1. Department
of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale del Risorgimento 4, I-40136 Bologna, Italy
2. Department
of Chemistry, Faculty of Education, Shizuoka University, 836 Ohya, Shizuoka 422-8529, Japan
3. Department
of Optoelectronics and Nanostructure Science, Graduate School of Science
and Technology, Shizuoka University, 836 Ohya, Shizuoka 422-8529, Japan
4. Fachbereich
Materialforschung und Physik, Abteilung Physik und Biophysik, Universität Salzburg, Hellbrunnerstraße 34, A-5020 Salzburg, Austria