Photoswitching of bis-spiropyran using near-infrared excited upconverting nanoparticles

Chem Commun (Camb). 2012 Jul 25;48(58):7244-6. doi: 10.1039/c2cc33052k. Epub 2012 Jun 18.

Abstract

Bis-spiropryran molecules were grafted onto the surface of upconverting nanoparticles. Fluorescence resonance energy transfer from the upconverting nanoparticles to the surface bis-spiropyran molecules triggered the transformation of the ring-closed bis-spiropyran to the ring-open bis-merocyanine forms.