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| Type |
Poster Presentation |
| Area |
Inorganic Chemistry |
| Room No. |
Exhibition Hall 2+3 |
| Time |
10월 19일 (목요일) 11:00~12:30 |
| Code |
INOR.P-47 |
| Subject |
New Ni(II), Zn(II) and Co(II) Heptameric Systems from dialdehyde |
| Authors |
Ume Farwa, Junseong Lee1,*
Chonnam National University, Pakistan
1Department 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-OH)6](ClO4)2 (2) and [Co7L6(µ3-OH)6](ClO4)2 , (3), where L=4-tert-Butyl-2,6-diformylphenol. These heptametallic complexes are characterised by IR, NMR (for 2), EA, ESI-MS and X-ray single crystal diffraction. Due to usefulness in gas storage, catalysis, anion sensing recognition and drug delivery superamolecules are of highest interest these days. By the right choice of ligand polymetallic superamolecules can be synthesised 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 temperature 50̊ C using methanol as solvent and stirring it for 3h, rare heptametallic superamolecules are obtained. The synthesis of these disc shaped hetameric 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 strong base like sodium hydroxide. To validate the synthetic approach, we used weak base such triethylamine which didn't result in the formation of heptamer system. Due to the unidirectional coordination sites of the ligand the arrangement of metal atoms and the ligand is very spare. 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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120th General Meeting of the KCS