Achieving Highly Robust Polymeric Microspheres with Efficient and Full-Color Organic Afterglow for 3D Printing and Anti-Counterfeiting.

ABSTRACT: In this work, highly robust polymer-based luminescent microspheres with efficient and full-color organic afterglow are developed for the first time. N-phenylnaphthalen-1-amine, N-phenylphenanthren-9-amine, and N-phenyltriphenylen-2-amine are employed as guest luminogens and embedded into melamine-formaldehyde polymer matrices with compact and permanent three-dimensional (3D) covalent networks via host-guest doping and emulsion polymerization. The resulting polymeric microspheres, with a diameter of ≈2 µm, show blue to yellow-green organic afterglow at room temperature. Excitingly, their phosphorescence quantum yields and lifetimes are up to 18.0% and 1.39 s, respectively, representing a breakthrough in comprehensive organic afterglow performance for polymer-based luminescent microspheres.

SUBMITTER: Hu P 

PROVIDER: S-EPMC12561192 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature