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Research paper thumbnail of Ionic liquids with dimethyl phosphate anion-Promising materials in science and technology

Ionic liquids (IL) have found different applications in chemistry and other branches of technique... more Ionic liquids (IL) have found different applications in chemistry and other branches of technique during the last quarter of century [1,2]. Combination of various cations and anions provides the possibility to adjust structures of ILs to intended applications in the very best way in contrast to traditional organic solvents (molecular liquids) that should be used without variations of their properties. Ammonium, phosphonium and different heterocyclic cations together with halide, sulfate, sulfonate, dimethyl phosphate (DMP) and other anions present a huge variety of IL. Salts with DMP anion (IL-DMP) form a small but highly promising group in the family of IL [3]. These materials are used in different branches of science and industry, the most popular their application being dissolution of biopolymers (mainly cellulose) from different biological resources (wood, sugarcane, etc.) [4-9]. Less attention is payed to extraction processes of other substances with IL-DMP (for example, polyte...

Research paper thumbnail of Ionic liquids and their modification with lithium salts –synthesis and studies

Nanostructured Composite Materials for Energy Storage and Conversion: collection of articles, 2019

Research paper thumbnail of Sulphur Containing Derivatives of Humic Substances and Their Use for Remediation of Contaminated Environments

Research paper thumbnail of Ionic liquids with Dimethyl Phosphate Anion as Highly Efficient Materials for Technological Processes: A Review

Int J Petrochem Res, 2018

Petrochemistry needs stable, environmentally-friendly and efficient materials for use in the tran... more Petrochemistry needs stable, environmentally-friendly and efficient materials for use in the transformation, purification, and analysis of oil products. Ionic liquids (ILs) meet these requirements. A novel group of ILs with a very specific anion-dimethyl phosphate (DMP) ion-has appeared recently and can be designated as ILs-DMP. The DMP anion increases hydrophilicity and allocates the complex-formation capacity to ILs-DMP. Although these new materials have been widely used in cellulose dissolution processes, they have not been explored sufficiently in petrochemistry. There is a reason to believe that, in comparison with other ILs, the DMP anion can also provide additional benefits in oil chemistry. Unfortunately, no collected information is available about ILs-DMP in literature. The information presented in the review can pave the way to new applications of these unique materials.

Research paper thumbnail of Designing highly efficient solvents for the Knoevenagel condensation: two novel dicationic dimethyl phosphate ionic liquids

Arkivoc

Two novel dicationic dimethyl phosphate ionic liquids have been designed as highly efficient solv... more Two novel dicationic dimethyl phosphate ionic liquids have been designed as highly efficient solvents for the Knoevenagel condensation between ethyl cyanoacetate and aldehyde with a decreased reactivity-4-(dimethylamino)benzaldehyde. A simple synthetic strategy has been demonstrated for obtaining the dicationic dimethyl phosphate ionic liquid bearing both aromatic imidazolium and aliphatic ammonium moieties.

Research paper thumbnail of Ionic Liquids as Solvents for the Knoevenagel Condensation: Understanding the Role of Solvent-Solute Interactions

New J. Chem., 2015

The hydrogen bond basicity β of ionic liquids, as demonstrated by the NMR studies and the Kamlet–... more The hydrogen bond basicity β of ionic liquids, as demonstrated by the NMR studies and the Kamlet–Taft linear solvation energy relationship, was confirmed to be the dominant solvent descriptor determining the rate of the Knoevenagel condensation.

Research paper thumbnail of Different Influence of Structure Elements of Ionic Liquids on the Knoevenagel Condensation Reactions

Green and Sustainable Chemistry

Research paper thumbnail of Unsubstituted <i>β</i>-Alkyl Aspartates as Highly Biodegradable and Almost Nontoxic Surfactants

Green and Sustainable Chemistry, 2016

Research paper thumbnail of A route to simple nonionic surfactants

Research paper thumbnail of Reactive Surfactants in Heterophase Polymerization. 10. Characterization of the Surface Activity of New Polymerizable Surfactants Derived from Maleic Anhydride

Research paper thumbnail of Maleic diamide polymerizable surfactants. Applications in emulsion polymerization

Comptes Rendus Chimie, Dec 31, 2003

Research paper thumbnail of ChemInform Abstract: One-Pot Three-Component Synthesis of Hantzsch 1,4-Dihydropyridines Promoted by Dimethyl Phosphate Ionic Liquids

Research paper thumbnail of Syntheses of Coumarins in Environmentally Friendly Ionics Liquids

Journal of Chemistry and Chemical Engineering, 2014

Research paper thumbnail of Zwitterionic sulfonates as m/z shift reagents for 5–methylcytosine detection in DNA using flow injection analysis and electrospray ionization mass spectrometry

European Journal of Mass Spectrometry, 2011

Research paper thumbnail of One-Pot Three-Component Synthesis of Hantzsch 1,4-Dihydropyridines Promoted by Dimethyl Phosphate Ionic Liquids

Helvetica Chimica Acta, 2015

Research paper thumbnail of Behaviour of Nanomaterials in the Environment: A Study of Interaction between Humic Acids and Fullerene C60

Latvian Journal of Chemistry, 2010

Research paper thumbnail of Liquid Chromatography - Mass Spectrometry of Zwitterionic Liquids

Latvian Journal of Chemistry, 2010

Research paper thumbnail of 1,3-Dialkylimidazolium Dimethyl Phosphates – Effective Solvents and Catalysts for Condensation Reactions

Latvian Journal of Chemistry, 2014

We report the preparation, characterization and exploitation of 1,3-dialkylimidazolium dimethyl p... more We report the preparation, characterization and exploitation of 1,3-dialkylimidazolium dimethyl phosphates. Condensation reactions of benzaldehyde with ethyl cyanoacetate and with malonic acid were performed in these ionic liquids either in absence or in presence of other catalysts. The effect of ionic liquid structure on the condensation reaction rates and yields was discussed

Research paper thumbnail of Synthesis of Β-Nitrostyrene in Highly Hydrophilic Ionic Liquid Media

Latvian Journal of Chemistry, 2014

The condensation reaction of benzaldehyde with nitromethane that resulted in the formation of β-n... more The condensation reaction of benzaldehyde with nitromethane that resulted in the formation of β-nitrostyrene was studied in ionic liquid media - (2-hydroxyethyl)ammonium carboxylates (formates, lactates, acetates) without application of any other catalyst. The dependence of product yield on the ionic liquid cation and anion structure, the polarity of the ionic liquid and the pseudo-pH value of the reaction medium was investigated. The highest yield of the condensation reaction product - β-nitrostyrene was achieved in (2-hydroxyethyl) ammonium formate medium

Research paper thumbnail of Cyclodehydration of Diols in Acidic Ionic Liquids

Latvian Journal of Chemistry, 2011

Cyclodehydration of Diols in Acidic Ionic Liquids In the presence of sulfonic acid group function... more Cyclodehydration of Diols in Acidic Ionic Liquids In the presence of sulfonic acid group functionalized Bronsted-acidic ionic liquids, cyclodehydration of 1,2-ethanediol and 1,4-butanediol is investigated. The role of structure and catalytic activity of ionic liquids on the formation of cyclic ethers: 1,4-dioxane and tetrahydrofuran - is determined.

Research paper thumbnail of Ionic liquids with dimethyl phosphate anion-Promising materials in science and technology

Ionic liquids (IL) have found different applications in chemistry and other branches of technique... more Ionic liquids (IL) have found different applications in chemistry and other branches of technique during the last quarter of century [1,2]. Combination of various cations and anions provides the possibility to adjust structures of ILs to intended applications in the very best way in contrast to traditional organic solvents (molecular liquids) that should be used without variations of their properties. Ammonium, phosphonium and different heterocyclic cations together with halide, sulfate, sulfonate, dimethyl phosphate (DMP) and other anions present a huge variety of IL. Salts with DMP anion (IL-DMP) form a small but highly promising group in the family of IL [3]. These materials are used in different branches of science and industry, the most popular their application being dissolution of biopolymers (mainly cellulose) from different biological resources (wood, sugarcane, etc.) [4-9]. Less attention is payed to extraction processes of other substances with IL-DMP (for example, polyte...

Research paper thumbnail of Ionic liquids and their modification with lithium salts –synthesis and studies

Nanostructured Composite Materials for Energy Storage and Conversion: collection of articles, 2019

Research paper thumbnail of Sulphur Containing Derivatives of Humic Substances and Their Use for Remediation of Contaminated Environments

Research paper thumbnail of Ionic liquids with Dimethyl Phosphate Anion as Highly Efficient Materials for Technological Processes: A Review

Int J Petrochem Res, 2018

Petrochemistry needs stable, environmentally-friendly and efficient materials for use in the tran... more Petrochemistry needs stable, environmentally-friendly and efficient materials for use in the transformation, purification, and analysis of oil products. Ionic liquids (ILs) meet these requirements. A novel group of ILs with a very specific anion-dimethyl phosphate (DMP) ion-has appeared recently and can be designated as ILs-DMP. The DMP anion increases hydrophilicity and allocates the complex-formation capacity to ILs-DMP. Although these new materials have been widely used in cellulose dissolution processes, they have not been explored sufficiently in petrochemistry. There is a reason to believe that, in comparison with other ILs, the DMP anion can also provide additional benefits in oil chemistry. Unfortunately, no collected information is available about ILs-DMP in literature. The information presented in the review can pave the way to new applications of these unique materials.

Research paper thumbnail of Designing highly efficient solvents for the Knoevenagel condensation: two novel dicationic dimethyl phosphate ionic liquids

Arkivoc

Two novel dicationic dimethyl phosphate ionic liquids have been designed as highly efficient solv... more Two novel dicationic dimethyl phosphate ionic liquids have been designed as highly efficient solvents for the Knoevenagel condensation between ethyl cyanoacetate and aldehyde with a decreased reactivity-4-(dimethylamino)benzaldehyde. A simple synthetic strategy has been demonstrated for obtaining the dicationic dimethyl phosphate ionic liquid bearing both aromatic imidazolium and aliphatic ammonium moieties.

Research paper thumbnail of Ionic Liquids as Solvents for the Knoevenagel Condensation: Understanding the Role of Solvent-Solute Interactions

New J. Chem., 2015

The hydrogen bond basicity β of ionic liquids, as demonstrated by the NMR studies and the Kamlet–... more The hydrogen bond basicity β of ionic liquids, as demonstrated by the NMR studies and the Kamlet–Taft linear solvation energy relationship, was confirmed to be the dominant solvent descriptor determining the rate of the Knoevenagel condensation.

Research paper thumbnail of Different Influence of Structure Elements of Ionic Liquids on the Knoevenagel Condensation Reactions

Green and Sustainable Chemistry

Research paper thumbnail of Unsubstituted <i>β</i>-Alkyl Aspartates as Highly Biodegradable and Almost Nontoxic Surfactants

Green and Sustainable Chemistry, 2016

Research paper thumbnail of A route to simple nonionic surfactants

Research paper thumbnail of Reactive Surfactants in Heterophase Polymerization. 10. Characterization of the Surface Activity of New Polymerizable Surfactants Derived from Maleic Anhydride

Research paper thumbnail of Maleic diamide polymerizable surfactants. Applications in emulsion polymerization

Comptes Rendus Chimie, Dec 31, 2003

Research paper thumbnail of ChemInform Abstract: One-Pot Three-Component Synthesis of Hantzsch 1,4-Dihydropyridines Promoted by Dimethyl Phosphate Ionic Liquids

Research paper thumbnail of Syntheses of Coumarins in Environmentally Friendly Ionics Liquids

Journal of Chemistry and Chemical Engineering, 2014

Research paper thumbnail of Zwitterionic sulfonates as m/z shift reagents for 5–methylcytosine detection in DNA using flow injection analysis and electrospray ionization mass spectrometry

European Journal of Mass Spectrometry, 2011

Research paper thumbnail of One-Pot Three-Component Synthesis of Hantzsch 1,4-Dihydropyridines Promoted by Dimethyl Phosphate Ionic Liquids

Helvetica Chimica Acta, 2015

Research paper thumbnail of Behaviour of Nanomaterials in the Environment: A Study of Interaction between Humic Acids and Fullerene C60

Latvian Journal of Chemistry, 2010

Research paper thumbnail of Liquid Chromatography - Mass Spectrometry of Zwitterionic Liquids

Latvian Journal of Chemistry, 2010

Research paper thumbnail of 1,3-Dialkylimidazolium Dimethyl Phosphates – Effective Solvents and Catalysts for Condensation Reactions

Latvian Journal of Chemistry, 2014

We report the preparation, characterization and exploitation of 1,3-dialkylimidazolium dimethyl p... more We report the preparation, characterization and exploitation of 1,3-dialkylimidazolium dimethyl phosphates. Condensation reactions of benzaldehyde with ethyl cyanoacetate and with malonic acid were performed in these ionic liquids either in absence or in presence of other catalysts. The effect of ionic liquid structure on the condensation reaction rates and yields was discussed

Research paper thumbnail of Synthesis of Β-Nitrostyrene in Highly Hydrophilic Ionic Liquid Media

Latvian Journal of Chemistry, 2014

The condensation reaction of benzaldehyde with nitromethane that resulted in the formation of β-n... more The condensation reaction of benzaldehyde with nitromethane that resulted in the formation of β-nitrostyrene was studied in ionic liquid media - (2-hydroxyethyl)ammonium carboxylates (formates, lactates, acetates) without application of any other catalyst. The dependence of product yield on the ionic liquid cation and anion structure, the polarity of the ionic liquid and the pseudo-pH value of the reaction medium was investigated. The highest yield of the condensation reaction product - β-nitrostyrene was achieved in (2-hydroxyethyl) ammonium formate medium

Research paper thumbnail of Cyclodehydration of Diols in Acidic Ionic Liquids

Latvian Journal of Chemistry, 2011

Cyclodehydration of Diols in Acidic Ionic Liquids In the presence of sulfonic acid group function... more Cyclodehydration of Diols in Acidic Ionic Liquids In the presence of sulfonic acid group functionalized Bronsted-acidic ionic liquids, cyclodehydration of 1,2-ethanediol and 1,4-butanediol is investigated. The role of structure and catalytic activity of ionic liquids on the formation of cyclic ethers: 1,4-dioxane and tetrahydrofuran - is determined.