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Sharma A, Kruteva M, Zamponi M, Ehlert S, Richter DO, Förster S. Quasielastic neutron scattering reveals the temperature dependent rotational dynamics of densely grafted oleic acid.. J Chem Phys 2022; 156:164908. [DOI: 10.1063/5.0089874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We study the dynamics of pure oleic acid as well as grafted oleic acid synthesized by decomposing iron oleate into oleic acid grafted iron oxide nanoparticles. Our quasielastic neutron scattering study shows that oleic acid dominantly performs translational diffusion at room temperature. On the other hand, in nanocomposites the constraints imposed by grafting and crowding of neighbouring chains restrict the grafted oleic acid to uniaxial rotation. Interestingly, it also manifests mobility in grafted oleic acid below the crystallization temperature of pure oleic acid. The data from grafted oleic acid could be effectively described using uniaxial rotational diffusion model with an additional elastic scattering contribution. This kind of elastic scattering arises due to the restricted bond mobility and increases with decreasing temperature. The radius of rotation obtained from the fitted data agrees very well with the geometry of the molecule and grafting density. These results open possibilities of research on the confined surfactant systems, which could be analysed using the approach described here.
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Affiliation(s)
- Aakash Sharma
- Forschungszentrum Julich GmbH Julich Centre for Neutron Science, Germany
| | | | | | - Sascha Ehlert
- Forschungszentrum Jülich GmbH Jülich Centre for Neutron Science, Germany
| | | | - Stephan Förster
- Forschungszentrum Julich GmbH Julich Centre for Neutron Science, Germany
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Wiercigroch E, Szafraniec E, Czamara K, Pacia MZ, Majzner K, Kochan K, Kaczor A, Baranska M, Malek K. Raman and infrared spectroscopy of carbohydrates: A review. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017. [PMID: 28599236 DOI: 10.1002/jrs.4607] [Citation(s) in RCA: 565] [Impact Index Per Article: 80.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Carbohydrates are widespread and naturally occurring compounds, and essential constituents for living organisms. They are quite often reported when biological systems are studied and their role is discussed. However surprisingly, up till now there is no database collecting vibrational spectra of carbohydrates and their assignment, as has been done already for other biomolecules. So, this paper serves as a comprehensive review, where for selected 14 carbohydrates in the solid state both FT-Raman and ATR FT-IR spectra were collected and assigned. Carbohydrates can be divided into four chemical groups and in the same way is organized this review. First, the smallest molecules are discussed, i.e. monosaccharides (d-(-)-ribose, 2-deoxy-d-ribose, l-(-)-arabinose, d-(+)-xylose, d-(+)-glucose, d-(+)-galactose and d-(-)-fructose) and disaccharides (d-(+)-sucrose, d-(+)-maltose and d-(+)-lactose), and then more complex ones, i.e. trisaccharides (d-(+)-raffinose) and polysaccharides (amylopectin, amylose, glycogen). Both Raman and IR spectra were collected in the whole spectral range and discussed looking at the specific regions, i.e. region V (3600-3050cm-1), IV (3050-2800cm-1) and II (1200-800cm-1) assigned to the stretching vibrations of the OH, CH/CH2 and C-O/C-C groups, respectively, and region III (1500-1200cm-1) and I (800-100cm-1) dominated by deformational modes of the CH/CH2 and CCO groups, respectively. In spite of the fact that vibrational spectra of saccharides are significantly less specific than spectra of other biomolecules (e.g. lipids or proteins), marker bands of the studied molecules can be identified and correlated with their structure.
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Affiliation(s)
- Ewelina Wiercigroch
- Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland
| | - Ewelina Szafraniec
- Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland
| | - Krzysztof Czamara
- Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland
| | - Marta Z Pacia
- Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland
| | - Katarzyna Majzner
- Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland
| | - Kamila Kochan
- Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland
| | - Agnieszka Kaczor
- Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland
| | - Malgorzata Baranska
- Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland.
| | - Kamilla Malek
- Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland.
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Giannakas A, Patsaoura A, Barkoula NM, Ladavos A. A novel solution blending method for using olive oil and corn oil as plasticizers in chitosan based organoclay nanocomposites. Carbohydr Polym 2017; 157:550-557. [DOI: 10.1016/j.carbpol.2016.10.020] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 09/09/2016] [Accepted: 10/09/2016] [Indexed: 10/20/2022]
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Vlacha M, Giannakas A, Katapodis P, Stamatis H, Ladavos A, Barkoula NM. On the efficiency of oleic acid as plasticizer of chitosan/clay nanocomposites and its role on thermo-mechanical, barrier and antimicrobial properties – Comparison with glycerol. Food Hydrocoll 2016. [DOI: 10.1016/j.foodhyd.2016.01.003] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Liascukiene I, Aissaoui N, Asadauskas SJ, Landoulsi J, Lambert JF. Ordered nanostructures on a hydroxylated aluminum surface through the self-assembly of fatty acids. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:5116-5124. [PMID: 22353040 DOI: 10.1021/la2051542] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We investigate the mechanism of self-assembly of fatty acids (FA) and methyl oleate on an Al oxy-hydroxide surface with a view to deciphering the role and nature of interfacial processes (adsorption, chemical binding, molecular organization, etc.). For this purpose, we focus on parameters related to intrinsic properties of molecules, namely the level of unsaturation and the nature of the head group (carboxylic acid or ester). After the FA adsorption, the presence of coordinative bonded carboxylate species on the Al oxy-hydroxide surface is demonstrated by means of PM-IRRAS analysis. We observe that contact of methyl oleate with the surface leads to its chemical transformation through a saponification reaction. As a consequence, it binds to the surface in a manner similar to that for fatty acids. Through an innovative mode of atomic force microscopy (AFM), the organization of the adsorbed molecules is demonstrated. Our results reveal the existence of highly ordered nanostructures guided by the FA self-assembly. The size of these nanostructures was determined with accuracy, suggesting that it exceeds one FA monolayer. By contrast, no organization was observed with methyl oleate.
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Affiliation(s)
- Irma Liascukiene
- State Research Institute Center for Physical Sciences and Technology, Vilnius, Lithuania
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Gupta A, Agarwal P, Choudhary N, Tandon P, Gupta VD. Vibrational dynamics and heat capacity of polychloroprene. J Appl Polym Sci 2011. [DOI: 10.1002/app.33488] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Brozek-Pluska B, Jablonska-Gajewicz J, Kordek R, Abramczyk H. Phase transitions in oleic acid and in human breast tissue as studied by Raman spectroscopy and Raman imaging. J Med Chem 2011; 54:3386-92. [PMID: 21476494 DOI: 10.1021/jm200180f] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We present the results of differential scanning calorimetry (DSC) and Raman studies in the temperature range of 293-77 K on vibrational properties of the oleic acid and the human breast tissue as a function of temperature. We have found that vibrational properties are very sensitive indicators to specify phases and phase transitions at the molecular level. We have found that water content confined in the cancerous tissue is markedly different from that in the noncancerous tissue. The OH stretching vibrations of water are useful as potential Raman biomarkers to distinguish between the cancerous and the noncancerous human breast tissues. Our results provide experimental evidence on the role of lipid profile and cell hydration as factors of particular significance in differentiation of the noncancerous and cancerous breast tissues.
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Affiliation(s)
- Beata Brozek-Pluska
- Laboratory of Laser Molecular Spectroscopy, Institute of Applied Radiation Chemistry, Technical University of Lodz, Wroblewskiego 15, 93-590 Lodz, Poland
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Mishra S, Chaturvedi D, Kumar N, Tandon P, Siesler HW. An ab initio and DFT study of structure and vibrational spectra of gamma form of oleic acid: comparison to experimental data. Chem Phys Lipids 2009; 163:207-17. [PMID: 19941842 DOI: 10.1016/j.chemphyslip.2009.11.006] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2009] [Revised: 11/16/2009] [Accepted: 11/17/2009] [Indexed: 10/20/2022]
Abstract
Oleic acid (cis-9-octadecenoic acid) is the most abundant cis-unsaturated fatty acid in nature; it is distributed in almost all organisms. In this work, we present a detailed vibrational spectroscopy investigation of Oleic acid by using infrared and Raman spectroscopies. These data are supported by quantum mechanical calculations, which allow us to characterize completely the vibrational spectra of this compound. The equilibrium geometry, harmonic vibrational frequencies, infrared intensities and activities of Raman scattering were calculated by ab initio Hartree-Fock (HF) and density functional theory (DFT) employing B3LYP with complete relaxation in the potential energy surface using 6-311G(d, p) basis set. After a proper scaling the calculated wavenumbers show a very good agreement with the observed values. A complete vibrational assignment is provided for the observed Raman and infrared spectra of Oleic acid. In this work, we also investigate the deviation of vibrational wavenumbers computed with two quantum chemical methods (HF and B3LYP).
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Affiliation(s)
- Soni Mishra
- Department of Physics, University of Lucknow, Lucknow 226007, India
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