Energy-Dependent UV Photodissociation of Gas-Phase Adenosine Monophosphate Nucleotide Ions: The Role of a Single Solvent Molecule - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Journal of Physical Chemistry Letters Année : 2014

Energy-Dependent UV Photodissociation of Gas-Phase Adenosine Monophosphate Nucleotide Ions: The Role of a Single Solvent Molecule

Résumé

The photodissociation of gaseous protonated adenosine 5'-monophosphate (AMP) and the same system hydrated with one water molecule has been investigated in the 4 to 13 eV photon energy range by coupling a linear quadrupole ion trap with a synchrotron radiation beamline. The dissociation of the bare AMP cation upon absorption of a single ultraviolet (UV) photon below the ionization energy (IE) almost exclusively produces the protonated adenine base, with a measured photodissociation yield showing spectroscopic features with dominant absorption bands located at 4.75 and 6.5 eV, found in agreement with TD-DFT calculations. Nevertheless, the addition of a single water molecule to the system modifies the dissociation energy dependence and strongly suppresses the cleavage of the glycosidic CN bond below the IE. Both the experimental and theoretical results suggest that a single solvent molecule can intrinsically influence the structure and physicochemical properties of the AMP cation, including its UV induced dissociation pattern, beyond the simple water evaporation.
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Dates et versions

hal-02638052 , version 1 (28-05-2020)

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Aleksandar R. Milosavljevic, Viktor Z. Cerovski, Francis Canon, Milosg Lj. Rankovic, Nikola Skoro, et al.. Energy-Dependent UV Photodissociation of Gas-Phase Adenosine Monophosphate Nucleotide Ions: The Role of a Single Solvent Molecule. Journal of Physical Chemistry Letters, 2014, 5 (11), pp.1994 - 1999. ⟨10.1021/jz500696b⟩. ⟨hal-02638052⟩
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