Aggregation behavior of glutamine-cyanostyrene-based composite Langmuir-Blodgett films and their chiral and optoelectronic properties

Abstract

Self-assembly of chiral molecules combining multifunctional thin film materials has been increasingly emphasized by researchers. In this work, amphiphilic glutamine-cyanostilbene-based molecules organic molecules and dye molecules composite LB films were designed and prepared by supramolecular self-assembly in LB technology. Characterization by AFM and transmission electron microscopy confirmed that the composite films exhibit nanoscale surface homogeneity. UV spectroscopy and circular dichroism spectroscopy analyses show that the prepared LB films have J-type aggregation state and the chiral centers achieve effective chiral transfer during supramolecular assembly. Photoelectrochemical tests show that all the film properties exhibit excellent photocurrent density and charge separation efficiency, which provides a theoretical model for the design of flexible optoelectronic devices and an idea for the application of chiral supramolecular materials in the field of optoelectronic sensing and energy conversion.