1. Center for Advanced Specialty Chemicals, Korea Research Institute of Chemical Technology, Ulsan 681-802, Republic of Korea
2. Department of Chemistry, University of Ulsan, Ulsan 680-749, Republic of Korea
3. Department of Chemistry, and Chemistry Institute for Functional Materials, Pusan National University, Busan 46241, Republic of Korea
4. Korea Research Institute of Standards and Science, Daejeon 305-340, Republic of Korea