1. State Key Laboratory of Structural ChemistryFujian Institute of Research on the Structure of MatterChinese Academy of Sciences and College of ChemistryFuzhou University Fuzhou Fujian 350002 P. R. China
2. State Key Laboratory of Solidification ProcessingCenter of Advanced Lubrication and Seal MaterialsNorthwestern Polytechnical University Xi'an Shaanxi 710072 P. R. China
3. College of ChemistryFuzhou University Fuzhou Fujian 350108 P. R China