1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University Shanghai 201620 China
2. Department of Chemistry Boston College Chestnut Hill MA 02467 USA
3. Department of Chemistry Fudan University Shanghai 200433 China
4. Key Laboratory of Synthetic and Biological Colloids Ministry of Education School of Chemical and Material Engineering Jiangnan University Wuxi 214122 China