[1] Lab. de Combust. et Syst. Reactifs, CNRS, 1C, Ave. de la Rech. scientifique, 45071 Orléans Cedex 2, France
[2] Ctr. de Géochimie de la Surf., CNRS, Université Louis Pasteur, 28 rue Goethe, F-67083 Strasbourg, France
[3] Department of Chemistry, Dublin Institute of Technology, Kevin Steet, Dublin 8, Ireland
[4] Department of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
[5] Department of Chemistry, University College Cork, Cork, Ireland