Log in

Relevant bibliographies by topics / Nonpolar solvents / Journal articles

To see the other types of publications on this topic, follow the link: Nonpolar solvents.

Journal articles on the topic 'Nonpolar solvents'

Author: Grafiati

Published: 18 May 2024

Last updated: 31 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Nonpolar solvents.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Roy, J. L., and W. B. McGill. "Flexible conformation in organic matter coatings: An hypothesis about soil water repellency." Canadian Journal of Soil Science 80, no. 1 (2000): 143–52. http://dx.doi.org/10.4141/s98-093.

Full text

Abstract:

Some soils develop severe water repellency several years or decades following oil contamination. We previously reported that soil water repellency is completely eliminated by extraction with amphiphilic solvents, but barely reduced by extraction with nonpolar solvents. We report here on solvent-induced reversible soil water repellency. Our results indicate that: (i) water repellency is completely eliminated following extraction with amphiphilic solvent, but partially restored following subsequent exposure to nonpolar, non-H-bonding solvent; (ii) extraction with nonpolar, non-H-bonding solvent

APA, Harvard, Vancouver, ISO, and other styles

2

Saita, Satoshi, Shin-ichi Takeda, and Hideya Kawasaki. "Hansen Solubility Parameter Analysis on Dispersion of Oleylamine-Capped Silver Nanoinks and their Sintered Film Morphology." Nanomaterials 12, no. 12 (2022): 2004. http://dx.doi.org/10.3390/nano12122004.

Full text

Abstract:

Optimizing stabilizers and solvents is crucial for obtaining highly dispersed nanoparticle inks. Generally, nonpolar (hydrophobic) ligand-stabilized nanoparticles show superior dispersibility in nonpolar solvents, whereas polar ligand (hydrophilic)-stabilized nanoparticles exhibit high dispersibility in polar solvents. However, these properties are too qualitative to select optimum stabilizers and solvents for stable nanoparticle inks, and researchers often rely on their experiences. This study presents a Hansen solubility parameter (HSP)-based analysis of the dispersibility of oleylamine-capp

APA, Harvard, Vancouver, ISO, and other styles

3

Pytela, Oldřich. "A new classification of solvents based on chemometric empirical scale of parameters." Collection of Czechoslovak Chemical Communications 55, no. 3 (1990): 644–52. http://dx.doi.org/10.1135/cccc19900644.

Full text

Abstract:

The paper presents a classification of 51 solvents based on clustering in three-dimensional space formed by the empirical scale of PAC, PBC, and PPC parameters designed for interpretation of solvent effect on a model with cross-terms. For the classification used are the clustering methods of the nearest neighbour, of the furthest neighbour, of average bond, and the centroid method. As a result, the solvents have been divided into 8 classes denoted as: I - nonpolar-inert solvents (aliphatic hydrocarbons), IIp - nonpolar-polarizable (aromatic hydrocarbons, tetrachloromethane, carbon disulphide),

APA, Harvard, Vancouver, ISO, and other styles

4

Suljkanović, Mersiha, Jasmin Suljagić, Edita Bjelić, Ante Prkić, and Perica Bošković. "Chemical Characterization of Terpene-Based Hydrophobic Eutectic Solvents and Their Application for Pb(II) Complexation during Solvent Extraction Procedure." Molecules 29, no. 9 (2024): 2122. http://dx.doi.org/10.3390/molecules29092122.

Full text

Abstract:

Solvents prepared from natural terpenes (menthol and thymol), as H-bond acceptors, and a series of organic acids (chain lengths of 8, 10, and 14 C atoms), as H-bond donors, were characterized and tested as reaction media for liquid–liquid extraction purposes. Due to their high hydrophobicity, they seem to be promising alternatives to conventional (nonpolar and toxic) solvents, since they possess relatively less toxic, less volatile, and consequently, more environmentally friendly characteristics. Assuming that the equilibrium is established between solvent and analyte during a ligandless proce

APA, Harvard, Vancouver, ISO, and other styles

5

Subandrate, Subandrate, Sadakata Sinulingga, Annes Claudia Adma та ін. "Effect of solvent polarity on secondary metabolite content and α-glucosidase enzyme IC50 of Dendrophthoe pentandra (L). Miq leaves extract". JURNAL ILMU KEFARMASIAN INDONESIA 22, № 1 (2024): 1. http://dx.doi.org/10.35814/jifi.v22i1.1363.

Full text

Abstract:

Cherry mistletoe (Dendrophthoe pentandra (L). Miq) have an inhibitory effect on the α-glucosidase enzyme, but research related to solvent optimization to find active compound is unclear. Secondary metabolites that can be identified depend on the level of solvent polarity. This study aims to determine the effect of solvent polarity on the secondary metabolite content and the α-glucosidase enzyme by using the polar and nonpolar fractions of the ethyl acetate extract of cherry mistletoe leaves. Cherry mistletoe leaves were extracted using ethyl acetate and were followed by a liquid-liquid fractio

APA, Harvard, Vancouver, ISO, and other styles

6

Al Mohaimeed, Rawabi M., Anees A. Ansari, and Abdullah Aldwayyan. "The Role of Solvent Environment on the Optical Behavior of Chemically Synthesized Silicon Nanoparticles." Journal of Spectroscopy 2018 (2018): 1–9. http://dx.doi.org/10.1155/2018/6870645.

Full text

Abstract:

Silicon nanoparticles (Si-NPs) were prepared by solution-based chemical etching method. Optical characteristics of the as-prepared Si-NPs were investigated in different polar and nonpolar organic solvents. The emission and absorption properties of Si-NPs were tuned by altering the environment (solvents). The variation in absorption coefficient was observed because of the solvent interaction nature of Si-NPs. Si-NPs in polar aprotic and nonpolar solvents manifested good luminescence under UV excitation. PL intensities were observed to be depending on etched cross-section area on wafer surface.

APA, Harvard, Vancouver, ISO, and other styles

7

Ghosh, Rajib, Amitabha Nandi, and Dipak K. Palit. "Solvent sensitive intramolecular charge transfer dynamics in the excited states of 4-N,N-dimethylamino-4′-nitrobiphenyl." Physical Chemistry Chemical Physics 18, no. 11 (2016): 7661–71. http://dx.doi.org/10.1039/c5cp07778h.

Full text

Abstract:

Solvent sensitive excited state dynamics of DNBP is explored. In polar solvents, the ultrafast barrierless TICT process is the major relaxation pathway, whereas, in nonpolar solvents the excited state undergoes the PICT process, followed by efficient intersystem crossing to the triplet state.

APA, Harvard, Vancouver, ISO, and other styles

8

Werst, D. W. "Solvent effects in nonpolar solvents: Radical anion reactions." Chemical Physics Letters 202, no. 1-2 (1993): 101–7. http://dx.doi.org/10.1016/0009-2614(93)85357-t.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Wu, Xiaoli, Xulin Cui, Qi Wang, et al. "Manipulating the cross-layer channels in g-C3N4 nanosheet membranes for enhanced molecular transport." Journal of Materials Chemistry A 9, no. 7 (2021): 4193–202. http://dx.doi.org/10.1039/d0ta10236a.

Full text

Abstract:

Cross-layer channels display ‘gate effect’ to govern molecular selectivity for lamellar membranes. Membranes with hydrophilic/hydrophobic heterostructured channels acquire elevated polar solvent permeance and polar/nonpolar solvents selectivity.

APA, Harvard, Vancouver, ISO, and other styles

10

Chhayarani, Jana, De Parameswar, and Ray P. "Effect of solvents on regioselectivity of anisole nitration." Journal of Indian Chemical Society Vol. 91, Jul 2014 (2014): 1373–77. https://doi.org/10.5281/zenodo.5726618.

Full text

Abstract:

Department of Chemical Engineering, University of Calcutta, 92, Acharya Prafulla Chandra Road, Kolkata-700 009, India E-mail : chhaya_samanta@rediffmail.com, parameswar_de@rediffmail.com, praycuce@rediffmail.com <em>Fax </em>: 91-33-23519755 <em>Manuscript received online 25 October 2013, accepted 13 February 2014</em> Nitration of anisole dissolved in different solvents with 70% (w/v) nitric acid was studied. Solvents were observed to strongly influence positional selectivity and rate of nitration. The <em>ortho/para</em> ratio remained virtually constant (~1.2) in nonpolar solvents, but vari

APA, Harvard, Vancouver, ISO, and other styles

11

Kovalenko, G. A., and L. V. Perminova. "Heterogeneous Biocatalytic Processes of the Low-Temperature Synthesis of Esters: Selection of Organic Solvent." Kataliz v promyshlennosti 20, no. 4 (2020): 313–22. http://dx.doi.org/10.18412/1816-0387-2020-4-313-322.

Full text

Abstract:

Processes of the low-temperature enzymatic synthesis of esters in nonaqueous media of organic solvents with participation of heterogeneous biocatalysts synthesized by the adsorption immobilization of a recombinant lipase from Thermomyces lanuginosus (Pichia pastoris producer) on macroporous carbon aerogel were investigated. The esterification reaction was conducted using individual organic solvents of different polarity, such as nonpolar ones (lоgP > 2.5) – hexadecane, hexane and toluene, and polar solvents (lоgP < 1) – diethyl ether, tert-butanol and acetone, as well as their binary mix

APA, Harvard, Vancouver, ISO, and other styles

12

Siplivy, Nickolay, and Anatoly Ivanov. "Features of the Electronic Structure of Excited Quadrupolar Molecules in Non-Polar Solvents." Mathematical Physics and Computer Simulation, no. 2 (July 2021): 68–84. http://dx.doi.org/10.15688/mpcm.jvolsu.2021.2.6.

Full text

Abstract:

Interactions of the electronic subsystem of the quadrupolar fluorophore with intramolecular highfrequency antisymmetric vibrations and solvent polarization are responsible for charge transfer symmetry breaking (SB), which is observed after optical excitation of such molecules in polar solvents. It is known that although these two interactions are mathematically described in similar ways, only the interaction of the fluorophore with solvent orientational polarization can create a state with broken symmetry if this interaction is strong enough. Nevertheless, the interaction of a quadrupolar fluo

APA, Harvard, Vancouver, ISO, and other styles

13

Chen, Gang, Mingzhu Xia, Wu Lei, Fengyun Wang, and Xuedong Gong. "Molecular dynamics investigation of the effect of solvent adsorption on crystal habits of hexogen." Canadian Journal of Chemistry 92, no. 9 (2014): 849–54. http://dx.doi.org/10.1139/cjc-2014-0243.

Full text

Abstract:

In this work, a molecular dynamics investigation was performed to study the effect of the solvents acetone and cyclohexanone on the crystal habits of hexogen. The results show that the adsorption energies of hexogen polar faces such as the (002), (210), (111), and (200) faces are larger than that of the nonpolar (020) face. The adsorption interactions of hexogen surfaces with acetone are stronger than those with cyclohexanone. The adsorption interactions consist of van der Waals and electrostatic interactions. The effect of solvents on the crystal growth of hexogen is discussed by comparing th

APA, Harvard, Vancouver, ISO, and other styles

14

Nevěčná, Taťjana, Vojtěch Bekárek, and Oldřich Pytela. "A Study of Effects of Temperature and Medium on Reaction of Triethylamine with Ethyl Bromide." Collection of Czechoslovak Chemical Communications 59, no. 6 (1994): 1384–91. http://dx.doi.org/10.1135/cccc19941384.

Full text

Abstract:

The rate constants of reaction of triethylamine with ethyl bromide have been measured in 13 solvents at the temperatures of 293, 313, 333, and 373 K. The activation entropies in the individual solvents increase when going from nonpolar to dipolar aprotic and polar protic solvents, which is explained by dominant solvation of the basic triethylamine and by formation of highly ordered associates without solvent in the activated complex in nonpolar solvent media. No isokinetic relationship has been found between the activation entropy and activation enthalpy, which indicates different solvent effe

APA, Harvard, Vancouver, ISO, and other styles

15

YOGESHRI J. JIBHKATE, ABHIJIT P. AWACHAT, R.T. LOHIYA, MILIND J UMEKAR, ATUL T. HEMKE, and KRISHNA R. GUPTA. "Extraction: An important tool in the pharmaceutical field." International Journal of Science and Research Archive 10, no. 1 (2023): 555–68. http://dx.doi.org/10.30574/ijsra.2023.10.1.0768.

Full text

Abstract:

The present review discuss various extraction methods used in obtaining bioactive compounds from medicinal plants. It defines key terms like "medicinal plant," "menstruum," and "marc." The choice of solvent (menstruum) depends on plant type and bioactive compounds. Polar solvents (e.g., water) are used for polar compounds, while nonpolar solvents (e.g., hexane) are used for nonpolar compounds. Solvents are categorized by polarity from least polar (n-hexane) to most polar (water). Different extraction methods are detailed, including infusion, decoction, percolation, maceration, Soxhlet extracti

APA, Harvard, Vancouver, ISO, and other styles

16

Hsu, M. F., E. R. Dufresne, and D. A. Weitz. "Charge Stabilization in Nonpolar Solvents." Langmuir 21, no. 11 (2005): 4881–87. http://dx.doi.org/10.1021/la046751m.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Graziano, Giuseppe. "Size dependence of the solubility of nonpolar compounds in different solvents." Canadian Journal of Chemistry 80, no. 4 (2002): 401–12. http://dx.doi.org/10.1139/v02-040.

Full text

Abstract:

At 25°C, plots of the standard Gibbs energy change associated with the solvation of noble gases and aliphatic hydrocarbons vs. the size of the solutes prove to be approximately linear with a negative slope for common organic solvents but not for water. In the latter case, the plot has a characteristic V-shape. The slope is negative for noble gases, methane, and ethane, but is positive for larger alkanes. This means that the solubility of nonpolar solutes increases with solute size in every solvent except water. The solvation thermodynamics of noble gases and aliphatic hydrocarbons in five solv

APA, Harvard, Vancouver, ISO, and other styles

18

Bekárek, Vojtěch, Jan Jílek, and Antonín Haviger. "Effect of Medium on the Electronic Spectra of 2-Nitroaniline Derivatives." Collection of Czechoslovak Chemical Communications 61, no. 1 (1996): 155–59. http://dx.doi.org/10.1135/cccc19960155.

Full text

Abstract:

The wavenumbers of the long-wavelength absorption band were measured for nine 4-substituted and 5-substituted derivatives of 2-nitroaniline in the gaseous state and in 13 solvents where only nonspecific solvent-solute interactions can be expected. For the series involving all the solvents used, the solvent effects can be well expressed by an one-parameter equation involving the product of the Born functions of the relative permittivity and of the refractive index of the solvent. For the series involving the nonpolar solvents and the gaseous state only, this equation reduces to an one-parameter

APA, Harvard, Vancouver, ISO, and other styles

19

Aniceto, José P. S., Bruno Zêzere, and Carlos M. Silva. "Predictive Models for the Binary Diffusion Coefficient at Infinite Dilution in Polar and Nonpolar Fluids." Materials 14, no. 3 (2021): 542. http://dx.doi.org/10.3390/ma14030542.

Full text

Abstract:

Experimental diffusivities are scarcely available, though their knowledge is essential to model rate-controlled processes. In this work various machine learning models to estimate diffusivities in polar and nonpolar solvents (except water and supercritical CO2) were developed. Such models were trained on a database of 90 polar systems (1431 points) and 154 nonpolar systems (1129 points) with data on 20 properties. Five machine learning algorithms were evaluated: multilinear regression, k-nearest neighbors, decision tree, and two ensemble methods (random forest and gradient boosted). For both p

APA, Harvard, Vancouver, ISO, and other styles

20

Ahmed, Asmaa N. "A study of the solvent effect on the low temperature spectra of benzoanthracene molecules." Iraqi Journal of Physics (IJP) 12, no. 24 (2019): 1–9. http://dx.doi.org/10.30723/ijp.v12i24.315.

Full text

Abstract:

been taken at room temperature down to liquid nitrogen temperature (77K). Polar and nonpolar solvents have been used to study the solvent effect on the absorption and fluorescence spectra of solute molecules. Some of the spectroscopic parameters have been determined as functions of solvent polarity and temperature. The results indicate that the band width FWHM increases with increasing the solvent polarity and temperature, while the peak emission cross section decreases with increasing of solvent polarity and decreases with increasing the temperatures. Clear vibrational structure spectra of be

APA, Harvard, Vancouver, ISO, and other styles

21

Wang, Yan-zhen, Hai-long Xu, Li Gao, Meng-meng Yan, Hong-ling Duan, and Chun-min Song. "Regeneration of Spent Lubricant Refining Clays by Solvent Extraction." International Journal of Chemical Engineering 2015 (2015): 1–7. http://dx.doi.org/10.1155/2015/207095.

Full text

Abstract:

Step-by-step solvent extraction was used to regenerate spent clay by recovering the adsorbed oil in lubricating oil refining clay. Several polar and nonpolar solvents were tested, and petroleum ether (90–120°C) and ethanol (95 v%) were selected as the nonpolar and polar solvents, respectively. The spent clay was first extracted using petroleum ether (90–120°C) to obtain ideal oil and then extracted with a mixed solvent of petroleum ether (90–120°C) and ethanol (95 v%) two or three times to obtain nonideal oil before being extracted with ethanol and water. Finally, the clay was dried at 130°C t

APA, Harvard, Vancouver, ISO, and other styles

22

Tant, Martin R., Garth L. Wilkes, and Joseph P. Kennedy. "Sulfonated polyisobutylene telechelic ionomers. XIII. Viscosity behavior in nonpolar solvents and nonpolar–polar solvent mixtures." Journal of Applied Polymer Science 37, no. 10 (1989): 2873–95. http://dx.doi.org/10.1002/app.1989.070371008.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Yang, Fulin, Shuangjie Zhang, Tanxiao Shen, et al. "Polymerization of 1-chloro-2-phenylacetylene derivatives by using a Brookhart-type catalyst." Polymer Chemistry 10, no. 35 (2019): 4801–9. http://dx.doi.org/10.1039/c9py00974d.

Full text

Abstract:

A Brookhart-type catalyst (α-diimine)PdMeCl/AgOTf works well in the polymerization of 1-chloro-2-phenylacetylene monomers bearing nonpolar/polar and electron releasing/withdrawing substituents in nonpolar/polar solvents.

APA, Harvard, Vancouver, ISO, and other styles

24

Bekárek, Vojtěch. "A comment on evaluation of effects of mixed solvents by means of the Born and Kirkwood method." Collection of Czechoslovak Chemical Communications 54, no. 12 (1989): 3162–70. http://dx.doi.org/10.1135/cccc19893162.

Full text

Abstract:

The evaluation of the mixed solvent effect by means of the Kirkwood and Born functions of the relative permitivity of the mixed solvent has been criticized as a thermodynamically inconsistent procedure. A procedure has been suggested to estimate the composition of solvation sphere around dipolar molecules or transition states in binary mixtures of a polar and a nonpolar solvents.

APA, Harvard, Vancouver, ISO, and other styles

25

Chen, Mei, Tongtong Jin, Binbin Nian, and Wenjun Cheng. "Solvent Tolerance Improvement of Lipases Enhanced Their Applications: State of the Art." Molecules 29, no. 11 (2024): 2444. http://dx.doi.org/10.3390/molecules29112444.

Full text

Abstract:

Lipases, crucial catalysts in biochemical synthesis, find extensive applications across industries such as food, medicine, and cosmetics. The efficiency of lipase-catalyzed reactions is significantly influenced by the choice of solvents. Polar organic solvents often result in a decrease, or even loss, of lipase activity. Conversely, nonpolar organic solvents induce excessive rigidity in lipases, thereby affecting their activity. While the advent of new solvents like ionic liquids and deep eutectic solvents has somewhat improved the activity and stability of lipases, it fails to address the fun

APA, Harvard, Vancouver, ISO, and other styles

26

Yang, Dapeng, Min Jia, Jingyuan Wu, Xiaoyan Song, and Qiaoli Zhang. "An analogy study on ESIPT reaction for 3BHC sensor between polar DMF and nonpolar toluene." Canadian Journal of Chemistry 95, no. 12 (2017): 1303–7. http://dx.doi.org/10.1139/cjc-2017-0463.

Full text

Abstract:

A comparison about excited state intramolecular proton transfer (ESIPT) mechanism of a new sensor 3-(1,3-benzothiazol-2-yl)-2-hydroxynaphthalene-1-carbaldehyde (3BHC) in polar solvent dimethylformamide (DMF) and nonpolar solvent toluene have been investigated within the framework of the time-dependent density functional theory (TD-DFT) method. The reproduced previous experimental absorption and emission spectra via our calculations reveals the reasonability of the DFT and TD-DFT theoretical level. The staple bond lengths, bond angles, and corresponding infrared vibrational spectra demonstrate

APA, Harvard, Vancouver, ISO, and other styles

27

Zhang, Yimeng, Pengyao Xing, Minmin Yang, et al. "Solvent-polarity-tuned nanostructures assembled from modified octadecylcarbamate with an anthracen moiety." RSC Advances 6, no. 76 (2016): 71963–69. http://dx.doi.org/10.1039/c6ra14563a.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Fuchs, Richard, Eric J. Chambers, and W. Kirk Stephenson. "Enthalpies of interaction of nonpolar solutes with nonpolar solvents. The role of solute polarizability and molar volume in solvation." Canadian Journal of Chemistry 65, no. 11 (1987): 2624–27. http://dx.doi.org/10.1139/v87-433.

Full text

Abstract:

Heats of solution of 10 nonpolar solutes (carbon tetrachloride, perfluoroheptane, diiodomethane, benzene, hexane, decane, hexadecane, cyclohexane, toluene, and mesitylene) in 11 nonpolar solvents (heptane, cyclohexane, carbon tetrachloride, benzene, carbon disulfide, diiodomethane, toluene, mesitylene, tetrachloroethylene, 1,1,2-trichlorotrifluoroethane, and hexadecane) have been combined with solute heats of vaporization to give enthalpies of transfer from vapor to solvent (ΔH(v → S)). The heat of vaporization of diiodomethane has been measured (11.70 ± 0.01 kcal/mol). Correlations of the for

APA, Harvard, Vancouver, ISO, and other styles

29

Celaya, Liliana, and Nicolás Kolb Koslobsky. "Effect of Ethyl Acetate on the Defatting of Leaves in the Extraction of Stevia rebaudiana Bertoni." Food Technology and Biotechnology 62, no. 3 (2024): 354–60. http://dx.doi.org/10.17113/ftb.62.03.24.8492.

Full text

Abstract:

Research background. The process for producing purified steviol glycosides from Stevia rebaudiana leaves (stevia) generally involves pretreatments, extraction, purification and crystallization. Pre-extraction or defatting can sometimes be a part of this process. It can remove impurities of low polarity, such as chlorophyll and fatty compounds. Nonpolar solvents can be used to defat stevia leaves. Experimental approach. In this study, we investigated ethyl acetate as a pre-extraction solvent for the defatting of dried and crushed stevia leaves. We compared pure ethyl acetate and water-saturated

APA, Harvard, Vancouver, ISO, and other styles

30

Farrokhbin, Mojtaba, Biljana Stojimirović, Marco Galli, Mohsen Khajeh Aminian, Yannick Hallez, and Gregor Trefalt. "Surfactant mediated particle aggregation in nonpolar solvents." Physical Chemistry Chemical Physics 21, no. 35 (2019): 18866–76. http://dx.doi.org/10.1039/c9cp01985e.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Castejón, Natalia, Pilar Luna, and Francisco Javier Señoráns. "Ultrasonic Removal of Mucilage for Pressurized Liquid Extraction of Omega-3 Rich Oil from Chia Seeds (Salvia hispanica L.)." Journal of Agricultural and Food Chemistry 65, no. 12 (2017): 2572–79. https://doi.org/10.1021/acs.jafc.6b05726.

Full text

Abstract:

Chia (Salvia hispanica L.) seeds contain an important amount of edible oil rich in omega-3 fatty acids. Fast and alternative extraction techniques based on polar solvents, such as ethanol or water, have become relevant for oil extraction in recent years. However, chia seeds also contain a large amount of soluble fiber or mucilage, which makes difficult an oil extraction process with polar solvents. For that reason, the aim of this study was to develop a gentle extraction method for mucilage in order to extract chia oil with polar solvents using pressurized liquids and compare with organic solv

APA, Harvard, Vancouver, ISO, and other styles

32

Lamothe, S., K. L. Cook, and T. H. Chan. "Chiral organosilicon compounds in synthesis. Preparation and stereoselective alkylations of silylcinnamyl carbanions." Canadian Journal of Chemistry 70, no. 6 (1992): 1733–42. http://dx.doi.org/10.1139/v92-217.

Full text

Abstract:

Silylallyl carbanions of type 13 bearing a chiral lithium complexing substituent remote from silicon can be alkylated regio- and stereoselectively at the α-position by small electrophiles in nonpolar solvents. The regiochemical outcome of the reaction was found to be highly dependent on the size of the incoming electrophile. Secondary alkyl halides react preferentially at the γ-center and good levels of stereoselectivity are still obtained in nonpolar solvents despite the rather long distance between the reacting center and the chiral auxiliary. Transformation of the alkylated allylsilanes int

APA, Harvard, Vancouver, ISO, and other styles

33

Xu, Zhuang, Mengli Li, Guowang Shen, et al. "Solvent Effects in the Preparation of Catalysts Using Activated Carbon as a Carrier." Nanomaterials 13, no. 3 (2023): 393. http://dx.doi.org/10.3390/nano13030393.

Full text

Abstract:

The role of solvents is crucial in catalyst preparation. With regard to catalysts prepared with activated carbon (AC) as the carrier, when water is used as a solvent it is difficult for the solution to infiltrate the AC. Because AC comprises a large number of C atoms and is a nonpolar material, it is more effective for the adsorption of nonpolar substances. Since the water and active ingredients are polar, they cannot easily infiltrate AC. In this study, the dispersion of the active component was significantly improved by optimizing the solvent, and the particle size of the active component wa

APA, Harvard, Vancouver, ISO, and other styles

34

Holroyd, Richard A. "Electron attachment to C60 in nonpolar solvents." Radiation Physics and Chemistry 72, no. 2-3 (2005): 79–84. http://dx.doi.org/10.1016/j.radphyschem.2004.09.002.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Yablon, Dalia G., and Alan M. Schilowitz. "Solvatochromism of Nile Red in Nonpolar Solvents." Applied Spectroscopy 58, no. 7 (2004): 843–47. http://dx.doi.org/10.1366/0003702041389328.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Aleksandrovа, Е. А., B. L. Aleksandrov, Zh T. Khadisova, Kh Kh Akhmadova, and L. Sh Makhmudova. "Crystallization and Structural Solidification of Paraffins in Various Solvents." Chemistry and Technology of Fuels and Oils 624, no. 2 (2021): 25–29. http://dx.doi.org/10.32935/0023-1169-2021-624-2-25-29.

Full text

Abstract:

The temperatures of the beginning of crystallization and solidification of solutions of petroleum and synthetic paraffins of different concentrations in nonpolar and weakly polar hydrocarbon solvents of different composition and viscosity are studied. It is shown that paraffins of different origin and hydrocarbon composition, with similar melting points, have slightly different crystallization temperatures аnd solidification in this solvent. The temperature range between the temperatures of the beginning of crystallization and solidification of the studied paraffin solutions is established.

APA, Harvard, Vancouver, ISO, and other styles

37

Arivalagan, Premkumar Rathinam, and Yan Zhao. "Interfacial catalysis of aldol reactions by prolinamide surfactants in reverse micelles." Organic & Biomolecular Chemistry 13, no. 3 (2015): 770–75. http://dx.doi.org/10.1039/c4ob02074j.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Guerdouh, Amel, and Djamel Barkat. "Experimental study of the extraction of chromium (III) from nitrate medium by lauric acid." Metallurgical and Materials Engineering 24, no. 3 (2018): 189–97. http://dx.doi.org/10.30544/385.

Full text

Abstract:

The solvent extraction of chromium (III) with lauric acid (HL) at 25°C is studied as a function of various parameters: pH of the aqueous phase, the concentration of lauric acid and the nature of the solvent. The solvent effects on the extraction of chromium (III) using polar and nonpolar solvents has been observed. It was shown that extracted species of the [Cr(OH)L2·2HL] formula are formed in cyclohexane, dichloromethane, chloroform, and toluene. However, in 1- -octanol or methyl isobutyl ketone, it was found a complex of the type [Cr(OH)L2]. The extraction constants and extraction yield (%E)

APA, Harvard, Vancouver, ISO, and other styles

39

Smith, Gregory N., James E. Hallett, and Julian Eastoe. "CelebratingSoft Matter's 10th Anniversary: Influencing the charge of poly(methyl methacrylate) latexes in nonpolar solvents." Soft Matter 11, no. 41 (2015): 8029–41. http://dx.doi.org/10.1039/c5sm01190f.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Tikhonov, D. A., and G. N. Sarkisov. "Local structure of solvation of nonpolar chains in nonpolar solvents at infinite dilution." Journal of Structural Chemistry 37, no. 4 (1996): 639–44. http://dx.doi.org/10.1007/bf02437178.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Wu, Minghong, Jing Zhan, Bijiang Geng, et al. "Scalable synthesis of organic-soluble carbon quantum dots: superior optical properties in solvents, solids, and LEDs." Nanoscale 9, no. 35 (2017): 13195–202. http://dx.doi.org/10.1039/c7nr04718e.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Cho, Dae Won, and Dae Won Cho. "Excimer and exciplex emissions of 1,8-naphthalimides caused by aggregation in extremely polar or nonpolar solvents." New J. Chem. 38, no. 6 (2014): 2233–36. http://dx.doi.org/10.1039/c3nj01473h.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Wildervanck, Martijn J., Reinhard Hecht, and Agnieszka Nowak-Król. "Synthesis and Strong Solvatochromism of Push-Pull Thienylthiazole Boron Complexes." Molecules 27, no. 17 (2022): 5510. http://dx.doi.org/10.3390/molecules27175510.

Full text

Abstract:

The solvatochromic behavior of two donor-π bridge-acceptor (D-π-A) compounds based on the 2-(3-boryl-2-thienyl)thiazole π-linker and indandione acceptor moiety are investigated. DFT/TD-DFT calculations were performed in combination with steady-state absorption and emission measurements, along with electrochemical studies, to elucidate the effect of two different strongly electron-donating hydrazonyl units on the solvatochromic and fluorescence behavior of these compounds. The Lippert–Mataga equation was used to estimate the change in dipole moments (Δµ) between ground and excited states based

APA, Harvard, Vancouver, ISO, and other styles

44

Baranchikov, Alexander E., Mikhail I. Razumov, Svetlana V. Kameneva, et al. "Facile Synthesis of Stable Cerium Dioxide Sols in Nonpolar Solvents." Molecules 27, no. 15 (2022): 5028. http://dx.doi.org/10.3390/molecules27155028.

Full text

Abstract:

A method is proposed for the preparation of stable sols of nanocrystalline cerium dioxide in nonpolar solvents, based on surface modification of CeO2 nanoparticles obtained by thermal hydrolysis of concentrated aqueous solutions of ammonium cerium(IV) nitrate with residues of 2-ethylhexanoic and octanoic acids. The synthesis was carried out at temperatures below 100 °C and did not require the use of expensive and toxic reagents. An assessment of the radical-scavenging properties of the obtained sols using the superoxide anion-radical neutralization model revealed that they demonstrate notable

APA, Harvard, Vancouver, ISO, and other styles

45

Nezbeda, Ivo, and Michael Rouha. "Extended excluded volume: Its origin and consequences." Pure and Applied Chemistry 85, no. 1 (2012): 201–10. http://dx.doi.org/10.1351/pac-con-12-04-04.

Full text

Abstract:

In contrast to the common intuitive/speculative approach based on an analysis of thermodynamic or structural data of (nonpolar) fluids, the statistical mechanical approach is used to extend the excluded volume concept to all other types of fluids. The (extended) excluded volume incorporates, in addition to common nonelectrostatic interactions defining the shape and size of the molecules, also the short-range part of the repulsive interactions between the embedded Coulombic sites. In this study we show that the extended excluded volume concept correctly predicts the behavior of the partial mola

APA, Harvard, Vancouver, ISO, and other styles

46

Xing, Xiaoyu, and Yan Zhao. "Intramolecularly enhanced molecular tweezers with unusually strong binding for aromatic guests in unfavorable solvents." Organic & Biomolecular Chemistry 16, no. 21 (2018): 3885–88. http://dx.doi.org/10.1039/c8ob00786a.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Kapoor, Utkarsh, and Jindal K. Shah. "Effect of molecular solvents of varying polarity on the self-assembly of 1-n-dodecyl-3-methylimidazolium octylsulfate ionic liquid." Journal of Theoretical and Computational Chemistry 17, no. 03 (2018): 1840004. http://dx.doi.org/10.1142/s0219633618400047.

Full text

Abstract:

Large-scale molecular dynamics simulations consisting of more than 88,000–106,000 atoms for approximately 250 ns (including equilibration and production) were conducted to assess the effect of polar, nonpolar and amphiphilic molecular solvents on the nanoscale structuring of 1-[Formula: see text]-dodecyl-3-methylimidazolium [C[Formula: see text]mim] octylsulfate [C8SO4] ionic liquid (IL). Water [H2O], [Formula: see text]-octane [C8H[Formula: see text]] and 1-octanol [C8H[Formula: see text]OH] are employed as examples of polar, nonpolar, and amphiphilic molecules, respectively. The results indi

APA, Harvard, Vancouver, ISO, and other styles

48

Jen, Myungsam, Sebok Lee, and Yoonsoo Pang. "Excited‐State Dynamics of All‐trans‐Retinal Investigated by Time‐resolved Electronic and Vibrational Spectroscopy^#." Bulletin of the Korean Chemical Society 36, no. 3 (2015): 900–905. http://dx.doi.org/10.1002/bkcs.10168.

Full text

Abstract:

Time‐resolved electronic and vibrational spectroscopy has been applied to understand ultrafast excited state dynamics of all‐trans‐retinal. Femtosecond transient absorption spectroscopy provides an overview of the excited‐state dynamics of all‐trans‐retinal, and femtosecond‐stimulated Raman and infrared absorption measurements, which have not been reported previously, provide further details of the structural changes in the excited states. Three singlet excited states and one triplet excited state have been identified from these experimental results, which are in good agreement with many previ

APA, Harvard, Vancouver, ISO, and other styles

49

Reichardt, Christian, Stefan Löbbecke, Abdol Mohammed Mehranpour, and Gerhard Schäfer. "Pyridinium N-phenoxide betaines and their application to the determination of solvent polarities, XXIV. Syntheses and UV-vis spectroscopic properties of new lipophilic tert-butyl- and 1-adamantyl substituted, negatively solvatochromic pyridinium N-phenolate betaine dyes." Canadian Journal of Chemistry 76, no. 6 (1998): 686–94. http://dx.doi.org/10.1139/v98-019.

Full text

Abstract:

Syntheses and negative solvatochromism of two new lipophilic pentaphenyl pyridinium N-phenolate betaine dyes, substituted with seven tert-butyl groups (9) or with three tert-butyl and two 1-adamantyl groups (13) in the peripheral phenyl rings, are described in order to get zwitterionic dyes that are more soluble in nonpolar solvents such as the standard betaine dye, 1, which has been used for the construction of an empirical scale of solvent polarity, called the ET(30) scale.Key words: betaine dyes, ET(30) values, lipophilic dyes, pyridinium N-phenolate betaine dyes, solvatochromism, solvent p

APA, Harvard, Vancouver, ISO, and other styles

50

Qamhieh, Khawla. "Effect of Dielectric Constant on the Zeta Potential of Spherical Electric Double Layers." Molecules 29, no. 11 (2024): 2484. http://dx.doi.org/10.3390/molecules29112484.

Full text

Abstract:

Zeta potential refers to the electrokinetic potential present in colloidal systems, exerting significant influence on the diverse properties of nano-drug delivery systems. The impact of the dielectric constant on the zeta potential and charge inversion of highly charged colloidal particles immersed in a variety of solvents spanning from polar, such as water, to nonpolar solvents and in the presence of multivalent salts was investigated through primitive Monte Carlo (MC) model simulations. Zeta potential, ξ, is decreased with the decreasing dielectric constant of the solvent and upon further in

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!