1. Department
of Engineering Physics, École Polytechnique de Montréal, C.
P. 6079, Succ. Centre-Ville, Montréal, Québec H3C 3A7, Canada
2. Elettra—Sincrotrone Trieste S.C.p.A., S.S. 14 - km 163, 5 in AREA Science Park, 34149 Basovizza, Trieste, Italy
3. Département
de Chimie, Université de Montréal, 2900 boulevard Edouard Montpetit, Montréal, Québec H3T 1J4, Canada