1. Department of Physical Science and Technology Central China Normal University Wuhan 430079 P. R. China
2. Sauvage Center for Molecular Sciences Hubei Key Lab on Organic and Polymeric Optoelectronic Materials Department of Chemistry Wuhan University Wuhan 430072 P. R. China
3. Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan 430074 P. R. China
4. Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates (South China University of Technology) Guangzhou 510640 P. R. China
5. Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province Shantou University Shantou 515063 P. R. China