About this Research Topic
Metal-organic frameworks (MOFs) or porous coordination polymers (PCPs), built up by the combination of metal ions and organic linkers, are crystalline materials with high porosity and enormous internal surface area. These properties, together with the extraordinary degree of variability in both the organic and inorganic components of their structures, have led to MOFs (and PCPs) becoming quite dominant in many fields of chemistry in the past several decades. Such features have allowed MOFs (and PCPs) to be versatile platforms for a great variety of potential applications in fields such as biomedicine, magnetism, gas storage and separation, luminescence and non-linear optics. In addition, MOFs and PCPs synthesized from multi-donor Schiff base derivatives can introduce extended variety in their crystal structure and physical properties. Such a ligand system can be a useful tool for post-synthetic modification (PSM), an attractive method used to obtain sophisticated functional materials due to economic and convenient synthetic processes and the available varieties of functionalized organic groups.
In recent years, these materials have earned a huge reputation in the field of heterogeneous catalysis due to their recoverability and reusability, coupled with tunable pore size, high stability and accessible catalytic sites. In the domain of catalysis, one-pot cascade or domino reactions, in which two or more individual reactions are accomplished in a single pot, represent a clean example of system intensification, concentrated on the maximization of spatial and temporal productiveness with the mobilization of minimal resources. Furthermore, one of the great advantages of one-pot cascade or domino reactions is that it not only reduces the energy consumption and reaction time but also minimizes the excess use of solvents and chemicals However, the development of catalysts for one-pot cascade reactions is not always easy, as the distinct acidic and basic sites tend to neutralize each other, compounding challenges in the architectural design of suitable heterogeneous catalysts. In this context, rationally designed MOFs, in which both Lewis acidic and basic properties can be incorporated, offer tremendous possibilities in the discovery of catalysts for such reactions, and are therefore worth exploring.
The Research Topic welcomes contributions addressing the development of novel catalysts based on MOFs with attractive catalytic properties for cascade reactions. Potential topics include, but are not limited to:
• Synthesis, structural characterization and solid state properties of novel MOFs or PCPs.
• Post-synthetic modification (PSM) of MOFs or PCPs.
• MOFs (or PCPs) as heterogeneous catalysts for cascade/domino reactions, such as deacetalization/Henry reaction, deacetalization/Knoevenagel condensation, oxidation/esterification, oxidation/aldol condensation, oxidation/Knoevenagel condensation etc.
Keywords: Metal-organic frameworks, Coordination polymers, Synthesis, Post synthetic modification, Heterogeneous catalysis, Cascade reactions
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