Intrinsically Chiral Excimers: Water‐Compatible Trityl‐Based Nanoparticles as Tailored Dual Emitters of Circularly Polarized Luminescence in the Vis or NIR Regions (Small 14/2026)

Chiral Excimers In article number (e12627), Imma Ratera, Paula Mayorga-Burrezo, and co-workers present water-compatible chiral organic nanoparticles based on a brominated trityl radical that convert unpolarized light into circularly polarized emission without energy-wasting filters. The luminescence is tunable via radical concentration, yielding chiral emission from monomeric species in the visible region and from intrinsically chiral excimers that extend into the near-infrared, enabling optical and biomedical applications. Image credit: Orfeas E. Plastiras.