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Unraveling the Semiconducting/Metallic Discrepancy in Ni3(HITP)2

Journal Article · · Journal of Physical Chemistry Letters
Here, Ni3(2,3,6,7,10,11-hexaiminotriphenylene)2 is a π-stacked layered metal–organic framework material with extended π-conjugation that is analogous to graphene. Published experimental results indicate that the material is semiconducting, but all theoretical studies to date predict the bulk material to be metallic. Given that previous experimental work was carried out on specimens containing complex nanocrystalline microstructures and the tendency for internal interfaces to introduce transport barriers, we apply DFT to investigate the influence of internal interface defects on the electronic structure of Ni3(HITP)2. The results show that interface defects can introduce a transport barrier by breaking the π-conjugation and/or decreasing the dispersion of the electronic bands near the Fermi level. We demonstrate that the presence of defects can open a small gap, in the range of 15–200 meV, which is consistent with the experimentally inferred hopping barrier.
Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1421638
Report Number(s):
SAND--2017-12553J; 658910
Journal Information:
Journal of Physical Chemistry Letters, Journal Name: Journal of Physical Chemistry Letters Journal Issue: 3 Vol. 9; ISSN 1948-7185
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (9)

Proximity Effect in Crystalline Framework Materials: Stacking‐Induced Functionality in MOFs and COFs journal February 2020
Origin of the Chemiresistive Response of Ultrathin Films of Conductive Metal–Organic Frameworks journal October 2018
Origin of the Chemiresistive Response of Ultrathin Films of Conductive Metal–Organic Frameworks journal November 2018
A Highly Conductive MOF of Graphene Analogue Ni 3 (HITP) 2 as a Sulfur Host for High‐Performance Lithium–Sulfur Batteries journal September 2019
Formation of the layered conductive magnet CrCl2(pyrazine)2 through redox-active coordination chemistry journal September 2018
Efficient and tunable one-dimensional charge transport in layered lanthanide metal–organic frameworks journal November 2019
Conductive two-dimensional metal–organic frameworks as multifunctional materials journal January 2018
Pressure-induced metallicity and piezoreductive transition of metal-centres in conductive 2-dimensional metal–organic frameworks journal January 2019
Proximity Effect in Crystalline Framework Materials: Stacking‐Induced Functionality in MOFs and COFs text January 2020

Figures / Tables (6)


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