1. Materials Sciences Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
2. J-PARC Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
3. Graduate School of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
4. Neutron Science and Technology Center, Comprehensive Research Organization for Science and Society (CROSS), Tokai, Ibaraki 319-1106, Japan
5. Graduate School of Engineering, Mie University, Tsu, Mie 514-8507, Japan
6. Yokohama Rubber Co., Ltd., 2-1 Oiwake, Hiratsuka, Kanagawa 254-8601, Japan
7. Division of Multidisciplinary Chemistry, Institute for Chemical Research, Kyoto University, Uji 611-0011, Japan