1. Department of Chemistry, School of Science, Kobe University, Rokko-dai, Nada, Kobe 657-8501, Japan
2. Graduate School of Information Sciences, Hiroshima City University, Hiroshima 731-3194, Japan
3. Department of Physical Science and Engineering, Nagoya Institute of Technology, Gokiso, Showa, Nagoya 466-8555, Japan
4. Frontier Research Institute for Materials Science, Nagoya Institute of Technology, Gokiso, Showa, Nagoya 466-8555, Japan