Determination of the vaporisation enthalpies and estimation of the polarity for 1-alkyl-3-methylimidazolium propionate {[Cnmim][Pro](n=2, 3)} ionic liquids

Hong, Mei; Liu, Ru-Jing; Yang, Hua; Guan, Wei; Tong, Jing; Yang, Jia-Zhen

doi:10.1016/j.jct.2013.11.004

Cited by 31 publications

(24 citation statements)

References 34 publications

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“…In Figure , the TG curves are all rigorously linear with correlation coefficients exceeding 0.999. The high linearity indicates that the observed decrease in weight over time at constant temperature resulted from the vaporization of [Si‐E n ‐2959Im‐A][TsO] ( n = 1, 3, 5) and not from the evolution of thermal degradation products or impurities . In Table , [Si‐E n ‐2959Im‐A][TsO] ( n = 1, 3, 5) present very low saturated vapor pressures at high temperatures.…”

Section: Resultsmentioning

confidence: 97%

“…A plot of p versus v follows the same trend for a series of compounds with known vapor pressure, regardless of chemical structure, provided that the sample does not associate in the solid, liquid, or gas phase allowing the calibration constant k to be determined and thus the vapor pressures of unknown materials to be found …”

Section: Methodsmentioning

confidence: 90%

“…The saturated vapor pressures of [Si‐E n ‐2959Im‐A][TsO] ( n = 1, 3, 5) were investigated by isotherm gravimetry method. Although the low vapor pressure of ILs is virtually immeasurable at room temperature, this parameter can be determined by using a thermogravimetric approach . The vaporization phenomenon of ILs under the conventional TGA conditions can be described by the Langmuir equation

- d m /d t = p α {(M / 2 π R T)}^{1 / 2}

where m is the mass of the sample at time t , −d m/ d t is the rate of the mass loss per unit area, p is the pressure, α is the vaporization constant, T is the absolute temperature, R is the universal gas constant, and M is the molar mass of the evaporating vapor.…”

Section: Methodsmentioning

confidence: 99%

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Initiating the Photopolymerization Behaviors of Water‐Soluble Polymerizable Polysiloxane–Polyether Block Imidazolium Ionic Liquids with Antibacterial Capability

Zhang

Jiang

Gao

et al. 2017

Macro Chemistry & Physics

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Three water‐soluble polymerizable polysiloxane–polyether block imidazolium ionic liquids containing α‐hydroxy alkylphenone groups ([Si‐En‐2959Im‐A][TsO] (n = 1, 3, 5) are designed and synthesized as novel green photoinitiators. The photochemical properties and photoinitiation mechanism of the [Si‐En‐2959Im‐A][TsO] are investigated by ultraviolet absorption spectroscopy, real‐time infrared spectroscopy and electron spin resonance. [Si‐En‐2959Im‐A][TsO] exhibit good water solubility that reaches up to 12%. [Si‐En‐2959Im‐A][TsO] not only show desirable thermal properties and low saturated vapor pressure, but also effectively initiate photopolymerization. The initial weight loss of [Si‐En‐2959Im‐A][TsO] (n = 1, 3, 5) is at 256 °C and their saturated vapor pressures are less than 3.0 Pa. The migration of the photolysis fragments of [Si‐En‐2959Im‐A][TsO] from the cured material is mitigated significantly by their polymerizability and high molecular weights. Furthermore, biological tests involving Escherichia coli and Staphylococcus aureus strains in contact with the UV‐cured films initiated by [Si‐En‐2959Im‐A][TsO] demonstrate that [Si‐En‐2959Im‐A][TsO] are effective antibacterial agents. Therefore, [Si‐En‐2959Im‐A][TsO] are promising components for the preparation of environmentally friendly materials and antibacterial coatings.

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Section: Resultsmentioning

confidence: 97%

Section: Methodsmentioning

confidence: 90%

- d m /d t = p α {(M / 2 π R T)}^{1 / 2}

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Initiating the Photopolymerization Behaviors of Water‐Soluble Polymerizable Polysiloxane–Polyether Block Imidazolium Ionic Liquids with Antibacterial Capability

Zhang

Jiang

Gao

et al. 2017

Macro Chemistry & Physics

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“…Notably, the method has some crucial advantages: small amounts of sample, short experimental time, the commercial availability of the experimental setup, and the simplicity of measuring technique. As a result, isothermogravimetrical analysis has attracted more and more attention from scientific communities [14,15,20].…”

mentioning

confidence: 99%

“…Tong et al [15,20] measured the vaporization enthalpy of ILs [C n mim][Pro](n = 2, 3, 4, 5, 6) and put forward a new model on vaporization enthalpy for ILs.…”

mentioning

confidence: 99%

Vaporization enthalpy and the molar surface Gibbs free energy for ionic liquids [C n Dmim][NTF 2 ] ( n = 2, 4)

Wei

Fan

Pan

et al. 2016

The Journal of Chemical Thermodynamics

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Antisolvent with an Ultrawide Processing Window for the One‐Step Fabrication of Efficient and Large‐Area Perovskite Solar Cells

et al. 2018

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Among the above methods, the most common strategy is the one-step spincoating deposition assisted by an antisolvent, which is an easy and efficient approach to obtain dense and highly crystalline perovskite thin film. Three organic solvents-chlorobenzene (CB), [4b] methylbenzene (toluene), [4a] and diethyl ether (ether) [4c] -are the favorite antisolvents for this method. Efficient PSCs with PCE over 20% have been frequently obtained by using these antisolvents, [6] through the one-step spin-coating method.Three dominant parameters related to the one-step spin-coating process are: 1) the ratio between dimethylformamide (DMF):dimethyl sulfoxide (DMSO) in the perovskite precursor solution, 2) the antisolvent dripping time during the spin procedure, and 3) the antisolvent volume used for each coating process as depicted in Figure 1a. However, the current antisolvents mentioned above usually have very narrow and various operating windows. For instance, from the point of view of DMF/DMSO ratio, the proper value for CB is 4:1, [7] toluene is 7:3, [4a] while ether is 9:1. [4c] Meanwhile, the dripped antisolvent volume for each antisolvent is also different from case to case: 0.1 mL for CB, 0.5-1.0 mL for toluene, and 0.5 mL for ether. [4a,c,6a,7] This actuality means that only skillful experimenters can handle the spin-coating tricks and thus fabricate PCEs with high efficiency, which limits the development of the PSCs.Herein, we would like to introduce anisole as an antisolvent, with ultrawide processing window for the one-step fabrication of efficient and large-area PSCs. Using the anisole as antisolvent, there is no need to make any significant effort to obtain optimized conditions for the fabrication of high-quality perovskite films (Figure 1b). By dripping anisole on the spinning perovskite precursor film, it is possible to make dense and crystalline perovskite films as shown in Figure 1c,d. The thickness of the perovskite capping layer is about 450 nm, which is comparable with the perovskite thin films using the other antisolvents with optimized condition. [7,8] Also, the PCEs of PSCs fabricated using anisole are not sensitive to the precursor solution composition and antisolvent dripping parameters. We prepared perovskite thin films Photovoltaic technologies based on perovskite absorber materials have led this optoelectronic field into a brand-new horizon. However, the present antisolvents used in the one-step spin-coating method always encounter problems with the very narrow process window. Herein, anisole is introduced into the one-step spin-coating method, and the technology is developed to fabricate perovskite thin films with ultrawide processing window with a dimethylformamide (DMF):dimethyl sulfoxide (DMSO) ratio varying from 6:4 to 9:1 in the precursor solution, anisole dripping time ranging from 5 to 25 s, and an antisolvent volume varying from 0.1 to 0.9 mL. Perovskite thin films as large as 100 cm 2 are successfully fabricated using this method. Maximum photoelectric conversion efficiencies of 1...

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Determination of the vaporisation enthalpies and estimation of the polarity for 1-alkyl-3-methylimidazolium propionate {[Cnmim][Pro](n=2, 3)} ionic liquids

Cited by 31 publications

References 34 publications

Initiating the Photopolymerization Behaviors of Water‐Soluble Polymerizable Polysiloxane–Polyether Block Imidazolium Ionic Liquids with Antibacterial Capability

Initiating the Photopolymerization Behaviors of Water‐Soluble Polymerizable Polysiloxane–Polyether Block Imidazolium Ionic Liquids with Antibacterial Capability

Vaporization enthalpy and the molar surface Gibbs free energy for ionic liquids [C n Dmim][NTF 2 ] ( n = 2, 4)

Antisolvent with an Ultrawide Processing Window for the One‐Step Fabrication of Efficient and Large‐Area Perovskite Solar Cells

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