Tunable mixed-valence doping toward record electrical conductivity in a three-dimensional metal–organic framework
SCIE
SCOPUS
- Title
- Tunable mixed-valence doping toward record electrical conductivity in a three-dimensional metal–organic framework
- Authors
- Xie, Lilia S.; Lei, Sun; Wan, Ruomeng; PARK, SARAH SUNAH; DeGayner, Jordan A.; Hendon, Christopher H.; Dinca, Mircea
- Date Issued
- 2018-06
- Publisher
- AMER CHEMICAL SOC
- Abstract
- Partial oxidation of an iron-tetrazolate metal-organic framework (MOF) upon exposure to ambient atmosphere yields a mixed-valence material with single-crystal conductivities tunable over 5 orders of magnitude and exceeding 1 S/cm, the highest for a three-dimensionally connected MOF. Variable-temperature conductivity measurements reveal a small activation energy of 160 meV. Electronic spectroscopy indicates the population of midgap states upon air exposure and corroborates intervalence charge transfer between Fe3+ and Fe2+ centers. These findings are consistent with low-lying Fe3+ defect states predicted by electronic band structure calculations and demonstrate that inducing metal-based mixed valency is a powerful strategy toward realizing high and systematically tunable electrical conductivity in MOFs.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/103338
- DOI
- 10.1021/jacs.8b03604
- ISSN
- 0002-7863
- Article Type
- Article
- Citation
- JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, vol. 140, no. 24, page. 7411 - 7414, 2018-06
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