1. Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province
2. Shantou University
3. Guangdong 515063
4. P. R. China
5. Department of Chemistry
6. South University of Science and Technology of China
7. Shenzhen 518055
8. University of Malaya
9. 50603 Kuala Lumpur
10. Malaysia
11. Chemistry Department