1. Department of ChemistryHue University Hue 8454 Vietnam
2. Vietnam Academy of Science and Technology Hanoi 844 Vietnam
3. Institute of Natural ResourcesEnvironment and Sustainable Development Hue 8454 Vietnam
4. International Training Institute for Materials Science (ITIMS)Hanoi University of Science and Technology (HUST) Hanoi 844 Viet Nam
5. Department of ChemistryKorea University Seoul 136‐701 Korea