1. Laboratory of Coordination Chemistry, Shenyang University of Chemical Technology, Shenyang 110142, P. R. China, http://www.syuct.edu.cn/
2. Shenyang Institute of Technology, Fushun 113122, P. R. China
3. Department of Chemistry, Nankai University, Tianjin 300007, P. R. China
4. Institute of Organic Chemistry “C.D. Nenitescu”, Romanian Academy, 060023 Bucharest, Romania