1. State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, E-208 West Campus, 2 Ling Gong Road, Dalian 116024, P. R. China
2. Spectroscopy Laboratory for Functional π−Electronic Systems, Department of Chemistry, Yonsei University, Seoul 120-749, Korea
3. Department of Chemistry, University of North Texas, 1155 Union Circle, P.O. 305070, Denton, Texas 76203-5017, United States