Crystal structure transformations during phase transitions in homologues of n-alkanes: C23H48, C24H50, C25H52 as revealed by FT-IR spectroscopy

Gureva, S A; Marikhin, V. A.; Myasnikova, L. P.; Волчек, Б. З.; Medvedeva, D. A.

doi:10.1088/1742-6596/1400/5/055040

Cited by 3 publications

(1 citation statement)

References 2 publications

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“…The intense peak observed at 900 cm À1 is associated with the stretching vibration of the CO bond, and finally, the very wide peak at 650 cm À1 observed in all the spectra correspond to the C-H (CH 2 ) rocking bond. 47 As the infrared analysis is known to be a qualitative and quantitative analysis, 48 we notice a continuous increase in the intensity of many bands (O-H, C-H, C-O, …) from the G1 generations to the G3, this is due to the multiplication chemical functions and increasing generations.…”

Section: H Nmr/ftir Studymentioning

confidence: 94%

Classical and ultrasonic preparation of new dendrimer–Copper nanocomposites: Application in the catalytic reduction, antioxidant, and antimicrobial activities

Zaoui

Daouadji

Beldjilali

et al. 2023

Applied Organom Chemis

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A new dendrimer based on citric acid and sebacoyl chloride was synthesized by Steglich esterification. The obtained dendrimer was used as a matrix for the dispersion of copper nanoparticles using classical and ultrasound methods. All materials were characterized by FTIR, 1H NMR, thermogravimetric analysis, X-ray photoelectron spectrometry, scanning electron microscopy, and energ-ydispersive -X-ray spectroscopy. The obtained nanocomposites were tested against two Gram-positive pathogenic bacteria (Bacillus cereus and Staphylococcus aureus), two Gram negative (Escherichia coli and Pseudomonas aeruginosa), the organic dye methylene blue, and in the 1,1-diphenyl-2-picrylhydrazile radical scavenging assay. A comparative study between both methods in structural, morphological, and thermal properties as well as in the antimicrobial, antioxidant, and catalytic reduction activities was provided. All nanocomposites showed an excellent activity for all applications. The comparison between both synthesis methods shows the superiority of the sonication methods, especially via the catalytic reduction and the antioxidant activities, the classic method allows better thermal stability and a higher metal content with some cationic oxidation state in the obtained nanocomposites, but ultrasound allows a better dispersion with a fully reduced metal.

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Section: H Nmr/ftir Studymentioning

confidence: 94%

Classical and ultrasonic preparation of new dendrimer–Copper nanocomposites: Application in the catalytic reduction, antioxidant, and antimicrobial activities

Zaoui

Daouadji

Beldjilali

et al. 2023

Applied Organom Chemis

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Study of the phase behavior of n-pentacosane C₂₅H₅₂ by optical method

Kuryakov

Dechabo

2020

J. Phys.: Conf. Ser.

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For two samples of n-pentacosane dispersions in water with different average size of the dispersed phase, the melting, crystallization and rotator phase temperatures are determined by optical method. For particles, that have a radius of 100 nm, the temperatures of phase transition correspond with the published data. For particles with a radius, that is not exceeding 50 nm, a significant undercooling of n-pentacosan drops happens.

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Application of In Situ ATR-FTIR Sресtrоsсору for Determination of Wax Aрреаrаnсе Tеmреrаturе at High-Prеssurе СО2 Conditions

Shalygin

Morozov²,

Martyanov³

2022

Pet. Chem.

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Crystal structure transformations during phase transitions in homologues of n-alkanes: C₂₃H₄₈, C₂₄H₅₀, C₂₅H₅₂ as revealed by FT-IR spectroscopy

Cited by 3 publications

References 2 publications

Classical and ultrasonic preparation of new dendrimer–Copper nanocomposites: Application in the catalytic reduction, antioxidant, and antimicrobial activities

Classical and ultrasonic preparation of new dendrimer–Copper nanocomposites: Application in the catalytic reduction, antioxidant, and antimicrobial activities

Study of the phase behavior of n-pentacosane C₂₅H₅₂ by optical method

Application of In Situ ATR-FTIR Sресtrоsсору for Determination of Wax Aрреаrаnсе Tеmреrаturе at High-Prеssurе СО2 Conditions

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Crystal structure transformations during phase transitions in homologues of n-alkanes: C23H48, C24H50, C25H52 as revealed by FT-IR spectroscopy

Cited by 3 publications

References 2 publications

Classical and ultrasonic preparation of new dendrimer–Copper nanocomposites: Application in the catalytic reduction, antioxidant, and antimicrobial activities

Classical and ultrasonic preparation of new dendrimer–Copper nanocomposites: Application in the catalytic reduction, antioxidant, and antimicrobial activities

Study of the phase behavior of n-pentacosane C25H52 by optical method

Application of In Situ ATR-FTIR Sресtrоsсору for Determination of Wax Aрреаrаnсе Tеmреrаturе at High-Prеssurе СО2 Conditions

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Crystal structure transformations during phase transitions in homologues of n-alkanes: C₂₃H₄₈, C₂₄H₅₀, C₂₅H₅₂ as revealed by FT-IR spectroscopy

Study of the phase behavior of n-pentacosane C₂₅H₅₂ by optical method