1. Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, KY16 9ST St Andrews, U.K.
2. Laboratory for Chemistry of Novel Materials, University of Mons, 7000 Mons, Belgium
3. Department of Physical Chemistry, University of Alicante, E-03080 Alicante, Spain
4. Wigner Research Centre for Physics, P.O. Box 49, 1121 Budapest, Hungary
5. Laboratory for Computational Modeling of Functional Materials, Namur Institute of Structured Matter, University of Namur, Rue de Bruxelles, 61, 5000 Namur, Belgium