Study of the Kinetics of the Phase Transition of the First Order in Tetracosane C24H50 by Fourier-Transform IR Spectroscopy

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

doi:10.1134/s1063783419100251

Cited by 7 publications

(2 citation statements)

References 12 publications

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“…The rather complex pattern of frequency changes for stretching vibrations can be noted, as compared to the temperature transformation of the spectrum which we have found earlier [9] for the same CH 2 -oscillators in methylene sequences, but which are involved in other vibration modes, namely, rocking vibrations (in the region of ν ∼ 720 cm −1 ) and scissoring vibrations (in the region of ν ∼ 1470 cm −1 ) (Fig. 5).…”

Section: Frequencies Of Stretching C−h-vibrations CMsupporting

confidence: 57%

“…We used methods of high-resolution synchrotron X-ray diffraction [8] and Fourier-transform IR spectroscopy [9] to study the kinetics of development of a solid-solid phase transition in crystalline cores of nano-lamellae in polycrystalline tetracosane n-C 24 H 50 during heating of samples crystallized from the melt. In accordance with the literature data [10,11], triclinic symmetry of molecular packing in subcells of crystalline cores of tetracosane nano-lamellae was observed in the initial state at T = T room , i.e.…”

Section: Introductionmentioning

confidence: 99%

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Specificity of the Transformation of End Methyl Groups in the Interlamellar Regions of Tetracosane during the Solid-Solid Phase Transition as revealed by FTIR Spectroscopy

Marikhin

Gureva

Vlasova

2022

Physics of the Solid State

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The kinetics of the development of the first-order diffuse structural phase transition in monodisperse samples of tetracosane C24H50 was studied by FTIR spectroscopy. The temperature dependences of the frequencies and intensities of the C-H-stretching vibrations in the spectral region ν=2800-3000 cm-1 were studied for 4 different modes in the methylene CH2 trans sequences of the main chain and for 4 different modes corresponding to the end methyl CH3-groups. Specific changes in the vibrational frequencies of all investigated modes are found, which are caused by changes in the symmetry of the molecular packing during the first-order phase transition. Keywords: n-alkanes, phase transitions, theory of diffuse phase transitions, IR spectroscopy.

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Section: Frequencies Of Stretching C−h-vibrations CMsupporting

confidence: 57%

Section: Introductionmentioning

confidence: 99%

Specificity of the Transformation of End Methyl Groups in the Interlamellar Regions of Tetracosane during the Solid-Solid Phase Transition as revealed by FTIR Spectroscopy

Marikhin

Gureva

Vlasova

2022

Physics of the Solid State

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Insight into the formation mechanism of algal biofilm in soy sauce wastewater

Qian

Wan

et al. 2023

Journal of Cleaner Production

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Fabrication of visible-light response cadmium sulfide modified superhydrophobic surface for water resource remediation

et al. 2021

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Widespread concern has been attached to the frequent occurrence of pollution by oil slicks and watersoluble pollutants in recent years. The semiconductor photocatalysis is applied to sewage treatment owing to the advantages of energy-conserving and environmental protection. However, its application is limited by the defects of not solving oil slicks and the hard recyclability. In this paper, the high specific surface area and rod-shaped CdS were prepared using template and alkali-treated methods. Next, the alkylated SiO 2 and alkali-treated CdS were deposited on pure fabric by physical deposition to prepare the multifunctional superhydrophobic fabric. The specific surface area and morphology of alkali-treated CdS were tested by BET specific surface area test and field emission scanning electron microscope. Besides, oil/water separation, water contact angle, and stability test experiments were performed to determine the superhydrophobic performance. Photocatalysis degradation efficiency and cycle degradation stability of multifunctional fabric were characterized by photocatalysis degradation Rh B experiment. Consequently, the alkali-treated CdS displays a high specific surface up to 343 m 2 g −1 . The multifunctional fabric presents excellent superhydrophobic performance with the water contact angle up to 155°. Meanwhile, the water contact angle of multifunctional fabric is always over 150°under various circumstances (acid-base corrosion, soaking time at 100 °C and frictional numbers), indicating that the multifunctional fabric has excellent superhydrophobic stability. Moreover, the fabric also exhibits outstanding photocatalysis performance (the degradation efficiency is 94% after 3 cycles). Our work provides a feasible method for addressing oil slicks on water surface and degrading water-soluble pollutants with extensive application prospects in water resource remediation.

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Study of the Kinetics of the Phase Transition of the First Order in Tetracosane C24H50 by Fourier-Transform IR Spectroscopy

Cited by 7 publications

References 12 publications

Specificity of the Transformation of End Methyl Groups in the Interlamellar Regions of Tetracosane during the Solid-Solid Phase Transition as revealed by FTIR Spectroscopy

Specificity of the Transformation of End Methyl Groups in the Interlamellar Regions of Tetracosane during the Solid-Solid Phase Transition as revealed by FTIR Spectroscopy

Insight into the formation mechanism of algal biofilm in soy sauce wastewater

Fabrication of visible-light response cadmium sulfide modified superhydrophobic surface for water resource remediation

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