1. Key Laboratory of Green Chemistry and Technology (Ministry of Education), College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
2. Department of Chemistry, Center for Light Energy Activated Redox Processes (LEAP), Materials Research Center (MRC), Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA
3. Flexterra Inc., 8025 Lamon Avenue, Skokie, IL 60077, USA