Metal‐Organic Frameworks: Metal‐Uptake

摘要: Metal-organic frameworks (MOFs) contain metal cations that are inherent to their framework structure and may also be intrinsic material properties such as magnetism, catalysis, luminescence. Uptake of additional metals by a MOF has the potential introduce new functionality or alter thus finds variety applications. For example, luminescence color changes for sensors, ion exchange, removal contaminants from atmosphere solution, altering gas-binding creation electric dipoles on surface, transport battery Post-synthetic modification (PSM) involves solid-state being chemically altered. PSM MOFs occur heterometallic metal-containing moieties taken up MOF. There number mechanisms effect uptake in MOFs. Direct grafting onto can at pendant, unmetallated sites embedded within linker ligand. through pendant thiols alcohol groups lining pores, chelating macrocyclic framework. Organometallic fragments directly grafted arene rings ligands. organic functional used either create ligand group binding, tether complex. Other forming metal-binding demetallation nonstructural cation site, linking metal-salen ligand, use defect approach where ligands with binding doped into during its synthesis. Ion exchange counter-anions pores anionic is another method uptake, often an counter-cation metal. Metal-containing guest molecules absorbed solution immersion chemical vapor deposition techniques. Such complexes precursors form metal@MOFs hydrid materials nanoparticles pores. Exchange between structural components MOF, metathesis, referred transmetallation, substituted different cation, usually retention gross original structure. Keywords: cation exchange; coordination polymer; metal doping; metallation; metal metathesis; pore uptake; post-synthetic modification; transmetallation