1. College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471934, P. R. China
2. College of Materials and Chemical Engineering, China Three Gorges University, Yichang 443002, P. R. China
3. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China
4. Binders Division, IMparat Farbwerk Iversen & Mähl GmbH & Co. KG, Siemensstraße 8, D-21509 Glinde/Hamburg, Germany