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Ionic Liquids

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Efficient reductive Claisen rearrangement of prop-2’-enyloxyanthraquinones and 2’-chloroprop-2’-enyloxyanthraquinones with iron powder in ionic liquids

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All reactions are performed in a mixture of two ionic liquids containing 1- benzyl-3-methylimidazolium chloride [Bzmim]Cl and 1-methylimidazolium tetrafluoroborate [Hmim]BF 24 4 in short reaction times (Figure 1).. Reductive Claisen rearrangement of 1 and 20 to products 2 and 21 respectively using iron powder in a mixture of two ionic liquids, [Hmim]BF 4 and [Bzmim]Cl..

A thesis submitted in fulfilment of the requirements for the degree of Master of Applied Science: Designing protic ionic liquids to be compatible with biomolecules

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Figure 1.5: The chemical structures of aprotic ionic liquids a. One of the major issues with using aprotic ionic liquids with proteins is that the commonly selected anions, such as PF 6 , Br. Each of the other. Figure 1.6: The four protic ionic liquids selected for the first experimental chapter.. Figure 1.7: The nine protic ionic liquids selected for the second experimental chapter..

Sơ chế sinh khối bằng chất lỏng ion (Ionic liquids) -P1

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Sơ chế sinh khối bằng chất lỏng ion (Ionic liquids) -P1. Các hợp chất muối lỏng (còn gọi là chất lỏng ion) cho thấy sự hứa hẹn là một dung môi dùng cho xử lý sinh khối lignocellulose. Nhưng liệu sự tiếp cận này chỉ là một tò mò khoa học hay đây là một công nghệ tiên tiến trong sơ chế nguyên liệu đầu vào của nhiên liệu sinh học có thể thương mại hóa?. Sinh khối lignocellulose là nguồn carbon tái sinh được và dồi dào bậc nhất trên hành tinh chúng ta.

Sơ chế sinh khối bằng chất lỏng ion (Ionic liquids) -P2

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Sơ chế sinh khối bằng chất lỏng ion (Ionic liquids) –P2. Dùng muối lỏng làm dung môi cho lignocellulose. Các muối lỏng ( hay còn gọi là chất lỏng ion) là nhóm dung môi tương đối mới. Chúng được phát triển vào những năm thập niên 1980 như một thay thế thân thiện môi trường cho các dung môi hữu cơ truyền thống. Một hợp chất muối lỏng gồm các anion và cation hữu cơ có sự kết hợp lỏng lẻo, có điểm nóng chảy thấp dưới 100 oC. Hiện có hàng trăm loại muối lỏng.

Tunable aryl alkyl pyrazolium tetrafluoroborate ionic liquids/salts: synthesis, characterization, and applications for removal of methyl orange from aqueous solution

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The optional second step of the IL synthesis is anion metathesis or anion exchange reactions to obtain ionic liquids with desired anions [8-14].. The properties of TAAILs could be changed by electronic and steric effects of the substituent at the aryl ring .

Ultrasound-assisted surfactant/ionic liquid aqueous two-phase system extraction prior to high performance liquid chromatography for the determination of tetracyclines in milk and honey samples

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The results of analysis are given for the synthesized ionic liquids as follows:. AMIM-BF 4 . BMIM-BF 1 4.

Aqueous two-phase extraction technique based on magnetic ionic liquid-nonionic surfactant for phenolic acids in grape, apple, pear, and banana

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As the volume of ionic liquid affects the formation of phase separation in IL-ATPE, the optimization of the volume of ionic liquid is an important parameter. The use of more ionic liquid can enhance the recovery of phenolic acid. The extraction efficiency can also decrease due to the higher viscosity of the ionic liquid [22].. In experiments with three ionic liquids, the recoveries of phenolic acids first quickly increased, then quickly decreased with the increase of the volume of ionic liquid.

Electrochemical Capacitors: Ionic Liquid Electrolytes

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Ania CO, Pernak J, Stefaniak F, Raymundo-Pin˜ero E, and Be´guin F (2006) Solvent-free ionic liquids as in situ probes for assessing the effect of ion size on the performance of electrical double layer capacitors. Safe, high-energy supercapacitors based on solvent-free ionic liquid electrolytes. Proceedings of the International Conference ‘Ionic Liquids for Electrochemical Devices.’ Roma, Italy..

Gaseous and dissolved oxygen sensing with stabilized pyrene in ionic liquid modified electrospun slides

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In our proposed sensor, the ionic liquids not only increased the gas solubility of the matrix but also behaved as an internal buffering system that increased the stability of the pyrene dye even under the ambient air of the laboratory conditions. 41,42 Additionally, the presence of ionic liquid in the sensing cocktail facilitated the electrospinning process by increasing the electrical conductivity in the media. The structures of the employed ionic liquids are shown in Figure 1..

Nghiên cứu tính chất của các chất lỏng Ion và ứng dụng trong phân tích điện hóa

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Anouti, M.r.m., et al. (2008), Synthesis and Characterization of New Pyrrolidinium Based Protic Ionic Liquids. Appetecchia, G.B., et al (2011), Chemical–physical properties of bis(perfluoroalkylsulfonyl)imide-based ionic liquids. Abedin (2006), Air and water stable ionic liquids in physical chemistry. Faridbod, F., et al., Application of Room Temperature Ionic Liquids in Electrochemical Sensors and Biosensors..

Synthesis and application of polyvinylimidazole-based Brønsted acidic ionic liquid grafted silica as an efficient heterogeneous catalyst in the preparation of quinoxaline derivatives

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Key words: Polymeric ionic liquid grafted silica, heterogeneous catalyst, quinoxaline. Brønsted acidic ionic liquids (BAILs) are a group of ILs with special importance because they possess the proton acidity and characteristic properties of an ionic liquid simultaneously. Although the IL used as catalyst maybe recyclable by distillation of the product from the resulting mixture, simpler catalyst separation processes remain a challenge.

Poly(4-vinylpyridine)-supported dual acidic ionic liquid: an environmentally friendly heterogeneous catalyst for the one-pot synthesis of 4,4’-(arylmethylene)bis(3-methyl-1-phenyl-1H-pyrazol-5-ols)

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Key words: 3-Methyl-l-phenyl-5-pyrazolone, aldehydes, ionic liquid, one-pot synthesis, heterogeneous catalysis. These ionic liquids are of special importance because they possess simultaneously proton acidity and the characteristic properties of an ionic liquid.

Preparation of a novel solid acid catalyst with Lewis and Brønsted acid sites and its application in acetalization

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Acid catalyzed reactions have been widely used in the modern chemical industry. 1,2 As a kind of environmentally friendly catalyst, Brønsted or Lewis acidic ionic liquids have attracted much attention from researchers due to the combination of the advantages of ionic liquid and solid acid. 3,4 Many organic reactions, such as esterification, acetalization, and carbonylation, can be realized with excellent yields and selectivities using these acidic ionic liquids as the catalyst.

Spectrophotometric determination of iron species using ionic liquid ultrasound assisted dispersive liquid–liquid microextraction

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In this work the advantages of ionic liquids, ultrasound, and DLLME were combined and an ionic liquid ultrasound assisted dispersive liquid–liquid microextraction (IL-USA-DLLME) method for the preconcentration and speciation of iron in aqueous samples was developed. The hydrophobic ionic liquid 1-hexyl-3-methylimidazolium hexafluorophosphate [C 6 MIM][PF 6 ] was chosen as the extraction solvent.

Study on the SiO2 supported ionic liquid phase (SILP) catalysts for the hydroformylation of ethylene

240970-ND.pdf

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activity for the hydroformylation of ethylene Catalytic activity for the hydroformylation of pentene 103 3.2.3 Discussion 107 CONCLUSION 110 References Appendix 111 LIST OF TABLE Table Title Page 1.1 Developments in hydroformylation processes 12 1.2 Classification of immobilised metal complex catalysts 17 1.4 Supported ionic liquid phase hydroformylation in ionic liquids 30 1.5 Supports used for SILP-catalysed hydroformylation of propene 32 2.1 Summary of synthesized catalysts 40 2.2 Retention times

Ionic liquid-based graphene oxide-coated fiber for headspace-solid phase microextraction of polycyclic aromatic hydrocarbons in water samples

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Bis(trifluoromethanesulfonyl)imide-based ionic liquids grafted on graphene oxide-coated solid-phase microextraction fiber for extraction and enrichment of polycyclic aromatic hydrocarbons in potatoes and phthalate esters in food-wrap. Polyaniline-dicationic ionic liquid coated with magnetic nanoparticles composite for magnetic solid phase extraction of polycyclic aromatic hydrocarbons in environmental samples.

Synthesis and liquid crystalline properties of new triazine-based π-conjugated macromolecules with chiral side groups

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Ionic liquid crystals can be considered as the materials that combine the properties of liquid crystals and ionic liquids. A growing interest has been devoted to the research activities in the field of ionic liquids worldwide [16-18]. A large number of literature reports are available on the liquid crystalline properties of the charged materials containing anions and cations .

Development of a nanoscale-based optical chemical sensor for the detection of NO radical

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We applied silver nanoparti- cles and ionic liquids in the fabrication process of polymeric electrospun fibers and thin films. Presence of the ionic liquid enhanced the sensor response in all of the test moieties. Some are solid phase sensors based on entrapment of the sensing dye in different. The suggested sensor uses the solid PVC and sol gel matrix material, which plays an important role in the stability and sensitivity of the sensor.

Tổng hợp và đặc trưng xúc tác tẩm chất lỏng ion (SILP) imidazol chứa phức rodi mang trên các chất mang rắn cho phản ứng hydroformyl hóa etylen (Synthesis and characterization of the imidazolium ionic liquid phase catalyst containing rhodium complex on solid supports for the hydroformylation of ethylene)

000000277247-1.pdf

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liquid phase catalyst [13. 26 Figure 1.9 Most common cations and anions of Ionic Liquids [48. 29 Figure 1.10 Excess phosphine arises from the facile Rh-PPh3 dissociation equilibrium [103, 104. 31 Figure 1.11 Various ways of acac to bond with metal [28. 32 Figure 1.12 Schematic P-T phase diagram of ZrO2 [78. 35 Figure 1.13 Three phases of ZrO2 [78. 35 Figure 1.14 Synthesis of SBA-15 mesoporous silica [108. 37 Figure 1.15 Schematic view of Schlenk line. 38 Figure 2.1 Setup for the synthesis of Ligand

Metal- and solvent-free preparation of benzo[4,5]imidazo[1,2-a]pyrimidine derivatives catalysed by deep eutectic solvents

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Morris (2004), “Ionic liquids and eutectic mixtures as solvent and template in synthesis of zeolite analogues”, Nature, 430, pp.1012-1016.. Data, 53(2), pp.548-550. Kazlauskas (2008), “Hydrolase-catalysed biotransformations in deep eutectic solvents”, Chem. Commun., (10), pp.1235-1237.. Ryder (2014), “Deep eutectic solvents (DESs) and their applications”, Chem. Chem., 24(1), pp.1317-1319..