1. Department of Chemistry, University of South Florida, Tampa, Florida 33620, United States
2. Shandong Province Key Laboratory of Medical Physics and Image Processing Technology, School of Physics and Electronics, Shandong Normal University, Jinan 250358, China
3. Single Molecule Study Laboratory, College of Engineering and Nanoscale Science and Engineering Center, University of Georgia, Athens, Georgia 30602, United States
4. College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
5. State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, Jilin 130012, China
6. College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, Henan 450001, China
7. Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States