scholarly journals Determination of the dispersion forces in the gas phase structures of ionic liquids using exclusively thermodynamic methods

2021 ◽  
Author(s):  
Dzmitry H Zaitsau ◽  
Ralf Ludwig ◽  
Sergey P. Verevkin
Keyword(s):  
Hydrogen Bonding ◽  
Ionic Liquids ◽  
Thermodynamic Properties ◽  
Gas Phase ◽  
Coulomb Interaction ◽  
Dispersion Forces ◽  
Delicate Balance ◽  
Phase Structures ◽  
Different Types

Ionic liquids are described by a delicate balance of Coulomb interaction, hydrogen bonding and dispersion forces. Dissecting the different types of interaction from thermodynamic properties is still a challenge. Here,...

Dissecting the Vaporization Enthalpies of Ionic Liquids by Exclusively Experimental Methods: Coulomb Interaction, Hydrogen Bonding, and Dispersion Forces

2019 ◽  
Vol 58 (25) ◽  
pp. 8589-8592 ◽  
Author(s):  
Dzmitry H. Zaitsau ◽  
Vladimir N. Emel'yanenko ◽  
Peter Stange ◽  
Sergey P. Verevkin ◽  
Ralf Ludwig
Keyword(s):  
Hydrogen Bonding ◽  
Ionic Liquids ◽  
Coulomb Interaction ◽  
Experimental Methods ◽  
Dispersion Forces

Spectroscopic investigations of hydrogen bonding interactions in the gas phase. II. The determination of the geometry and potential constants of the hydrogen-bonded heterodimer CH 3 CN • • • HF from its microwave rotational spectrum

1980 ◽  
Vol 370 (1741) ◽  
pp. 239-255 ◽  
Keyword(s):  
Hydrogen Bonding ◽  
Gas Phase ◽  
Spectroscopic Constants ◽  
Rotational Spectrum ◽  
Hydrogen Bonding Interactions ◽  
Isotopic Species ◽  
Microwave Rotational Spectrum ◽  
Vibration Rotation ◽  
Hydrogen Bonded

The microwave rotational spectrum of the hydrogen-bonded heterodimer CH 3 CN • • • HF has been identified and shown to be characteristic of a symmetric top. A detailed analysis of several rotational transitions for a variety of isotopic species gives the spectroscopic constants summarized in the following table: Rotational constants/MHz, vibration-rotation constants/MHz and vibrational separations/cm -1 of CH 3 CN • • • HF

The Group I Alkali Metals in Ionic Liquids: Electrodeposition and Determination of Their Kinetic and Thermodynamic Properties

2019 ◽  
Vol 33 (7) ◽  
pp. 523-535 ◽  
Author(s):  
Rahmat Wibowo ◽  
Leigh Aldous ◽  
Sarah E. Ward Jones ◽  
Richard G. Compton
Keyword(s):  
Ionic Liquids ◽  
Thermodynamic Properties ◽  
Alkali Metals ◽  
Group I

scholarly journals Acidic Gases Solubility in Bis(2-Ethylhexyl) Sulfosuccinate Based Ionic Liquids Using the Predictive Thermodynamic Model

Membranes ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 429
Author(s):  
Amal Mechergui ◽  
Alsu I. Akhmetshina ◽  
Olga V. Kazarina ◽  
Maria E. Atlaskina ◽  
Anton N. Petukhov ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Ionic Liquids ◽  
Thermodynamic Properties ◽  
Present Article ◽  
Free Volume ◽  
Molecular Interactions ◽  
Thermodynamic Model ◽  
Acidic Gases ◽  
Screening Model ◽  
Hydrogen Bonding Interactions

To properly design ionic liquids (ILs) adopted for gases separation uses, a knowledge of ILs thermodynamic properties as well their solubilities with the gases is essential. In the present article, solubilities of CO2 and H2S in bis(2-Ethylhexyl)sulfosuccinate based ILs were predicted using the conductor like screening model for real solvents COSMO-RS. According to COSMO-RS calculations, the influence of the cation change was extensively analyzed. The obtained data are used for the prediction of adequate solvent candidates. Moreover, to understand the intrinsic behavior of gases solubility the free volume of the chosen ILs and their molecular interactions with respectively CO2 and H2S were computed. The results suggest that hydrogen bonding interactions in ILs and between ILs and the gases have a pivotal influence on the solubility.

The Spectrophotometric Determination of Formaldehyde in Whole Smoke/Eine spektralphotometrische Methode zur Bestimmung von Formaldehyd im Vollrauch von Cigaretten

1971 ◽  
Vol 6 (1) ◽  
Author(s):  
H.P. Stauffer ◽  
J. Bourquin
Keyword(s):  
Gas Phase ◽  
Cigarette Smoke ◽  
Carbonyl Compounds ◽  
Ammonium Ion ◽  
Buffer Solution ◽  
Simple Method ◽  
Different Types ◽  
Volatile Aldehydes ◽  
Whole Smoke

AbstractThe quantitative determination of formaldehyde in the gas phase of cigarette smoke does not permit any conclusion about the actual level in whole smoke. This is due to the fact that a Cambridge filter charged with smoke condensate absorbs up to 50 % of the volatile aldehydes from the gas phase. A simple method is presented making possible the estimation of formaldehyde in whole cigarette smoke. The procedure is based on the Hantzsch reaction between formaldehyde, acetylacetone and ammonium ion in an aqueous buffer solution. The reaction product, 3,5-diacetyl1,4-dihydrolutidine, has an absorption maximum at 412 nm and is measured spectrophotometrically. The operations are simple and there are no separation steps required. Reproducibility is excellent and interference by other carbonyl compounds can be neglected. Acetaldehyde in concentrations 10 times higher than formaldehyde interferes to less than 1 %. Different types of cigarettes have been analysed with respect to their delivery of formaldehyde. Values found range from 40 to 90 µg per cigarette. The concentrations found in whole smoke are significantly higher than the values cited in the Iiterature for gas phase formaldehyde

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