Amorphous‐to‐Crystalline Transformation with Fluorescence Enhancement and Switching of Molecular Nanoparticles Fixed in a Polymer Thin Film

Abstract

Growth in a confined environment: A protocol for the amorphous-to-crystalline transformation (ACT) of nanoparticles has been developed, the critical step being the partial confinement of the particles by fixing in a polymer thin film and solvent vapor fuming. The ACT of a diaminodicyanoquinodimethane-based nanoparticle is accompanied by substantial fluorescence enhancement and switching of the emission color.