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A Bright NIR-II Fluorescence Probe for Vascular and Tumor Imaging
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Red/NIR G-Quadruplex Sensing, Harvesting Blue Light by a Coumarin-Naphthalene Diimide Dyad
Michela Zuffo1, Filippo Doria1, Vincenzo Spalluto1
1Dipartimento di Chimica, Università di Pavia, V.le Taramelli 10, 27100, Pavia (Italy).
Abstract:
A conceptually new light-up nucleic acid fluorescent probe resulting from the conjugation of a coumarin to a naphthalene diimide exhibits a single wavelength emission at 498 nm when free in solution and an additional red/NIR emission when bound to G-quadruplex DNA. The light-up response centred at 666 nm is highly specific for quadruplex DNA when compared to duplex DNA or to RNA quadruplexes.
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