1. Department of Chemistry National Dong Hwa University No. 1, Sec 2, Da Hsueh Rd. Hualien 974301 Taiwan, R.O.C.
2. Univ Rennes CNRS, ISCR-UMR 6226 35000 Rennes France
3. Institute of Chemistry Academia Sinica Taipei 11528 Taiwan, R.O.C.
4. Neutron Scattering Division Neutron Sciences Directorate Oak Ridge National Laboratory Oak Ridge TN 37831 USA