1. Key
Laboratory of Photochemical Conversion and Optoelectronic Materials
and CityU-CAS Joint Laboratory of Functional Materials and Devices,
Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
2. Department
of Chemistry, Korea University, Seoul 136-701, Korea
3. Department
of Chemistry, The University of Texas at Austin, 105 E. 24th,
Street-Stop A5300, Austin, Texas 78712-1224, United States