1. Contribution from the Department of Applied Chemistry, National Defense Academy, Yokosuka, Kanagawa 239-8686, Japan, Division of Biological Sciences, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan, Center for Interphase Chemistry and Catalysis, K. U. Leuven, Kardinaal Mercierlaan 92, B-3001 Leuven, Belgium, Center for Research on Molecular Electronics and Photonics, K. U. Leuven, Celestijnenlaan 200-D, B-3001 Leuven, Belgium, and Department of Chemistry, K. U. Leuven,...