1. Contribution from the Institute of Applied Radiation Chemistry, Technical University of Lodz, 93-590 Lodz, Wroblewskiego 15, Poland, Institut fur Allgemeine, Anorganische und Theoretische Chemie, Universitat Innsbruck, Innrain 52A, A-6020 Innsbruck, Austria, and Department of Chemistry, DeMontfort University, Leicester LE1 9BH, United Kingdom