1. School
of Chemistry and Biochemistry and Center for Organic Photonics and
Electronics, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, United States
2. Department
of Applied Physics, Lanzhou University of Technology, Lanzhou, Gansu 730050, P. R. China
3. State
Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun, 130012 Jilin, P. R. China
4. Department
of Chemistry, King Abdulaziz University, Jeddah 21589, Mekkah, Saudi Arabia