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Dialkynylpyrenes: strongly fluorescent, environment-sensitive DNA building blocks.
Holger Bittermann1, Doreen Siegemund, Vladimir L Malinovskii
1Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, Bern, CH-3012, Switzerland.
Journal of the American Chemical Society
|October 28, 2008
Summary
New dialkynylpyrene phosphoramidites self-organize in DNA duplexes, showing strong fluorescence. These building blocks offer potential for diagnostic tools and novel DNA-based optical materials.
Area of Science:
- Organic Chemistry
- Biochemistry
- Materials Science
Background:
- Perylene bisimide (PDI) dyes are known for their self-organization in DNA.
- Fluorescent probes are crucial for molecular diagnostics and DNA-based materials.
Purpose of the Study:
- To synthesize and characterize novel dialkynylpyrene phosphoramidites.
- To investigate the incorporation of these compounds into oligonucleotides.
- To evaluate their self-organization and fluorescence properties within DNA duplexes.
Main Methods:
- Chemical synthesis of dialkynylpyrene phosphoramidites.
- Oligonucleotide synthesis incorporating the modified phosphoramidites.
- Spectroscopic analysis (fluorescence spectroscopy) to study self-organization and excimer formation.
Main Results:
- Successful synthesis of two isomeric dialkynylpyrene phosphoramidites.
- Demonstrated incorporation of dialkynylpyrenes into DNA duplexes.
- Observed significant monomer and strong excimer fluorescence from the incorporated pyrene units.
- Dialkynylpyrenes showed self-organization capabilities within DNA duplexes, similar to PDI.
Conclusions:
- Dialkynylpyrene phosphoramidites are effective building blocks for creating functional oligonucleotides.
- The strong fluorescence properties make them suitable for applications in diagnostic tools like molecular beacons.
- These compounds enable the development of novel DNA-based materials with unique optical characteristics.
