Metal-organic frameworks, a class of coordination polymers, gained popularity in the fields of gas storage and gas sorption due to their high surface areas. In the field of catalysis, such high surface areas can potentially lead to high catalytic efficiency. However, the realization of that potential rests in the ability for substrates to reach the entire internal surface area of the MOFs. The Morris group has extensively explored electron and ion motion through MOF crystallites in response to an applied potential. Interestingly, the rate of ion diffusion through a MOF can be 3 to 6 orders of magnitude slower than that through a homogeneous solution. Considering the redox hopping mechanism of electron transport through MOFs, we have uncovered the fundamental parameters that can be manipulated to result in faster diffusion. In this presentation, we will discuss the role of molecular identity, pore size, and 3D structure on the rates of electron and ion diffusion. A quantitative model to independently quantify these diffusion rates will be presented.

Redox hopping electron and ion transport in metal-organic framework materials

2019 Fall National Meeting

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.