Journal article
Air-Stability and Carrier Type in Conductive M3(Hexaaminobenzene)2, (M = Co, Ni, Cu)
Journal of the American Chemical Society, Vol.142(25), pp.11123-11130
06/24/2020
DOI: 10.1021/jacs.0c03500
PMID: 32475120
Abstract
Herein, we investigate the effects of changing the metal ions in the M-HAB system, with HAB = hexaaminobenzene ligands and M = Co, Ni, Cu. The phyiscal characteristics of this MOF family are insensitive to changes in the metal cation, which enables systematic evaluation of the effect of metal cation identity on electrical transport properties. We observe that the metal ion profoundly influences the electrical conductivity and dominant carrier type in the resulting MOF and the air-stability thereof. Cu-HAB and Co-HAB are determined to exhibit n-type conduction under both ambient and nitrogen conditions; Ni-HAB is found to be ambipolar, with its dominant carrier type dramatically affected by the environment. We examine these results through calculation of the band structure, the partial density of states, and charge transfer analysis. Unlike traditional conductive organic materials, we find that the air-stability is not well predicted by the LUMO level of these n-type MOFs but instead is additionally dependent on the occupancy and orientation of the metal ion’s d-orbitals and the resulting interaction between the metal ion and ligand. This study provides fundamental insights for rational design of air-stable, electronically conductive MOFs.
Details
- Title: Subtitle
- Air-Stability and Carrier Type in Conductive M3(Hexaaminobenzene)2, (M = Co, Ni, Cu)
- Creators
- Allison C Hinckley - Stanford UniversityJihye Park - Stanford UniversityJoseph Gomes - Stanford UniversityEvan Carlson - Stanford UniversityZhenan Bao - Stanford University
- Resource Type
- Journal article
- Publication Details
- Journal of the American Chemical Society, Vol.142(25), pp.11123-11130
- DOI
- 10.1021/jacs.0c03500
- PMID
- 32475120
- ISSN
- 0002-7863
- eISSN
- 1520-5126
- Grant note
- DOI: 10.13039/100000165, name: Division of Chemistry, award: DGE-1147474; DOI: 10.13039/100006151, name: Basic Energy Sciences, award: DE-SC0016523; DOI: 10.13039/100001082, name: Camille and Henry Dreyfus Foundation
- Language
- English
- Date published
- 06/24/2020
- Academic Unit
- Chemical and Biochemical Engineering
- Record Identifier
- 9984197074702771
Metrics
19 Record Views