Phosphonium and Ammonium Ionic Liquids with Aromatic Anions: Synthesis, Properties, and Platinum Extraction

2010 ◽  
Vol 63 (3) ◽  
pp. 511 ◽  
Author(s):  
Anja Stojanovic ◽  
Daniel Kogelnig ◽  
Lisa Fischer ◽  
Stephan Hann ◽  
Markus Galanski ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Water Solubility ◽  
Aqueous Media ◽  
Chemical Properties ◽  
Aliquat 336 ◽  
Physico Chemical ◽  
Synthesis Properties ◽  
Aromatic Anions ◽  
Extracting Agents ◽  
Ammonium Ionic Liquids

Several hydrophobic long-chain quaternary ammonium and phosphonium ionic liquids (ILs) with functionalized aromatic anions were prepared following a metathesis route using tricaprylmethylammonium chloride (Aliquat 336) and trihexyl(tetradecyl)phosphonium chloride (Cyphos IL101) as precursors. The incorporation of aromatic anions bearing hydroxy-, methoxy-, thiol-, and thioether functionalities as well as tetraphenylborate anions resulted in an increased chemical stability of the ILs and an alteration of their physico-chemical properties. Furthermore, aromatic anions significantly decreased the water solubility and water uptake of both ammonium and phosphonium-based ILs. Thiol- and thioether ILs were applied for the extraction of platinum from aqueous phase using liquid phase micro-extraction. Time dependent studies showed a rapid elimination of up to 95% platinum after 30 min. With a leaching of the anion <0.01 wt-% into the aqueous media, the evaluated ILs were found to be suitable as extracting agents for platinum from aqueous solutions.

15N NMR studies provide insights into physico-chemical properties of room-temperature ionic liquids

2021 ◽  
Author(s):  
Christoph Wiedemann ◽  
David Fushman ◽  
Frank Bordusa
Keyword(s):  
Ionic Liquids ◽  
Room Temperature ◽  
Chemical Properties ◽  
Room Temperature Ionic Liquids ◽  
15N Nmr ◽  
Nmr Studies ◽  
Physico Chemical ◽  
Alternative Solvents

Ionic liquids (ILs) have gained a lot of attention as alternative solvents in many fields of science in the last two decades. It is known that the type of anion...

Ionic Liquids in Analytical Chemistry: Applications and Recent Trends

2021 ◽  
Vol 17 ◽  
Author(s):  
Giuseppe Maria Merone ◽  
Angela Tartaglia ◽  
Enrica Rosato ◽  
Cristian D’Ovidio ◽  
Abuzar Kabir ◽  
...  
Keyword(s):  
Analytical Chemistry ◽  
Ionic Liquids ◽  
Stationary Phases ◽  
Extraction Procedure ◽  
Chemical Properties ◽  
Electrochemical Analysis ◽  
Physico Chemical ◽  
Recent Trends ◽  
Number Of Publications ◽  
Physical And Chemical

Background: Ionic liquids (ILs) are a unique class of compounds consisting exclusively of cations and anions that possess distinctive properties such as low volatility, high thermal stability, miscibility with water and organic solvents, electrolytic conductivity and non-flammability. Ionic liquids have been defined as "design solvents", because it is possible to modify their physical and chemical properties by appropriately choosing cations and anions, in order to meet the specific characteristics based on their potential application. Introduction: Due of their tunable nature and properties, ILs are considered as the perfect candidates for numerous applications in analytical chemistry including sample preparation, stationary phases in liquid or gas chromatography, additives in capillary electrophoresis, or in mass spectrometry for spectral and electrochemical analysis. In the last years, the number of publications regarding ILs has rapidly increased, highlighting the broad applications of these compounds in various fields of analytical chemistry. Results: This review first described the main physico-chemical characteristics of ionic liquids, and subsequently reported the various applications in different subdisciplines of analytical chemistry, including the extraction procedure and separation techniques. Furthermore, in each paragraph the most recent applications of ionic liquids in the food, environmental, biological, etc. fields have been described. Conclusion: Overall, the topic discussed highlights the key role of ionic liquids in analytical chemistry, giving hints for their future applications in chemistry but also in biology and medicine.

scholarly journals Estimation of the retention behaviour of s-triazine derivatives applying multiple regression analysis of selected molecular descriptors

2013 ◽  
pp. 229-237 ◽  
Author(s):  
Lidija Jevric ◽  
Sanja Podunavac-Kuzmanovic ◽  
Strahinja Kovacevic ◽  
Natasa Kalajdzija ◽  
Bratislav Jovanovic
Keyword(s):  
Dissociation Constant ◽  
Water Solubility ◽  
Molecular Descriptors ◽  
Chemical Properties ◽  
Log P ◽  
Retention Factors ◽  
Solute Retention ◽  
Physico Chemical ◽  
Hydrophilic Lipophilic Balance ◽  
Triazine Derivatives

The estimation of retention factors by correlation equations with physico-chemical properties can be of great helpl in chromatographic studies. The retention factors were experimentally measured by RP-HPTLC on impregnated silica gel with paraffin oil using two-component solvent systems. The relationships between solute retention and modifier concentration were described by Snyder?s linear equation. A quantitative structure-retention relationship was developed for a series of s-triazine compounds by the multiple linear regression (MLR) analysis. The MLR procedure was used to model the relationships between the molecular descriptors and retention of s-triazine derivatives. The physicochemical molecular descriptors were calculated from the optimized structures. The physico-chemical properties were the lipophilicity (log P), connectivity indices (?), total energy (Et), water solubility (log W), dissociation constant (pKa), molar refractivity (MR), and Gibbs energy (GibbsE) of s-triazines. A high agreement between the experimental and predicted retention parameters was obtained when the dissociation constant and the hydrophilic-lipophilic balance were used as the molecular descriptors. The empirical equations may be successfully used for the prediction of the various chromatographic characteristics of substances, with a similar chemical structure.

ChemInform Abstract: Physico-Chemical Properties of Task-Specific Ionic Liquids

ChemInform ◽  
2013 ◽  
Vol 44 (31) ◽  
pp. no-no
Author(s):  
Luis C. Branco ◽  
Goncalo V. S. M. Carrera ◽  
Joao Aires-de-Sousa ◽  
Ignacio Lopez Martin ◽  
Raquel Frade ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Chemical Properties ◽  
Physico Chemical

An overview of Natural Superdisintegrants

2021 ◽  
pp. 113-124
Author(s):  
Shushank Sharma
Keyword(s):  
Gastrointestinal Tract ◽  
Aqueous Media ◽  
Chemical Properties ◽  
Cost Effective ◽  
Oral Route ◽  
Drug Formulation ◽  
Release Time ◽  
Disintegration Time ◽  
Physico Chemical ◽  
Set Up

The oral route is the most convenient route of administration for various drugs. It is viewed as the most convenient, most secure, and economical route for patients. Fast disintegrating tablets are popular these days as they disintegrate in the mouth within a few seconds without the use of water. The burdens of regularly used medications in pediatric and geriatric patients have been overwhelmed by quick-dissolving tablets. Natural superdisintegrants have been used for fast-dissolving tablets because they are biodegradable, chemically inert, non-harmful, more affordable, and generally accessible. Natural polymer improves the properties of the tablet as it is commonly used as diluents and binders. Natural super disintegrants decrease the release time and give healthful results to the patients. Most polymers are obtained from nature, they are cost-effective, non-toxic, and non-irritants. Disintegration is the most important step for releasing the drug from the tablet matrix to decrease the disintegration time. In this, drug and polymers come in contact with water, it swells, hydrate, and react chemically to release the drug in the mouth and gastrointestinal tract. Superdisintegrants are those substances that encourage the quick breaking down with a lesser amount contrasted with disintegrants. The quick disintegrants tablets are set up by utilizing suitable polymers which rely on the Physico-chemical properties of drugs and excipients, for example, drug and polymer compatibility, hardness and thickness of tablet, nature of drug and excipients, PH of drug and release parameters of drug formulation. Superdisintegrants are the vehicles added to tablet formulation to advance the breaking of tablets and capsules into small microparticles in aqueous media resulting in to increase in the surface area and promote quick drug release. The disintegrants have a significant capacity to oppose the efficacy of tablet binders and compression forces to form the tablet. Commonly there are three methods to incorporate disintegrants into the tablet: A. Inner addition, B. External expansion, C. Internal, and external addition. Most of the regularly based tablets are those expected to be swallow, disintegrate and release medicaments in the gastrointestinal tract but over a while tablets are manufactured to deliver medicaments in the mouth and gastrointestinal tract within few seconds of swallowing. It has been demonstrated that characteristic polymers are more effective than synthetic polymers. Some research is going to develop safe and effective medication with super disintegrating agents that can be dissolved rapidly to treat the disease.

ChemInform Abstract: Physico-Chemical Properties and Phase Behavior of Piperidinium-Based Ionic Liquids

ChemInform ◽  
2012 ◽  
Vol 43 (24) ◽  
pp. no-no
Author(s):  
Urszula Domanska ◽  
Marta Krolikowska ◽  
Kamil Paduszynski
Keyword(s):  
Ionic Liquids ◽  
Phase Behavior ◽  
Chemical Properties ◽  
Physico Chemical

Viscosity models for ionic liquids and their mixtures

2020 ◽  
Author(s):  
Anya Fettouma Bouarab ◽  
Jean-Philippe Harvey ◽  
Christian Robelin
Keyword(s):  
Ionic Liquids ◽  
Process Optimization ◽  
Chemical Properties ◽  
Viscosity Models ◽  
Physico Chemical

As the field of ionic liquids matures to more industrially implemented applications, robust models of their physico-chemical properties become necessary for process optimization. Viscosity is a particularly difficult property to...

Density Measurement of Pyridine Based Ionic Liquids and Methanol Binary Mixtures

2013 ◽  
Vol 675 ◽  
pp. 248-251
Author(s):  
Zhuo Li ◽  
Chang Ping Li
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Energy Storage ◽  
Binary Mixtures ◽  
Density Measurement ◽  
Chemical Properties ◽  
Storage Material ◽  
Physico Chemical ◽  
New Energy ◽  
Energy Storage Material

As a new environmentally friendly solvent, ionic liquids have been investigated widely. The lack of physico-chemical properties data of ionic liquids has become a bottleneck that restricts their applications. In this study, the investigation of the density for binary mixtures of CnpyNTf2 (n = 2, 4, 5) and methanol is measured using Westphal balance. This study would be very important for the application of binary mixtures of ionic liquid and methanol in developing new energy storage material.

Tailoring ionic liquid catalysts: structure, acidity and catalytic activity of protonic ionic liquids based on anionic clusters, [(HSO4)(H2SO4)x]− (x = 0, 1, or 2)

2014 ◽  
Vol 16 (7) ◽  
pp. 3463-3471 ◽  
Author(s):  
Karolina Matuszek ◽  
Anna Chrobok ◽  
Fergal Coleman ◽  
Kenneth R. Seddon ◽  
Małgorzata Swadźba-Kwaśny
Keyword(s):  
Ionic Liquid ◽  
Catalytic Activity ◽  
Ionic Liquids ◽  
Chemical Properties ◽  
Esterification Reaction ◽  
Anionic Clusters ◽  
Physico Chemical

The speciation of a family of inexpensive, easily prepared protonic ionic liquids, their physico-chemical properties and their performance as catalysts in the model esterification reaction have been correlated.

Sign in / Sign up

Export Citation Format

Share Document