γ-Cyclodextrin cuprate sandwich-type complexes

Abdulaziz A. Bagabas, Marco Frasconi, Julien Iehl, Brad Hauser, Omar K. Farha, Joseph T. Hupp, Karel J. Hartlieb, Youssry Y. Botros, J. Fraser Stoddart

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16 Citations (Scopus)

Abstract

Three structures, based on γ-cyclodextrin (γ-CD) and metal ions (Cu2+, Li+, 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 γ-CD complexes reported.

Original languageEnglish
Pages (from-to)2854-2861
Number of pages8
JournalInorganic Chemistry
Volume52
Issue number6
DOIs
Publication statusPublished - Mar 18 2013

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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    Bagabas, A. A., Frasconi, M., Iehl, J., Hauser, B., Farha, O. K., Hupp, J. T., Hartlieb, K. J., Botros, Y. Y., & Stoddart, J. F. (2013). γ-Cyclodextrin cuprate sandwich-type complexes. Inorganic Chemistry, 52(6), 2854-2861. https://doi.org/10.1021/ic301795j