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| Type |
Poster Presentation |
| Area |
Inorganic Chemistry |
| Room No. |
Event Hall |
| Time |
4월 19일 (목요일) 11:00~12:30 |
| Code |
INOR.P-49 |
| Subject |
New Ni(II), Zn(II) and Co(II) Heptameric Cluster Systems from Dialdehyde |
| Authors |
Ume Farwa, Junseong Lee*
Department of Chemistry, Chonnam National University, Korea
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| Abstract |
We report the three polymetallic heptameric complexes [Ni7L6(µ3-OH)6].(ClO4)2 (1), [Zn7L6(µ3-OCH3)6].(ClO4)2 (2) and [Co7L6(µ3-OH)6]. (ClO4)2, (3), where L=4-tert-Butyl-2,6-diformylphenol. These heptametallic complexes are characterized by IR, NMR (for 3), EA, ESI-MS and X-ray single crystal diffraction. Due to usefulness in gas storage, catalysis, anion sensing recognition and drug delivery, cluster complexes are of highest interest these days. By the right choice of ligand polymetallic supermolecules can be synthesized which find their application as single molecular magnetic (SMM). By treatment of dialdehyde with metal perchlorate salts of Ni, Zn, and Co in the presence of strong base NaOH at elevated temperature using methanol as solvent, rare heptametallic clusters were obtained. The synthesis of these disc-shaped heptameric complexes highly depends on the factors including ligand to metal ratios, temperature and the types of base used. These complexes are only obtained in the presence of a strong base like sodium hydroxide. To validate the synthetic approach, we used a weak base such triethylamine which didn't result in the formation of heptamer complexes. The nature of the ligand having unidirectional coordination sides resulted in the unique arrangement of the metal atoms in the heptameric complexes. The X-ray structural analysis revealed that cores of these crystals are hexagonal shape of MII ions which surround the central metal ion bridged by µ3-OH. The peripheral metal atoms are surrounded by six ligand molecules. |
| E-mail |
ume.farwa14@yahoo.com |
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121st General Meeting of the KCS