1. Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, Key Laboratory of High-Performance Polymer-BasedComposites of Guangdong Province, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
2. School of Chemistry and Chemical Engineering, Lingnan Normal University, Guangdong, 524048, China
3. Department of Physics and Texas Center for Superconductivity at the University of Houston (TcSUH), Houston, TX 77204, USA