1. Department of Chemistry, Changwon National University, Changwon 641-773, Korea (L.N., H.-H.C., Y.-I.L.); Laboratory for Quantum Optics, Korea Atomic Energy Research Institute, Taejon, 305-600, Korea (K.S., H.C.); and Department of Applied Chemistry, Kyungnam University, Masan 631-260, Korea (Y.K.)