1. Shandong Lunan Coal Chemical Research Institute of Engineering and Technology
2. Zaozhuang University
3. Zaozhuang
4. China
5. Department of Chemistry
6. Wroclaw University
7. Wroclaw 50-383
8. Poland
9. Rutgers University
10. Newark
11. USA
12. Chemistry Research Laboratory
13. University of Oxford
14. Oxford
15. United Kingdom