1. U-60, Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3060, Department of Chemical Engineering and Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269-3060, Fujitsu Laboratories, Ltd., 1015 Kamikodanaka, Nakahara 211, Japan, and Department of Chemistry, Nagasaki University, Bunkyomachi 1-14 Nagasaki 852, Japan