1. School of Materials Science and Engineering University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District Beijing 100083 China
2. Key Laboratory of Organic Polymer Photoelectric MaterialsSchool of Science Xijing University, Xi'an Shaanxi Province 710123 China
3. Department of ChemistryTemple University‐Beury Hall 1901, N. 13th Street Philadelphia, PA 19122 USA