1. Department
of Chemistry, University of Incheon, 12-1
Songdo-dong, Yonsu-ku,
Incheon, 406-772, South Korea
2. Department of Chemistry, Clayton State University, Morrow, Georgia 30260, United
States
3. Department of Chemistry, , P.O. Box 400319, Charlottesville, Virginia
22904-4319, United States