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

Abstract

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.