State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Frontiers Science Center for New Organic Matter, College of Chemistry, No. 94, Weijin Road, Nankai District, Tianjin 300071, P. R. China (Tel: +86-13920714666; Fax: +86 022-23503620; e-mail: fanzj@nankai.edu.cn for Zhijin Fan).
State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Frontiers Science Center for New Organic Matter, College of Chemistry, No. 94, Weijin Road, Nankai District, Tianjin 300071, P. R. China (Tel: +86-13920714666; Fax: +86 022-23503620; e-mail: fanzj@nankai.edu.cn for Zhijin Fan).