1. College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi 712100, P. R. China
2. Xi’an Key Laboratory of Advanced Photo-electronics Materials and Energy Conversion Device, Xijing University, Xi’an, Shaanxi 710123, P. R. China
3. SCNU Qingyuan Institute of Science and Technology Innovation Co., Ltd., Qingyuan 511517, P. R. China
4. Department of Chemistry and Center for Computational Chemistry, University of Georgia, Athens, Georgia 30602, United States