Pseudorotaxane monolayers of pillar[5]arene and linear fatty acids at the air-water interface

Pseudorotaxanes, which are formed by macrocyclic host molecules and linear guest molecules, show potential in molecular devices and surface applications. In this study, ethoxy-functionalized pillar[5]arene (P5A) and amphiphilic linear fatty acid guests were self-assembled into oriented monolayers at the air-water interface. The fatty acid structure dictates the monolayer formation: [2]pseudorotaxane-based, [3]pseudorotaxane-based and phase-separated monolayers. These findings provide insights into P5A-based pseudorotaxane monolayers, facilitating their integration into advanced functional materials.