1. National Institute of Chemistry Department of Inorganic Chemistry and Technology Hajdrihova 19 1000 Ljubljana Slovenia
2. University of Nova Gorica Vipavska 13 5000 Nova Gorica Slovenia
3. Institute Jožef Stefan Department of low and medium energy physics Jamova 39 1000 Ljubljana Slovenia
4. Institute Jožef Stefan Department of Surface Engineering and Optoelectronics Jamova 39 1000 Ljubljana Slovenia
5. Bulgarian Academy of Sciences Institute of Organic Chemistry with Centre of Phytochemistry Acad. G. Bonchev Str., Bl. 9 1113 Sofia Bulgaria