1. Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871
2. Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi’an 710127, Shaanxi Province, PR China
3. Research Division of Environmental Technology, Osaka Research Institute of Industrial Science and Technology, 1-6-50 Morinomiya, Joto-ku, Osaka 536-8553