1. Institute of Coal Chemistry; Chinese Academy of Sciences; 27 South Taoyuan Road Taiyuan 030001, People's Republic of China
2. Graduate University of Chinese Academy of Sciences; Beijing, People's Republic of China
3. Bruker (Beijing) Scientific Technology Co. Ltd. 8F, Tower C, Building B-6; No 66 Xi Xiao Kou Road, Haidian District Beijing China 100192
4. Department of Chemistry; University of Copenhagen; Universitetsparken 5 DK-2100 Copenhagen Denmark