1. Guangdong University of Petrochemical Technology School of Chemistry Maoming 525000 P. R. China
2. Zhuhai College of Science and Technology School of Applied Chemistry and Materials Zhuhai 519040 P. R. China
3. Guangdong University of Petrochemical Technology School of Chemical Engineering Maoming 525000 P. R. China
4. Ruhr-University Bochum Laboratory of Industrial Chemistry 44801 Bochum Germany
5. Technical University of Munich Inorganic and Metal-Organic Chemistry Department of Chemistry 85748 Garching Germany