Deep eutectic solvents

This work aims to investigate the mechanism of Pd nucleation and growth onto glassy carbon electrode from ChCl/urea/palladium mixture at room temperature using cyclic voltammetry (CV) and chronoamperometry (CA) techniques. Furthermore, X-ray diffraction, scanning electron microscopy and energy dispersive X-ray spectroscopy were used to examine the crystalline structure, morphology and compositions of deposited Pd samples.

14p viambani 18-06-2024 2 1   Download

In this work, we replaced the conventional solvents such as dimethyl sulfoxide (DMSO) or dimethylformamide (DMF) by deep eutectic solvents (DES) in the synthesis of methylammonium lead iodide perovskite (MAPbI3). The first DES system was based on the combination of acetamide and urea (A–U–P system), the homogenous solution was formed at relative low temperature (~40℃). For the second system which was based on acetamide and choline chloride (A–C–P system), lead nitrate only dissolved at higher temperature (~100℃).

6p dianmotminh02 03-05-2024 4 2   Download

Ebook "Organic sonochemistry: Challenges and perspectives for the 21st century" provides informative, useful, and stimulating reading on the topic of organic sonochemistry – the core of ultrasound-based applications. Given the increasing interest in new and improved technologies, allied to their green and sustainable character (not always a valid premise), there is a great attraction for organic chemists to apply these protocols in synthesis and process chemistry.

130p tracanhphuonghoa1007 22-04-2024 7 3   Download

We report a low cost and environmentally-friendly solvent system to synthesize TiO2 nanoparticles using an acidic deep eutectic solvent, choline chloride/p-toluene sulphonic acid as a templating and hydrolyzing agent via solegel method.

7p viberbers 09-08-2023 6 3   Download

This paper presents a methodology for studying nucleation and growth mechanisms of metals onto a glassy carbon electrode in a deep eutectic solvent (DES), a mixture of choline chloride and urea at a molar ratio of 1:2. Characteristics and composition of Co(II) complexes formed with the DES were evaluated by means of UV-vis measurements, which confirmed the good stability of these species at room temperature.

12p vidudley 20-02-2023 4 2   Download

Biorefinery with deep eutectic solvent (DES) is an emerging processing technology to overcome the shortcomings of conventional biomass pretreatments. This work evaluates the biorefinery of sugarcane bagasse (SCB) with DES formulated with choline chloride as hydrogen bond acceptor and three hydrogen bond donors: lactic acid, citric acid, and acetic acid.

8p vihermione 30-12-2022 9 2   Download

Natural deep eutectic solvents (NADES) made mainly with abundant primary metabolites are being increasingly applied in green chemistry. The advantages of NADES as green solvents have led to their use in novel green products for the food, cosmetics and pharma markets.

10p viginny 23-12-2022 6 2   Download

The presented paper is the first to show thin layer chromatography (TLC) analysis based on eutectic mobile phases (Deep Eutectic Solvents – DES). During the experiment 25 eutectic mixtures were investigated for their chromatographic properties.

6p viginny 23-12-2022 7 3   Download

The present paper defines the optimal extraction window (OEW) for three-phase membrane-based liquidphase microextraction (MP-LPME) in terms of analyte polarity (log P), and anchors this to existing theories for equilibrium partitioning and kinetics. Using deep eutectic solvents (DES) as supported liquid membranes (SLM), we investigated how the OEW was affected by ionic-, hydrogen bond and π-π interactions between the SLM and analyte.

8p viginny 23-12-2022 7 3   Download

In this work, the application of betaine-based hydrophilic natural deep eutectic solvents (NADESs) as green extraction solvents was proposed for the first time for the evaluation of twelve pesticides in citrus and olive by-products intended to be applied as potential sources of compounds with neuroprotective activity against Alzheimer Disease.

12p viginny 23-12-2022 8 3   Download

An Electrokinetic Chromatography (EKC) method was developed in this work enabling for the first time the separation of the four stereoisomers of the acetamide herbicide dimethenamid. A screening of different anionic cyclodextrins (CDs) revealed that the use of a single CD system did not allow the separation of the four dimethenamid stereoisomers while dual systems improved the chiral separation.

9p vironald 15-12-2022 11 3   Download

Development of green approaches have emerged as a challenge that highlight the pressing need for nontoxic solvents, miniaturized method and bio-degradable materials. In this regard, an environmentallyfriendly microfluidic system based on natural deep eutectic solvents (DESs) immobilized in agarose membranes was developed to extract parabens from urine samples for the first time.

7p vironald 15-12-2022 9 2   Download

The paper presents a new kind of stationary phase for gas chromatography based on deep eutectic solvents (DES) in the form of a mixture of L-proline (protonated with hydrochloric acid) as a hydrogen bond acceptor (HBA) and xylitol as a hydrogen bond donor (HBD) in a molar ratio of HBA:HBD 5:1.

8p vironald 15-12-2022 4 2   Download

Kết quả nghiên cứu phổ hồng ngoại của DES điều chế cho thấy có sự hình thành tương tác liên kết hydrogen liên phân tử giữa L-proline và acid para-toluenesulfonic. Điều kiện thực hiện phản ứng tốt nhất thu được sau khi khảo sát: nhiệt độ phản ứng 80oC, thời gian phản ứng 120 phút, tỉ lệ benzaldehyde:o phenylenediamine=2:1 (mmol) và lượng xúc tác sử dụng là 30% mol so với o-phenylenediamine.ài viết "DES điều chế từ Acid p-toluenesulfonic xúc tác chọn lọc hiệu quả phản ứng tổng hợp dẫn xuất benzimidazole trong điều kiện không dung môi. Cùng tham khảo chi tiết bài viết tại đây nhé các bạn.

10p phuongnguyen0520 14-12-2022 10 3   Download

Deep eutectic solvent (DES) from choline chloride and phenol (ChCl-phenol) was successfully synthesized by a simple method and characterized by modern techniques (FT-IR, NMR, TGA, DSC). With many advantages such as low-cost preparation, thermal-stability, and biodegradability, ChCl-phenol could be applied as a potential solvent for liquid electrolyte preparation in the dye-sensitized solar cells (DSSCs).

7p viclerkmaxwel 16-02-2022 16 2   Download

A straightforward method for the preparation of benzo[4,5]imidazo[1,2-a]pyrimidine derivatives catalysed by an acidic deep eutectic solvent from choline chloride (ChCl) and phenol via the Biginelli reaction of 2-aminobenzimidazole, ethyl acetoacetate, and aldehydes has been developed under metal- and solvent-free conditions. The desired products were obtained in moderate to good yield (49-79%) and the DESs were known as an economical and environmentally friendly catalyst.

3p princessmononoke 29-11-2021 11 1   Download

Đề tài nghiên cứu đã khảo sát thành phần, hàm lượng acid béo trong mỡ cá basa bằng dung môi truyền thống và xây dựng qui trình tách acid béo ra khỏi phụ phẩm của quá trình chế biến phile cá basa; nghiên cứu tổng hợp các dung môi sâu (Deep Eutectic Solvent) trên cơ sở choline chloride với urea và đồng đẳng (methylurea, thiourea và methylthiourea) xác định tính chất của chúng,... Mời các bạn cùng tham khảo.

31p capheviahe27 23-02-2021 27 3   Download

The goals of the dissertation: Synthesizing deep eutectic solvents based on choline chloride with the compounds of 2-alkylbenzimidazole/ethylene glycol and determining their structures; using synthetic deep eutectic solvents to enrich and separate Omega-3,6,9 from waste fat in accordance with the facrories’ procedure of processing Vietnamese basa fish for export.

31p capheviahe27 23-02-2021 25 3   Download

The present study demonstrated the pretreatment of rice straw using deep eutectic solvent (DES), choline chloride:urea and its comparison with acid and alkaline pretreatment. At a solid loading of 10%, choline chloride (ChCl):urea (1:2) was very effective in lignin extraction from rice straw at 45 °C.

7p caygaocaolon2 14-03-2020 12 1   Download

S (deep eutectic solvents) [CholineCl][ZnCl2]3, được tạo thành từ choline chloride và zinc chloride (ZnCl2), với những ưu điểm vượt bậc như dễ dàng điều chế bằng phương pháp đun khuấy từ, xúc tác hiệu quả cho phản ứng acyl hóa các alcohol bậc 2 và anhydride acid với quy trình thực hiện phản ứng đơn giản dưới sự kích hoạt bằng phương pháp siêu âm cho hiệu suất cao. Phản ứng được thực hiện trên 6 alcohol bậc hai khác nhau trong thời gian 5 phút ở nhiệt độ phòng, hiệu suất sản phẩm thu được rất cao (88 – 96%).

8p gildur 30-11-2019 23 1   Download