1. Department of Liberal Arts and Basic Sciences, College of Industrial Technology, Nihon University, Narashino, Chiba, Japan 275-8575
2. NSM, Research Unit for Functional Biomaterials, Roskilde University, Roskilde DK-4000, Denmark
3. Department of Chemistry, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1, and Research Center for Molecular Thermodynamics, Graduate School of Science, Osaka University, Toyonaka, Osaka, Japan 560-0043