1. College of Chemistry; Nankai University; Tianjin 300071 China
2. Department of Chemistry; University of South Florida; 4202 East Fowler Avenue, CHE205 Tampa Florida 33620-5250 USA
3. Department of Chemistry; HBNUST; Qinhuangdao 066004 China
4. State Key Laboratory of Medicinal Chemical Biology; Nankai University; Tianjin 300071 China
5. Department of Chemical Sciences; Bernal Institute; University of Limerick; Limerick V94T9PX Republic of Ireland
6. Key Laboratory of Advanced Energy Materials Chemistry (MOE); Nankai University; Tianjin 300071 China