A rare Pb<sub>9</sub> cluster-organic framework constructed from a flexible cyclotriphosphazene-functionalized hexacarboxylate exhibiting selective gas separation

Bai, Dongjie; Chen, Fengli; Jiang, Donghao; He, Yabing

doi:10.1039/c7qi00289k

Cited by 37 publications

(20 citation statements)

References 74 publications

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“…For three gases, 1 displays the most loading for C 2 H 2 but the least loading for CH 4 (Figures 3b and c). The adsorption amounts for C 2 H 2 ,C O 2 and CH 4 under 1a tm are 96.6, 74.5 and 19.5 cm 3 g À1 at 273 K, and 68.6, 44.8 and 10.8 cm 3 g À1 at 298 K, respectively.T he amount of C 2 H 2 is comparable with the most reported valuesi nM OFs (Table S3), but much higher than those of ZJNU-62 [40] and (Me 2 NH 2 ) 2 [Zn 6 (TBAPy) 2 (Ade) 4 (m 4 -O)]. [41] The isosterich eato fa dsorption (Q st )f or 1 was calculated using the adsorption isothermso btained at 273 and 298 K ( Figures S8-10).…”

Section: Gas Sorptionsupporting

confidence: 84%

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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Section: Gas Sorptionsupporting

confidence: 84%

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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“…In specific, the Pb 9 clusters possess five different type of Pb ions (Pb1–Pb5). Both Pb1 and Pb4 ions are identified to exhibit the hexacoordination and Pb2 and Pb5 are noted be heptacoordination, whereas Pb3 is detected to show octacoordination [29] …”

Section: Cyclotriphosphazene Based Porous Coordination Polymersmentioning

confidence: 98%

“…Copy right 2018, Springer Nature. 213 ‐Reproduced with permission from Ref [29] . Copy right 2017, Royal Society of Chemistry.…”

Section: Cyclotriphosphazene Based Porous Coordination Polymersmentioning

confidence: 99%

“…Moreover, Bai et al ., have synthesized the novel haxacarboxyCTP ligands 189 – 192 for the design of various (Figure 15 and 16) new porous coordination polymers 213 – 217 [28,29] . The above coordination polymers can be suitable for gas adsorption applications.…”

Section: Cyclotriphosphazene Based Porous Coordination Polymersmentioning

confidence: 99%

“…The variation of substituents on phosphorous centres tends to tune the electronic properties of the entire molecule, which leads to the versatile coordination properties towards subsequent applications [11–17] . Indeed, CTP based metal clusters and coordination polymers are used in numerous applications such as catalyst, [18–23] antibacterial agents, [24,25] gas adsorption, [26–28] gas separation [29,30] and sensors [31–33] etc. In particular, the synthetic strategies executed with the simple molecule of N 3 P 3 Cl 6 can act as models for the extension of similar synthesis on the polymeric analogues, polyphosphazene [−N=P(Cl 2 )−] n .…”

Section: Introductionmentioning

confidence: 99%

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Multisite Coordination Ligands on Cyclotriphosphazene Core for the Assembly of Metal Clusters and Porous Coordination Polymers

et al. 2021

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In this review, we account the recent advancements on cyclotriphosphazene (N3P3Cl6) based multi‐site coordination ligands for the synthesis of multi‐metallic architectures. In case of N3P3Cl6, Phosphorous centres with two chlorides use to be bonded with nitrogen [−P(Cl2)=N−]3 at alternative positions in six membered ring to provide a robust planar structure to anchor the ligand arms with wide flexibility. Cyclic P−N robust motif is renowned as the potential support for the design of multi‐site ligands originating from phosphorus centres by viable substitution of variable number of ligand units (1 to 6) consist of one or more coordination site(s) via geminal and/or non‐geminal modes. Despite these phosphorus centres are promising to support in ligand structure, occasionally involve in coordination with transition metals as well. Three of alternative nitrogen atoms in this heterocyclic core are supposed to function as Lewis base centres while the electron releasing substituents occurred to tether on phosphorus centres, also when the resultant ring size favours adequate interaction towards the transition metal ions with respect to skeletal flexibility. The ligand modes vary with respect to numbers and orientation of coordination sites, which is imperative to enrich the ligation ability. Moreover, several examples of cyclotriphosphazene core ligands consist of the spacer oxygen atom while tethering with exocyclic ligand units to incorporate more flexibility. In accordance with coordination sites on ligand framework and choice of metal, the skeletal ring nitrogen atom(s) of the cyclotriphosphazene can be involved in coordination with metal ions. Indeed, the coordination of ligands is reported to coordinate with main group, transition and lanthanide metal ions to form variety of metal clusters and porous coordination polymers. Subsequently, the geometry of homo or heterometallic complexes with respect to versatile coordination modes of metallic complexes tends to afford inherent chemical properties for specific application. In terms of exocyclic ligands, the heterocyclic units such as pyridyloxy‐, pyrazolyl‐, pyridylalkylamino‐, bipyridyl‐, 1,10‐phenanthroline, porphyrinato, hydrazide, hydrazone, Schiff's base and spirocyclic amine units attached to cyclotriphosphazene were exploited to form series of metal complexes. Similarly, the variety of metal clusters, polymeric network (1D to 3D) and porous coordination polymers have been reported on basis of cyclic core molecule substituted with ligand units, pyridyloxy‐, multi‐carboxylic, aromatic amines substituted pyridyloxy‐ and imidazole moiety involved to form variety of products.

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Metal–Organic Frameworks for CO₂ Separation from Flue and Biogas Mixtures

Sahoo

Mondal

Mukherjee

et al. 2022

Adv Funct Materials

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Great efforts have been made toward the separation of CO 2 from flue gas and biogas to mitigate environmental pollution and the demand for renewable fuels, respectively. Nonthermal-based separations, such as adsorption-based or membrane-separation technology employing porous materials, are considered to be more promising than traditional cryogenic and absorption-based systems. Due to several advantages of metal-organic frameworks (MOFs) over other conventional porous materials, reports on flue and biogas separation by MOFs are burgeoning (423 for adsorption and 56 for membrane-based separations until June 2021) and demand urgent summarization. This review presents a bird's eye view on such separations while organizing the developed strategies and considering several performance parameters, such as tradeoff between sorption capacity and separation selectivity in adsorption-based systems and permeability versus separation selectivity in membrane-based systems. In addition, the mechanisms involving such separations at the molecular level are presented. A critical discussion section offers more crucial insights into these materials from industrial deployment viewpoints. Finally, future recommendations are made for further developments of MOF materials as flue and biogas separators and thus toward solving both the challenging universal problems of global warming and energy scarcity simultaneously.

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A rare Pb₉ cluster-organic framework constructed from a flexible cyclotriphosphazene-functionalized hexacarboxylate exhibiting selective gas separation

Abstract: A rare Pb9 cluster-based organic framework constructed from a flexible cyclotriphosphazene-functionalized hexacarboxylate exhibits selective adsorption separation of C2 hydrocarbons and CO2 from CH4 under ambient conditions.

Cited by 37 publications

References 74 publications

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

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

Multisite Coordination Ligands on Cyclotriphosphazene Core for the Assembly of Metal Clusters and Porous Coordination Polymers

Metal–Organic Frameworks for CO₂ Separation from Flue and Biogas Mixtures

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A rare Pb9 cluster-organic framework constructed from a flexible cyclotriphosphazene-functionalized hexacarboxylate exhibiting selective gas separation

Abstract: A rare Pb9 cluster-based organic framework constructed from a flexible cyclotriphosphazene-functionalized hexacarboxylate exhibits selective adsorption separation of C2 hydrocarbons and CO2 from CH4 under ambient conditions.

Cited by 37 publications

References 74 publications

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

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

Multisite Coordination Ligands on Cyclotriphosphazene Core for the Assembly of Metal Clusters and Porous Coordination Polymers

Metal–Organic Frameworks for CO2 Separation from Flue and Biogas Mixtures

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A rare Pb₉ cluster-organic framework constructed from a flexible cyclotriphosphazene-functionalized hexacarboxylate exhibiting selective gas separation

Metal–Organic Frameworks for CO₂ Separation from Flue and Biogas Mixtures