Abstract
We report the electronic structure of two metal-organic frameworks (MOFs) with copper paddle wheel nodes connected by a N2(C2H4)3 (DABCO) ligand with accessible nitrogen lone pairs. The coordination is predicted, from first-principles density functional theory, to enable electronic pathways that could facilitate charge carrier mobility. Calculated frontier crystal orbitals indicate extended electronic communication in DMOF-1, but not in MOF-649. This feature is confirmed by band structure calculations and effective masses of the valence band edge. We explain the origin of the frontier orbitals of both MOFs based on the energy and symmetry alignment of the underlying building blocks. The effects of isovalent substitution on the band structure of MOF-649 are considered. Our findings highlight DMOF-1 as a potential semiconductor with enhanced 1D charge carrier mobility along the framework.
| Original language | English |
|---|---|
| Pages (from-to) | 13160-13165 |
| Number of pages | 6 |
| Journal | Journal of Materials Chemistry A |
| Volume | 8 |
| Issue number | 26 |
| DOIs | |
| Publication status | Published - 2020 Jul 14 |
Bibliographical note
Funding Information:Via our membership of the UK's HEC Materials Chemistry Consortium, which is funded by EPSRC (EP/L000202), this work used the ARCHER UK National Supercomputing Service (http:// www.archer.ac.uk). We are grateful to the UK Materials and Molecular Modelling Hub for computational resources, which is partially funded by EPSRC (EP/P020194/1).
Funding Information:
M. J. G. is funded by the Royal Society of Chemistry. AW is supported by a Royal Society University Research Fellowship.
Publisher Copyright:
© 2020 The Royal Society of Chemistry.
All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)
