What question did this study set out to answer?

To explore how nonconjugated substituents and spirocyclic designs affect the emission of fluorene-based fluorescent organic nanoparticles.

February 12, 2026Chemical Communications0 citationsOpen Access

One Spiro to Shift Them All: Tuning Fluorescent Organic Nanoparticles Emission via Steric Design

EKEleonore Kurek OPOphélie Dal Pra ASAliocha Skrzypczak

Key Points

To explore how nonconjugated substituents and spirocyclic designs affect the emission of fluorene-based fluorescent organic nanoparticles.
Synthesized three quadrupolar fluorene-based dyes with different nonconjugated substituents.
Formed fluorescent organic nanoparticles (dFONs) from these dyes.
Conducted emission spectroscopy to assess changes in fluorescence.
Emission color of dFONs was tunable from blue to yellow.
Use of spirocyclic substituents led to significant red-shifts in emission.
Demonstrated correlation between molecular structure and fluorescence.

Abstract

Three quadrupolar fluorene-based dyes differing only by nonconjugated substituents form fluorescent organic nanoparticles (dFONs) with tunable emission from blue to yellow. A spirocyclic central substituent induces a marked red-shift via...

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