1. College of Chemistry and Chemical Engineering
2. Henan Key Laboratory of Function-Oriented Porous Materials
3. Luoyang Normal University
4. Luoyang 471934
5. P. R. China
6. Hebei Key Laboratory of Heterocyclic Compounds
7. Handan University
8. Handan 056005
9. China
10. School of Petrochemical Engineering
11. Shenyang University of Technology
12. Liaoyang