A Sustainable Approach to Develop Gold Nanoparticles with Kalanchoe fedtschenkoi and Their Interaction with Protein and Dye: Sensing and Catalytic Probe

Bhatt, Neha; Mehata, Mohan Singh

doi:10.1007/s11468-023-01814-z

Cited by 6 publications

(5 citation statements)

References 90 publications

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“…Interestingly, FTIR spectra of K. fedtschenkoi extracts present related peaks from 1600 to 1500 cm −1 , which can respond to bending vibrations of C=O bonds, possibly from esters, ketones, and carboxylic acids [ 74 ]. These findings are in accord with FTIR analysis of the chemical composition of extracts from other plants, including K. fedtschenkoi [ 75 , 76 ].…”

Section: Resultssupporting

confidence: 82%

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Biological Activities and Chemical Profiles of Kalanchoe fedtschenkoi Extracts

Mejía-Méndez

Bach

Lorenzo-Leal

et al. 2023

Plants

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In this study, the leaves of Kalanchoe fedtschenkoi were consecutively macerated with hexane, chloroform, and methanol. These extracts were used to assess the bioactivities of the plant. The antimicrobial activity was tested against a panel of Gram-positive and -negative pathogenic bacterial and fungal strains using the microdilution method. The cytotoxicity of K. fedtschenkoi extracts was investigated using human-derived macrophage THP-1 cells through the MTT assay. Finally, the anti-inflammatory activity of extracts was studied using the same cell line by measuring the secretion of IL-10 and IL-6. The phytoconstituents of hexane and chloroform extracts were evaluated using gas chromatography–mass spectrometry (GC/MS). In addition, high-performance liquid chromatography (HPLC) was used to study the phytochemical content of methanol extract. The total flavonoid content (TFC) of methanol extract is also reported. The chemical composition of K. fedtschenkoi extracts was evaluated using Fourier-transform infrared spectroscopy (FTIR). Results revealed that the chloroform extract inhibited the growth of Pseudomonas aeruginosa at 150 μg/mL. At the same concentration, methanol extract inhibited the growth of methicillin-resistant Staphylococcus aureus (MRSA). Regarding their cytotoxicity, the three extracts were highly cytotoxic against the tested cell line at IC50 < 3 μg/mL. In addition, the chloroform extract significantly stimulated the secretion of IL-10 at 50 μg/mL (p < 0.01). GC/MS analyses revealed that hexane and chloroform extracts contain fatty acids, sterols, vitamin E, and triterpenes. The HPLC analysis demonstrated that methanol extract was constituted by quercetin and kaempferol derivatives. This is the first report in which the bioactivities and chemical profiles of K. fedtschenkoi are assessed for non-polar and polar extracts.

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Section: Resultssupporting

confidence: 82%

“…12, x FOR PEER REVIEW 9 of 16 acids[74]. These findings are in accord with FTIR analysis of the chemical composition of extracts from other plants, including K. fedtschenkoi[75,76].…”

supporting

confidence: 74%

Biological Activities and Chemical Profiles of Kalanchoe fedtschenkoi Extracts

Mejía-Méndez

Bach

Lorenzo-Leal

et al. 2023

Plants

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“…The hydrogel nanocomposite successfully catalyzed the complete photodegradation of the organic dye methylene blue (MB) within 1 h using a solar simulator (Figure F). The photocatalytic performance of the nanocomposite gel was superior to other green systems with AuNPs (e.g., that displayed negligible MB photodegradation, 18% MB photodegradation in 16 min, 80% MB photodegradation over 2 h). Dye removal is just one example of catalytic application of the nanocomposite, and further uses can be envisaged that go well beyond water purification, , for instance toward enantioselective catalysis, − or sensing …”

Section: Resultsmentioning

confidence: 99%

Peptide Stereochemistry Effects from pK_a-Shift to Gold Nanoparticle Templating in a Supramolecular Hydrogel

Adorinni,

Gentile,

Bellotto

et al. 2024

ACS Nano

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The divergent supramolecular behavior of a series of tripeptide stereoisomers was elucidated through spectroscopic, microscopic, crystallographic, and computational techniques. Only two epimers were able to effectively self-organize into amphipathic structures, leading to supramolecular hydrogels or crystals, respectively. Despite the similarity between the two peptides' turn conformations, stereoconfiguration led to different abilities to engage in intramolecular hydrogen bonding. Self-assembly further shifted the pK a value of the C-terminal side chain. As a result, across the pH range 4−6, only one epimer predominated sufficiently as a zwitterion to reach the critical molar fraction, allowing gelation. By contrast, the differing pK a values and higher dipole moment of the other epimer favored crystallization. The four stereoisomers were further tested for gold nanoparticle (AuNP) formation, with the supramolecular hydrogel being the key to control and stabilize AuNPs, yielding a nanocomposite that catalyzed the photodegradation of a dye. Importantly, the AuNP formation occurred without the use of reductants other than the peptide, and the redox chemistry was investigated by LC−MS, NMR, and infrared scattering-type near field optical microscopy (IR s-SNOM). This study provides important insights for the rational design of simple peptides as minimalistic and green building blocks for functional nanocomposites.

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“…As the composite structure comprises polymers, the movement of these polymer frameworks could potentially immobilize the nanogold. This dual functionality is anticipated to hinder the aggregation of nanoparticles and fibers and contribute to maintaining small particle size and stability [40].…”

Section: Resultsmentioning

confidence: 99%

“…The study examined the impact of different concentrations (10,20,30, and 40 mg L −1 ) and temperatures (20,30,40, and 50 • C) on batch MB adsorption experiments on NGC at pH 8. To effectively analyze the adsorption isotherms, four distinct models were employed: Langmuir Equation ( 8), Freundlich Equation ( 9), Temkin Equation (10), and Dubinin-Radushkevich Equation (11).…”

Section: Effect Of Different Concentrations and Temperaturesmentioning

confidence: 99%

A Novel Nanogold Composite Fabrication, Its Characterization, and Its Application in the Removal of Methylene Blue Dye from an Aqueous Solution

Abood,

Essa,

Alsuraifi

et al. 2024

Applied Sciences

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A unique aspect of this research lies in the combination of polyethylene terephthalate (PET) nanofibers with Auo@PPh2-PIILP to create a nanogold composite (NGC). This NGC has proven to be highly efficient in removing methylene blue (MB) from wastewater. The prepared nanogold composite NGC was characterized by Fourier-transform infrared spectroscopy (FTIR), Field Emission Scanning Electron Microscopy (FE-SEM), transmission electron microscopy (TEM), Energy Dispersive X-ray Spectroscopy (EDAX), and Elements Distribution Mapping (EDM). Several factors were examined in batch adsorption experiments to determine their impact on dye adsorption. These factors included the initial pH range of four to eight, the dosage of NGC adsorbent ranging from 0.001 to 0.008 g, the initial concentration of MB dye ranging from 10 to 50 mg L−1, and the contact period ranging from 10 to 80 min. It has been observed that NGC is more efficient in removing MB from polluted water. The results of the pseudo-second-order model show good agreement between the calculated adsorption capacity (qe)cal. (4.3840 mg g−1) and the experimental adsorption capacity (qe)exp. (4.6838 mg g−1) values. Experimental findings suggest a monolayer capping of MB dye on the NGC surface with a maximum adsorption capacity Qm of 18.622 mg g−1 at 20 °C, indicating that it is well-fitted to the Langmuir isotherm.

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A Sustainable Approach to Develop Gold Nanoparticles with Kalanchoe fedtschenkoi and Their Interaction with Protein and Dye: Sensing and Catalytic Probe

Cited by 6 publications

References 90 publications

Biological Activities and Chemical Profiles of Kalanchoe fedtschenkoi Extracts

Biological Activities and Chemical Profiles of Kalanchoe fedtschenkoi Extracts

Peptide Stereochemistry Effects from pK_a-Shift to Gold Nanoparticle Templating in a Supramolecular Hydrogel

A Novel Nanogold Composite Fabrication, Its Characterization, and Its Application in the Removal of Methylene Blue Dye from an Aqueous Solution

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A Sustainable Approach to Develop Gold Nanoparticles with Kalanchoe fedtschenkoi and Their Interaction with Protein and Dye: Sensing and Catalytic Probe

Cited by 6 publications

References 90 publications

Biological Activities and Chemical Profiles of Kalanchoe fedtschenkoi Extracts

Biological Activities and Chemical Profiles of Kalanchoe fedtschenkoi Extracts

Peptide Stereochemistry Effects from pKa-Shift to Gold Nanoparticle Templating in a Supramolecular Hydrogel

A Novel Nanogold Composite Fabrication, Its Characterization, and Its Application in the Removal of Methylene Blue Dye from an Aqueous Solution

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Product

Resources

About

Peptide Stereochemistry Effects from pK_a-Shift to Gold Nanoparticle Templating in a Supramolecular Hydrogel