1. Office of Research Administration, Chiang Mai University, Chiang Mai 50200, Thailand
2. Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
3. Department of Chemistry, Graduate School of Science, Osaka University, Osaka 560-0043, Japan
4. Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand