1. College of Chemistry; Sichuan University; Chengdu 610064 Sichuan P. R. China
2. Ningbo Institute of Materials Technology and Engineering; Chinese Academy of Sciences; Ningbo 315201 Zhejiang P. R. China
3. College of Chemistry and Chemical Engineering; Qufu Normal University; Qufu 273165 Shandong P. R. China
4. Chengdu Institute of Geology and Mineral Resources; Chengdu 610081 Sichuan P. R. China
5. Chemistry Department; King Abdulaziz University; Jeddah 21589 Saudi Arabia