1. College of Chemistry and Chemical EngineeringInstitution Qingdao University Qingdao 266071 Shandong P. R. China
2. State Key Laboratory of Fine ChemicalsDalian University of Technology (DUT) Dalian 116024 Liaoning P. R. China
3. Technische Universität München Department Chemie Lichtenbergstr. 4 85748 Garching Germany
4. State Key Laboratory of Environment-friendly Energy MaterialsSouthwest University of Science and Techaology Mianyang 621010 Sichuan P. R. China