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10:34
FRET Microscopy for Real-time Monitoring of Signaling Events in Live Cells Using Unimolecular Biosensors
Published on: August 20, 2012
A versatile standard for bathochromic fluorescence based on intramolecular FRET
Heinz Langhals1, Andreas Walter, Erik Rosenbaum
1Department of Chemistry, University of Munich, Munich, Germany. Langhals@lrz.uni-muenchen.de
Physical Chemistry Chemical Physics : PCCP
|May 13, 2011
Summary
This study details a novel perylene and terrylene tetracarboxylic bisimide dyad exhibiting efficient energy transfer. This compound shows broad absorption and high-yield bathochromic fluorescence, making it suitable as a fluorescence standard.
Area of Science:
- Organic Chemistry
- Photophysics
- Materials Science
Background:
- Perylene and terrylene tetracarboxylic bisimides are known for their photophysical properties.
- Dyads of such molecules can exhibit unique energy transfer characteristics.
- Broad absorption and stable fluorescence are desirable for optical applications.
Purpose of the Study:
- To synthesize a novel dyad comprising perylene and terrylene tetracarboxylic bisimide units.
- To investigate the energy transfer efficiency between the perylene and terrylene components.
- To evaluate the photophysical properties, including absorption and fluorescence spectra, of the synthesized dyad.
Main Methods:
- Synthesis of the perylene-terrylene tetracarboxylic bisimide dyad.
- Spectroscopic analysis, including UV-Vis absorption and fluorescence emission measurements.
- Determination of fluorescence quantum yield and excitation wavelength dependence.
Main Results:
- Efficient energy transfer was observed from the perylene unit to the terrylene unit.
- The dyad displayed broad absorption spectrum.
- High quantum yield bathochromic fluorescence was achieved, independent of excitation wavelengths below 655 nm.
Conclusions:
- The synthesized dyad demonstrates efficient intramolecular energy transfer.
- The compound exhibits desirable photophysical properties for optical applications.
- The dyad is a promising candidate for calibrating fluorescence spectrometers and as a fluorescence standard in the bathochromic region.
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