1. JST, ERATO, Isobe Degenerate π-Integration Project and Department of Chemistry; Tohoku University; Aoba-ku Sendai 980-8577 Japan
2. Advanced Institute for Materials Research; Tohoku University; Aoba-ku Sendai 980-8577 Japan
3. Research Institute for Chemical Process Technology; National Institute of Advanced Industrial Science and Technology; Miyagino-ku Sendai 983-8551 Japan
4. Institute for Materials Research; Tohoku University; Aoba-ku Sendai 980-8577 Japan