Million-Fold Electrical Conductivity Enhancement in Fe ₂ (DEBDC) versus Mn ₂ (DEBDC) (E = S, O)

Journal Article · Wed May 06 00:00:00 EDT 2015 · Journal of the American Chemical Society

DOI:https://doi.org/10.1021/jacs.5b02897· OSTI ID:1179607

Sun, Lei ^[1]; Hendon, Christopher H. ^[2]; Minier, Mikael A. ^[1]; Walsh, Aron ^[2]; Dincă, Mircea ^[1]

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1. Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
2. Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom

Reaction of FeCl₂ and H4DSBDC (2,5-disulfhydrylbenzene-1,4-dicarboxylic acid) leads to the formation of Fe₂(DSBDC), an analogue of M₂(DOBDC) (MOF-74, DOBDC4– = 2,5-dihydroxybenzene-1,4-dicarboxylate). The bulk electrical conductivity values of both Fe₂(DSBDC) and Fe₂(DOBDC) are ~6 orders of magnitude higher than those of the Mn²⁺ analogues, Mn₂(DEBDC) (E = O, S). Because the metals are of the same formal oxidation state, the increase in conductivity is attributed to the loosely bound Fe²⁺ β-spin electron. These results provide important insight for the rational design of conductive metal–organic frameworks, highlighting in particular the advantages of iron for synthesizing such materials.

• Research Organization: Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES)
• Grant/Contract Number: SC0006937
• OSTI ID: 1179607
• Alternate ID(s): OSTI ID: 1345981; OSTI ID: 1454937
• Journal Information: Journal of the American Chemical Society, Journal Name: Journal of the American Chemical Society Vol. 137 Journal Issue: 19; ISSN 0002-7863
• Publisher: American Chemical Society
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY