X-ray radiation exhibits diminished scattering and a greater penetration depth in tissue relative to the visible spectrum and has spawned new medical imaging techniques that exploit x-ray luminescence of nanoparticles. The majority of the nanoparticles employed in this field utlize metals with high atomic numbers and pose potential toxicity effect. The current effort presents a general strategy for the preparation of a fully organic x-ray radioluminescent colloidal platform that can be tailored to emit in the visible spectrum through a judicious choice in donor/acceptor pairing and multiple sequential Förster resonance energy transfers (FRETs). Utilizing 100 nm particles that are doped with anthracene as the scintillating molecule which “pumps” subsequent FRET dye pairs results in emissions from ca. 400 nm out to ca. 775 nm. The particles could be self-assembled into long-range ordered arrays, and the luminescence of the particles could be dynamically tuned by coupling the observed rejection wavelength with the particles’ emission.<br/>

Coupling radio- and photo-luminescent emitters in crystalline colloidal arrays

2019 Spring National Meeting

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