1. Department of Chemistry, School of Education, Shizuoka University, 836 Ohya, Shizuoka 422-8529, Japan
2. Fachbereich Molekulare Biologie, Abteilung Physik und Biophysik, Universität Salzburg, Hellbrunnerstrasse 34, A-5020 Salzburg, Austria
3. Dipartimento di Chimica Fisica ed Inorganica, Università di Bologna, Viale del Risorgimento 4, I-40136 Bologna, Italy