Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 18, Issue 3, Pages 814-821Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201102961
Keywords
fluorescence spectroscopy; FRET; rhodamine; silica nanoparticles; spiropyran
Categories
Funding
- Deutsche Forschungsgemeinschaft [SFB 613]
- Bielefeld University
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Switchable fluorescent silica nanoparticles have been prepared by covalently incorporating a fluorophore and a photochromic compound inside the particle core. The fluorescence can be switched reversibly between an on- and off-state via energy transfer. The particles were synthesized using different amounts of the photoswitchable compound (spiropyran) and the fluorophore (rhodamine B) in a size distribution between 98 and 140 nm and were characterized in terms of size, switching properties, and fluorescence efficiency by TEM, and UV\Vis and fluorescence spectroscopy.
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