1. Departament of Organic Materials Chemistry; Institute of Chemistry of New Materials, University of Osnabrueck; D-49076 Osnabrueck Germany
2. Faculty of Management; Culture and Technology; University of Applied Sciences Osnabrueck; D-49809 Lingen (Ems) Germany
3. Faculty of Engineering and Computer Science; University of Applied Sciences Osnabrueck; D-49076 Osnabrueck Germany