1. Department
of Chemistry, Stanford University, Stanford,
California 94305, United
States
2. CNRS, CRPP, UPR
8641, F-33600
Pessac, France
3. Universite de Bordeaux, CRPP, UPR 8641, F-33600 Pessac,
France
4. Institut Européen de Chimie et Biologie, F-33607 Pessac, France
5. Stanford Synchroton Radiation
Lightsource, SLAC, Stanford University,
Stanford, California 94309, United States