Critical asymmetry of liquid–liquid coexistence curve of binary mixture nitromethane+3-pentanol

Shi, Shaoxiong; Xu, Chaohe; Yin, Tianxiang; Chen, Zhiyun

doi:10.1016/j.molliq.2015.03.024

Cited by 5 publications

(4 citation statements)

References 21 publications

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“…For this mixture, the electric field increases the critical temperature at atmospheric pressure and thus favors demixing. Apart from an unusual sign in E m+ 1−α , NM-3P displays peculiar properties close to the liquid-liquid critical point like a very large heat capacity anomaly and a very large asymmetry in its mole fraction coexistence-curve diameter in the two-phase region [62][63][64]. Figure 1 shows an illustrative example of two UCSTtype binary mixtures, nitrobenzene-tetradecane [51] and NM-3P [61] showing clear anomalies of different sign.…”

Section: Experimental Evidence Of the Critical Anomaly In The One-phamentioning

confidence: 99%

“…In addition, these are some of the few systems in the literature for which accurate refractive index measurements n(T ) in the twophase region are additionally available. Moreover, n(T ) have been converted to mole fraction x(T ) using a previously determined n(T, x) function in the one-phase region close to the phase boundary [64,77]. We have revisited these systems with a view to provide an updated picture of asymmetric liquid-liquid criticality in ε and n comparing polar-non-polar and polar-polar mixtures.…”

Section: Experimental Evidence Along Coexistence In the Two-phase Regionmentioning

confidence: 99%

“…One can write a simplified power law ε d − ε c = Γ d |t| θ with Γ d and θ the effective critical amplitude and effective exponent, respectively, and obtain a value for θ by means of a linear fit to log(ε d − ε c ) = log Γ d + θ log |t|. Figure 3 shows log-log plots in the ε-T , n-T and x 2 -T planes for nitrobenzenetetradecane and nitromethane-3-pentanol, together with corresponding linear fits by keeping the critical parameters (T c , ε c , n c , and x 2,c ) fixed to literature values [51,61,64]. The subscript 2 is chosen for the component with the larger molecular volume in the mixture, namely, tetradecane and 3-pentanol.…”

Section: Experimental Evidence Along Coexistence In the Two-phase Regionmentioning

confidence: 99%

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Liquid-liquid criticality in the dielectric constant and refractive index: A perspective

Losada-Pérez

2019

Eur. Phys. J. E

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The critical region in the phase diagram of condensed matter systems such as fluids or fluid mixtures is characterized by the anomalous behaviour of specific thermodynamic properties. Here, we discuss the progress of understanding the behaviour of two intimately related properties, the dielectric constant ε and the refractive index n, when approaching the liquid-liquid critical point in binary liquid mixtures. Phenomenological scaling approaches, in particular, complete scaling formulation, are highlighted. In addition, experimental evidence provided by dielectric spectroscopy and optical measurements supporting the asymmetry-related critical features in ε and n in the one-and two-phase regions is assessed. We revisit recent experimental data and point out peculiar patterns of behaviour of polar-polar liquid mixtures as compared to (much more frequently studied) polar-non-polar mixtures. We point the necessity of additional research efforts towards the study of polar-polar mixtures, which would shed light into the influence of (microscopic) system-dependent parameters on asymmetry-related features of liquid-liquid criticality.

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Section: Experimental Evidence Of the Critical Anomaly In The One-phamentioning

confidence: 99%

Section: Experimental Evidence Along Coexistence In the Two-phase Regionmentioning

confidence: 99%

Section: Experimental Evidence Along Coexistence In the Two-phase Regionmentioning

confidence: 99%

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Liquid-liquid criticality in the dielectric constant and refractive index: A perspective

Losada-Pérez

2019

Eur. Phys. J. E

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“… l X-ray data corrected to RT using equation ρ[298 K] = ρ[ T ]/(1 + 1.5 × 10 –4 (298 – T ). m Ref n Ref o Ref …”

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confidence: 99%

3-Methylazasydnone: First Energetic Mesoionic Liquid

Muravyev

Melnikov

Pronkin

et al. 2023

ACS Materials Lett.

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Energetic ionic liquids (EILs) have drawn considerable attention as potential liquid propellant components. However, most known EILs are oxygen-deficient and can be used only with external oxidizer. Herein, we report the first example of energetic mesoionic liquid, 3-methylazasydnone, that can function both as a monopropellant and in bipropellant systems. Methylazasydnone has the highest density among the methylated five-membered aromatic heterocycles in the liquid and solid state (1.49 and 1.60 g cm −3 , respectively), shows moderate volatility, good thermal stability, and is insensitive to impact. The computed performance of liquid propellant's combustion is superior to that of the benchmark energetic ionic liquid, 2hydroxyethylhydrazinium nitrate (428 vs 424 g•s cm −3 ). Overall, methylazasydnone is a promising advanced functional material for application in green liquid mono-and bipropellants.

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