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Metal-organic frameworks (MOFs) bring new life to hydrogen-bonding organocatalysts in confined spaces

AuthorsAlegre-Requena, Juan V. ; Marqués-López, Eugenia ; Herrera, Raquel P.; Díaz Díaz, David
Issue Date2016
PublisherRoyal Society of Chemistry (UK)
CitationCrystEngComm 18(22): 3985-3995 (2016)
AbstractHydrogen-bonding organocatalysis has emerged as a promising biomimetic alternative to Lewis acid catalysis. Urea, thiourea and squaramide moieties represent the most common hydrogen-bond donors used for the preparation of these catalysts. However, their significant tendency to undergo self-quenching (self-aggregation) often decreases their solubility and reactivity. Recently, scientists have found a promising way around this problem by immobilizing the hydrogen-bonding organocatalysts on metal-organic frameworks (MOFs). Along with advantageous modular synthesis and recycling properties, the tunable porosity and topology of MOFs also allows fast mass transport and/or interactions with substrates. Herein, we highlight the existing examples dealing with the fabrication and testing of hydrogen-bonding organocatalyst-containing MOFs, providing also our vision for further advances in this area. The results derived from these studies will likely serve as inspiration for the future development of superior hydrogen-bonding organocatalysts to accomplish in confined spaces chemical transformations that are either slow or unaffordable under standard homogeneous conditions.
Publisher version (URL)https://doi.org/10.1039/C5CE02526E
Identifiersdoi: 10.1039/C5CE02526E
e-issn: 1466-8033
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