Monday, December 30, 2019
Organic Solvents A New Approach For Organic Synthesis
ââ¬Å"ON WATERâ⬠REACTIONS: A NEW APPROACH FOR ORGANIC SYNTHESIS Technically, water is considered as the universal solvent in Nature. However, the prevalent notion among todayââ¬â¢s chemists is that water is often forgotten in organic synthesis; many considerations are taken in the process of selecting solvents, reagents, and conditions which are water-free. In addition to the obvious problem that concerns about the surrounding water-sensitive reactants, the main problem is solubility which is the requirement for reactions to occur, and it is a justification for the use of many organic solvents at the exclusion of anything else in organic synthesis. Nevertheless, many living biochemical reactions mostly happen in an aqueous medium. The concern about environment and safety is another reason that has flamed up the interest in Green Chemistry, which prompted more researches into alternatives to traditional organic solvents. Therefore, water is a very promising candidate for the future choice of solvent as it is cheap, reusable, nonvolatile and saf e to handling of exothermic or heat-releasing reactions. Even though water has many advantages in organic synthesis, the low solubility of organics reagents has prevented the expanding utilization of water as a standard solvent. In the past, water was not quite a common choice in the process of organic synthesis. However, one of the earliest experiments that took advantages of water as solvent was Wohlerââ¬â¢s urea synthesis in 1828, as well asShow MoreRelatedThe Effect Of Nanometer Sized Molecules On The Scale Of Nanometer1615 Words à |à 7 Pages Introduction The advancement in technology has resulted in new and intriguing applications for the materials that in the past were considered inconceivable. This is evidenced in the rapidly emerging nanotechnology field. 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There exist a number of methods to synthesize the nanomaterials, which are categorized in two techniques ââ¬Å"top down and bottom upâ⬠. Solid state route, ball millingRead MoreApplication Of Magnetic Polymer Nanocomposites1720 Words à |à 7 Pagesbiocompatible, and can be remotely heated by alternating magnetic fields. The magnetic induction heating behavior provides a great benefit in biomedical applications, such as targeted drug delivery, and magnetic separation. In situ formation of an organic or polymer layer on their surface is one of the efficient methods for decreasing the aggregation between the nanoparticles, as well as providing functionality on the surface and allowing further functionalization with drugs and therapeutic agentsRead MoreEnergy Consumption Spectrum And Its Impact On The Global Warming Issue2909 Words à |à 12 Pagesaverage global temperature increase, compared with pre-industrial levels, must be held below 2 â °C, by reducing the greenhouse gas emissions (ref). 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