Institution: | a Department of Chemistry, Dongguk University, Kyungju, Kyungbuk 780-714, South Korea b Department of Chemistry and Division of Nano Sciences, Ewha Womans University, 11-1 Daehyun-Dong, Seodaemun-Ku, Seoul 120-750, South Korea c Graduate School of Information Science, Nara Institute of Science and Technology, 8916-5 Takayama-cho, Ikoma, Nara 630-0101, Japan |