1. Department of Chemistry; Graduate School of Science; Kyoto University; Sakyo-ku Kyoto 606-8502 Japan
2. Department of Chemistry and Biochemistry; Graduate School of Engineering; Kyushu University; Fukuoka 819-0395 Japan
3. Department of Chemistry; Spectroscopy Laboratory for Functional π-Electronic System; Yonsei University; 50, Yonsei-ro Seodaemun-gu Seoul 03722 Korea