1. Inorganic Chemistry and Catalysis GroupDebye Institute for Nanomaterials ScienceUtrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
2. NMR Spectroscopy groupBijvoet Center for Biomolecular ResearchUtrecht University Padualaan 8 3584 CH Utrecht The Netherlands
3. Current address: DSM Food SpecialtiesDSM Biotechnology CenterR&D analysis Alexander Flemminglaan 1 2613 AX Delft The Netherlands