1. Tianjin
Key Laboratory of Molecular Optoelectronic Sciences, School of Chemical
Engineering and Technology, Tianjin University, and Collaborative Innovation Center of Chemical Science
and Engineering (Tianjin), Tianjin 300072, P. R. China
2. Beijing
Key Laboratory for Optical Materials and Photonic Devices, Department
of Chemistry, Capital Normal University, Beijing 100048, P. R. China