1. Stratingh Institute, University of Groningen, Nijenborgh 4, 9747 AG Groningen, Netherlands
2. Dutch Polymer Institute (DPI), P. O. Box 902, 5600 AX Eindhoven, Netherlands
3. Inorganic and Organometallic Chemistry, University of Erlangen‐Nürnberg, Egerlandstr. 1, 91058 Erlangen, Germany, http://www.harder‐research.com