1. School of Chemical Engineering, China University of Mining and Technology, Xuzhou 2221111, Jiangsu province, P. R. China, http://scet.cumt.edu.cn:85/gqy/main.html
2. Department of Inorganic Chemistry, University of Pécs, Ifjúság u. 6, 7624 Pécs, Hungary
3. János Szentágothai Research Center, University of Pécs, Ifjúság u. 20, 7624 Pécs, Hungary
4. State University of Chemistry and Technology, Sheremetevsky str. 7, 153000 Ivanovo, Russia