Abstract
We report three electrically conductive metal-organic frameworks (MOFs) based on a tetrathiafulvalene linker and La3+. Depending on the solvent ratios and temperatures used in their solvothermal synthesis, these MOFs crystallize with different topologies containing distinct π-π stacking sequences of the ligand. Notably, their transport properties correlate rationally with the stacking motifs: longer S⋯S contact distances between adjacent ligands coincide with lower electrical conductivities and higher activation energies. Diffuse reflectance spectroscopic measurements reveal ligand-based intervalence charge transfer bands in each phase, implicating charge delocalization among mixed-valent tetrathiafulvalene units as the dominant mode of transport. Overall, these frameworks demonstrate how tuning the intermolecular interactions in MOFs serves as a route towards controlling their physical properties.
Original language | English (US) |
---|---|
Pages (from-to) | 8558-8565 |
Number of pages | 8 |
Journal | Chemical Science |
Volume | 10 |
Issue number | 37 |
DOIs | |
State | Published - 2019 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- General Chemistry