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Copillar[5]arene Appended Pyrene Schiff Base: Photophysics, Aggregation Induced Emission and Picric Acid Recognition.
Chem Asian J
January 2025
University of Kalyani, Chemistry, Kalyani, 741235, Kalyani, INDIA.
Herein, we report the synthesis of copillar[5]arene-based pyrene Schiff base 1 and its characterization by using 1H, 13C NMR, FT-IR and mass spectrometry. UV-vis absorption, steady-state fluorescence and time-resolved fluorescence are done to elucidate the photophysical behaviors of 1. To understand the electronic structure of 1, density functional theory (DFT) calculations are performed.
View Article and Find Full Text PDFConstitutive chemical defense mechanism of inner bark of Sorbus commixta against Trametes versicolor.
Tree Physiol
January 2025
Research Faculty of Agriculture, Hokkaido University, Sapporo, 060-8589, Japan.
Tree bark is a crucial tissue that defends tree stems from invasions by microorganisms. However, our understanding of the constitutive chemical defense mechanisms of the tree barks remains limited. Our group recently discovered that the inner bark of Sorbus commixta exhibited potent inhibitory effects on the growth of the white-rot fungus, Trametes versicolor.
View Article and Find Full Text PDFThe substituent effect on the heat-induced pyrolysis mechanism of energetic materials: a case of reactive molecular dynamics simulations on nitrobenzene compounds.
Phys Chem Chem Phys
January 2025
School of Environment and Safety Engineering, North University of China, Taiyuan, 030051, China.
The initial decomposition reactions of 1,3,5-trinitrobenzene (TNB), picric acid (PA), 2,4,6-trinitrotoluene (TNT), 2,4,6-trinitroaniline (TNA) and 2,4,6-trinitrophenylmethylnitramine (Tetryl) were studied using ReaxFF-lg molecular dynamics simulations, and the substituent effect on the thermal decomposition behaviours of nitrobenzene compounds was evaluated through the reactant number, initial decomposition pathway, products and cluster analysis. The results show that the introduction of substituents could promote the decomposition of the reactants, increase the frequency of the nitro-nitrito isomerization reaction and intermolecular H or O atom transfer reaction, and reduce the frequency of the direct nitro dissociation reaction. Notably, these effects were most obvious in the case of TNT.
View Article and Find Full Text PDFSERS of nitro group compounds for sensing of explosives.
RSC Adv
January 2025
V. Ye. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine 41 Nauky Avenue 03028 Kyiv Ukraine
Detecting small concentrations of nitro-compounds surface-enhanced Raman spectroscopy (SERS) is reported. In particular, explosive analogues, such as 4-nitrophenol, 1-nitronaphthalene, and 5-nitroisoquinoline, and an explosive material (picric acid) are investigated and prepared by measurements using two different methods. One method involved mixing the analyte with plasmonic silver nanoparticles (Ag NPs) in a solution, followed by subsequent drop-casting of the mixture onto a silicon substrate.
View Article and Find Full Text PDFDevelopment of a novel and robust CuO-CoO@Biochar nanocomposite using Terminalia chebula leaf extract for reduction of nitro compounds and photodegradation of single and binary mixture of organic contaminants.
Environ Sci Pollut Res Int
January 2025
Department of Chemistry, National Institute of Technology, Silchar, 788010, Assam, India.
In this work, Terminalia chebula leaf extract was used to synthesize CuO-CoO nanoparticles, which were then embedded in a rice straw biochar. This new biochar-based nano-catalyst is used to photocatalytically degrade a variety of dyes (Eosin Y, Trypan Blue, Crystal Violet, Methylene Blue, Brilliant Green), as well as a binary mixture of Eosin Y and Trypan Blue dyes. It is also used for the catalytic reduction of nitro compounds (4-NP, 3-NP, and Picric acid).
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