Functional Mixed Metal–Organic Frameworks with Metalloligands

Abstract

Immobilization of functional sites within metal-organic frameworks (MOFs) is very important for their ability to recognize small molecules and thus for their functional properties. The metalloligand approach has enabled us to rationally immobilize a variety of different functional sites such as open metal sites, catalytic active metal sites, photoactive metal sites, chiral pore environments, and pores of tunable sizes and curvatures into mixed metal-organic frameworks (M'MOFs). In this Minireview, we highlight some important functional M'MOFs with metalloligands for gas storage and separation, enantioselective separation, heterogeneous asymmetric catalysis, sensing, and as photoactive and nanoscale drug delivery and biomedical imaging materials.

Magnetic functionalities in MOFs: from the framework to the pore

“…A different synthetic approach for the preparation of MOFs consists in the use of a ''complex-asligand'' strategy, where a preformed complex acts as a metalloligand. 48 In this approach, a metal complex with vacant additional coordination sites is first prepared and isolated, being used in a second step as a building block towards additional metal ions. 50 The structure consists of an extended parallel array of anionic, oxamato-bridged Mn 4 Cu 6 layers that are further interconnected through two m-phenylene spacers among the Cu II ions (Fig.…”

Synthesis and Characterization of Amine-Functionalized Mixed-Ligand Metal–Organic Frameworks of UiO-66 Topology

“…15,21 In order to circumvent this problem, it has recently been shown that diluting the extent of functionalisation via a "mixed linker" (ML) approach is effective tuning the stability of the material. [22][23][24][25] Furthermore, varying the composition of mixed linkerMOFs can result in systematic alteration of the gas adsorption capacity and selectivity of the material. Such an approach has been previously been adopted on several MOF topologies, namely MOF-5, 26 MIL-53-Al, [27][28] CAU-10, 29 and MIL-101 30 where a mixture of benzene-1,4-dicarboxylic acid (BDC) and its amino-, bromo-, nitro-, methyl-functionalized derivatives were used as linkers.…”

Facile synthesis of MOFs with uncoordinated carboxyl groups for selective CO2 capture via postsynthetic covalent modification

“…1 In the last two decades, a particularly large number of MOFs have been successfully synthesized, [2][3][4][5][6][7] and the versatile characteristics of their chemical moieties have endowed MOFs with many special properties relevant to fuel cell, 8 catalysis 9 and biomedical applications. 10 Because of their ultrahigh porosity and the possibility of functionality, they play an important role in gas adsorption and separation. [11][12][13][14][15] For instance, MOFs are becoming one of the most promising candidates to reduce carbon dioxide (CO 2 ) emissions, which is useful to resolve the increasingly severe global warming problem.…”