1. Stoddart Institute of Molecular Science, Department of Chemistry, Zhejiang University, Hangzhou 310058, P. R. China
2. Zhejiang-Israel Joint Laboratory of Self-Assembling Functional Materials, ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 311215, P. R. China
3. Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
4. Department of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, P. R. China