7 research outputs found
Yb(OTf)<sub>3</sub>‑Mediated Access to Furans from β‑Ketothioamides via Eschenmoser Sulfide Contraction Reaction
A mild and straightforward synthetic
protocol for construction
of a furan skeleton promoted by YbÂ(OTf)<sub>3</sub> from β-ketothioamides
and arylglyoxals has been developed at room temperature. Importantly,
this protocol involves a tandem sequence that includes aldol condensation,
N-cyclization, ring opening, O-cyclization, S-cyclization, and Eschenmoser
sulfide contraction
Tuning Water Sorption in Highly Stable Zr(IV)-Metal–Organic Frameworks through Local Functionalization of Metal Clusters
Water
adsorption of metal–organic frameworks (MOFs) is attracting
intense interest because of their potential applications in atmospheric
water harvesting, dehumidification, and adsorption-based heating and
cooling. In this work, through using a hexacarboxylate ligand, four
new isostructural ZrÂ(IV)-MOFs (BUT-46F, -46A, -46W, and -46B) with
rare low-symmetric 9-connected Zr<sub>6</sub> clusters were synthesized
and structurally characterized. These MOFs are highly stable in water,
HCl aqueous solution (pH = 1), and NaOH aqueous solution (pH = 10)
at room temperature, as well as in boiling water. Interestingly, the
rational modification of the metal clusters in these MOFs with different
functional groups (HCOO<sup>–</sup>, CH<sub>3</sub>COO<sup>–</sup>, H<sub>2</sub>O/OH, and PhCOO<sup>–</sup>)
enables the precise tuning of their water adsorption properties, which
is quite important for given application. Furthermore, all four MOFs
show excellent regenerability under mild conditions and good cyclic
performance in water adsorption
Tuning Water Sorption in Highly Stable Zr(IV)-Metal–Organic Frameworks through Local Functionalization of Metal Clusters
Water
adsorption of metal–organic frameworks (MOFs) is attracting
intense interest because of their potential applications in atmospheric
water harvesting, dehumidification, and adsorption-based heating and
cooling. In this work, through using a hexacarboxylate ligand, four
new isostructural ZrÂ(IV)-MOFs (BUT-46F, -46A, -46W, and -46B) with
rare low-symmetric 9-connected Zr<sub>6</sub> clusters were synthesized
and structurally characterized. These MOFs are highly stable in water,
HCl aqueous solution (pH = 1), and NaOH aqueous solution (pH = 10)
at room temperature, as well as in boiling water. Interestingly, the
rational modification of the metal clusters in these MOFs with different
functional groups (HCOO<sup>–</sup>, CH<sub>3</sub>COO<sup>–</sup>, H<sub>2</sub>O/OH, and PhCOO<sup>–</sup>)
enables the precise tuning of their water adsorption properties, which
is quite important for given application. Furthermore, all four MOFs
show excellent regenerability under mild conditions and good cyclic
performance in water adsorption
Tuning Water Sorption in Highly Stable Zr(IV)-Metal–Organic Frameworks through Local Functionalization of Metal Clusters
Water
adsorption of metal–organic frameworks (MOFs) is attracting
intense interest because of their potential applications in atmospheric
water harvesting, dehumidification, and adsorption-based heating and
cooling. In this work, through using a hexacarboxylate ligand, four
new isostructural ZrÂ(IV)-MOFs (BUT-46F, -46A, -46W, and -46B) with
rare low-symmetric 9-connected Zr<sub>6</sub> clusters were synthesized
and structurally characterized. These MOFs are highly stable in water,
HCl aqueous solution (pH = 1), and NaOH aqueous solution (pH = 10)
at room temperature, as well as in boiling water. Interestingly, the
rational modification of the metal clusters in these MOFs with different
functional groups (HCOO<sup>–</sup>, CH<sub>3</sub>COO<sup>–</sup>, H<sub>2</sub>O/OH, and PhCOO<sup>–</sup>)
enables the precise tuning of their water adsorption properties, which
is quite important for given application. Furthermore, all four MOFs
show excellent regenerability under mild conditions and good cyclic
performance in water adsorption
Tuning Water Sorption in Highly Stable Zr(IV)-Metal–Organic Frameworks through Local Functionalization of Metal Clusters
Water
adsorption of metal–organic frameworks (MOFs) is attracting
intense interest because of their potential applications in atmospheric
water harvesting, dehumidification, and adsorption-based heating and
cooling. In this work, through using a hexacarboxylate ligand, four
new isostructural ZrÂ(IV)-MOFs (BUT-46F, -46A, -46W, and -46B) with
rare low-symmetric 9-connected Zr<sub>6</sub> clusters were synthesized
and structurally characterized. These MOFs are highly stable in water,
HCl aqueous solution (pH = 1), and NaOH aqueous solution (pH = 10)
at room temperature, as well as in boiling water. Interestingly, the
rational modification of the metal clusters in these MOFs with different
functional groups (HCOO<sup>–</sup>, CH<sub>3</sub>COO<sup>–</sup>, H<sub>2</sub>O/OH, and PhCOO<sup>–</sup>)
enables the precise tuning of their water adsorption properties, which
is quite important for given application. Furthermore, all four MOFs
show excellent regenerability under mild conditions and good cyclic
performance in water adsorption
Zr(IV)-Based Metal-Organic Framework with T‑Shaped Ligand: Unique Structure, High Stability, Selective Detection, and Rapid Adsorption of Cr<sub>2</sub>O<sub>7</sub><sup>2–</sup> in Water
Dichromate
is known for severe health impairments to organisms.
New and valid strategies have been developed to rapidly detect and
efficiently remove this pollutant. Constructing stable luminescent
metal-organic frameworks (MOFs) for dichromate recognition and removal
from aqueous solution could provide a feasible resolution to this
problem. Herein, a new luminescent ZrÂ(IV)-MOF, Zr<sub>6</sub>O<sub>4</sub>(OH)<sub>7</sub>(H<sub>2</sub>O)<sub>3</sub>(BTBA)<sub>3</sub> (BUT-39, BUT = Beijing University of Technology) was constructed
through the reaction of a newly designed functionalized T-shaped ligand
4,4′,4″-(1<i>H</i>-benzoÂ[<i>d</i>]Âimidazole-2,4,7-triyl)Âtribenzoic acid (H<sub>3</sub>BTBA) with zirconium
salt. BUT-39 has a unique porous framework structure, in which Zr<sub>6</sub> cluster acts as a rare low-symmetric 9-connected node and
BTBA<sup>3–</sup> as a T-shaped 3-connected linker. As far
as we know, this represents the first case of a (3,9)-connected ZrÂ(IV)-MOF.
BUT-39 could retain its framework integrity in boiling water, 2 M
HCl aqueous solution, and pH 12 NaOH aqueous solution. Due to its
good water stability and strong fluorescent emission, BUT-39 is then
employed in fluorescence sensing for various ions in aqueous solution
and shows good performance toward Cr<sub>2</sub>O<sub>7</sub><sup>2–</sup> selectively, at a low concentration and a short response
time (<1 min). Simultaneously, it also exhibits excellent capacity
to rapidly capture Cr<sub>2</sub>O<sub>7</sub><sup>2–</sup> (within 1 min) with a high uptake up to 1 mmol g<sup>–1</sup>. Taking advantage of its excellent stability, sensitive and selective
sensing, as well as rapid and high adsorption, BUT-39 is expected
to be useful in Cr<sub>2</sub>O<sub>7</sub><sup>2–</sup> detection
in and removal from water
Zr(IV)-Based Metal-Organic Framework with T‑Shaped Ligand: Unique Structure, High Stability, Selective Detection, and Rapid Adsorption of Cr<sub>2</sub>O<sub>7</sub><sup>2–</sup> in Water
Dichromate
is known for severe health impairments to organisms.
New and valid strategies have been developed to rapidly detect and
efficiently remove this pollutant. Constructing stable luminescent
metal-organic frameworks (MOFs) for dichromate recognition and removal
from aqueous solution could provide a feasible resolution to this
problem. Herein, a new luminescent ZrÂ(IV)-MOF, Zr<sub>6</sub>O<sub>4</sub>(OH)<sub>7</sub>(H<sub>2</sub>O)<sub>3</sub>(BTBA)<sub>3</sub> (BUT-39, BUT = Beijing University of Technology) was constructed
through the reaction of a newly designed functionalized T-shaped ligand
4,4′,4″-(1<i>H</i>-benzoÂ[<i>d</i>]Âimidazole-2,4,7-triyl)Âtribenzoic acid (H<sub>3</sub>BTBA) with zirconium
salt. BUT-39 has a unique porous framework structure, in which Zr<sub>6</sub> cluster acts as a rare low-symmetric 9-connected node and
BTBA<sup>3–</sup> as a T-shaped 3-connected linker. As far
as we know, this represents the first case of a (3,9)-connected ZrÂ(IV)-MOF.
BUT-39 could retain its framework integrity in boiling water, 2 M
HCl aqueous solution, and pH 12 NaOH aqueous solution. Due to its
good water stability and strong fluorescent emission, BUT-39 is then
employed in fluorescence sensing for various ions in aqueous solution
and shows good performance toward Cr<sub>2</sub>O<sub>7</sub><sup>2–</sup> selectively, at a low concentration and a short response
time (<1 min). Simultaneously, it also exhibits excellent capacity
to rapidly capture Cr<sub>2</sub>O<sub>7</sub><sup>2–</sup> (within 1 min) with a high uptake up to 1 mmol g<sup>–1</sup>. Taking advantage of its excellent stability, sensitive and selective
sensing, as well as rapid and high adsorption, BUT-39 is expected
to be useful in Cr<sub>2</sub>O<sub>7</sub><sup>2–</sup> detection
in and removal from water