1. Faculty of Chemistry, Silesian University of Technology, Strzody 9, 44-100 Gliwice, Poland
2. Centre for Organic and Nanohybrid Electronics, Silesian University of Technology, Konarskiego 22B, 44-100 Gliwice, Poland
3. Department of Physics, Durham University, Durham, DH1 3LE, UK
4. Department of Chemistry, Durham University, Durham, DH1 3LE, UK