1. Z.-R. Tian, W. Tong, J.-Y. Wang, Department of Chemistry, University of Connecticut, Storrs, CT 06269–4060, USA.
2. N.-G. Duan, Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA.
3. V. V. Krishnan, Department of Chemical Engineering, University of Connecticut, Storrs, CT 06269, USA.
4. S. L. Suib, Departments of Chemistry and Chemical Engineering and Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA.