1. Department of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
2. Department of Chemistry - Ångström Laboratory, Uppsala University, 751 20 Uppsala, Sweden
3. School of Chemical Sciences, Swami Ramanand Teerth Marathwada University, Nanded 431606, Maharashtra, India
4. Department of Chemistry, University of Leuven, Celestijnenlaan 200F, B-3001 Heverlee Leuven, Belgium
5. Department of Biotechnology, Chemistry and Pharmacy, Università di Siena, Via A. Moro 2, 53100 Siena, Italy