1. Contribution from
State and Local Joint Engineering Laboratory for Novel Functional
Polymeric Materials, College of Chemistry, Chemical Engineering and
Materials Science, Soochow University, Suzhou 215123, Jiangsu, People’s Republic of China
2. The Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
3. Department
of Physics, Knox College, Galesburg, Illinois 61401, United States