Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 18, Issue 52, Pages 16642-16648Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201202899
Keywords
adsorption; magnetism; metal-ion exchange; metal-organic frameworks; metathesis
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Funding
- Acceleration Research, Brain Korea 21, World Class University project of the National Research Foundation of Korea [R31-2008-000-10059-0]
- Steel Science Program of POSCO
- MEST
- POSTECH
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A porous metalorganic framework, Mn(H3O)[(Mn4Cl)(3)(hmtt)(8)] (POST-65), was prepared by the reaction of 5,5',10,10',15,15'-hexamethyltruxene-2,7,12-tricarboxylic acid (H(3)hmtt) with MnCl2 under solvothermal conditions. POST-65(Mn) was subjected to post-synthetic modification with Fe, Co, Ni, and Cu according to an ion-exchange method that resulted in the formation of three isomorphous frameworks, POST-65(Co/Ni/Cu), as well as a new framework, POST-65(Fe). The ion-exchanged samples could not be prepared by regular solvothermal reactions. The complete exchange of the metal ions and retention of the framework structure were verified by inductively coupled plasmaatomic emission spectrometry (ICP-AES), powder X-ray diffraction (PXRD), and BrunauerEmmettTeller (BET) surface-area analysis. Single-crystal X-ray diffractions studies revealed a single-crystal-to-single-crystal (SCSC)-transformation nature of the ion-exchange process. Hydrogen-sorption and magnetization measurements showed metal-specific properties of POST-65.
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