1. Department of Chemistry, U-60, University of Connecticut, Storrs, Connecticut 06269-4060, Department of Chemical Engineering and Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269-4060, Department of Electrical Engineering and Applied Physics, Yale University, New Haven, Connecticut 06511, Department of Chemistry, Nagasaki University, Bunkyomachi 1-14 Nagasaki 852, Japan, and Fujitsu Laboratories, Ltd., 1015 Kamikodanaka, Nakahara 211, Japan