1. Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
2. University of Chinese Academy of Sciences Beijing 100049 P. R. China
3. College of Chemistry and Chemical Engineering Xi'an University of Science and Technology Xi'an 710054 Shaanxi P. R. China
4. School of Chemical Sciences University of Auckland Auckland 1142 New Zealand