a
Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, P.R. China
E-mail: junyan@mail.ipc.ac.cn
;
Fax: +86 10 8254 3517
;
Tel: +86 10 8254 3515
b
Graduate University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, P.R. China
c
Chongqing Golute Chemical Co., Ltd, Chongqing, P.R. China