1. School of Chemistry and Chemical Engineering Development Center for New Materials Engineering and Technology in Universities of GuangdongLingnan Normal University Zhanjiang 524048, China P. R. China
2. School of Chemistry and Chemical Engineering State Key Laboratory of Luminescent Materials and DevicesSouth China University of Technology Guangzhou 510641 P. R. China
3. Key Laboratory for Advanced Materials and Institute of Fine ChemicalsEast China University of Science & Technology Shanghai 200237 P. R. China