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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-22 |
| Subject |
Preparation and Cataylitic effect of zinc(II) 3D coordination networks |
| Authors |
Seo Young Hwang, Ok-Sang Jung*
Department of Chemistry, Pusan National University, Korea
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| Abstract |
Self-assembly of Zn(ClO4) 2 with 1,1,2,2-tetramethyl-1,2-di(pyridin-3-yl)disilane (L) as a bidentate N-donor gives rise to 3D coordination networks, [Zn(μ-OH)(L)] 3 (ClO4) 3·5H2O (1·5H2O), of unique, 103 -asrs net topology. An important feature is that two enantiomeric 3D frameworks, 41 - and 43 -[Zn(μ-OH) (L)] 3 (ClO4)3·5H2O, are interpenetrated to form a racemic two-fold 3D network with cages occupied by two water molecules. Another structural characteristic is a C3-symmetric planar Zn3 (μ-OH) 3 6-membered ring with tetrahedral Zn(II) ions. The steric hindrance of substrates and trace water effects on transesterification catalysis using the network have been scrutinized. The coordination network acts as a remarkable heterogeneous transesterification catalytic system that shows both the significant steric effects of substrate alcohols and momentous water effects. The substrate activity is in the order ethanol > n-propanol > n-butanol > iso -propanol > 2-butanol > tert -butanol. For the reaction system, solvate water molecules within the cages of the interpenetrated 3D frameworks do not decrease the transesterification activity, whereas the trace water molecules in the substrate alcohols act as obvious obstacles to the reaction.
Reference
[1] E. Choi, M. Ryu, H. Lee and O.-S. Jung, Dalton Transactions, , 2017, 46, 4595
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| E-mail |
hsy0326@nate.com |
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120th General Meeting of the KCS