Hierarchical metal-organic framework (MOF) pore engineering

Abstract

Metal-Organic Framework (MOF) is a type of coordination networks with high surface area and tunable chemistry. MOFs are utilized for molecular recognition-related applications. The interaction of MOFs with molecules of interest occurs at the internal and external surfaces of MOFs, where internal surfaces are mostly inside the MOF pores. It is important to tune this interaction by pore engineering. We reviewed pore engineering at 4 different length scales: unit cell, multi-unit cells, mesoscale and macroscale. Additionally, we also discussed practical consequences of pore engineering on mass transfer, heat transfer and mechanical stability of MOF materials. • Common chemical methods for engineering MOF pores at various length scales are reviewed. • Consequences of pore engineering are reviewed with applications of such MOFs. • Practical applications of MOF pore engineering on their mass transfer, heat transfer and mechanical properties are reviewed. • Recommendations for future research on hierarchical MOFs are provided.