1. Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai50200, Thailand
2. Department of Chemistry and the Texas Center for Superconductivity, University of Houston, Houston, Texas77204-5003, United States
3. Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai50200, Thailand
4. Center of Excellence in Materials Science and Technology, Chiang Mai University, Chiang Mai50200, Thailand