title: Formation of complexes between uracil and calcium ions: an ESI/MS/MS study in combination with theoretical calculations.
abstract: Cationized uracil clusters around calcium metal ions were generated in the gas phase by electrospray ionization (ESI). A previous study showed that with particular experimental conditions, hexamer, octamer, decamer, dodecamer and tetradecamer uracil clusters are present in high quantities. New experiments were carried out to understand the reasons for the particular stability of these complexes. MS/MS experiments suggested that these uracil clusters belong to the same family. Based on ab initio and DFT quantum chemistry calculations, structures in agreement with experimental results are proposed for these clusters.
authors.affiliation: Laboratoire de Dynamique, Interactions et Réactivité, Université Pierre et Marie Curie, 4 place Jussieu, 75 005 Paris, CNRS, UMR 7075, France. zins@spmol.jussieu.fr
authors.forename: Emilie-Laure
authors.initials: EL
authors.lastname: Zins
authors.forename: Sophie
authors.initials: S
authors.lastname: Rochut
authors.forename: Claude
authors.initials: C
authors.lastname: Pepe
mesh_terms: D002118:Calcium / Q000737:chemistry*; D002412:Cations / Q000737:chemistry; D005740:Gases / Q000737:chemistry; D008956:Models, Chemical; D011108:Polymers / Q000737:chemistry; D015203:Reproducibility of Results; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D053719:Tandem Mass Spectrometry / Q000379:methods*; D013816:Thermodynamics; D014498:Uracil / Q000737:chemistry*
chemical_list: D002412:Cations; D005740:Gases; D011108:Polymers; D014498:Uracil; D002118:Calcium