1. Department of Chemistry; City University of Hong Kong; Tat Chee Avenue Hong Kong SAR P.R. China
2. State Key Laboratory of Millimeter Waves; City University of Hong Kong; Tat Chee Avenue, Kowloon Hong Kong SAR P.R. China
3. Shenzhen Research Institute; City University of Hong Kong; Shenzhen 518057 P. R. China
4. State Key Laboratory of Quality Research in Chinese Medicine; Institute of Chinese Medical Sciences; University of Macau; Macao P.R. China
5. Department of Chemistry; Hong Kong Baptist University, Kowloon Tong; Hong Kong SAR P.R. China