Thermophysical Properties Analysis of Poly (Ethylene Glycol) 600 + Methanol, Ethanol, 1-Propanol, and 2-Propanol Binary Liquid Mixtures

Mousavi, Zohreh; Pirdashti, Mohsen; Rostami, Abbas Ali; Drăgoi, Elena Niculina

doi:10.1007/s10765-019-2600-7

Cited by 23 publications

(11 citation statements)

References 71 publications

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“…Density and refractive index measurements were used to check the purity of the substances with a close agreement between the measured and literature data. − As can be seen from Table , the obtained experimental physicochemical data lie within the range of the literature values. The observed differences between the measured and reported data fall inside the expected uncertainties of both measured and reported values.…”

Section: Methodssupporting

confidence: 60%

Ternary Liquid-Phase Equilibria of an Azeotropic Mixture (Heptane + Isopropyl Alcohol) with Deep Eutectic Solvents

Gilani¹,

Sardroodi

Mohammadi-Khanghah³

et al. 2022

J. Chem. Eng. Data

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The present study reports the result of the measurement and analysis of the solubility curve and tie-line data of four ternary systems containing heptane−isopropyl alcohol azeotrope mixtures and deep eutectic solvents (DESs) at T = 298.2 K and p = 0.1 MPa. This investigation is aimed to evaluate the efficiency of the prepared DESs as extractants in the separation of the heptane−alcohol azeotropic mixtures through liquid−liquid extraction (LLE) processes. In this study, four choline chloridebased DESs were prepared by a heating process. Two hydrogen bond donor (HBD) compounds (i.e., ethylene glycol and propylene glycol) were chosen in the preparation of the DESs. The solubility curves show that the effect of DESs on the immiscibility region is small. The studied systems display the type-1 LLE behavior. The measured tie-line values were adequately fitted through the nonrandom two-liquid (NRTL) thermodynamic model, and the interaction parameter values were determined. The correlation data appeared to be in good agreement with the measured tie-lie data. The extraction capacity (distribution constants and selectivities) of the studied DESs was determined. The DESs had high and similar selectivity values for the studied systems. Moreover, the distribution constants were larger than unity, indicating a favorable solvent-to-feed ratio.

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Section: Methodssupporting

confidence: 60%

Ternary Liquid-Phase Equilibria of an Azeotropic Mixture (Heptane + Isopropyl Alcohol) with Deep Eutectic Solvents

Gilani¹,

Sardroodi

Mohammadi-Khanghah³

et al. 2022

J. Chem. Eng. Data

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“…For smaller molar mass, as it is the case of PEG 600 (average molar mass of 600 g mol −1 ), available data correspond mainly to properties for the liquid phase only. For instance, density measurements are provided by several authors [15,16,17,18], but they are given only for the liquid phase for few temperature values, not sufficient to obtain the thermal expansion coefficient. Some properties of PEG 600 are also given by Lane [19] who focuses on properties of several PCMs.…”

Section: Introductionmentioning

confidence: 99%

Thermal characterization of polyethylene glycol 600 in liquid and solid phase and across the phase transition

et al. 2022

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“…The fluorescence intensity ratio I 470/400 of excimer emission (at 470 nm) and monomer emission (at 400 nm) was measured as a function of (D) the solvent polarity parameter E T (30) and (E) the viscosity of methanol/PEG 600 mixtures ([Pyr-A] = 1.0 μM; excitation wavelength, 358 nm). Viscosities of the solvent mixtures were calculated from the molar fraction of PEG 600, based on the relationship reported previously ( Mousavi et al., 2020 ). …”

Section: Resultsmentioning

confidence: 99%

“…The excimer emission was more prominent in polar aprotic solvents with lower viscosities, such as acetonitrile (3.4 × 10 −4 Pa∙s) and acetone (3.0 × 10 −4 Pa∙s), than in more polar protic solvents with higher viscosities, such as 1-propanol (2.8 × 10 −3 Pa∙s) and 1-octanol (7.4 × 10 −3 Pa∙s). The influence of solvent viscosity was examined for binary mixtures of methanol and polyethylene glycol 600 (PEG 600), whose viscosities increase monotonically as a function of the molar fraction of PEG 600 ( Mousavi et al., 2020 ), but whose E T (30) values remain almost unchanged (54.2–55.4). The value of I 470/400 was found to decrease with increasing viscosity of the solvent mixtures ( Figure 2 E), indicating that the ratio of monomer and excimer fluorescence emissions of Pyr-A is sensitive to both the polarity and viscosity of its surrounding environment.…”

Section: Resultsmentioning

confidence: 99%

A light-switching pyrene probe to detect phase-separated biomolecules

et al. 2021

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Summary Biomolecules may undergo liquid–liquid phase separation (LLPS) to spatiotemporally compartmentalize and regulate diverse biological processes. Because the number of tools to directly probe LLPS is limited (ie. FRAP, FRET, fluorescence microscopy, fluorescence anisotropy, circular dichroism, etc.), the physicochemical traits of phase-separated condensates remain largely elusive. Here, we introduce a light-switching dipyrene probe (Pyr-A) that forms monomers in either hydrophobic or viscous environments, and intramolecular excimers in aqueous solutions. By exploiting their distinct fluorescence emission spectra, we used fluorescent microscopic imaging to study phase-separated condensates formed by in vitro protein droplets and membraneless intracellular organelles (centrosomes). Ratiometric measurement of excimer and monomer fluorescence intensities showed that protein droplets became hydrophobic and viscous as their size increased. Moreover, centrosomes became hydrophobic and viscous during maturation. Our results show that Pyr-A is a valuable tool to characterize LLPS and enhance our understanding of phase separation underlying biological functions.

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Thermophysical Properties Analysis of Poly (Ethylene Glycol) 600 + Methanol, Ethanol, 1-Propanol, and 2-Propanol Binary Liquid Mixtures

Cited by 23 publications

References 71 publications

Ternary Liquid-Phase Equilibria of an Azeotropic Mixture (Heptane + Isopropyl Alcohol) with Deep Eutectic Solvents

Ternary Liquid-Phase Equilibria of an Azeotropic Mixture (Heptane + Isopropyl Alcohol) with Deep Eutectic Solvents

Thermal characterization of polyethylene glycol 600 in liquid and solid phase and across the phase transition

A light-switching pyrene probe to detect phase-separated biomolecules

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