Heterogeneous selective oxidation catalysts based on coordination polymer MIL-101 and transition metal-substituted polyoxometalates

Maksimchuk, Nataliya V.; Timofeeva, Maria N.; Melgunov, M. S.; Shmakov, A. N.; Chesalov, Yu. A.; Dybtsev, Danil N.; Fedin, Vladimir P.; Kholdeeva, Oxana A.

doi:10.1016/j.jcat.2008.05.014

Cited by 361 publications

(217 citation statements)

References 22 publications

Supporting

Mentioning

209

Contrasting

Unclassified

Order By: Relevance

“…Co and Ti -monosubstituted Keggin heteropolyanions were inserted into the nanocages of Cr-MIL-101 99 . During the catalytic evaluation of the resulting POM@MOF materials, two types of oxidant were applied: O 2 for the Co-POM and H 2 O 2 for the Ti-POM (entry 15 Table 4).…”

Section: Pom@mofmentioning

confidence: 99%

See 1 more Smart Citation

Metal-Organic Frameworks as Selective or Chiral Oxidation Catalysts

2014

View full text Add to dashboard Cite

Since the discovery of Metal Organic Frameworks (MOFs) in the early 1990, the amount of new structures has grown exponentially. A MOF typically consists of inorganic nodes that are connected by organic linkers to form crystalline, highly porous structures. MOFs have attracted a lot of attention lately, as the versatile design of such materials holds promises of interesting applications in various fields. In this review, we will focus on the use of MOFs as heterogeneous oxidation catalysts. MOFs are very promising candidates to replace homogeneous catalysts by sustainable and stable heterogeneous catalysts. The catalytic active function can be either the active metal sites of the MOF itself or can be introduced as an extra functionality in the linker, a dopant or a "ship-in-a-bottle" complex. As the pore size, pore shape and functionality of MOFs can be designed in numerous ways, shape selectivity and even chiral selectivity can be created. In this review, we will present an overview on the state of the art of the use of MOFs as a heterogeneous catalyst in liquid phase oxidation reactions.

show abstract

Section: Pom@mofmentioning

confidence: 99%

“…In turn, the oxidation of caryophyllene mostly gave the epoxide product. The authors state that this could be due to the deprotonation of the Ti-POM during the encapsulation within the host matrix preventing the acid-sensitive epoxide for the ring opening reaction 99 .…”

Section: Pom@mofmentioning

confidence: 99%

Metal-Organic Frameworks as Selective or Chiral Oxidation Catalysts

2014

View full text Add to dashboard Cite

show abstract

“…Moreover, unlike traditional immobilized catalysts 9,10,11 , the active catalytic sites in MOFs are well protected by the coordination bonds which prevents leaching to a higher extent. Although the research in this field is relatively new, MOFs have been studied as catalysts in hydrogenation and oxidation reactions 12,13,14,15,16,17,18 enantioselective reactions 19,20,21 , photocatalysis 22 , carbonyl cyanosilylation 23,24,25 , hydrodesulfurization 26 and esterification 27 .…”

Section: Introductionmentioning

confidence: 99%

The coordinatively saturated vanadium MIL-47 as a low leaching heterogeneous catalyst in the oxidation of cyclohexene

Leus

Vandichel

Liu

et al. 2012

Journal of Catalysis

View full text Add to dashboard Cite

A Metal Organic Framework, containing coordinatively saturated V +IV sites linked together by terephthalic linkers (V-MIL-47) is evaluated as a catalyst in the epoxidation of cyclohexene. Different solvents and conditions are tested and compared. If the oxidant TBHP is dissolved in water, a significant leaching of V-species into the solution is observed and also radical pathways are 2 prominently operative leading to the formation of an adduct between the peroxide and cyclohexene. If however the oxidant is dissolved in decane, leaching is negligible and the structural integrity of the V-MIL-47 is maintained during successive runs. The selectivity towards the epoxide is very high in these circumstances. Extensive computational modelling is performed to show that several reaction cycles are possible. EPR and NMR measurements confirm that at least two parallel catalytic cycles are co-existing: one with V +IV sites and one with pre-oxidized V +V sites, and this in complete agreement with the theoretical predictions.

show abstract

“…However, the bands belonging to W-Oc-W split into a maximum at 826 cm -1 with a shoulder at 792 cm -1 , the bands at 983 cm -1 ascribed to W-Od shifted to smaller wavenumber and became insensitive.. This is because the H + of PTA connected with its anion Oc and Od,but the electrostatic interaction of PTA and -NH 2 led to the electron density of Oc and Od decreased [25]which contributed to the changes of absorption peak of the peak position and intensity. All catalysts have the same changes of W-Oc-W and W-Od absorption peak, which indicated that the grafting of -Cl does not affect the electrostatic interaction between PTA and -NH 2 .…”

Section: Resultsmentioning

confidence: 97%

Influence of Strong Electronegativity Groups -Cl as the Adsorption Center of PTA@MIL-101-NH²-Cl for the Selective Hydrolysis of Cellulose into Glucose

Han¹,

Wang²,

Wan³

et al. 2017

Proceedings of the 3rd 2017 International Conference on Sustainable Development (ICSD 2017)

View full text Add to dashboard Cite

Abstract. In this paper, the catalyst PTA@MIL-101-NH 2 -Cl with various 2, 5-dichloroterephthalic acid was synthesized. Based on this, the effect of the strong negative groups -Cl on the crystal structure, molecular structure and thermal stability of the catalyst was studied. It was found that the immobilization of -Cl did not affect the structure of the catalyst, and it can improve the thermal stability of the catalyst to a certain extent. The mechanism of -Cl as the cellulose adsorption center in the directional hydrolysis of cellulose were analyzed. The strong negative groups -Cl form hydrogen bonds with the hydroxyl of cellulose to selectively adsorb cellulose, weaken the molecular hydrogen bonds of cellulose molecules to reduce the difficulty of cellulose hydrolysis and improve its hydrolysis efficiency. The yield of glucose obtained by the hydrolysis of cellulose after grafting-Cl catalyst was 81% higher than that without -Cl.

show abstract

Heterogeneous selective oxidation catalysts based on coordination polymer MIL-101 and transition metal-substituted polyoxometalates

Cited by 361 publications

References 22 publications

Metal-Organic Frameworks as Selective or Chiral Oxidation Catalysts

Metal-Organic Frameworks as Selective or Chiral Oxidation Catalysts

The coordinatively saturated vanadium MIL-47 as a low leaching heterogeneous catalyst in the oxidation of cyclohexene

Influence of Strong Electronegativity Groups -Cl as the Adsorption Center of PTA@MIL-101-NH²-Cl for the Selective Hydrolysis of Cellulose into Glucose

Contact Info

Product

Resources

About