1. Department of Chemistry, Oakland University, 2200 N. Squirrel Rd., Rochester, Michigan 48309-4477, Institute of Applied Radiation Chemistry, Technical University of Lodz, Zeromskiego 116, 90-924 Lodz, Poland, Department of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383 Wroclaw, Poland, Materials Research Laboratory, University of California, Santa Barbara, California 93106, and Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan