1. Contribution from the Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan, Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan, and Advanced Materials R&D Center, Hitachi Chemical Co., Ltd. 48 Wadai, Tsukuba, Ibaraki 300-4247, Japan