Green solvents

The flavanone glycoside naringin, which is abundant in the very immature pomelo peel cultivated in Vietnam, has been demonstrated to have potential use in semisynthesis into other flavonoid compounds, especially apigenin, which exhibits several biological properties and has a greater commercial value. In this study, we carried out an oxidation reaction on flavanone backbone to semisynthesize apigenin with I2 catalyst in some environmentally friendly solvents such as a replacement for the reaction in the pyridine solvent, which is thought to be a non-green solvent.

6p dianmotminh02 03-05-2024 5 1   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

In this study, ZnO NPs were synthesized as the carrier transporting layer using a solution-mediated process. After that, all solution-multilayer QD-LEDs with a structure of ITO-Glass/PEDOT:PSS/PVK/Green-QDs/ZnO/Al/Encap was fabricated.

10p viohoyo 25-04-2024 3 2   Download

Ebook "Polyoxomolybdates as green catalysts for aerobic oxidation" describes the importance of the selective oxidation of alcohols and advantages of heterogeneous catalysts over conventional catalysts, use of environmentally benign oxidants, and the design of selective catalysts by tailoring of polyoxometalates at the molecular level. Chapter 2 describes synthesis, characterization 11-molybdophosphate based supported materials and their use as heterogeneous catalysts for oxidation of alcohols with molecular oxygen under solvent free mild reaction condition.

63p tudohanhtau1006 29-03-2024 2 1   Download

Ebook "Essential oils as reagents in green chemistry" provides a valuable reference for the contribution of essential oils in the green chemistry, mainly in terms of their characteristics corresponding to their compositions, the development of their extraction technologies including both conventional and green process (e.g. microwave, ultrasound), and their sustainable applications as antioxidants, antimicrobials, insecticides, green solvents and synthons for the green synthesis.

78p tudohanhtau1006 29-03-2024 8 1   Download

Ebook "Modern techniques and solvents for the extraction of microbial oils" has been done as part of ProBio3 project financed by Agence National de la Recherche (France) to achieve scientific and technological challenges to boost the sustainable microbial production of lipids as biojet fuel and fine chemical compounds. Authors are totally convinced that this book is the starting point for future collaborations and innovations in a new area of “green chemistry” of “natural products” between research, industry, and education.

61p tudohanhtau1006 29-03-2024 1 1   Download

These reactions involved a condensation reaction of aromatic benzaldehydes, 5,5-dimethyl-1,3-cyclohexanedione, and dicyanomethane in a solvent mixture of ethanol and water, resulting in the desired products in moderate to good yields. The procedure is efficient and eco-friendly, and the products can be easily obtained by recrystallisation. Thus, this protocol offers an alternative to existing methods.

12p viellison 28-03-2024 5 1   Download

This study was conducted to determine the solvent and additives to obtain high bioactive compounds from Daklak Vietnam Robusta GCB to evaluate extraction methods, the properties (emulsion formation, particle, stability) and testing the antioxidant, antibiotic and cytotoxicity of the nanoemulsions of Robusta GCB extract.

7p viellison 28-03-2024 3 1   Download

Ebook "Green approaches to asymmetric catalytic synthesis" summarizes the impressive amount of research that has been gathered within this field into three chapters focusing on: i) the search of alternative catalysts, ii) alternative solvents, and iii) alternative synthetic strategies and processes. For each topic, the fundamentals and some valuable applications are discussed.

150p manmanthanhla0201 26-02-2024 1 1   Download

Ebook "Green solvents I: Properties and applications in chemistry" provides a throughout overview of the different types of solvents and discusses their extensive applications in fields such as extraction, organic synthesis, biocatalytic processes, production of fine chemicals, removal of hydrogen sulphide, biochemical transformations, composite material, energy storage devices and polymers.

440p nhanphanguyet 28-01-2024 4 2   Download

Ebook "Green solvents II: Properties and applications of ionic liquids" provides a throughout overview of the different types of solvents and discusses their extensive applications in fields such as extraction, organic synthesis, biocatalytic processes, production of fine chemicals, removal of hydrogen sulphide, biochemical transformations, composite material, energy storage devices and polymers. These volumes are written by leading international experts and cover all possible aspects of green solvents’ properties and applications available in today’s literature.

518p nhanphanguyet 28-01-2024 5 2   Download

Ebook "Alternative solvents for natural products extraction" presents the current state-of-the-art in alternative and green solvents used for laboratory and industrial natural product extraction in terms of the latest innovations, original methods and safe products. Addresses the opportunities and challenges in a single resource that provides practical information on the use of a wide variety of alternative solvents for extraction strategies in laboratory and industrial natural product extraction.

323p nhanphanguyet 28-01-2024 2 2   Download

Ebook "Green chromatographic techniques: Separation and purification of organic and inorganic analytes" presents a unified outlook on counter-current, ion size exclusion, supercritical fluids, high-performance thin layers, and gas and size exclusion chromatographic techniques used for the separation and purification of organic and inorganic analytes. It also describes a number of green techniques, green sample preparation methods and optimization of solvent consumption in the chromatographic analysis of organic and inorganic analytes.

220p nhanphanguyet 28-01-2024 3 2   Download

Starch is a polysaccharide widely present in nature and characterized by a wide range of applications. This often implies the necessity for various novel properties with respect to those of native starch, mainly achievable via chemical modification.

19p viginny 30-12-2022 12 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

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 10 3   Download

We report here the improvement of a procedure to obtain global models, able to describe the retention behaviour of several sample components simultaneously. The reported global models include parameters that account for the general effects of column and solvent on retention and are common for all components, whereas other parameters are specific of each sample component.

13p viginny 23-12-2022 11 3   Download

The isomerization of α-pinene – a renewable bioresource – was investigated as a relatively simple method for the syntheses of camphene and limonene, industrially important products. The catalytic activity of H2SO4-modified clinoptilolite was evaluated without any solvent and the results show its applicability as a novel, green, reusable and promising catalyst in organic syntheses.

14p vironald 15-12-2022 7 2   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

This study primarily investigated the possibility of extracting pectin from orange peels using water as a green solvent. The pectin powder was characterized. The results show that the extracted pectin had acceptable moisture content (8,21%) and high purity with the total anhydrouronic acid content of 82,7%.

4p vimelindagates 18-07-2022 10 2   Download