1. State Key Laboratory of Supramolecular Structure and Materials College of Chemistry Jilin University Changchun, Jilin 130012 P. R. China
2. Department of Chemistry University of South Florida Tampa FL 33620 USA
3. Department of Chemistry University of North Texas 1508 W Mulberry St Denton TX76201 USA
4. Department of Chemistry and Biomedical Engineering University of South Florida Tampa FL 33620 USA