1. Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200043, China
2. Department
of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China
3. The Molecular Foundry, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, United States
4. Department of Chemistry, University of California, Berkeley, California 94720, United States