Catalytic synthesis of chloroacetates with thermoregulated ionic liquids based on vanadium-substituted polyoxometalate

Yan, Jingsen; Wang, Zeqing; E, Yongsheng; He, Fengwei; Zhang, Danfeng; Wu, Qingyin

doi:10.1039/c8ra10659b

Cited by 13 publications

(8 citation statements)

References 38 publications

(38 reference statements)

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“…Therefore, the neat structure of Keggin-type heteropolyacid is mainly preserved after interaction with NH 2 groups of melem. [41,42] 3.1.2 | FE-SEM, EDS, and TEM…”

Section: Ft-irmentioning

confidence: 99%

Synergistic promotion of the photocatalytic efficacy of CuO nanoparticles by heteropolyacid‐attached melem: Robust photocatalytic efficacy and anticancer performance

Liu

Abbaspour

Rouki

et al. 2022

Applied Organom Chemis

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The in situ photocatalytic oxidation of aromatic alcohols to aldehydes by air under visible-light-driven condition is an attractive and beneficial route regarding environmental crises and worldwide energy economy. Herein, CuOmelem-heteropolyacid nanophotosensitizer is disclosed as an efficient heterostructured nanocomposite involving H 5-n PW 10 V 2 O 40 nÀ … (melem-NH 3 + ) n ionic liquid, successfully prepared via a facile and straightforward procedure.This nanocomposite is characterized employing routine techniques such as Xray diffraction (XRD), Fourier transform infrared (FT-IR), diffuse reflectance spectra (DRS), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FE-SEM),and Brunauer-Emmett-Teller (BET). The resultant nanocomposite exhibited superior photocatalytic efficacy than its pristine melem, HPA, and CuO constituents in the in situ photo-oxidation of benzylic alcohols and in the fast condensation with o-phenylenediamine to generate a range of 2-substituted benzimidazoles, as important precursors in the synthesis of important pharmaceuticals under the illumination of a green laser light (λ 535 nm). This study suggests a radical pathway involving reactive species such as •O 2 À and OH• together with h + in a photocatalytic process. Stability and reusability experiments along with hot filtration test ensured sufficient reproducibility of the nanophotocatalyst in the reaction medium. At the final part of this study, the in vitro cellular cytotoxicity of CuO-melem-heteropolyacid nanohybrid material was evaluated on A549 human lung cancer cell line with the MTT assay.The distinct reduction in cell viability affirmed cytotoxicity of the nanomaterial against the performed cell line.

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“…Therefore, the neat structure of Keggin-type heteropolyacid is mainly preserved after interaction with NH 2 groups of melem. [41,42] 3.1.2 | FE-SEM, EDS, and TEM…”

Section: Ft-irmentioning

confidence: 99%

Synergistic promotion of the photocatalytic efficacy of CuO nanoparticles by heteropolyacid‐attached melem: Robust photocatalytic efficacy and anticancer performance

Liu

Abbaspour

Rouki

et al. 2022

Applied Organom Chemis

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“…[36] Homogeneous catalysis-liquid/liquid separation catalytic system is the reverse temperature-aqueous solubility property of the nonionic surfactant (cloud point), which is the breaking and recovery of H-bonding by temperature change. [37][38][39] The cations and anions provided both Figure S11b). With the temperature decreased, the produced CS-12 was on the top of the resulting mixture, and the [Aemim] IM/H 2 O gradually sank to the bottom ( Figure S11c).…”

Section: Separation and Recyclingmentioning

confidence: 99%

Synthesis of 2, 2, 4‐trimethyl‐1, 3‐pentaerediol monoisobutyrate catalyzed by homogeneous catalysis‐liquid/liquid separation catalytic system based on Bibasic sites Ionic Liquids

Zhang

Wang

Xiang-xue

et al. 2020

Applied Organom Chemis

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Herein a novel homogeneous catalysis-liquid/liquid separation catalytic system based on 1, 8-diazabicyclo-[5.4.0] undec-7-ene (DBU)-functionalized, 1, 1, 3, 3-tetramethyl guanidine-functionalized and imidazolium-functionalized bibasic sites ionic liquids (BSILs) ([HDBU]IM, [Aemim]IM, [TMG]IM, [Aemim] Pro, [Aemim]Gly, [HDBU]Pro and [HDBU]Gly) with a room temperature liquid/liquid phase transition characteristic were reported. And for the first time, this novel catalytic system was employed for the synthesis of 2, 2, 4-trimethyl-1, 3-pentaerediol monoisobutyrate (CS-12), achieving homogeneous catalysis, easy recycling and long service-life of the catalyst. Additionally, the mechanism of homogeneous catalysis-biphasic separation might be explained by the solubility of reactant and product in BSILs/H 2 O catalytic system and the existence H-bonding between BSILs and H 2 O. Bibasic sites were confirmed by two endothermic peaks on the TG-DCS curve of [Aemim]IMC (the CO 2 captured by [Aemim]IM).

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“…[12][13][14][15][16][17][18][19][20][21][22] Heteropoly acids are polyoxometalates bridged by hetero atoms and polyatomic atoms through oxygen atom coordination in a certain structure, and they are green dual-functional catalysts with both acid-base and oxidation-reduction properties. [23][24][25][26][27][28] Heteropoly acids can be combined with ionic liquids by ion exchange to prepare heteropoly acid ionic liquid catalysts, [29][30][31][32][33] so that a reversible phase transformation may be realized, 34,35 which means a uniform system can be formed at a high reaction temperature, and two-phase separation can be made by reducing the temperature after the reaction, to facilitate recycling. 36,37 To sum up, in this study, titanium-centered heteropoly acid salts with different metal vacancies were prepared first and then combined with 1-butyl-3-methylimidazolium chloride by ion exchange to obtain heteropoly acid ionic liquids.…”

Section: Introductionmentioning

confidence: 99%

Preparation of a heteropoly acid ionic liquid and its application in the catalytic degradation of bottle-grade PET

et al. 2023

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Catalytic synthesis of chloroacetates with thermoregulated ionic liquids based on vanadium-substituted polyoxometalate

Abstract: The ionic liquid catalyst [TEAPS]5PW10V2O40 exhibited good activity and reusability in the esterification process owing to its acidity and thermoregulated properties.

Cited by 13 publications

References 38 publications

Synergistic promotion of the photocatalytic efficacy of CuO nanoparticles by heteropolyacid‐attached melem: Robust photocatalytic efficacy and anticancer performance

Synergistic promotion of the photocatalytic efficacy of CuO nanoparticles by heteropolyacid‐attached melem: Robust photocatalytic efficacy and anticancer performance

Synthesis of 2, 2, 4‐trimethyl‐1, 3‐pentaerediol monoisobutyrate catalyzed by homogeneous catalysis‐liquid/liquid separation catalytic system based on Bibasic sites Ionic Liquids

Preparation of a heteropoly acid ionic liquid and its application in the catalytic degradation of bottle-grade PET

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