1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing; Wuhan University of Technology; 122 Luoshi Road Wuhan 430070 P. R. China
2. Department of Chemistry; National Taiwan University; Taipei 10617 Taiwan
3. Department of Chemistry; Renmin University of China; Beijing 100872 P. R. China
4. Department of Physics; Faculty of Science; King Abdulaziz University; Jeddah 21589 Saudi Arabia