1. Department of Chemistry Institute for Coatings and Surface Chemistry Niederrhein University of Applied Sciences Adlerstr. 1 47798 Krefeld Germany
2. College of Chemistry Beijing Normal University No. 19, Xinjiekouwai St. Haidian District Beijing 100875 P. R. China
3. EASYTEC GmbH Pascalstr. 6 52076 Aachen Germany
4. FEW Chemicals GmbH Technikumstraße 1 06766 Bitterfeld-Wolfen Germany
5. Institute of Organic Chemistry National Academy of Sciences Kiev 03094 Ukraine
6. Spectrum Info Ltd. Murmanskaya 5 02094 Kiev Ukraine