Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 22, Issue 23, Pages 7711-7715Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201600566
Keywords
coordinatively unsaturated; MOF-5; iron; metal-ion addition; metal-organic framework
Categories
Funding
- NSERC
- CFI
- ACS PRF
- NSF [DMR-1157490, DMR-1309463]
- state of Florida
- NHMFL
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1309463] Funding Source: National Science Foundation
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Coordinatively unsaturated Fe-III metal sites were successfully incorporated into the iconic MOF-5 framework. This new structure, Fe-III-iMOF-5, is the first example of an interpenetrated MOF linked through intercalated metal ions. Structural characterization was performed with single-crystal and powder XRD, followed by extensive analysis by spectroscopic methods and solid-state NMR, which reveals the paramagnetic ion through its interaction with the framework. EPR and Mossbauer spectroscopy confirmed that the intercalated ions were indeed FeIII, whereas DFT calculations were employed to ascertain the unique pentacoordinate architecture around the FeIII ion. Interestingly, this is also the first crystallographic evidence of pentacoordinate ZnII within the MOF-5 SBU. This new MOF structure displays the potential for metal-site addition as a framework connector, thus creating further opportunity for the innovative development of new MOF materials.
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