Bibliographies thématiques / Ionic Liquids and Crown Ethers

Littérature scientifique sur le sujet « Ionic Liquids and Crown Ethers »

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Publié le 18 mai 2024

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Articles de revues sur le sujet "Ionic Liquids and Crown Ethers"

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Tian, Ju, Qi Tang, Yongshen Zhang, Yuzhen Shu, Lihua Zhang et Weiming Zheng. « A study on the viscosity, density, and derivative properties of 1-alkyl-3-methylimidazolium bis((trifluoromethyl)sulfonyl)imides with benzo-15-crown-5 binary mixtures ». Journal of Chemical Research 47, no 1 (janvier 2023) : 174751982311563. http://dx.doi.org/10.1177/17475198231156358.

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The essential factors that affect the interfacial mass transfer rate of crown ether–ionic liquid systems are studied by examining the physicochemical properties of mixtures of ionic liquids with benzo-15-crown-5. In the present work, the 1-alkyl-3-methylimidazolium bis((trifluoromethyl)sulfonyl)imides ionic liquids ([C2MIm][NTf2], [C3MIm][NTf2], [C4MIm][NTf2], and [C5MIm][NTf2]) are adopted as the solvent and benzo-15-crown-5 is used as the solute. A series of binary mixtures of the ionic liquid and benzo-15-crown-5, with different molar fractions of ionic liquids, is formulated by the weight method. The viscosity and density are determined for four binary mixtures of ionic liquid and benzo-15-crown-5 at atmospheric pressure in a temperature range of 298.15 to 343.15 K. The values obtained for viscosity and density are fitted with empirical equations, and the energy barrier, a-constant, and the isobaric thermal expansion coefficient are all calculated. Interactions between the ionic liquid and the solute benzo-15-crown-5 are analyzed, and the above properties are discussed by comparison with systems in which different solutes are present in the same ionic liquid. It is found that interactions between the ionic liquid and benzo-15-crown-5 in the mixtures are more intense than in mixed systems composed of ionic liquids and other solutes.
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Shkrob, Ilya A., Timothy W. Marin et Mark L. Dietz. « On the Radiation Stability of Crown Ethers in Ionic Liquids ». Journal of Physical Chemistry B 115, no 14 (14 avril 2011) : 3903–11. http://dx.doi.org/10.1021/jp200307h.

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Yao, Hervé, et Katharina M. Fromm. « Ionic liquids based on crown ethers as electrolytes for batteries ». Acta Crystallographica Section A Foundations and Advances 72, a1 (28 août 2016) : s290—s291. http://dx.doi.org/10.1107/s2053273316095632.

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Oba, Yukiko, Megumi Okuhata, Toshiyuki Osakai et Tomoyuki Mochida. « Solvate and protic ionic liquids from aza-crown ethers : synthesis, thermal properties, and LCST behavior ». Physical Chemistry Chemical Physics 20, no 5 (2018) : 3118–27. http://dx.doi.org/10.1039/c7cp02807e.

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Ueno, Kazuhide, Ryoichi Tatara, Seiji Tsuzuki, Soshi Saito, Hiroyuki Doi, Kazuki Yoshida, Toshihiko Mandai et al. « Li+ solvation in glyme–Li salt solvate ionic liquids ». Physical Chemistry Chemical Physics 17, no 12 (2015) : 8248–57. http://dx.doi.org/10.1039/c4cp05943c.

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Raman spectra and electrode potentials corroborated that glyme–Li salt solvate ionic liquids consist of crown-ether like complex cations and counter anions with a few uncoordinated glyme molecules in the liquid state.
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Atanassova, M. « Crown ethers as synergistic agents in the solvent extraction of trivalent lanthanides with 8-hydroxyquinoline ». Journal of the Serbian Chemical Society 73, no 1 (2008) : 29–39. http://dx.doi.org/10.2298/jsc0801029a.

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The liquid extraction of the 13 lanthanides with mixtures of 8-hydro?xyquinoline (HQ) and crown ethers (S) dibenzo-18-crown-6 (DB18C6) and di?benzo-24-crown-8 (DB24C8) in 1,2-dichloroethane as a diluent from chloride medium at constant ionic strength ? = 0.1 was investigated. The composition of the extracted species was established as LnQ3 with HQ alone and as LnQ3?S in the presence of a crown ether. The values of the equilibrium constants were calculated. The addition of DB18C6 to the metal chelate system improved the extraction efficiency, while a weak synergistic enhancement was found when the metals were extracted with mixtures of HQ-DB24C8. The parameters of the extraction process were determined and the separation factors between two adjacent lanthanides(III) were calculated.
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Wang, Yun, Zhengnan Tian, Pengfei Sun, Jie Zhao, Hao Sun, Lijun Gao et Guifu Zou. « A multi-iodine doped strategy for ionic conductivity enhancement of crown ether functionalized ionic liquids ». RSC Advances 5, no 129 (2015) : 107185–91. http://dx.doi.org/10.1039/c5ra23229e.

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Barman, Siti, et Mahendra Nath Roy. « Hollow circular compound-based inclusion complexes of an ionic liquid ». RSC Advances 6, no 80 (2016) : 76381–89. http://dx.doi.org/10.1039/c6ra14138b.

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Inclusion complex formation between hollow circular compounds, e.g. crown ethers, and an ionic liquid, 1-methyl-3-octylimidazolium tetrafluoroborate, in acetonitrile solvent is studied by means of conductivity measurements, IR and NMR spectra.
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Cheng, Chen, et Huanwang Jing. « Brønsted acidic ionic liquids of aza-crown ether complex cations : preparation and applications in organic reactions ». RSC Adv. 4, no 65 (2014) : 34325–31. http://dx.doi.org/10.1039/c4ra03061c.

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Marin, Timothy W., Ilya A. Shkrob et Mark L. Dietz. « Hydrogen-Bonding Interactions and Protic Equilibria in Room-Temperature Ionic Liquids Containing Crown Ethers ». Journal of Physical Chemistry B 115, no 14 (14 avril 2011) : 3912–18. http://dx.doi.org/10.1021/jp201193f.

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Thèses sur le sujet "Ionic Liquids and Crown Ethers"

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Saha, Subhadeep. « Study to explore the formation of host - guest inclusion complexes of cyclodextrins with biologically active moleculars and crown ethers with ionic liquids by spectroscopic and physicochemical techniques ». Thesis, University of North Bengal, 2018. http://ir.nbu.ac.in/handle/123456789/2648.

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Petru, Niga. « Self Assembly at the Liquid Air Interface ». Doctoral thesis, KTH, Yt- och korrosionsvetenskap, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-12865.

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The aim of this work is to study the interfacial properties of amphiphilic compounds at the liquid–air interface in an attempt to develop a comprehensive understanding of their orientation as well as the influence of their interaction with the solvent on the interfacial layer properties. Using Vibrational Sum Frequency Spectroscopy (VSFS) as the main tool, the molecular structure of the amphiphilic layer and the amphiphile–solvent relation can be illuminated in great detail – it is arguably the most sensitive surface spectroscopy currently available. Due to its second order nature, the VSFS technique is capable of distinguishing molecules at the interface even in the presence of a vast excess of similar molecules in the bulk.Ionic liquids (Ils) form a class of solvent which are increasingly receiving attention as ``green solvents´´. Some of these, such as ethyl ammonium nitrate (EAN), a protic IL, have the capacity to hydrogen bond extensively which is one of the important features they share with water. Since the interaction with solvent is an important consideration for self assembly and it is known that surfactant self assembly in the EAN bulk is analogous to in water, it was considered of interest to probe self assembly at EAN–air interface. To this end the interfacial structure of the pure EAN interface was probed, as was the conformation and ordering of nonionic surfactants. These studies reveal that EAN is highly ordered at the interface, exposing the ethyl moiety to the gas phase. Additionally, polarization studies have enabled the average orientation of the ethyl group to be determined. Adsorption of nonionic surfactants at the interface appears to significantly displace the EAN from the interface. The headgroup of the surfactant, a linear ethylene oxide group, appears to be highly disordered.The disorder of the linear ethylene oxide groups has led to difficulties in their surface spectroscopic fingerprinting in this and other works. In an attempt to study the interfacial behaviour of ethylene oxide and the temperature dependence of its hydration, closed loop structures of PEO attached to hydrophobic groups were also probed. This essentially locks their conformation. Such molecules are known as crown ethers and display interesting interfacial behaviour and also the ability to bind cations. The presence of even small amounts of adsorbed crown ethers at the water interface is shown to considerably perturb the water structure. The NO, CN, COC and CH vibrational modes of these compounds at the air-water interface as well as OH vibrational modes of the surface water hydrating this compound have been targeted in order to obtain molecular information about arrangement and conformation. The CH2 vibrational modes of crown ethers have been identified and found to be split due to their interaction with ether oxygen. The spectra provide evidence for the existence of a protonated crown complex moiety at the surface leading to the appearance of strongly ordered water species. The orientation of Nitrobenzo crown (NB15C5) was monitored as a function of solution concentration, by targeting the ratio of peak intensities of the CN and NO2 vibrational modes. The water of hydration has also been probed as a function of crown concentration, salt concentration, and temperature. The latter study strongly suggests that the surface can be treated as a charged interface, and that the associated ordered water decreases with increasing ionic strength of the bulkFinally, insoluble monolayers of fatty acids spread on a water surface have also been studied in an effort to further understand the relationship between molecular architecture and film structure. Fatty acid (Arachidic Acid – AA and Eicosenoic Acid – EA) monolayers are compared to investigate the effect on the monolayer structure of introducing unsaturation into the alkyl chain. For AA, at very large area per molecule, floating domains of crystalline nature exist rather than any classical gaseous phase. The measured conformational disorder in EA decreases continuously with monolayer compression and no crystalline domains are observed at low density. Addition of NaCl to the subphase does not affect the monolayer order for either of the compounds; instead, a dramatic increase in the signal of the water hydrating the headgroups is observed. The effect of introducing further unsaturations (up to three) was also studied in order to probe the resulting interfacial structure. Remarkably the double bonds appear to adopt the same orientation, irrespective of how many they are in the chain. By monitoring the vinyl CH stretch it was possible to study the film stability towards oxidative degradation and it was found that all three unsaturated species studied showed rapid degradation. The rate of degradation could be controlled by adjusting the film pressure. However, the monolayers could be stabilised by performing the experiments in an inert nitrogen atmosphere.
QC20100629
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Guarda, Emerson Adriano. « Utilização de líquidos iônicos na síntese de enonas e de enaminonas ». Universidade Federal de Santa Maria, 2009. http://repositorio.ufsm.br/handle/1/4172.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
The use of ionic liquids 1-butyl-3-methylimidazolium tetrafluorborate ([BMIM] [BF4]) and 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF6]) as catalytic solvent in the synthesis of 1,1,1-trichloro(fluoro)-3-alken-2-onas [CX3C(O)C(R2)=C(R1)OR] from the reaction of enolethers or acetals with acyl halides is reported. The results obtained in the presence of ionic liquids were compared with those obtained in the conventional condition already developed in our laboratory, and they demonstrated great improvement in the reaction times, with maintenance of the good yields. Ionic liquids also were used in the reactions of enolethers with poor reactive acylants, as acetyl chloride and benzoyl chloride, proving its efficiency as catalytic media in this reaction type. The ionic liquids were still used as medium in the synthesis of β-enaminones bearing a trifluoro[chloro]methyl starting from the 1,1,1-trichloro(fluoro)-3-alken-2-ones. It was also evaluated the reutilization of the ionic liquids (recharge) after the reactions mentioned above. In all of the cases of recharge there was the maintenance of the times reacionais without significant loss of yield.
Esta tese descreve a utilização dos líquidos iônicos tetrafluorborato de 1-butil-3-metilimidazolium ([BMIM] [BF4]) e hexafluorfosfato de 1-butil-3-metilimidazolium ([BMIM][PF6]) como solventes catalíticos na síntese de 1,1,1-tricloro(fluor)-3-alquen-2-onas [CX3C(O)C(R2)=C(R1)OR] a partir da reação de enoléteres ou acetais com haletos de acila. Os resultados obtidos com líquidos iônicos foram comparados com os obtidos por método convencional já desenvolvido em nosso laboratório, e demonstraram grande melhora nos tempos reacionais e manutenção dos bons rendimentos. Os líquidos iônicos também foram utilizados em reações de enoléteres com acilantes menos reativos como cloreto de acetila e cloreto de benzoíla, provando ser bons meios catalíticos neste tipo de reação. Os líquidos iônicos foram utilizados como meio para a síntese de trifluoro[cloro]metil β-enaminonas a partir de 1,1,1-tricloro(fluor)-3-alquen-2-onas. Também foi avaliada a reutilização dos líquidos iônicos (recarga) após as reações mencionadas. Em todos os casos, após a recarga os tempos reacionais foram mantidos sem perda significativa nos rendimentos.
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Lin, Yih-Tyng, et 林奕廷. « A. Aza-crown ether functionalized silicon quantum dots as metal ion sensors B. Functionalized MoS2 quantum dots as metal ion sensors C. Theoretical study of Bn clusters in ionic liquids ». Thesis, 2018. http://ndltd.ncl.edu.tw/handle/7kr4mb.

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碩士
國立東華大學
化學系
107
A. Aza-crown ether functionalized silicon quantum dots as metal ion sensors The B3LYP/LanL2DZ method was employed to calculate the binding energy between metal ions and aza-crown ether (C12H23O5N, C14H27O6N, and C14H28O5N2). The magnitudes of binding energies are found to correlate with the capability of aza-crown ether functionalized silicon quantum dots used as metal ion (K+, Na+, Mg2+,Ca2+, Sr2+, Ba2+, Mn2+) sensors. B. Functionalized MoS2 quantum dots as metal ion sensors B3LYP with LanL2DZ and QZVP were used to study the capability of three functionalized (-COOH, -NH2, and -SH) MoS2 quantum dots to detect Co2+, Cd2+and Pb2+ ion. The binding energy between the ions and MoS2 clusters was investigated to assess the sensing mechanism. C. Theoretical study of Bn clusters in ionic liquids The interactions between Boron clusters (Bn, n=6) and ionic liquid were investigated using the B3LYP/cc-pVTZ level of calculations. The likely structures and their IR and Raman spectra are obtained.
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LEONG, YUN-YI, et 梁婉怡. « Study of Crown Ether Based Polymer for the Application of Enantioselective Sensors and Interaction with Ionic-liquid ». Thesis, 2017. http://ndltd.ncl.edu.tw/handle/53711782223986957507.

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Chapitres de livres sur le sujet "Ionic Liquids and Crown Ethers"

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Bartsch, Richard A., Sangki Chun et Sergei V. Dzyuba. « Ionic Liquids as Novel Diluents for Solvent Extraction of Metal Salts by Crown Ethers ». Dans ACS Symposium Series, 58–68. Washington, DC : American Chemical Society, 2002. http://dx.doi.org/10.1021/bk-2002-0818.ch005.

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Mohan, Ram S., et Peter W. Anzalone. « Synthesis of Homoallyl Ethers via Allylation of Acetals and Aldehydes in Ionic Liquids ». Dans ACS Symposium Series, 104–15. Washington, DC : American Chemical Society, 2007. http://dx.doi.org/10.1021/bk-2007-0950.ch009.

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Gupta, Radhika, Yukti Monga, Ashu Gupta et Rakesh Kumar Sharma. « Chapter 3. Supported ionic liquids for advanced catalytic applications ». Dans Ionic Liquids, Deep Eutectic Solvents, Crown Ethers, Fluorinated Solvents, Glycols and Glycerol, 65–86. De Gruyter, 2023. http://dx.doi.org/10.1515/9783110788129-003.

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Ahammed, Sabir, et Brindaban C. Ranu. « Chapter 1. Synthesis of bio-active heterocycles using ionic liquids ». Dans Ionic Liquids, Deep Eutectic Solvents, Crown Ethers, Fluorinated Solvents, Glycols and Glycerol, 1–24. De Gruyter, 2023. http://dx.doi.org/10.1515/9783110788129-001.

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Wahan, Simranpreet K., Gaurav Bhargava et Pooja A. Chawla. « Chapter 6 Role of crown ethers as mediator in various chemical reactions ». Dans Ionic Liquids, Deep Eutectic Solvents, Crown Ethers, Fluorinated Solvents, Glycols and Glycerol, 145–62. De Gruyter, 2023. http://dx.doi.org/10.1515/9783110788129-006.

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Rao, Vaidya Jayathirtha. « Chapter 2. Synthesis of oxygen and sulfur heterocycles mediated by ionic liquids ». Dans Ionic Liquids, Deep Eutectic Solvents, Crown Ethers, Fluorinated Solvents, Glycols and Glycerol, 25–64. De Gruyter, 2023. http://dx.doi.org/10.1515/9783110788129-002.

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Singh, Avtar, Nirmaljeet Kaur, Rohini, Anupama Parmar, Payal Malik et Harish Kumar Chopra. « Chapter 4 Recent updates on chiral ionic liquid–mediated asymmetric organic synthesis ». Dans Ionic Liquids, Deep Eutectic Solvents, Crown Ethers, Fluorinated Solvents, Glycols and Glycerol, 87–106. De Gruyter, 2023. http://dx.doi.org/10.1515/9783110788129-004.

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« List of contributors ». Dans Ionic Liquids, Deep Eutectic Solvents, Crown Ethers, Fluorinated Solvents, Glycols and Glycerol, XIII—XVI. De Gruyter, 2023. http://dx.doi.org/10.1515/9783110788129-205.

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« A brief professional profile of Prof. Anil Kumar Singh ». Dans Ionic Liquids, Deep Eutectic Solvents, Crown Ethers, Fluorinated Solvents, Glycols and Glycerol, IX—X. De Gruyter, 2023. http://dx.doi.org/10.1515/9783110788129-203.

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« Frontmatter ». Dans Ionic Liquids, Deep Eutectic Solvents, Crown Ethers, Fluorinated Solvents, Glycols and Glycerol, I—IV. De Gruyter, 2023. http://dx.doi.org/10.1515/9783110788129-fm.

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