1. Department of Chemistry, Hallym University, ChunCheon, KangWonDo 200-702, Korea, Institute of Environment & Life Science, Hallym Academy of Science, Hallym University, ChunCheon, KangWonDo 200-702, Korea, Department of Environmental Science, Kangwon National University, Chuncheon 200-701, Korea, and Department of Chemistry, University of Antwerp, Universiteitsplein 1, B-2610 Antwerp, Belgium