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Synthesis and Characterization of Photoswitchable Fluorescent SiO 2 Nanoparticles
Author(s) -
May Florian,
Peter Michael,
Hütten Andreas,
Prodi Luca,
Mattay Jochen
Publication year - 2012
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201102961
Subject(s) - fluorophore , fluorescence , photochromism , spiropyran , photochemistry , nanoparticle , materials science , fluorescence in the life sciences , rhodamine , fluorescence spectroscopy , förster resonance energy transfer , fluorescence correlation spectroscopy , covalent bond , particle size , spectroscopy , rhodamine b , characterization (materials science) , chemistry , nanotechnology , organic chemistry , optics , catalysis , physics , photocatalysis , quantum mechanics
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.