Metal Organic Frameworks (MOFs) are a class of highly porous crystalline materials that are constructed from zero- or one-dimensional inorganic chains in combination with multitopic organic ligands. They have received great attention recently due to their large surface area, tunable porosity, and easy preparation, which lead to their versatile applications including gas storage and separation, sensing, catalysis and drug delivery. The versatility of MOFs is further entrenched in the vast available design space offered by the enormous number of metal-linker combinations. However, majority of MOFs are insulators with very few of them showing appreciable electrical conductivity. The insulating nature of MOFs can be traced back to the starting materials used in constructing these hybrid materials. Although conductive MOFs have been reported, very little information about the mechanism of charge transport is available. There are mainly two types of charge transport mechanism reported in such materials, hopping and band transport. Although the field of electrically conductive MOFs has experienced tremendous expansion in the last decade and yielded a variety of MOFs with high mobility and conductivity, majority of these works focus on material design principle and conductivity measurement, leaving the fundamental understanding of CT mechanism underexplored; yet the latter is essential for the further development of this class of materials to be exploited in optoelectronics, solar cells, and photocatalysis. In this work my focus is to explore charge transport mechanisms in MOFs, from a chemical perspective angle providing experimental evidence of such and key insights into factors which affect these mechanisms.

Probing charge transport mechanisms in conductive metal organic frameworks

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