1. Shanghai Key Laboratory
of Functional Materials Chemistry, Key Laboratory for Advanced Materials
and Institute of Fine Chemicals, Collaborative Innovation Center for
Coal Based Energy (i-CCE), East China University of Science and Technology, Shanghai 200237, P. R. China
2. Gansu Key Laboratory of Polymer Materials, College of Chemistry and
Chemical Engineering, Key Laboratory of Eco-environment-related Polymer
Materials, Ministry of Education, Northwest Normal University, Lanzhou, 730070 Gansu P. R. China