In this work, we present the synthesis of an alternative precursor for chemical vapour deposition of parylene AF-4 to the widely used standard, octafluoro[2.2]paracyclophane. The standard precursor suffers from uncertainties in its supply chain and its synthesis is of low yield. A comparison between different reaction parameters and solvents is drawn by means of thermal, laboratory-scale and microwave-assisted reactions and quantitative nuclear magnetic resonance (qNMR) studies.
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http://dx.doi.org/10.1098/rsos.201921 | DOI Listing |
Prep Biochem Biotechnol
January 2025
College of Chemical Engineering, Shijiazhuang University, Shijiazhuang, Hebei Province, China.
Doramectin, a 16-membered macrocyclic lactone that is widely used in the treatment of mammalian parasitic diseases. Doramectin was produced by mutant using cyclohexanecarboxylic acid as a precursor. As a semi-synthetic insecticidal agent produced, the production of doramectin was low, which could not be satisfy the demands of industrial fermentation.
View Article and Find Full Text PDFOrg Lett
January 2025
School of Chemistry, Chemical Engineering, and Biotechnology, Nanyang Technological University, Singapore 637371, Singapore.
Synthetic C-glycosides play a crucial role in molecular biology and medicine. With the surge of interest in C-glycosides and the demand to provide efforts with sufficient feedstock, it is highly significant to pursue novel methodologies to access C-glycosides in a concise and efficient manner. Here, we disclose an attractive strategy that diverges itself from conventional multistep reaction sequences involving the manipulations of protecting groups.
View Article and Find Full Text PDFJ Chem Phys
January 2025
College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, People's Republic of China.
The electrochemical property of Mo2C nanoparticles (NPs) depends on the structure and crystal planes. Herein, Mo2C nanoparticles were prepared and dispersed on carbon nanosheets by the construction of a biomass-derived carbon precursor, and the exposed dual crystal planes were also controlled by optimal conditions. The structure, compositions, and morphology of the carbon-based Mo2C were characterized, and the Mo2C NPs were well dispersed on the carbon nanosheets.
View Article and Find Full Text PDFPhys Chem Chem Phys
January 2025
Université de Lorraine, CNRS, LRGP, F-54000 Nancy, France.
Stereochemistry plays a key role in both fundamental chemical processes and the dynamics of a large set of molecular systems of importance in chemistry, medicine and biology. Predicting the chemical transformations of organic precursors in such environments requires detailed kinetic models based on laboratory data. Reactive intermediates play a critical role in constraining the models but their identification and especially their quantification remain challenging.
View Article and Find Full Text PDFNanoscale
January 2025
Department of Chemical Engineering, Texas Tech University, Lubbock, TX 79409, USA.
Additive manufacturing (AM) of magnetic materials has recently attracted increasing interest for various applications but is often limited by the high cost and supply chain risks of rare-earth-element (REE) magnetic precursors. Recent advances in nanomanufacturing have enabled the development of rare-earth-free (REF) magnetic materials, such as spinel ferrites, hexaferrites, MnAl, MnBi, Alnico, FePt, and iron oxides/nitrides, which offer promising alternatives for printing high-performance magnetic devices. This review provides a detailed overview of the latest developments in REF magnetic materials, covering both synthesis strategies of REF magnetic materials/nanomaterials and their integration into AM processes.
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