1. College of Materials Science and Engineering, Fuzhou University, Fuzhou 350108, Fujian, P. R. China
2. Fujian Key Laboratory of Functional Marine Sensing Materials, Minjiang University, Fuzhou 350121, Fujian, P. R. China
3. Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249-0698, USA