1. Institute of Macromolecular Compounds; Russian Academy of Sciences; Bolshoi pr. 31, St. Petersburg 199004 Russia
2. G. A. Razuvaev Institute of Organometallic Chemistry; Russian Academy of Sciences; Tropinin Street 49, GSP-445 Nizhny Novgorod 603600 Russia
3. Research Institute of Living Systems; Lobachevsky State University of Nizhny Novgorod; Gagarin pr. 23/1, GSP-20 Nizhny Novgorod 603950 Russia
4. CNRS UMR 5253; Université Montpellier II; Place E. Bataillon 34095 Montpellier cedex 5 France