1. Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Frontiers Science Center for Synthetic Biology (Ministry of Education), and Tianjin Collaborative Innovation Centre of Chemical Science & Engineering, Tianjin University, Tianjin 300072, P. R. China
2. International Campus of Tianjin University, Joint School of National University of Singapore and Tianjin University, Fuzhou 350207, Binhai New City, P. R. China