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γ-Cyclodextrin Cuprate Sandwich-Type Complexes
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DOI：10.1021/ic301795j.png)
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摘要
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Three structures, based on gamma-cyclodextrin (gamma-CD) and metal ions (Cu2+, Na+, and Rb+), have been prepared in aqueous and alkaline media and characterized structurally by single-crystal X-ray diffraction. Their dimeric assemblies adopt cylindrical channels along the c axes in the crystals. Coordinative and hydrogen bonding between the cylinders and the solvent molecules lead to the formation of two-dimensional sheets, with the identity of the alkali-metal ion strongly influencing the precise nature of the solid-state structures. In the case of the Rb+ complex, coordinative bonding involving the Rb+ ions leads to the formation of an extended two-dimensional structure. Nonbound solvent molecules can be removed, and gas isotherm analyses confirm the permanent porosity of these new complexes. Carbon dioxide (CO2) adsorption studies show that the extended structure, obtained upon crystallization of the Rb+-based sandwich-type dimers, has the highest CO2 sequestration ability of the three gamma-CD complexes reported.
Keyword:
BETA-CYCLODEXTRIN
ALPHA-CYCLODEXTRIN
INCLUSION-COMPOUNDS
METAL-COMPLEXES
SPHERE COORDINATION
CRYSTAL-STRUCTURE
FERROCENE
ROTAXANES
STABILIZATION
DERIVATIVES
期刊
IF:
4.7
论文数:
4.9W
被引数:
10.5W
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