Ammonia adsorption and its effects on framework stability of MOF-5 and MOF-177

Saha, Dipendu; Deng, Shuguang

doi:10.1016/j.jcis.2010.04.078

Cited by 203 publications

(144 citation statements)

References 30 publications

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“…The recovery of an organic linker, mainly carboxylic acid, during the degradation of MOFs has been reported a few times. [29,31,33,43] The porosity of V-BDC is very poor even though the structure is not completely destroyed to a soluble species. It is also remarkable to note that there is little change in the XRD pattern (including intensity) of the V-BDC after 1 h ( Figures S3 and S4 of Supporting Information ).…”

Section: Wwwchemeurjorgmentioning

confidence: 99%

“…[32] MOF-5 and MOF-177 decompose with ammonia adsorption, and free organic ligands are generated with ammonia by forming hydrogen bonds to Zn 4 O clusters. [33] We have selected isotypic metal benzenedicarboxylates (M-BDCs: that is, MIL-53-Al (Al-BDC), [34] MIL-53-Cr (Cr-BDC) [35] and MIL-47-V (V-BDC) [36] ; MIL stands for Material of Institut Lavoisier) as typical MOF materials. The three M-BDCs are well-known for their isotypic structure [18] with different metal ions.…”

Section: Introductionmentioning

confidence: 99%

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Chemical and Thermal Stability of Isotypic Metal–Organic Frameworks: Effect of Metal Ions

Kang

Khan

Haque

et al. 2011

Chemistry A European J

281

174

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Chemical and thermal stabilities of isotypic metal-organic frameworks (MOFs) like Al-BDC (Al-benzenedicarboxylate called MIL-53-Al), Cr-BDC (MIL-53-Cr) and V-BDC (MIL-47-V), after purification to remove uncoordinated organic linkers, have been compared to understand the effect of the central metal ions on the stabilities of the porous MOF-type materials. Chemical stability to acids, bases, and water decreases in the order of Cr-BDC>Al-BDC>V-BDC, suggesting stability increases with increasing inertness of the central metal ions. However, thermal stability decreases in the order of Al-BDC>Cr-BDC> V-BDC, and this tendency may be explained by the strength of the metal-oxygen bond in common oxides like Al(2)O(3), Cr(2)O(3), and V(2)O(5). In order to evaluate precisely the stability of a MOF, it is necessary to remove uncoordinated organic linkers that are located in the pores of the MOF, because a filled MOF may be more stable than the same MOF after purification.

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Section: Wwwchemeurjorgmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Chemical and Thermal Stability of Isotypic Metal–Organic Frameworks: Effect of Metal Ions

Kang

Khan

Haque

et al. 2011

Chemistry A European J

281

174

View full text Add to dashboard Cite

show abstract

“…Metal organic frameworks (MOFs), composed of organic ligands and transition metal atoms or clusters, have recently been expanding into a wide range of applications due to their structures containing large vacancies and peculiar chemical environments; these applications include gas storage, separation, and catalysis [1][2][3][4]. The variety of metals and organic ligands, as well as the way in which they are combined, provide various MOFs with different pore structures and chemical properties.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of pyridine onto the metal organic framework MIL-101

Kim

Park

Song

et al. 2011

Journal of Colloid and Interface Science

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“…The strong vibration peak at 1689 cm -1 in spectrum (9) could be ascribed to the stretching vibration of carboxylate anions present in H 2 BDC [13,23]. The asymmetric stretching of carboxylate group of BDC in MOF-5 appeared at 1604 cm -1 [24,25], and the symmetric stretching of BDC in MOF-5 showed at 1391 cm -1 [24,26] in spectrum (7). At the same circumstance, spectra (3), (4), (5) and (6) also exhibited the asymmetric and symmetric stretching vibration at corresponding positions.…”

Section: Xrd Pattern Of As-synthesized Catalystsmentioning

confidence: 96%

Synthesis of magnetically recyclable MOF-5@SiO2@Fe3O4 catalysts and their catalytic performance of Friedel–Crafts alkylation

Jiang

et al. 2015

J Porous Mater

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Magnetic Fe 3 O 4 particles were synthesized by solvo-thermal method, and then hydrolysis method was used to encapsulate a compact layer of SiO 2 on the surface of Fe 3 O 4 particles. Finally, the magnetic MOF5@SiO 2 @Fe 3 O 4 catalysts were prepared by in situ coating different contents of MOF-5 on the surface of SiO 2 @Fe 3 O 4 particles. The as-synthesized samples were characterized by TEM, SEM, XRD, FT-IR, N 2 adsorption/desorption, VSM and NH 3 -TPD. The catalytic activities of the magnetic MOF-5@SiO 2 @Fe 3 O 4 catalysts for the FriedelCrafts alkylation of toluene with benzyl chloride were evaluated. The results showed that magnetic MOF5@SiO 2 @Fe 3 O 4 catalysts exhibited superparamagnetic property, and could be separated by a magnet from the liquid reaction system. The conversion of toluene was increased gradually with the increase of catalyst contents and reaction temperature, respectively. 97 % conversion of toluene has been achieved by using 26.8 %MOF-5@SiO 2 @Fe 3 O 4 catalyst at 120°C for 6 h. Furthermore, electron-donating group, such as -OCH 3 , and -CH 3 , exhibited positive effect on the alkylation reaction. Besides, the catalyst could be easily separated from the reaction mixture after the reaction and reused for five times without significant decrease in activity.

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Ammonia adsorption and its effects on framework stability of MOF-5 and MOF-177

Cited by 203 publications

References 30 publications

Chemical and Thermal Stability of Isotypic Metal–Organic Frameworks: Effect of Metal Ions

Chemical and Thermal Stability of Isotypic Metal–Organic Frameworks: Effect of Metal Ions

Adsorption of pyridine onto the metal organic framework MIL-101

Synthesis of magnetically recyclable MOF-5@SiO2@Fe3O4 catalysts and their catalytic performance of Friedel–Crafts alkylation

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