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Designing expanded bipyridinium as redox and optical probes for DNA

Abstract : We report on the light-switch behaviour of two head-to-tail expanded bipyridinium species as a function of their interaction with calf thymus DNA and polynucleotides. In particular, both DNA and polynucleotides containing exclusively adenine or guanine moieties quench the luminescence of the fused expanded bipyridinium species. This behaviour has been rationalized demonstrating that a reductive photoinduced electron transfer process takes place involving both adenine or guanine moieties. The charge separated state so produced recombines in the tens of picoseconds. These results could help on designing new organic substrates for application in DNA probing technology and lab on chip-based sensing systems.
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Contributor : Philippe Lainé Connect in order to contact the contributor
Submitted on : Tuesday, December 15, 2020 - 6:08:21 PM
Last modification on : Saturday, November 26, 2022 - 9:00:25 AM
Long-term archiving on: : Tuesday, March 16, 2021 - 6:12:45 PM


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Emanuela Trovato, Maria Letizia Di Pietro, Antonino Giannetto, Gregory Dupeyre, Philippe Lainé, et al.. Designing expanded bipyridinium as redox and optical probes for DNA. Photochemical & Photobiological Sciences , 2020, 19 (1), pp.105-113. ⟨10.1039/c9pp00418a⟩. ⟨hal-03046812⟩



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