1. Department of Materials Science, Graduate School of Engineering Science, Akita University, 1-1 Tegatagakuen-machi, Akita 010-8502, Japan
2. Graduate School of Organic Materials Science, Yamagata University, 4-3-16, Jonan, Yonezawa, Yamagata 992-8510, Japan
3. Nissan Chemical Industries, Ltd, 6903-1 Oaza-Onoda, Sanyo-Onoda, Yamaguchi 756-0093, Japan
4. Emeritus Professor, Akita University, 1-1 Tegatagakuen-machi, Akita 010-8502, Japan