Optimizing Multivariate Metal–Organic Frameworks for Efficient C2H2/CO2 Separation

Fan, Weidong; Yuan, Shuai; Wang, Wenjing; Feng, Liang; Liu, Xiuping; Zhang, Xiurong; Wang, Xia; Kang, Zixi; Dai, Fang; Yuan, Daqiang; Sun, Daofeng; Zhou, Hong‐Cai

doi:10.1021/jacs.0c00805

Cited by 303 publications

(215 citation statements)

References 50 publications

(62 reference statements)

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“…This is comparable to [Cd 2 L(H 2 O)] (42.9) 34 and exceeded by only one other reported material (SIFSIX-14-Cu-i, 85) (Supplementary Table 10) 35 . Typical physisorbents show a preference for unsaturated hydrocarbons over CO 2 , especially when bonding between the guest's π electrons and open metal sites can occur 25,[36][37][38][39][40][41][42][43][44][45][46][47][48][49][50] . However, MUF-16 exhibits a uniform preference for CO 2 over all C2 and C3 hydrocarbons at 293 K and 1 bar (Table 1).…”

Section: Resultsmentioning

confidence: 99%

Selective capture of carbon dioxide from hydrocarbons using a metal-organic framework

2021

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Efficient and sustainable methods for carbon dioxide capture are highly sought after. Mature technologies involve chemical reactions that absorb CO2, but they have many drawbacks. Energy-efficient alternatives may be realised by porous physisorbents with void spaces that are complementary in size and electrostatic potential to molecular CO2. Here, we present a robust, recyclable and inexpensive adsorbent termed MUF-16. This metal-organic framework captures CO2 with a high affinity in its one-dimensional channels, as determined by adsorption isotherms, X-ray crystallography and density-functional theory calculations. Its low affinity for other competing gases delivers high selectivity for the adsorption of CO2 over methane, acetylene, ethylene, ethane, propylene and propane. For equimolar mixtures of CO2/CH4 and CO2/C2H2, the selectivity is 6690 and 510, respectively. Breakthrough gas separations under dynamic conditions benefit from short time lags in the elution of the weakly-adsorbed component to deliver high-purity hydrocarbon products, including pure methane and acetylene.

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Section: Resultsmentioning

confidence: 99%

Selective capture of carbon dioxide from hydrocarbons using a metal-organic framework

2021

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“… 58 − 61 Postsynthetic approaches for precisely altering the pore environment of MOFs have also been utilized and have demonstrated excellent synthetic control. 62 − 70 One of the first postsynthetic methods for creating hierarchal pores used molecules to etch away either MOF SBUs or linkers and create mesopores within the structure. 71 − 73 In one example, Kim and co-workers use hydrolysis to partially degrade SBUs in an Y 3+ -based MOF.…”

Section: Covalent Postsynthetic Modification For the Synthesis Of Hiementioning

confidence: 99%

Postsynthetic Modification: An Enabling Technology for the Advancement of Metal–Organic Frameworks

2020

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Metal–organic frameworks (MOFs) are a class of porous materials with immense chemical tunability derived from their organic and inorganic building blocks. Presynthetic approaches have been used to construct tailor-made MOFs, but with a rather restricted functional group scope limited by the typical MOF solvothermal synthesis conditions. Postsynthetic modification (PSM) of MOFs has matured into an alternative strategy to broaden the functional group scope of MOFs. PSM has many incarnations, but two main avenues include (1) covalent PSM, in which the organic linkers of the MOF are modified with a reagent resulting in new functional groups, and (2) coordinative PSM, where organic molecules containing metal ligating groups are introduced onto the inorganic secondary building units (SBUs) of the MOF. These methods have evolved from simple efforts to modifying MOFs to demonstrate proof-of-concept, to becoming key synthetic tools for advancing MOFs for a range of emerging applications, including selective gas sorption, catalysis, and drug delivery. Moreover, both covalent and coordinative PSM have been used to create hierarchal MOFs, MOF-based porous liquids, and other unusual MOF materials. This Outlook highlights recent reports that have extended the scope of PSM in MOFs, some seminal reports that have contributed to the advancement of PSM in MOFs, and our view on future directions of the field.

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“…Over the past years, through the powerful strategy of pore regulation and functionalization, many MOF have been createdt ot arget various gas separation and purificationa pplications. [11][12][13][14][15][16] The direct incorporation of functional sites/groups on pore surface through designing ligandi sa ne asily operated methodf or pore functionalization, whiche ffectively enhances the capture capacity of C 2 H 2 and separation selectivity.S ome MOFs with functional sites, such as N, Sa nd Fs ites have achievede nhanced C 2 H 2 -framework interactions, [17][18][19][20][21][22] providingt he currently reportedb aseline separation selectivity.…”

Section: Introductionmentioning

confidence: 99%

New Supercage Metal–Organic Framework Based on Allopurinol Ligands Showing Acetylene Storage and Separation

Wang

Yang

et al. 2020

Chemistry A European J

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To develop efficienta dsorbent materials for storage and separation of C 2 H 2 ,a nu nprecedented supercage MOF,[ Me 2 NH 2 ]•[Zn 3 (ALP)(TDC) 2.5 ]•3.5DMF•2 H 2 O(1)w as constructedt hrough medicinal molecule allopurinol (ALP) and S-containing 2,5-thiophenedicarboxylica cid (H 2 TDC). 1 contains an ovel linear trinuclearc luster that is composed by ALP and carboxylates and forms af inal uncommon 5-connected yfy topologicalf ramework. The framework possesses three types of interlinked cages decorated by rich functional sites, and reveals not only high adsorption capacity for C 2 H 2 but also excellent selective separation forC 2 H 2 /CO 2 and C 2 H 2 /CH 4 at 298 K. Dynamic breakthrough experiments on C 2 H 2 /CO 2 (1:1) mixture and C 2 H 2 /CH 4 (1:1) mixture also demonstrated the potential of the materialt os eparate C 2 H 2 from CO 2 or CH 4 mixtures. Molecular simulations were also studied to identify the different CO 2-a nd C 2 H 2-b inding sites in 1,s uch as carboxylate groups, Sa toms and carbonyl groups.

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Optimizing Multivariate Metal–Organic Frameworks for Efficient C₂H₂/CO₂ Separation

Cited by 303 publications

References 50 publications

Selective capture of carbon dioxide from hydrocarbons using a metal-organic framework

Selective capture of carbon dioxide from hydrocarbons using a metal-organic framework

Postsynthetic Modification: An Enabling Technology for the Advancement of Metal–Organic Frameworks

New Supercage Metal–Organic Framework Based on Allopurinol Ligands Showing Acetylene Storage and Separation

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