Efficient NIR-I fluorescence photoswitching based on giant fluorescence quenching in photochromic nanoparticles

A photoswitchable near-infrared (NIR) fluorescent nanoparticle (NP) was designed and prepared. The NP showed a characteristic AIE property and high-contrast NIR fluorescence photoswitching with full reversibility. Such efficient NIR fluorescence photoswitching originated from the amplified fluorescence quenching mechanism based on intermolecular energy transfer in a densely packed NP state.

Automated summary

The designed near-infrared fluorescent nanoparticle exhibits AIE properties and high-contrast NIR fluorescence photoswitching, attributed to amplified fluorescence quenching mechanism based on intermolecular energy transfer in a densely packed NP state.