Dielectric Properties of Methanol Mixtures with Ethanol, Isomers of Propanol, and Butanol

Chmielewska, Agnieszka; Żurada, Małgorzata; Klimaszewski, Krzysztof; Bald, Adam

doi:10.1021/je800593p

Cited by 66 publications

(31 citation statements)

References 31 publications

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“…The determination coefficient (R 2 ) was 0.70, Antagonist effects of methanol/i-propanol mixtures were assigned probably to cohesive energy density increment associated to solvent-solvent attraction effect between the -OH groups (more structured) [47][48][49]. This might occur due to attractive relationships between methanol and i-propanol hydrogen bond acceptor and donator capacity, respectively, which would lead to a higher interaction between molecules of solvent reducing the solute solvation rate [45][46][47].…”

Section: Choice Of the Extraction Solventmentioning

confidence: 99%

Partial least squares model and design of experiments toward the analysis of the metabolome of Jatropha gossypifolia leaves: Extraction and chromatographic fingerprint optimization

Pilon

Neto

Freire

et al. 2016

J of Separation Science

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A major challenge in metabolomic studies is how to extract and analyze an entire metabolome. So far, no single method was able to clearly complete this task in an efficient and reproducible way. In this work we proposed a sequential strategy for the extraction and chromatographic separation of metabolites from leaves Jatropha gossypifolia using a design of experiments and partial least square model. The effect of 14 different solvents on extraction process was evaluated and an optimized separation condition on liquid chromatography was estimated considering mobile phase composition and analysis time. The initial conditions of extraction using methanol and separation in 30 min between 5 and 100% water/methanol (1:1 v/v) with 0.1% of acetic acid, 20 μL sample volume, 3.0 mL min(-1) flow rate and 25°C column temperature led to 107 chromatographic peaks. After the optimization strategy using i-propanol/chloroform (1:1 v/v) for extraction, linear gradient elution of 60 min between 5 and 100% water/(acetonitrile/methanol 68:32 v/v with 0.1% of acetic acid), 30 μL sample volume, 2.0 mL min(-1) flow rate, and 30°C column temperature, we detected 140 chromatographic peaks, 30.84% more peaks compared to initial method. This is a reliable strategy using a limited number of experiments for metabolomics protocols.

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Section: Choice Of the Extraction Solventmentioning

confidence: 99%

Partial least squares model and design of experiments toward the analysis of the metabolome of Jatropha gossypifolia leaves: Extraction and chromatographic fingerprint optimization

Pilon

Neto

Freire

et al. 2016

J of Separation Science

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“…The experimental procedure of viscosimetric and densimetric measurements was described in our previous papers [13][14][15][16]. The method of measuring relative permittivity was described in detail in our earlier work [20]. The uncertainty of the relative permittivity was estimated to be 0.1 %.…”

Section: Apparatus and Proceduresmentioning

confidence: 99%

Conductance studies of NaCl, KCl, NaBr, KBr, NaI, Bu4NI, and NaBPh4 in water + 2-propoxyethanol mixtures at 298.15 K

Bald

Kinart

2015

Ionics

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The molar conductances of sodium chloride (NaCl), potassium chloride (KCl), sodium bromide (NaBr), sodium iodide (NaI), tetrabutylammonium iodide (Bu 4 NI), and sodium tetraphenylborate (NaBPh 4 ) in water + 2-propoxyethanol binary mixtures at T=298.15 K were determined. Conductance values were analyzed using a lowconcentration chemical model (lcCM). The ionic conductivities of Na + , K + , Bu 4 N + , Cl − , I − , Br − , and BPh 4 − ions were determined using Fuoss-Hirsch's assumption. The dependencies of the values of limiting molar conductance (Λ o ), limiting ionic conductance of the individual anions (λ o ± ), and Walden products (Λ o ⋅η and λ o ± ⋅η) as a function of the composition of water+2-propoxyethanol binary mixtures were discussed.

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“…[1][2][3] The static permittivity has proven to be a useful property in characterizing molecular interaction and molecular ordering in solutions, as the value of dielectric permittivity is strongly related both to the chemical structure of a molecule and to intermolecular interactions. [4][5][6][7] By using dielectric data of binary liquid mixtures over a range of mole fractions and temperatures, it is possible to obtain valuable information regarding the nature and strength of interactions in liquid mixtures.…”

Section: Introductionmentioning

confidence: 99%

Dielectric studies of binary mixtures of ethylene glycol mono phenyl ether with 1-butanol at different temperatures

Chaube

Rana

2017

J. Adv. Dielect.

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Static permittivity ("), refractive index (n) and density () of binary mixtures of ethylene glycol mono phenyl ether (EGMPE) with 1-butanol (1-BuOH) over the entire range of mole fraction and at temperatures (T ¼ 303:15, 313.15 and 323.15 K) have been measured. From the experimental data, parameters such as excess static permittivity (" E ), excess permittivity at optical frequency (" E 1 ), effective Kirkwood correlation factor (g eff ), corrective Kirkwood correlation factor (g f ) and Bruggeman factor (f b ) have been calculated to obtain qualitative and quantitative information about the complex formation through H-bond in binary system. In order to predict the static permittivity of polar-polar binary mixtures six mixing rules were applied and for refractive index five mixing rule were applied. Experimental results of permittivity (") and refractive index (n) are compared with those obtained from theoretical calculations. Excess parameters were fitted to the Redlich-Kister type polynomial equation.

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Dielectric Properties of Methanol Mixtures with Ethanol, Isomers of Propanol, and Butanol

Cited by 66 publications

References 31 publications

Partial least squares model and design of experiments toward the analysis of the metabolome of Jatropha gossypifolia leaves: Extraction and chromatographic fingerprint optimization

Partial least squares model and design of experiments toward the analysis of the metabolome of Jatropha gossypifolia leaves: Extraction and chromatographic fingerprint optimization

Conductance studies of NaCl, KCl, NaBr, KBr, NaI, Bu4NI, and NaBPh4 in water + 2-propoxyethanol mixtures at 298.15 K

Dielectric studies of binary mixtures of ethylene glycol mono phenyl ether with 1-butanol at different temperatures

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