1. Department of Chemistry Shenzhen Engineering Research Center for Frontier Materials Synthesis at High Pressures Southern University of Science and Technology (SUSTech) Shenzhen Guangdong 518055 P. R. China
2. Institute of Molecular Sciences and Engineering Shandong University Qingdao 266237 P. R. China
3. Centre for Optical and Electromagnetic Research Guangdong Provincial Key Laboratory of Optical Information Materials and Technology South China Academy of Advanced Optoelectronics South China Normal University Guangzhou 510006 P. R. China