1. Engineering Research Center of Light Stabilizers for Polymer Materials, Universities of Shaanxi Province, School of materials science and chemical engineering, Xi’an Technological University, Xi’an 710021, China
2. Institute of Molecular Science & Applied Chemistry, School of Chemistry, Xi’an Jiaotong University, Xi’an 710049, China
3. School of Physics, Xidian University, Xi’an 710071, China