When long bis(pyrazolates) meet late transition metals: structure, stability and adsorption of metal–organic frameworks featuring large parallel channels

Galli, Simona; Maspero, Angelo; Giacobbe, Carlotta; Palmisano, Giovanni; Nardo, Luca; Comotti, Angiolina; Bassanetti, Irene; Sozzani, Piero; Masciocchi, Norberto

doi:10.1039/c4ta01798f

Cited by 55 publications

(51 citation statements)

References 48 publications

(18 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[50][51][52][53][54][55][56] Moreover, MOF nanocrystals which can be obtained via solvothermal, [104] microwave, [105] ultrasound, [106] electrodeposition, [107] slow diffusion methods [108] or others [109,110] are also highly desirable. And as discussed in the "Discussion" part, suggested choices for water purification can be water stable MOF materials with potential interactions.…”

Section: Synthesis Regeneration and Reuse Of Adsorbentsmentioning

confidence: 99%

Water Purification: Adsorption over Metal‐Organic Frameworks

et al. 2016

View full text Add to dashboard Cite

Water pollution relating to human beings' health is a universal problem across community society. Highly efficient, economically feasible and easily achievable approaches are long-sought-after for water purification. Adsorption processes with porous materials (e.g. zeolites, activated carbon, silica gel, metal-organic frameworks (MOFs)) have drawn much attention in this field during past decades. In it, MOFs with numerous active sites, uniform porosity and tailorable structure diversity are arising to be one of the most promising adsorbents for water purification. During the adsorption processes, influence factors that determine or affect the usability and performances of MOFs are mainly focused on the stability of MOFs, their affinity for contaminants and the conducting conditions (pH, initial concentration of the contaminants). In this review, we will systematically present the performances of MOFs (mainly focused on MOF crystals, MOF nanomaterial or MOF composites will be beyond the scope of this review) for contaminants purification (inorganic and organic contaminants) in water and give a detailed discussion about the connection among their performances, conducting condition factors and potential interaction mechanisms (e.g. electrostatic interactions, coordination or p-p interaction). We hope this review will be beneficial to the design, regeneration and reuse of MOF adsorbents and promote the development of MOFs for water purification.

show abstract

Section: Synthesis Regeneration and Reuse Of Adsorbentsmentioning

confidence: 99%

Water Purification: Adsorption over Metal‐Organic Frameworks

et al. 2016

View full text Add to dashboard Cite

show abstract

“…This could be realized either by the use of ligands with ah igher pK a than carboxylate,such as azolate derivatives or/and highly charged M n cations (especially n ! [22,25] Oxygenated ligands,s uch as phosphonates [26,27] or the more basic phenolates thus appear appealing alternatives,a lthough the control of the porosity could be achallenge.T odate,afew open frameworks M II [28][29][30][31][32][33][34][35] and one Ti IV [36] carboxyphenolates or phenolates have been described. [6] Indeed, using highly charged cations has led to various carboxylate-based MOFs showing remarkable stability.N otably,Z r IV -based MOFs,b uilt up either from Zr 6 oxo/hydroxo clusters (UiO-66s,P CN-222,…) [7][8][9][10][11][12][13][14][15][16] or Zr oxide chains (MIL-140s), [17,18] fall into this category.I na ddition, the use of azolate derivatives has also yielded chemically stable MOFs,e specially M II imidazolates (ZIF-8,…) [19] and pyrazolates.…”

mentioning

confidence: 99%

A Robust Infinite Zirconium Phenolate Building Unit to Enhance the Chemical Stability of Zr MOFs

et al. 2015

View full text Add to dashboard Cite

show abstract

“…The values found for Zn‐BPZNO 2 (4.95 and 4.40 mmol g −1 at p =1.2 and 1 bar, respectively) are remarkably high, falling among the best values reported so far in the literature for other poly(pyrazolate)‐containing MOFs under similar experimental conditions (see Table S1). Higher CO 2 adsorption values (between 5.2 and 9.2 mmol g −1 ) were reported only for MOFs containing the long and rigid bis‐pyrazolate H 2 BPEB spacer [H 2 BPEB=1,4‐bis(1 H ‐pyrazol‐4‐ylethynyl)benzene] . As Zn‐BPZ adsorbs 4.4 mmol g −1 at the lower temperature of 273 K (whereas Zn‐BPZNO 2 adsorbs 4.7 mmol g −1 at the same temperature), the presence of a nitro group on the skeleton of BPZ 2− does favor CO 2 adsorption, which suggests the insurgence of dipole–quadrupole interactions between NO 2 and CO 2 , as previously pointed out by theoretical calculations among supercritical CO 2 and organic compounds with oxygen‐containing functional groups …”

Section: Resultsmentioning

confidence: 99%

“…The MOFs were tested as CO 2 [42] As Zn-BPZ adsorbs 4.4 mmol g À1 at the lower temperature of 273 K [33] (whereas Zn-BPZNO 2 adsorbs 4.7mmol g À1 at the same temperature), the presence of an itro group on the skeleton of BPZ 2À does favor CO 2 adsorption, whichs uggests the insurgence of dipole-quadrupole interactions between NO 2 and CO 2 ,a sp reviously pointedo ut by theoretical calculations among supercritical CO 2 and organic compounds with oxygen-containing functional groups. [43] To the best of our knowledge, Zn-BPZNO 2 and Co-BPZNO 2 outperform all the literature examples of MOFs bearing the nitro group as au nique tag (Table 2), as they show the highest CO 2 uptakev alues under ambient conditions within this group of MOFs.…”

Section: Co 2 Adsorptionmentioning

confidence: 99%

Nitro‐Functionalized Bis(pyrazolate) Metal–Organic Frameworks as Carbon Dioxide Capture Materials under Ambient Conditions

Mosca

Vismara

Fernandes

et al. 2018

Chemistry A European J

View full text Add to dashboard Cite

The metal-organic frameworks (MOFs) M(BPZNO ) (M=Co, Cu, Zn; H BPZNO =3-nitro-4,4'-bipyrazole) were prepared through solvothermal routes and were fully investigated in the solid state. They showed good thermal stability both under a N atmosphere and in air, with decomposition temperatures peaking up to 663 K for Zn(BPZNO ). Their crystal structure is characterized by 3D networks with square (M=Co, Zn) or rhombic (M=Cu) channels decorated by polar NO groups. As revealed by N adsorption at 77 K, they are micro-mesoporous materials with BET specific surface areas ranging from 400 to 900 m g . Remarkably, under the mild conditions of 298 K and 1.2 bar, Zn(BPZNO ) adsorbs 21.8 wt % CO (4.95 mmol g ). It shows a Henry CO /N selectivity of 15 and an ideal adsorbed solution theory (IAST) selectivity of 12 at p=1 bar. As a CO adsorbent, this compound is the best-performing MOF to date among those bearing a nitro group as a unique chemical tag. High-resolution powder X-ray diffraction at 298 K and different CO loadings revealed, for the first time in a NO -functionalized MOF, the insurgence of primary host-guest interactions involving the C(3)-NO moiety of the framework and the oxygen atoms of carbon dioxide, as confirmed by Grand Canonical Monte Carlo simulations. This interaction mode is markedly different from that observed in NH -functionalized MOFs, for which the carbon atom of CO is involved.

show abstract

When long bis(pyrazolates) meet late transition metals: structure, stability and adsorption of metal–organic frameworks featuring large parallel channels

Cited by 55 publications

References 48 publications

Water Purification: Adsorption over Metal‐Organic Frameworks

Water Purification: Adsorption over Metal‐Organic Frameworks

A Robust Infinite Zirconium Phenolate Building Unit to Enhance the Chemical Stability of Zr MOFs

Nitro‐Functionalized Bis(pyrazolate) Metal–Organic Frameworks as Carbon Dioxide Capture Materials under Ambient Conditions

Contact Info

Product

Resources

About