نتایج جستجو برای: mechanochemical synthesis
تعداد نتایج: 410962 فیلتر نتایج به سال:
Ball-milling and pestle and mortar grinding have emerged as powerful methods for the development of environmentally benign chemical transformations. Recently, the use of these mechanochemical techniques in asymmetric organocatalysis has increased. This review highlights the progress in asymmetric organocatalytic reactions assisted by mechanochemical techniques.
This paper described the mechanochemical (solvent free) synthesis and structural analysis of stable copper (II) glutathione complexes. The bluish green copper (II) glutathione complexes were synthesized in mole ratios of 1:2 and 1:4 [(M: L) Metal: Ligand]. Infrared spectroscopy confirmed that copper (II) binding occurred via -SH of thiol. Microanalysis data agrees with the ML in case of 1:2 and...
• The surface plays an important role in oligomerization of ?-pinene by providing reactive oxygen sites. Shear stress is the key driver mechanochemical reactions. can activate multiple reaction pathways that are not accessible thermally. induces physical deformation reacting species to make them more reactive. Mechanochemical reactions play a critical many manufacturing, tribological, and synth...
A series of isoniazid derivatives bearing a phenolic or heteroaromatic coupled frame were obtained by mechanochemical means. Their pH stability and their structural (conformer/isomer) analysis were checked. The activity of prepared derivatives against Mycobacterium tuberculosis cell growth was evaluated. Some compounds such as phenolic hydrazine 1a and almost all heteroaromatic ones, especially...
OBJECTIVE Endovenous techniques are, at present, the recommended choice for truncal vein treatment. However, the thermal techniques require tumescent anaesthesia, which can be uncomfortable during administration. Non-tumescent, non-thermal techniques would, therefore, have potential benefits. This randomised controlled trial is being carried out to compare the degree of pain that patients exper...
5-hydroxymethylfurfural (HMF), as one of the top ten important platform chemicals, can be used to produce 2,5-furandicarboxylic acid (FDCA), 2,5-dimethyl furan (DMF), levulinic acid, and other chemicals. An environmentally friendly system for synthesis sulfonated carbon materials from discarded masks has been proposed. A series mask-based solid catalysts (bMC-SO3H) were prepared by a simple two...
In this work, a mechanochemical procedure is proposed as a simple and fast method to synthesize pure BiFeO3 perovskite phase as a nanostructured material without the need for purification treatments, while the mechanochemical reaction mechanism has been investigated and correlated with that of the conventional solid-state reaction. Thus, different milling conditions have been used as a tool for...
ortho- and para-Phenylenediamines were desymmetrised and quantitatively transformed into mono- and bis-(thio)ureas or mixed thiourea-ureas through a one-pot mechanochemical click reaction sequence; mechanochemical desymmetrisation proceeds quantitatively without excess reagents and allows the controlled extension of a molecular structure by combining normally competing reactions.
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