Temat: ionic liquids - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Aminokwasowe ciecze jonowe
Amino acid ionic liquids
Autorzy:: Samaszko-Fiertek, Justyna
Sowińska, Kamila
Dmochowska, Barbara
Ślusarz, Rafał
Madaj, Janusz
Tematy:: ciecze jonowe
cholinowe ciecze jonowe
aminokwasowe ciecze jonowe
ionic liquids
choline ionic liquids
amino acid ionic liquids; Pokaż więcej
Wydawca:: Polskie Towarzystwo Chemiczne
Powiązania:: https://bibliotekanauki.pl/articles/972296.pdf Link otwiera się w nowym oknie
Opis:: Ionic liquids (IL) are defined as compounds consisting only of ions with a melting point below 100°C. [1,2,4]. The first obtained ionic liquid was ethylammonium nitrate synthesized in 1914 by Paul Walden as a result of the protonation of ethylamine with nitric acid [4]. New group of IL are amino acid ionic liquids. They are non-toxic and bio- renewable ionic liquids of natural origin. The amino acids contain at least two functional groups, an amino group and a carboxyl group, which makes them both cationic and anionic in the amino acid ionic liquid. Amino acid ionic liquids attract more and more attention in the field of catalysis, as solvents in chemical transformations and cellulose solvents due to low production costs and their biodegradable. Compounds based on imidazolium, phosphonium, ammonium and choline ionic liquids found a wide application in biological sciences, modern chemistry and materials science [10]. One of their biggest advantages is the ability to absorb CO₂ (especially their amino acid derivatives), which increases the chance of eliminating carbon dioxide from the environment. Amino acid ionic liquids have also found application in the field of catalysis.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: The influence of selected ionic liquids on activity of chitin deacetylase
Autorzy:: Aspras, I.
Kamińska, M.
Karzyński, K.
Kawka, M.
Jaworska, M. M.
Tematy:: chitin deacetylase
enzyme activity
imidasolium ionic liquids
pyridinium ionic liquids
aktywność enzymu
ciecze jonowe; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Powiązania:: https://bibliotekanauki.pl/articles/185154.pdf Link otwiera się w nowym oknie
Opis:: Chitin deacetylase is the only known enzyme which is able to deacetylate N-acetyl-D-glucosamine units in chitin or chitosan chains. As chitin can hardly be dissolved in organic/inorganic solvents, new solvents are still searched. Ionic liquids are promising for that application and for homophase enzymatic deacetylation. The aim of the work was to investigate the influence of selected ionic liquids on activity of chitin deacetylase. It has been shown that [Amim] ionic liquids increase the activity of chitin deacetylase. The highest activity was observed for [Amim][Cl]. Ionic liquids with shorter (ethyl (C2)) and longer side chain (buthyl (C4)) only insignificantly influenced the activity of the enzyme. All tested ionic liquids with [Br] anion increased the activity of chitin deacetylase while the [Emim] and [Bmim] cation in combination with [Cl] anion inhibited the activity of the enzyme.
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Influence of Ionic Liquids on growth of Escherichia coli strain possessing β-galactosidase activity
Autorzy:: Stobińska, M.
Urbański, D.
Bartkowiak, A.
Tematy:: ionic liquids
β-galactosidase
toxicity; Pokaż więcej
Wydawca:: Fundacja na Rzecz Młodych Naukowców
Powiązania:: https://bibliotekanauki.pl/articles/115739.pdf Link otwiera się w nowym oknie
Opis:: Ionic liquids (ILs) have gained a significant attention as alternative solvents in many chemical and biological reactions. ILs have evolved as a new type of non-aqueous solvents for biocatalysis, because they can stabilize and activate enzymes. Ionic liquids to be considered as so called “green solvents” should possess only very low or no toxicity to living organism and the environment. Currently, very little is known about the biotoxicity of ionic liquids. Within this paper a relative toxicity of two ionic liquids 1,3 dimethylimidazolium methyl sulfate [MMIM][MeSO4] and 1-hexyl-3-methylimidazolium chloride [HMIM][Cl]) on the growth of Escherichia coli (E.coli) was evaluated. In this study we focused on ionic liquids, which potentially could increase activity of β-galactosidase produced by selected strain of E. coli. The inhibition of cell growth in the presence of various ionic liquids was determined using both, solid and liquid cultures. Liquid culture was incubated in culture medium with different concentrations of ionic liquids (0.1, 1, 5, 10% (v/v)). Determination of the minimal inhibitory concentration (MIC50) of ionic liquids was based on monitoring of E. coli growth by optical density measured at 600 nm using densitometer. In the second method the solid culture plate with addition of various amount of ILs has been used. The number of colonies formed on the solid culture plate was converted to colony forming units (CFUs). The obtained results have confirmed, that prescreening based on cytotoxicity tests is a key element in selection procedure of ILs for any biotechnological processes based on application of microorganisms.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Capillary Ionization and Jumps of Capacitive Energy Stored in Mesopores
Autorzy:: Kondrat, Svyatoslav
Lomba, Enrique
Cruz, Carolina
Ciach, Alina
Wydawca:: American Chemical Society
Cytata wydawnicza:: Cruz, Carolina, Svyatoslav Kondrat, Enrique Lomba, and Alina Ciach. "Capillary ionization and jumps of capacitive energy stored in mesopores." The Journal of Physical Chemistry C 125, no. 19 (2021): 10243-10249. https://doi.org/10.1021/acs.jpcc.1c00624
Opis:: Marie Skłodowska-Curie grant agreement No. 711859 to C.C. Ministry of Science and Higher Education of Poland for project No. 734276 , agreement No. 3854/H2020/17/2018/2.
We study ionic liquid–solvent mixtures in slit-shaped nanopores wider than a few ion diameters. Using a continuum theory and generic thermodynamic reasoning, we reveal that such systems can undergo a capillary ionization transition. At this transition, the pores spontaneously ionize or deionize upon infinitesimal changes of temperature, slit width, or voltage. Our calculations show that a voltage applied to a pore may induce a capillary ionization, which—counterintuitively—is followed by a re-entrant deionization as the voltage increases. We find that such ionization transitions produce sharp jumps in the accumulated charge and stored energy, which may find useful applications in energy storage and heat-to-energy conversion.
Dostawca treści:: Repozytorium Centrum Otwartej Nauki

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Skocz do pozycji: 5.

Tytuł:: Perhydropyrimidinylium and 1,3-diazepinylium salts as potential ionic liquids
Autorzy:: Zaleska, Barbara
Serda, Paweł
Karelus, Marcin
Flasiński, Michał
Opis:: Saturated or partially saturated heterocyclic compounds were uncovered as interesting and potential ionic liquid media. Zwitterionic compounds with perhydropyrimidinylium, 1,3- diazepinylium and quinazolinylium carbocations were utilized in the preparation of a variety of salts in order to search for new low-melting ionic media. Some of the zwitterionic quinazoline derivatives were also found to be low-melting glasses.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 6.

Tytuł:: The effect of ionic liquids with the tetrafluoroborate anion on terrestrial plants
Autorzy:: Biczak, R.
Pawłowska, B.
Tomczuk, K.
Feder-Kubis, J.
Tematy:: ionic liquids
tetrafluoroborate
ciecz jonowa
tetrafluoroboran; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/207364.pdf Link otwiera się w nowym oknie
Opis:: Ionic liquids have attracted considerable interest as excellent alternatives to organic solvents to be used in homogeneous and biphasic processes. Ionic liquids are non-volatile, non-flammable and their “green” character has usually been justified with their negligible vapour pressure. However, the marketing of any chemical substance requires the determination of their impact on all elements of nature. Determination of the potential ecotoxicity of new chemical compounds is associated with conducting research on the effects of those compounds on the growth and development of selected organism. The phytotoxic properties of chiral ionic salts with the alkylimidazolium cation and the tetrafluoroborate anion were assessed for selected weeds popular in Poland: gallant soldier (Galinsoga parviflora Cav.), white goosefoot (Chenopodium album L.) and common sorrel (Rumex acetosa L.). It was found that 3-alkyl-1-[(1R,2S,5R)-(–)-menthoxymethyl]imidazolium tetrafluoroborates – ([C₈-Im-Men][BF₄]) and ([C₉-Im-Men][BF₄]) were low toxic to plants. A higher toxicity to terrestrial plants was characterized by ([C₁₁-Im-Men][BF₄]). The toxicity effect of compounds depended non only on the length of the alkyl chain in the function group but also on the concentration of the used compound and the type of plant which was sprayed with the tested compound.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Ecotoxicity of ionic liquids as lubricants
Autorzy:: Kałdoński, T. J.
Kałdoński, T.
Załęska-Radziwiłł, M.
Pawlak, Z.
Tematy:: ionic liquids
ecotoxicity tests
Daphnia Magna; Pokaż więcej
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Powiązania:: https://bibliotekanauki.pl/articles/244323.pdf Link otwiera się w nowym oknie
Opis:: In this article there is discussed the influence of ionic liquids on natural environment on the basis of detailed analysis of the literature information and the results of the Authors' researches carried out within the framework of the development and research project no. PBR/15-249/2007/WAT-OR00002904 financed by Ministry of Science and Higher Education during 2007-2011. The literature information about toxic features of ionic liquids is very skimpy, but the detailed analysis of it and the results of our own researches allow us to say that not all ionic liquids should be treated as fully environmentally friendly substances. Among these substances, there are non-toxic and moderately toxic but there are very toxic liquids, too. Therefore, uncritical rating all ionic liquids among Green Chemistry is inappropriate. The test results of ionic liquids ecotoxicity were compared with the results obtained for standard oils used at lubrication technologies, particularly at motorization. All reference oils, according to EU classification, were non-toxic. The tests were carried out in accordance with OECD 202 European normative document, which recommends carrying out the tests for Daphnia Magna crustaceans. There were carried out: acute immobilization tests to Daphnia Magna, calculation of the effective concentrations EC50-t and evaluation of ionic and reference liquids toxicity with regard to used bioindicators
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Identifying of thermotropic liquid crystal phase and its influence on lubricity of ionic liquids
Autorzy:: Kałdoński, T. J.
Piecek, W.
Kałdoński, T.
Pawlak, Z.
Tematy:: mesophase identification
liquid crystals
ionic liquids; Pokaż więcej
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Powiązania:: https://bibliotekanauki.pl/articles/244373.pdf Link otwiera się w nowym oknie
Opis:: In this article there is discussed a possibility of forming the liquid crystal structure in ionic liquids and its influence on performance characteristics, especially tribological, of these liquids. Formation of such thermal phase might influence on, among other things, easier creation of the boundary lubricating film, which is characterized by high viscous anisotropy. The results of tribological tests showed better lubricity of selected ionic liquids than modern PFPE oils. Identification of mesophase in ionic liquids was necessary. This method is described in the paper. Biolar PL polarizing interference microscope with thermal stabilizing table, with birefraction system, and Brüker Discover 8 powder diffraction instrument with a Cu lamp and monochromator were used. There was being searched the state characterized simultaneously by optical anisotropy properties and liquid state of aggregation. For identification of phase transition temperature, the additional calorimetric tests were carried out during the cycle of heating and cooling. These researches were carried out within the framework of the development and research project no. PBR 15-249/2007/WAT-OR0002904, financed by Ministry of Science and Higher Education during 2007-2011.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Effect of proximity to ionic liquid-solvent demixing on electrical double layers
Autorzy:: Kondrat, Svyatoslav
Lomba, Enrique
Cruz, Carolina
Ciach, Alina
Wydawca:: Elsevier B.V.,
Cytata wydawnicza:: Cruz, Carolina, Svyatoslav Kondrat, Enrique Lomba, and Alina Ciach. "Effect of proximity to ionic liquid-solvent demixing on electrical double layers." Journal of Molecular Liquids 294 (2019): 111368. https://doi.org/10.1016/j.molliq.2019.111368
Opis:: There is a growing interest in the properties of ionic liquids (ILs) and IL-solvent mixtures at metallic interfaces, particularly due to their applications in energy storage. The main focus so far has been on electrical double layers with ILs far from phase transitions. However, systems in the vicinity of their phase transformations are known to exhibit some remarkable features, such as wetting transitions and capillary condensation. Herein, we develop a mean-field model suitable for the IL-solvent mixtures close to demixing, and combine it with the Carnahan-Starling (CS) and lattice-gas expressions for the excluded volume interactions. This model is then solved analytically, using perturbation expansion, and numerically. We demonstrate that, besides the well-known camel and bell-shaped capacitances, there is a bird-shaped capacitance, having three peaks as a function of voltage, which emerge due to the proximity to demixing. In addition, we find that the camel-shaped capacitance, which is a signature of dilute electrolytes, can appear at high IL densities for ionophobic electrodes. We also discuss the differences and implications arising from the CS and lattice-gas expressions for excluded volume interactions in the context of our model.
Marie Skłodowska-Curie grant agreement No. 711859 Ministry of Science and Higher Education of Poland for the project No. 734276, agreement No. 3854/H2020/17/2018/2
Dostawca treści:: Repozytorium Centrum Otwartej Nauki

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Skocz do pozycji: 10.

Tytuł:: O cieczach jonowych „w pigułce” (historia, właściwości i rozwój)
Ionic liquids „in a nutshell” (history, properties and development)
Autorzy:: Pernak, J.
Rzemieniecki, T.
Materna, K.
Tematy:: ciecze jonowe
generacje cieczy jonowych
aktywność biologiczna
ionic liquids
generations of ionic liquids
biological activity; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Przemysłu Chemicznego. Zakład Wydawniczy CHEMPRESS-SITPChem
Powiązania:: https://bibliotekanauki.pl/articles/1215325.pdf Link otwiera się w nowym oknie
Opis:: Opisano najważniejsze zagadnienia związane z historią cieczy jonowych, ich nazewnictwem oraz właściwościami. Przedstawiono rodzaje cieczy jonowych, z uwzględnieniem kryteriów podziału, które pozwalają na analizę ewolucji tych związków na przestrzeni minionych dwudziestu lat.
The most important issues related to the history of ionic liquids, their nomenclature and properties have been described. The types of ionic liquids, including criteria for the distribution, which allow the analysis of the evolution of these compounds over the past twenty years have been presented.
Dostawca treści:: Biblioteka Nauki

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