1. Department of Chemistry and
Institute for Biological Interfaces, Sogang University, Seoul 121-742, Republic of Korea
2. Chemical Synthesis Group, Samsung Cheil Industries, Uiwang 437-711, Republic
of Korea
3. Advanced Analysis
Center, Korea Institute of Science and Technology, Seoul 136-791,
Republic of Korea
4. Advanced
Material Research Center,
Samsung Advanced Institute of Technology, Samsung Electronics Company, 449-712 Republic of Korea