Rational Assembly of Three‐component Coordination Polymers as Heterogeneous Catalysts for CO2 Cycloaddition and Cyanosilylation Reactions

Chemistry - A European Journal, Год журнала: 2024, Номер unknown

Опубликована: Окт. 7, 2024

Abstract Four new coordination polymers based on 5‐(((1 H ‐imidazol‐2‐yl)methyl)amino) isophthalic acid (H 3 L ) and auxiliary ligands (1,10‐phenanthroline, 2,2′‐bipyridine, 4,4′‐bipyridine), namely, {[Zn(H )(phen)(H 2 O)] ⋅ 2H O} n ( CP 1 ), {[Ni(H O)]} )(2,2′‐bpy)(H {[Cd(H )(4,4′‐bpy) 0.5 4 were rationally assembled. Furthermore, these four CPs screened as heterogeneous catalysts for CO cycloaddition cyanosilylation reactions under mild conditions. The catalytic experiments showed that had the better performance, excellent substrate tolerance recyclability above two reactions. It is speculated activity of may be due to open Lewis base site acidic characteristics zinc (II) center. After five cycles, activities did not significantly decrease, structures remained unchanged. Therefore, was considered efficient stable

Язык: Английский

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A Novel Multifunctional Eu (III)‐MOF Luminescence Sensor for Detecting NB, Fe³⁺, and Cr₂O₇²⁻ With Outstanding Sensitivities and Selectivities

Applied Organometallic Chemistry, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 13, 2024

ABSTRACT The bowl‐shaped flexible carboxylic acid zwitterion 1,1′,1″‐(2,4,6‐trimethylbenzene‐1,3,5‐triyl)tris (methylene)‐tris(4‐carboxy‐pyridinium)tribromide (H 3 L Br ) ligand‐based lanthanide metal–organic framework (Ln‐MOF) was synthesized for the first time under solvothermal conditions. Single crystal X‐ray diffraction analysis indicates that molecular formula of Ln‐MOF is [Eu 2 O) 4 ]·2H O ( 1 ). Luminescence sensing experiments demonstrate shows obvious fluorescence quenching nitrobenzene (NB), Fe 3+ , and Cr 7 2− with low detection limits 0.118 μM, 9.098 nM, 17.409 respectively. can be regarded as a luminescence sensor multiple functions, displaying high selectivity, wonderful antiinterference ability, outstanding sensitivity, recyclability to detect NB, .

Язык: Английский

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Six cobalt(II), zinc(II), nickel(II) and copper(II) complexes based on bis-benzimidazolyl bidentate ligands with phenolyl ether linkers: synthesis, structural studies and recognition for HSO₄^-

CrystEngComm, Год журнала: 2024, Номер 26(36), С. 5078 - 5089

Опубликована: Янв. 1, 2024

Six metal complexes based on bis-benzimidazolyl ligands were prepared, and the recognition of HSO 4 − by complex 1 was studied.

Язык: Английский

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2p-4f one-dimensional chains and two-dimensional networks assembled by multicoordinating nitronyl nitroxide radical ligand

CrystEngComm, Год журнала: 2024, Номер 26(38), С. 5351 - 5357

Опубликована: Янв. 1, 2024

Two series of 2p–4f complexes, 1D chains and unique 2D networks, were successfully constructed using a multicoordinating nitronyl nitroxide radical. The complex Dy exhibits slow relaxation magnetization.

Язык: Английский

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Cluster-Based Bimetallic 3d–4s {CuIn} Metal–Organic Framework for Efficiently Catalyzing Diazotization of Primary Amines

Crystal Growth & Design, Год журнала: 2024, Номер 24(21), С. 8921 - 8928

Опубликована: Окт. 24, 2024

Organic azides are extensively utilized in organic synthesis and clinical drug development. However, the commonly employed catalysts for preparation of azides, such as inorganic salts simple metal complexes, often suffer from low yields production byproducts. In this study, we report rational a porous, cluster-based bimetallic metal–organic framework (MOF) with large nanocage 1 nm diameter, termed compound 1, designed specific reaction. Compound exhibits exceptional solvent stability, remaining stable even presence corrosive triethylamine. Catalytic investigations revealed that serves an effective catalyst reaction primary amines TfN3, yielding various under mild conditions. Moreover, MOF demonstrates significant catalytic activity aminoglycoside kanamycin A. The proceeds smoothly producing fewer byproducts exhibiting good regioselectivity. Additionally, can be reused at least five times without noticeable decrease activity. Notably, represents first application materials amino diazotization

Язык: Английский

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Effect of the Introduction of Zn^II and Cd^II Ions on Eu^III and Tb^III Emission in M₂Ln₂ Heterometallic Molecules With 2‐Furoic Acid Anions

Applied Organometallic Chemistry, Год журнала: 2024, Номер unknown

Опубликована: Окт. 25, 2024

ABSTRACT Heterometallic d‐4f coordination complexes are of paramount interest in modern chemistry because their potential applications organic light‐emitting devices and spintronic materials. Here we report the synthesis thorough investigation Ln MLn (M = Zn, Cd; Sm, Eu, Gd, Tb) molecular based on 2‐furancarboxylic acid anion (Hfur): [Ln 2 (NO 3 ) (fur) 4 (DME) ] (Ln Tb; DME is dimethoxyethane) [M 8 (bpy) Tb, Sm; bpy 2,2′‐bipyridyl). The structure isostructural nature compounds were determined single‐crystal powder X‐ray diffraction data. photophysical properties obtained studied detail: energies triplet levels furoate d‐blocks {M(fur) (bpy)} Cd), relaxation times excited states, quantum yields determined. Critical step from to ZnLn CdLn accompanied by an increase yields, which correlates with a change energy level aromatic part results chemical calculations indicating different schemes for origination compounds.

Язык: Английский

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Two New Luminescent Metal–Organic Frameworks as Fluorescent Sensors of Nitrobenzene, Fe³⁺, and Cr₂O₇²⁻

Applied Organometallic Chemistry, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 13, 2024

ABSTRACT Two new luminescent metal–organic frameworks (MOFs), namely, [Zn 2 (H L ) ] n (1) and {[Cd O) ]⋅(H 0.5 } ( [H 3 = 5‐((4‐(1 H ‐1,2,4‐triazol‐1‐yl)benzyl)amino)isophthalic acid ligand], have been solvothermally synthesized characterized. Single‐crystal x‐ray diffraction shows that 1 exhibits a 3D framework, whereas features 2D network. Furthermore, the fluorescence studies demonstrated exhibited sensing activity for nitrobenzene (NB), Fe 3+ ions, Cr O 7 2− anions with high selectivity, sensitivity, low detection limit, corresponding limits of were 6.40 × 10 −7 , 1.26 1.44 M, respectively, 2.42 −6 3.41 2.90 respectively. excellent solvent, pH, thermal stabilities. The results suggested both can be considered as potential fluorescent sensors NB, anions.

Язык: Английский

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Two indium-based metal-organic frameworks (MOFs) synthesized with two different lengths of ligands as fluorescence sensors for the selective detection of Fe3+ in aqueous environments

Journal of Molecular Structure, Год журнала: 2024, Номер unknown, С. 141245 - 141245

Опубликована: Дек. 1, 2024

Язык: Английский

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Structure features and magnetic properties of rare earth metals (3+) tetrakis(hexafluoroacetylacetonates) with 1,1′-diethyl-4,4′-bipyridinium dication

Journal of Molecular Structure, Год журнала: 2024, Номер 1327, С. 141172 - 141172

Опубликована: Дек. 28, 2024

Язык: Английский

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