1. Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
2. Institute of Coal
Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
3. University of Chinese Academy of Sciences, Beijing 100049, China
4. Department of Materials Science and Engineering,
School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Rayong 21210, Thailand