1. State key laboratory of organometallic chemistryCenter for excellence in molecular synthesisShanghai Institute of Organic Chemistry, CAS 345 Lingling Road Shanghai 200032 P. R. China
2. CAS Key Laboratory of Energy Regulation MaterialsShanghai Institute of Organic Chemistry, CAS 345 Lingling Road Shanghai 200032 P. R. China
3. The Scripps Research Institute (TSRI) 10550 North Torrey Pines Road La Jolla CA 92037 USA