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Million-Fold Electrical Conductivity Enhancement in Fe2(DEBDC) versus Mn2(DEBDC) (E = S, O)
Lei Sun1, Christopher H Hendon2, Mikael A Minier1
1†Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.
Journal of the American Chemical Society
|May 2, 2015
Summary
Iron-based metal-organic frameworks (MOFs) exhibit significantly higher electrical conductivity due to iron
Area of Science:
- Materials Science
- Chemistry
Background:
- Metal-organic frameworks (MOFs) are crystalline porous materials with diverse applications.
- Electrical conductivity in MOFs is a key property for electronic applications.
- Iron-based MOFs offer potential for enhanced electronic properties.
Purpose of the Study:
- To synthesize and characterize iron-based metal-organic frameworks (MOFs).
- To investigate the electrical conductivity of these iron MOFs.
- To understand the factors contributing to conductivity in MOFs.
Main Methods:
- Synthesis of Fe2(DSBDC) via reaction of FeCl2 and H4DSBDC.
- Comparison of electrical conductivity with analogues like Fe2(DOBDC) and Mn2(DEBDC).
- Analysis of electronic structure to explain conductivity differences.
Main Results:
- Fe2(DSBDC) and Fe2(DOBDC) exhibit bulk electrical conductivity ~6 orders of magnitude higher than Mn(2+) analogues.
- The enhanced conductivity in iron MOFs is attributed to the Fe(2+) β-spin electron.
- Iron is advantageous for synthesizing conductive MOFs.
Conclusions:
- Iron-based MOFs demonstrate superior electrical conductivity compared to manganese analogues.
- The electronic properties of the metal center significantly influence MOF conductivity.
- This research guides the rational design of conductive MOFs using iron.
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