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Two-Photon Excitation Temperature Nanosensors Based on a Conjugated Fluorescent Polymer Doped with a Europium Probe.
- Source :
-
Advanced Optical Materials . Nov2016, Vol. 4 Issue 11, p1854-1859. 6p. - Publication Year :
- 2016
-
Abstract
- A strongly fluorescent organic semiconducting polymer doped with a highly temperature dependent fluorescent europium(III) complex is converted into a nanosized material that is capable of optically sensing temperature ( T) in the range from 0 to 50 °C via two-photon excitation at 720 nm. The nanosensors are prepared from a blue-fluorescent polyfluorene that acts as both a light-harvesting antenna (to capture two-photon energy) and an energy donor in a fluorescence resonance energy transfer (FRET) system. The photonic energy absorbed by the polymer is transferred to the T-sensitive red-luminescent europium complex contained in the nanoparticles. The close spatial proximity of the donor and the acceptor warrants efficient FRET. A poly(ethylene glycol)- co-poly(propylene oxide) block copolymer is also added to render the particles biocompatible. It is shown that T can be calculated from a) the intensity of the luminescence of the europium complex, b) the ratio of the intensities of the red and blue luminescence, or c) the T-dependent luminescence lifetime of the Eu(III) complex. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 21951071
- Volume :
- 4
- Issue :
- 11
- Database :
- Academic Search Index
- Journal :
- Advanced Optical Materials
- Publication Type :
- Academic Journal
- Accession number :
- 120265729
- Full Text :
- https://doi.org/10.1002/adom.201600601