Metal‐Ion Metathesis in Metal–Organic Frameworks: A Synthetic Route to New Metal–Organic Frameworks |
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| Authors: | Yonghwi Kim Dr. Sunirban Das Saurav Bhattacharya Soonsang Hong Dr. Min Gyu Kim Dr. Minyoung Yoon Prof. Dr. Srinivasan Natarajan Prof. Dr. Kimoon Kim |
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| Affiliation: | 1. Center for Smart Supramolecules, Department of Chemistry and Division of Advanced Materials Science, Pohang University of Science and Technology, San 31 Hyojadong, Pohang 790‐784 (Korea), Fax: (+82)?54‐279‐8129;2. Framework Solids laboratory Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore‐560012 (India);3. Pohang Accelerator Laboratory (PAL), Pohang University of Science and Technology, San 31 Hyojadong, Pohang 790‐784 (Korea) |
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| Abstract: | A porous metal–organic 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 (H3hmtt) 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 plasma–atomic emission spectrometry (ICP‐AES), powder X‐ray diffraction (PXRD), and Brunauer–Emmett–Teller (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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| Keywords: | adsorption magnetism metal‐ion exchange metal– organic frameworks metathesis |
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