4.8 Article

Electronic: Excitation Energy Transfer between Nucleobases of Natural DNA

Journal

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 134, Issue 28, Pages 11366-11368

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/ja304328g

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Funding

  1. French Agency for Research [ANR-10-BLAN-0809-01]
  2. Conselleria de Educacion-Generalitat Valenciana (VALi+D program) [2010033]
  3. ONR/MURI
  4. Agence Nationale de la Recherche (ANR) [ANR-10-BLAN-0809] Funding Source: Agence Nationale de la Recherche (ANR)

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Transfer of the electronic excitation energy in calf thymus DNA is studied by time-resolved fluorescence spectroscopy. The fluorescence anisotropy, after an initial decay starting on the femtosecond time scale, dwindles down to ca. 0.1. The in-plane depolarized fluorescence decays are described by a stretched exponential law. Our observations are consistent with one-dimensional transfer mediated by charge-transfer excited states.

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