Journal
JOURNAL OF ORGANIC CHEMISTRY
Volume 78, Issue 15, Pages 7373-7379Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jo4010102
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Funding
- DFG [WA 1386/9, WA 1386/13]
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The DNA base substitute approach by the (S)-3-amino-1,2-propanediol linker allows placing two fluorophores in a precise way inside a given DNA framework. The double helical architecture around the fluorophores, especially the DNA-induced twist, is crucial for the desired photophysical interactions. Excitonic, excimer, and energy transfer interactions yield fluorescent DNA and RNA probes with dual emission color readout. Especially, our DNA and RNA traffic light that combines the green emission of TO with the red emission of TR represents an important tool for molecular imaging and can be applied as aptasensors and as probes to monitor the siRNA delivery into cells. The concept can be extended to the synthetically easier to access postsynthetic 2'-modifications and the NIR range. Thereby, the pool of tailor-made fluorescent nucleic acid conjugates can be extended.
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