Self-Propelled Motion Sensitive to the Chemical Structure of Amphiphilic Molecular Layer on an Aqueous Phase
Two novel amphiphiles, <i>N</i>-(3-nitrophenyl)stearamide (MANA) and <i>N</i>,<i>N′</i>-(4-nitro-1,3-phenylene)distearamide (OPANA), were synthesized by reacting nitroanilines with one or two equivalents of stearic acid. We investigated how the molecular structure...
Guardado en:
| Autores principales: | , , |
|---|---|
| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
|
| Materias: | |
| Acceso en línea: | https://doaj.org/article/f60e0910fc2b4b839474425e9fb403e8 |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| Sumario: | Two novel amphiphiles, <i>N</i>-(3-nitrophenyl)stearamide (MANA) and <i>N</i>,<i>N′</i>-(4-nitro-1,3-phenylene)distearamide (OPANA), were synthesized by reacting nitroanilines with one or two equivalents of stearic acid. We investigated how the molecular structures of these compounds influenced the characteristics of a self-propelled camphor disk placed on a monolayer of the synthesized amphiphiles. Three types of motion were observed at different surface pressures (<i>Π</i>): continuous motion (<i>Π</i> < 4 mN m<sup>−1</sup>), deceleration (4 mN ≤ <i>Π</i> ≤ 20 mN m<sup>−1</sup>), and no motion (<i>Π</i> > 20 mN m<sup>−1</sup>). The speed of the motion of the camphor disks was inversely related to <i>Π</i> for both MANA and OPANA at the temperatures tested, when <i>Π</i> increased in the respective molecular layers under compression. The spectroscopic evidence from UV-Vis, NMR, and ESI-TOF-MS revealed that the dependence of the speed of the motion on <i>Π</i> originates from the intermolecular interactions that are present in the monolayers. This study suggests that it is possible to control the self-propelled motion by manipulating contributing factors at the molecular level. |
|---|