Thermodynamic properties of tetrahydrofuran from 8 to 322 K

Lebedev, B. V.; Rabinovich, I.B.; Milov, V.I; Lityagov, V.Ya

doi:10.1016/0021-9614(78)90064-2

Cited by 29 publications

(12 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The isobaric heat capacities for pure components were obtained from the literature, − while the molar volumes and the thermal expansion coefficients were estimated by their definitions in eqs and , respectively. …”

Section: Resultsmentioning

confidence: 99%

Experimental Measurements of Volumetric and Acoustic Properties of Binary Mixtures of 1-Butyl-3-methylimidazolium Hexafluorophosphate with Molecular Solvents

2020

View full text Add to dashboard Cite

In this study, measurements regarding the density and speed of sound for binary liquid mixtures of the 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF6]) ionic liquid (+ methanol, or + acetonitrile, or + tetrahydrofuran, or + formamide, or + N,N-dimethylformamide, or + dimethylsulfoxide) were carried out as a function of the composition at temperatures between 288.15 and 313.15 K and atmospheric pressure. Experimental results allowed us to calculate the excess molar volume, , and excess isentropic compressibility, , which were fit to a Myers–Scott-type polynomial. The results for the studied systems suggest that structural effects and chemical interactions must predominate over other possible effects, except for the system containing formamide in which physical effects may also be more important.

show abstract

Section: Resultsmentioning

confidence: 99%

Experimental Measurements of Volumetric and Acoustic Properties of Binary Mixtures of 1-Butyl-3-methylimidazolium Hexafluorophosphate with Molecular Solvents

2020

View full text Add to dashboard Cite

show abstract

“…Temperature Dependence of the Aggregate Emission. For a detailed spectroscopic investigation of the P3HT electronic structure in the aggregated phase, we measured absorption as well as emission spectra in THF solution within the temperature range from 300 K down to the melting point of THF (Figure 1), which is at about 160 K. 36 As discussed in detail in previous work, 35 P3HT undergoes a disorder−order transition upon cooling. In the spectra shown in Figure 1, three regimes can be discerned.…”

Section: Resultsmentioning

confidence: 99%

“…Additional emission spectra were also measured for the temperature range between 160 and 5 K (Figure 3c). Since below 160 K THF is in a crystalline phase, 36 the spectra correspond to P3HT chains embedded in a rigid THF matrix. This preludes major conformal changes.…”

Section: Resultsmentioning

confidence: 99%

Spectroscopic Signature of Two Distinct H-Aggregate Species in Poly(3-hexylthiophene)

et al. 2015

View full text Add to dashboard Cite

In an endeavor to correlate the optoelectronic properties of π-conjugated polymers with their structural properties, we investigated the aggregation of P3HT in THF solution within a temperature range from 300 to 5 K. By detailed steady-state, site-selective, and time-resolved fluorescence spectroscopy combined with Franck–Condon analyses, we show that below a certain transition temperature (265 K) aggregates are formed that prevail in different polymorphs. At 5 K, we can spectroscopically identify two H-type aggregates with planar polymer backbones yet different degree of order regarding their side chains. Upon heating, the H-character of the aggregates becomes gradually eroded, until just below the transition temperature the prevailing “aggregate” structure is that of still phase-separated, yet disordered main and side chains. These conclusions are derived by analyzing the vibrational structure of the spectra and from comparing the solution spectra with those obtained from thin films that were cooled slowly from the melting temperature to room temperature and that had been analyzed previously by various X-ray techniques. In addition, site selectively recorded fluorescence spectra show that there isdependent on temperatureenergy transfer from higher energy to lower energy aggregates. This suggests that they must form clusters with dimensions of the exciton diffusion length, i.e., several nanometers in diameter.

show abstract

“…45,50,51 For the calculation of the activity coefficients, the binary parameters in the NRTL equation ͓Eq. ͑21͔͒ 0.00 9.3701ϫ 10 −9 −1.4530ϫ 10 −9 9.2846ϫ 10 −9…”

Section: Resultsmentioning

confidence: 99%

Gas content of binary clathrate hydrates with promoters

Papadimitriou

Tsimpanogiannis

Stubos

2009

The Journal of Chemical Physics

View full text Add to dashboard Cite

We develop a methodology to calculate the gas storage capacity of binary hydrates stabilized by promoters. This model utilizes equilibrium experimental data of both hydrates (i.e., the hydrate of pure promoter and the binary hydrate of gas and promoter) in order to calculate the gas occupancy in the small cavities that are not occupied by the promoter. The new approach, although based on the traditional van der Waals-Platteeuw theory, has two significant advantages. The hypothetical state of an empty hydrate for the calculation of the chemical potential of water is replaced by the hydrate of the pure promoter whose properties can be determined through simple thermodynamic calculations. In addition, the computational difficulties related to the complete occupancy of the large cavities by the promoter are removed. The proposed methodology is applied to calculate the gas storage capacity of hydrates of two energy-carrier gases (methane and hydrogen) stabilized by tetrahydrofuran. Excellent agreement is observed between the proposed-model predictions and published experimental values for the gas content of hydrates.

show abstract

Thermodynamic properties of tetrahydrofuran from 8 to 322 K

Cited by 29 publications

References 10 publications

Experimental Measurements of Volumetric and Acoustic Properties of Binary Mixtures of 1-Butyl-3-methylimidazolium Hexafluorophosphate with Molecular Solvents

Experimental Measurements of Volumetric and Acoustic Properties of Binary Mixtures of 1-Butyl-3-methylimidazolium Hexafluorophosphate with Molecular Solvents

Spectroscopic Signature of Two Distinct H-Aggregate Species in Poly(3-hexylthiophene)

Gas content of binary clathrate hydrates with promoters

Contact Info

Product

Resources

About