Catal. Sci. Technol This journal is © The Royal Society of Chemistry 2014 a Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev str. bl. 9, 1113 Sofia, Bulgaria. E-mail: [email protected]; Fax: +359 2 8700 225; Tel: +359 2 979 39 61 Research Centre for Natural Sciences, Hungarian Academy of Sciences, Institute of Materials and Enviro...