Formic acid modulated (fam) aluminium fumarate MOF for improved isotherms and kinetics with water adsorption: Cooling/heat pump applications

Teo, How Wei Benjamin; Chakraborty, Anutosh; Kayal, Sibnath

doi:10.1016/j.micromeso.2018.06.016

Cited by 54 publications

(39 citation statements)

References 29 publications

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“…On the contrary, fluoride coordination to aluminium is fully compatible with the substitution of hydroxy groups in the framework since both anions are monodentate, have analogous size, and feature same charge and number of valence electron pairs (Scheme b). For similar reasons, until now the use of short‐chain monocarboxylic acids as synthesis modulators for Al‐MIL‐53 as well as for other Al‐MOFs focused on taking advantage of their tendency for linker replacement to hamper the growth of specific crystal facets, reduce the mean crystal size, and introduce structural defects to modify the MOF's porosity …”

Section: Resultsmentioning

confidence: 99%

Overcoming Crystallinity Limitations of Aluminium Metal‐Organic Frameworks by Oxalic Acid Modulated Synthesis

Canossa

Gonzalez-Nelson

Shupletsov

et al. 2020

Chemistry A European J

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A modulated synthesis approach based on the chelating properties of oxalic acid (H2C2O4) is presented as a robust and versatile method to achieve highly crystalline Al‐based metal‐organic frameworks. A comparative study on this method and the already established modulation by hydrofluoric acid was conducted using MIL‐53 as test system. The superior performance of oxalic acid modulation in terms of crystallinity and absence of undesired impurities is explained by assessing the coordination modes of the two modulators and the structural features of the product. The validity of our approach was confirmed for a diverse set of Al‐MOFs, namely X‐MIL‐53 (X=OH, CH3O, Br, NO2), CAU‐10, MIL‐69, and Al(OH)ndc (ndc=1,4‐naphtalenedicarboxylate), highlighting the potential benefits of extending the use of this modulator to other coordination materials.

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Section: Resultsmentioning

confidence: 99%

Overcoming Crystallinity Limitations of Aluminium Metal‐Organic Frameworks by Oxalic Acid Modulated Synthesis

Canossa

Gonzalez-Nelson

Shupletsov

et al. 2020

Chemistry A European J

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“…The structure of a MOF can be modulated by employing various organic bridge or metal ions to achieve the targeted pore size and adsorption characteristics. Moreover, directional control, design, and modification and the regulation of its structure and properties can be realized by changing the organic ligands in the coordination process [ 15 , 16 ]. Familiar multidentate ligands are multicomponent organic carboxylic acids (aliphatic carboxylic acids and aromatic carboxylic acids) and partial organic nitric heterocyclic compounds (pyridine, imidazole, pyrazole, etc.)…”

Section: Introductionmentioning

confidence: 99%

Ligands-Coordinated Zr-Based MOF for Wastewater Treatment

Tsai

Xie

et al. 2018

Nanomaterials

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Isostructural zirconium-based metal–organic frameworks (Zr-MOFs) have attracted the attention of researchers because of their remarkable stability at high temperatures and high pressures and their chemical stabilities against acids and bases. Due to this stability, Zr-MOFs can be utilized in adsorption research, and the adsorption performance of a Zr-MOF depends on the pore size and the surroundings of the MOF. In this study, as the dimensions changed and the adsorption was carried out, the Zr-MOF material remained stable, and the adsorption of the best state was achieved at 235 mg/g. Through the simulation of theoretical kinetic models of Zr-MOFs, we initially postulated that the adsorption capacity is proportional to the pore size and that acid orange 7 (AO7) was adsorbed by the MOFs. Afterwards, we verified our hypotheses through a series of Brunauer–Emmett–Teller (BET) data analysis; non-local density function theory (NLDFT) was mainly used to analyze the data. Moreover, we determined that physical adsorption occurs on the surface of the MOFs during the adsorption process, while chemisorption occurs in the form of dye molecules combining with active sites. Ultimately, we concluded that the larger the pore size, the stronger the adsorption capacity, and this contribution casts a new light on the issue of wastewater treatment.

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“…For similarr easons, until now the use of short-chain monocarboxylic acids as synthesis modulators for Al-MIL-53 as well as for other Al-MOFs focusedo n taking advantage of their tendency for linker replacement [44] to hamper the growth of specific crystal facets, [45,46] reduce the mean crystal size, [30] and introduce structural defects to modify the MOF's porosity. [29,47] The benefits of oxalic acid modulation are not limited to MIL-53, as they were also observed for its analogues with OH-, CH 3 O-, Br-, and NO 2 -functionalised linkers. These MOFs were synthesized using 0.5, 1, and 1.5 oxalic acid:Al ratios to study how the amount of modulator affects the crystallinity of the products.I na ll the studied systems, oxalic acid leads to an increasedc rystal size with respectt ot he unmodulated synthesis (Figure 2, Figures S9-S23).…”

Section: Resultsmentioning

confidence: 85%

“…[19][20][21] Importantly,i ncreasing the achievable crystal size of MOFs enables the detailedd escription of their structural features by single-crystal X-ray diffraction (SCXRD) and the investigation of functional properties of interest,s uch as mechanical response [22][23][24][25] and electronic behavior. [26][27][28] Monocarboxylate modulators, commonly used in MOF synthesis, have shown to lead to defectf ormation [29] and even decreasei nc rystal size. [30] To date, the only effective approacht hat has been reported for the synthesis of highly crys-tallineA l-MOFs is based on the use of hydrofluorica cid, [31][32][33][34] borrowing from its well-documented use as mineralizer to improve the crystallinity of microporousi norganic materials.…”

Section: Introductionmentioning

confidence: 99%

Overcoming Crystallinity Limitations of Aluminium Metal–Organic Frameworks by Oxalic Acid Modulated Synthesis

Canossa¹,

Gonzalez-Nelson

Shupletsov³

et al. 2019

Preprint

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Am odulateds ynthesis approach based on the chelating properties of oxalic acid (H 2 C 2 O 4 )i sp resented as a robust andv ersatile methodt oa chieveh ighly crystalline Albased metal-organic frameworks. Ac omparatives tudy on this method and the already established modulation by hydrofluoric acid was conducted using MIL-53 as test system. The superior performance of oxalic acid modulation in terms of crystallinity and absence of undesired impurities is ex-plained by assessing the coordination modes of the two modulators and the structural features of the product. The validity of our approach was confirmed for ad iverse set of Al-MOFs,n amely X-MIL-53 (X = OH, CH 3 O, Br,N O 2 ), CAU-10, MIL-69, andA l(OH)ndc (ndc = 1,4-naphtalenedicarboxylate), highlighting the potentialb enefits of extending the use of this modulator to other coordination materials.[a] Dr.[ + + ] These authors contributed equally.[**] Ap revious versiono ft his manuscript has been deposited on ap reprint server (https://doi.org/10.26434/chemrxiv.9999572.v1).Supporting information and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.org/10.Scheme2.The reaction formulas for MIL-53 synthesis modulated by oxalic acid (a) and hydrofluoric acid (b).

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Formic acid modulated (fam) aluminium fumarate MOF for improved isotherms and kinetics with water adsorption: Cooling/heat pump applications

Cited by 54 publications

References 29 publications

Overcoming Crystallinity Limitations of Aluminium Metal‐Organic Frameworks by Oxalic Acid Modulated Synthesis

Overcoming Crystallinity Limitations of Aluminium Metal‐Organic Frameworks by Oxalic Acid Modulated Synthesis

Ligands-Coordinated Zr-Based MOF for Wastewater Treatment

Overcoming Crystallinity Limitations of Aluminium Metal–Organic Frameworks by Oxalic Acid Modulated Synthesis

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