Interfacial assembly of a series of trigonal Schiff base amphiphiles in organized molecular films

摘要

A new series of trigonal Schiff base amphiphiles with symmetric aromatic cores, different substituted headgroups were designed, their interfacial assemblies were investigated. When on the metal ions subphases, an in situ coordination can occur for all compounds. The coordinated films could be transferred onto solid substrates, subsequently characterized by various spectroscopic methods such as UV-vis, Fourier infrared spectra as well as the morphological characterization with atomic force microscopy measurement. In addition, on acidic or alkaline subphases with different pH values, the interfacial behaviors, morphologies changed obviously due to the dissociation of the phenol group at alkaline subphase, protonation of the azomethine at strong acidic subphase. Depending on the trigonal molecular structures, different substituted headgroups, these amphiphiles showed distinct assembly behaviors in the organized molecular films. At the same time, a rational explanation about the influence of molecular structures, headgroups on regulating the assembly behaviors was proposed.