Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 21, Issue 37, Pages 13058-13064Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201501337
Keywords
Adsorption; metal-organic frameworks; nanostructures; polyoxometalates; synthetic methods
Categories
Funding
- NNSF of China [21001022, 21171033, 21131001]
- NGFR 973 Program of China [2010CB635114]
- NCET in Chinese University [NCET-10-0282]
- PhD Station Foundation of Ministry of Education [20100043110003]
- FANEDD of the P. R. China [201022]
- STDP of Jilin Province [201001169, 20111803]
- FRFCU [09ZDQD003, 10CXTD001]
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Different from the conventional synthesis approaches, such as hydrothermal or solvothermal synthesis, a porous metal azolate framework encapsulating Keggin-type [SiW12O40](4-) anions was prepared by an environmentally friendly, low-cost, and highly efficient steam-assisted conversion method for the first time. The nanosized polyoxometalates as a template were encapsulated by a zeotype 6(4)4(8) cage constructed by 28 nuclear zinc atoms connected through 32 Trz ligands. The obtained composite exhibits excellent thermal and chemical stability; meanwhile, its special ability to selectively absorb water from alcohols makes it efficiently separate water from analytically pure ethanol, with the result that water content decreases from 0.23 to 0.05wt%, which is superior to the standard of chromatographic grade ethanol (<0.1wt%). Besides, alternating current (ac) impedance experiments also reveal that the hybrid is a kind of proton conductive material.
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