3 years ago

Near-Infrared Photoinduced Reactions Assisted by Upconverting Nanoparticles

Near-Infrared Photoinduced Reactions Assisted by Upconverting Nanoparticles
James P. Blinco, Christopher Barner-Kowollik, Si Wu
The majority of photoreactions reported in the literature rely on wavelengths within the UV and—to a lesser extent—visible regime for activation, either by directly triggering the reaction or by photocatalysis. However, photoreactions induced by near-infrared (NIR) light are highly attractive for biomedical applications as NIR light can penetrate deeper into tissue and causes less damage to photosensitive biological systems. Recently, upconverting nanoparticles (UCNPs) have been employed by us and others to assist NIR photoinduced reactions. UCNPs convert NIR light to UV or visible light, which can trigger photoreactions of conventional UV or visible-light-sensitive compounds. In the current Concept article, we introduce the fundamentals of UCNP-assisted photochemistry and highlight selected future applications and innovative potential for the field. Gently does it: Upconverting nanoparticle-assisted photochemistry is a powerful technique for inducing photochemical processes with near-infrared light. As illustrated in the graphic, upconverting nanoparticles convert near-infrared light to UV or visible light, which can trigger photoreactions of a wide range of photosensitive compounds. Due to the deep tissue penetration of near-infrared light, upconverting nanoparticle-assisted photochemistry is highly promising for inducing photoreactions in deep-tissue biomedical applications.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/chem.201700658

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