1. Key Laboratory of Photochemistry, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China, College of Chemistry, Jilin University, Changchun 130023, China, Key Laboratory of Organic Solid, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China, Theoretical Chemistry, Royal Institute of Technology, SCFAB, S-106 91 Stockholm, Sweden, and Graduate School, Chinese Academy of Sciences, Beijing 100039, China