1. Department of Chemical and Pharmaceutical Sciences University of Ferrara Via L. Borsari, 46 44121 Ferrara Italy
2. School of Chemical Engineering and Analytical Science The University of Manchester The Mill, Sackville Street Manchester M13 9PL UK
3. Istituto per la Sintesi Organica e la Fotoreattività Consiglio Nazionale delle Ricerche Via P. Gobetti 101-40129 Bologna Italy