major driving force for both gelation of organic solvents and stabilization of the liquid crystalline phase.