* Corresponding authors

^a School of Chemistry and Chemical Engineering, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510641, China
E-mail: drcao@scut.edu.cn

^b Department of Chemistry, Rutgers University, 73 Warren Street, Newark, NJ 07102, USA
E-mail: haotang.chemistry@rutgers.edu

^c Institute of Organic Chemistry, University of Mainz, D-55099 Mainz, Germany