Construction and stabilization of highly active Cu+ sites in layered double hydroxides for the cascade radical addition/cyclization reactions

Sun, Zhonghua; Xiao, Yue; Qian, Fei; Tian, Xiaoting; Wang, Anwei; Zhou, Weiyou; He, Mingyang

doi:10.1016/j.mcat.2022.112415

Cited by 3 publications

(3 citation statements)

References 34 publications

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“…934.30 eV, which are assigned to Cu + and Cu 2+ , respectively. 32,[33][34][35] The ratio of Cu + /Cu 2+ could be estimated according to the two spin-orbit doublets, and a value of 0.57 was obtained. The value is significantly higher that of CuMgAl-LDH (0.12), 32 implying that the redox reaction in CuCoAl-LDH was significantly more evident.…”

Section: Scope Of Substratesmentioning

confidence: 99%

“…32,[33][34][35] The ratio of Cu + /Cu 2+ could be estimated according to the two spin-orbit doublets, and a value of 0.57 was obtained. The value is significantly higher that of CuMgAl-LDH (0.12), 32 implying that the redox reaction in CuCoAl-LDH was significantly more evident. In addition, the XPS spectra of Co 2p 3/2 for CuCoAl-LDH can also be fitted by two peaks, and binding energies of ca.…”

Section: Scope Of Substratesmentioning

confidence: 99%

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Cooperation between the Cu⁺ and Cu²⁺ species in CuCoAl layered double hydroxide and the substrate promoting effect afford a really simple protocol for the efficient synthesis of quinazolines

Zhou,

Qian,

Zhou

et al. 2024

Org. Biomol. Chem.

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Section: Scope Of Substratesmentioning

confidence: 99%

Section: Scope Of Substratesmentioning

confidence: 99%

Cooperation between the Cu⁺ and Cu²⁺ species in CuCoAl layered double hydroxide and the substrate promoting effect afford a really simple protocol for the efficient synthesis of quinazolines

Zhou,

Qian,

Zhou

et al. 2024

Org. Biomol. Chem.

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“…In recent years, two-dimensional nanomaterials have been widely studied and used as attractive candidates for the construction of heterogeneous solid catalysts, electrodes, adsorbents, metal-sulfur batteries, etc 1 – 3 . Double-layered hydroxides known for more than a decade, are abundant in nature and easily extracted, and represent a large class of anion- and cation-exchangeable layered structures with the general formula [M 2+ (1-x) Mx 3+ (OH) 2 is](An - ) x/n.zH 2 O].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, properties, and application of the new nanocatalyst of double layer hydroxides in the one-pot multicomponent synthesis of 2-amino-3-cyanopyridine derivatives

Momeni

Ghorbani‐Vaghei

2023

Sci Rep

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A new heterogeneous nanocatalyst LDH@3-chloropyltrimethoxysilane@1,3-benzenedisulfonyl amine@Cu (LDH@TRMS@BDSA@Cu) was synthesized and confirmed by analyzes such as Fourier transform infrared spectroscopy, Field Emission Scanning Electron Microscopy, energy scattered X-ray spectroscopy (EDX), elemental mapping, X-ray diffraction analysis, heat gravity/heat derivatization (TGA) and differential scanning calorimetry. The newly synthesized nanocatalyst effectively catalyzed the reaction between different aryl aldehydes, malononitrile, different acetophenones and ammonium acetate in solvent-free conditions and they were converted into 2-amino-3-cyanopyridine derivatives with high efficiency. The reaction showed advantages such as simplicity, high stability, environmental friendliness, excellent efficiency and short time. Also, this catalyst is recyclable and was recycled 4 times without losing significant catalytic power.

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Removal of amoxicillin employing Fenton-type process using delaminated clay and layered double hydroxides impregnated with Fe or Cu as catalysts

Lugo,

Diaz,

Contreras

et al. 2024

Preprint

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The presence of antibiotics in the environment has raised concerns due to their potential negative effects on ecosystems. Conventional water treatment methods are ineffective at removing antibiotics. This study aims to investigate the efficiency of Fenton-like processes catalyzed by delaminated clay and layered double hydroxides impregnated with Fe or Cu for the degradation of amoxicillin. The catalysts were obtained by synthesizing delaminated clay and layered double hydroxides and subsequently impregnating them with Fe or Cu. The characterization of catalysts involved X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray fluorescence (XRF), N2 adsorption-desorption, and X-ray photoelectron spectroscopy (XPS). Catalytic activity was assessed by varying the concentration of hydrogen peroxide, the initial concentration of amoxicillin, and the amount of catalyst. The determination of byproducts was done by high-performance liquid chromatography (HPLC) with a quadrupole time-of-flight mass spectrometer (QqTof). The study found that layered double hydroxides impregnated with Fe or Cu were able to remove 100% of amoxicillin in just 20 min. The study identified 16 byproducts, indicating a degradation process. Under all of the studied conditions, the copper catalysts showed the highest percentage of amoxicillin removal.

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Construction and stabilization of highly active Cu+ sites in layered double hydroxides for the cascade radical addition/cyclization reactions

Cited by 3 publications

References 34 publications

Cooperation between the Cu⁺ and Cu²⁺ species in CuCoAl layered double hydroxide and the substrate promoting effect afford a really simple protocol for the efficient synthesis of quinazolines

Cooperation between the Cu⁺ and Cu²⁺ species in CuCoAl layered double hydroxide and the substrate promoting effect afford a really simple protocol for the efficient synthesis of quinazolines

Synthesis, properties, and application of the new nanocatalyst of double layer hydroxides in the one-pot multicomponent synthesis of 2-amino-3-cyanopyridine derivatives

Removal of amoxicillin employing Fenton-type process using delaminated clay and layered double hydroxides impregnated with Fe or Cu as catalysts

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Construction and stabilization of highly active Cu+ sites in layered double hydroxides for the cascade radical addition/cyclization reactions

Cited by 3 publications

References 34 publications

Cooperation between the Cu+ and Cu2+ species in CuCoAl layered double hydroxide and the substrate promoting effect afford a really simple protocol for the efficient synthesis of quinazolines

Cooperation between the Cu+ and Cu2+ species in CuCoAl layered double hydroxide and the substrate promoting effect afford a really simple protocol for the efficient synthesis of quinazolines

Synthesis, properties, and application of the new nanocatalyst of double layer hydroxides in the one-pot multicomponent synthesis of 2-amino-3-cyanopyridine derivatives

Removal of amoxicillin employing Fenton-type process using delaminated clay and layered double hydroxides impregnated with Fe or Cu as catalysts

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Cooperation between the Cu⁺ and Cu²⁺ species in CuCoAl layered double hydroxide and the substrate promoting effect afford a really simple protocol for the efficient synthesis of quinazolines

Cooperation between the Cu⁺ and Cu²⁺ species in CuCoAl layered double hydroxide and the substrate promoting effect afford a really simple protocol for the efficient synthesis of quinazolines