1. The Molecular Foundry; Lawrence Berkeley National Laboratory; Berkeley CA 94720 US
2. School of Chemistry and Environment; South China Normal University; Guangzhou 510006 P.R. China
3. Collaborative Innovation Center of Chemistry for Energy Materials (iChEM); Department of Chemistry; Fudan University; 220 Handan Road Shanghai 200433 P.R. China
4. Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Lu Shanghai 200032 P.R. China