Schiff base stabilized gold nanoparticles: Synthesis, characterization, catalytic reduction of nitroaromatic compounds, fluorometric sensing, and biological activities

Suneetha, G.; Ayodhya, Dasari; Manjari, P. Sunitha

doi:10.1016/j.rechem.2022.100688

Cited by 12 publications

(3 citation statements)

References 37 publications

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“…The SEM technique is electron microscopy that produces meaningful pictures of a material by scanning its surface with a focused electron beam. , When the electron reacts with the sample atom, it sends out different signals that reveal the surface topography, size, and shape of the synthesized compound. In modern materials chemistry, SEM is often used to figure out the shape of a surface.…”

Section: Results and Discussionmentioning

confidence: 99%

Exploring New Schiff Bases: Synthesis, Characterization, and Multifaceted Analysis for Biomedical Applications

Thakor,

Patel,

Patel

et al. 2024

ACS Omega

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The current work aims to generate novel Schiff bases by reacting substituted aldehydes with amine derivatives catalyzed by a natural acid. The developed compounds underwent diverse physicochemical analyses including liquid chromatography−mass spectrometry, Fourier transform infrared spectroscopy, scanning electron microscopy, 1 H-and 13 C-nuclear magnetic resonance, and X-ray diffraction. Furthermore, differential thermogravimetric, thermogravimetric, and differential thermal analysis techniques were employed in a nitrogen-free environment to determine kinetic parameters. These data were then used in model-free isoconversional methods (e.g., Friedman, Kissinger−Akahira−Sunose, and Flynn−Wall−Ozawa). The Schiff bases were evaluated for their in vitro and in silico α-amylase inhibitory activity. Schiff base-2 displayed the highest inhibition compared with the reference drug acarbose. In comprehensive MTT assay cytotoxicity investigations, both Schiff bases showed strong anticancer capabilities against the human lung cancer cell line (A549). Moreover, this study demonstrated effectiveness of synthetic compounds in screening Caenorhabditis elegans for anti-Alzheimer's and stress resistance properties. The simplicity of its biology allowed precise evaluation of the effect of compounds on neuronal function and stress response. This research enhances drug discovery efforts for Alzheimer's and stress-related disorders, potentially improving patient outcomes.

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Section: Results and Discussionmentioning

confidence: 99%

Exploring New Schiff Bases: Synthesis, Characterization, and Multifaceted Analysis for Biomedical Applications

Thakor,

Patel,

Patel

et al. 2024

ACS Omega

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show abstract

“…It was demonstrated that 4-NP shows an absorption peak at 317 nm in the absence of NaBH 4 solution, while after the addition of the NaBH 4 solution, the absorption peak moves to 400 nm. This may be attributed to the formation of 4-nitrophenolate ion [27][28][29][30].…”

Section: Catalytic Activity Experiments For 4-npmentioning

confidence: 99%

High Catalytic Activity of CoxPt100−x Alloys for Phenolic Compound Reduction

Dragos-Pinzaru,

Buema,

Racila

et al. 2024

Nanomaterials

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In this study, we report the influence of the Pt concentration in CoxPt100−x alloys on the catalytic activity of the alloys for 4-nitrophenol (4-NP) reduction. More precisely, a series of CoxPt100−x alloys with a Pt concentration ranging between 60% and 95% were prepared using electrodeposition at controlled potentials from stable hexachloroplatinate aqueous solution. The Pt concentration was tuned by varying the electrodeposition potential from −0.6 to −0.9 V. The changes in the CoxPt100−x alloy microstructure and crystalline structure have been investigated using SEM and TEM analysis. Our results show that the microstructure and the crystalline structure of the as-prepared materials do not depend on the electrodeposition potential. However, the catalytic activity of CoxPt100−x alloys is closely correlated with the potential applied during electrochemical synthesis, hence the Pt content. We demonstrated that the synthesized materials present a high catalytic activity (approx. 90%) after six cycles of reusability despite the fact that the Pt content of the as-prepared alloys decreases. The easy preparation method that guarantees more than 97% catalytic activity of the CoxPt100−x alloys, the easy recovery from solution, and the possibility of reusing the CoxPt100−x alloys are the benefits of the present study.

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“…Various types of NPs can be employed in this context, including metallic NPs (such as gold, silver, or platinum), semiconductor NPs (such as quantum dots), magnetic NPs (such as iron oxide), and carbon-based NPs (such as graphene or carbon nanotubes) [122,123]. These NPs offer specific advantages depending on the target analyte and the desired sensing mechanism.…”

Section: Nanoparticle Materials-based Chemosensorsmentioning

confidence: 99%

Strategies for Improving Selectivity and Sensitivity of Schiff Base Fluorescent Chemosensors for Toxic and Heavy Metals

Musikavanhu,

Liang,

Xue

et al. 2023

Molecules

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Toxic cations, including heavy metals, pose significant environmental and health risks, necessitating the development of reliable detection methods. This review investigates the techniques and approaches used to strengthen the sensitivity and selectivity of Schiff base fluorescent chemosensors designed specifically to detect toxic and heavy metal cations. The paper explores a range of strategies, including functional group variations, structural modifications, and the integration of nanomaterials or auxiliary receptors, to amplify the efficiency of these chemosensors. By improving selectivity towards targeted cations and achieving heightened sensitivity and detection limits, consequently, these strategies contribute to the advancement of accurate and efficient detection methods while increasing the range of end-use applications. The findings discussed in this review offer valuable insights into the potential of leveraging Schiff base fluorescent chemosensors for the accurate and reliable detection and monitoring of heavy metal cations in various fields, including environmental monitoring, biomedical research, and industrial safety.

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Schiff base stabilized gold nanoparticles: Synthesis, characterization, catalytic reduction of nitroaromatic compounds, fluorometric sensing, and biological activities

Cited by 12 publications

References 37 publications

Exploring New Schiff Bases: Synthesis, Characterization, and Multifaceted Analysis for Biomedical Applications

Exploring New Schiff Bases: Synthesis, Characterization, and Multifaceted Analysis for Biomedical Applications

High Catalytic Activity of CoxPt100−x Alloys for Phenolic Compound Reduction

Strategies for Improving Selectivity and Sensitivity of Schiff Base Fluorescent Chemosensors for Toxic and Heavy Metals

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