Iron-Decorated, Guanidine Functionalized Metal-Organic Framework as a Non-heme Iron-Based Enzyme Mimic System for Catalytic Oxidation of Organic Substrates

Abstract

A novel porous functionalized metal-organic framework (MOF) as a non-heme iron-based enzyme mimic system was achieved via two-step post-synthetic modification of the MIL-101(Cr)-NH 2 , and characterized by FT-IR, PXRD, TGA, SEM, EDS, CHN, BET surface area, and ICP-OES analyses. This new modified MOF (MIL-101(Cr)-guanidine-Fe) has been demonstrated to be a highly efficient, active, and reusable catalyst for oxidation of various organic substrates, including alcohols, alkenes and alkyl arenes at room temperature using H 2 O 2 as an oxidant.

Synthesis of α‐Aminonitriles and 5‐Substituted 1H‐Tetrazoles Using an Efficient Nanocatalyst of Fe3O4@SiO2–APTES‐supported Trifluoroacetic Acid

“…A comparison study between the current method using Fe 3 O 4 @SiO 2 -APTES-TFA and the previously reported results [31][32][33][34][35][36][37][38] is summarized in Table 4. The results show that this method has a comparable result in terms of yield and reaction time, and fast recycling of the catalyst from the reaction medium (using a magnetic field) without the need for tedious and energy-consuming filtration and centrifugation, which can be seen in the reported catalytic systems in the Table S1.…”

Catalytic Selective Oxidation of Primary and Secondary Alcohols Using Nonheme [Iron(III)(Pyridine‐Containing Ligand)] Complexes

“…This reaction has been widely studied in recent years, but good results with high selectivities were obtained mainly with heterogeneous catalysts. [8,30] The lack of good homogeneous catalysts capable of yielding selectively benzaldehyde in such a reaction prompted us to test our iron(III) complexes 3a-b, choosing as a starting point the conditions very close to what we have already recently reported for the epoxidation/dihydroxylation reaction of alkenes. Reactions were performed by adding the catalyst and the benzyl alcohol to the solvent and then the oxidant (H 2 O 2 , 30 %) by slow addition with a syringe pump or by repeated single additions.…”

Gallic acid grafted to amine‐functionalized magnetic nanoparticles as a proficient catalyst for environmentally friendly synthesis of α‐aminonitriles

“…The pattern reaction was carried out with the best yield using Fe 3 O 4 @SiO 2 -NH 2 -GA as a catalyst in comparison with gained catalysts from previous fabrication levels ( Table 1, entries 1-4; see also results of some reported procedures for further comparisonentries 6-9). Solvent screening revealed that the reaction performed well in EtOH compared with other suggested solvents with different polarities under identical conditions (entries 5 and [11][12][13][14]. To find the best reaction conditions, a set of experiments was carried out by changing the catalyst amount.…”

“…Regarding the various usages of αaminonitriles in preparing wide-varied amino acids, amides, diamines and nitrogen-containing heterocycles, profound impact of these important substances can be recognized. [4][5][6] An innumerable number of acidcatalyzed Strecker reactions, including homogeneous Lewis acids, [7][8][9] heterogeneous Lewis acids [10,11] and also heterogeneous Brønsted acids [12,13] were reported.…”