1. Macromolecular Chemistry I, Bayreuther Institut für Makromolekülforschung (BIMF) and Bayreuther Zentrum für Kolloide und Grenzflächen (BZKG), University Bayreuth, 95440 Bayreuth (Germany), Fax: (+49) 921‐55‐3206
2. Theoretical Physics IV, University Bayreuth, 95440 Bayreuth (Germany),
3. Current Address: Institute of Chemistry of São Carlos, University of São Paulo, Av. Trab. Sãocarlense 400, 13560‐970 São Carlos (Brazil)