1. Department of Chemistry; Northeastern University; No. 11, Lane 3 Wenhua Road, Heping District Shenyang 110819, P. R. China
2. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai 200050, P. R. China
3. Centre for Protolife Research and Centre for Organized Matter Chemistry, School of Chemistry; University of Bristol; Bristol BS8 1TS UK