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Showing 1 to 18 of 18 for “"triazines"”.
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Mesomorphic Dyes based on Conformationally Flexible 1,3,5-Triazines
… development of mesomorphic dyes based on 1,3,5-triazines. The thesis begins with structures possessing a more conventional liquid crystal design (e.g. symmetric disk-shaped molecules with six or more side- chains) and progresses towards the synthesis of liquid crystals with little to no …
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Design, synthesis and fluorescent characterisation of 2,5-dihydro-1,2,3-triazines
… of organic fluorophores; the 2,5-dihydro-1,2,3-triazines. A series of fluorescent 2,5-dihydro-1,2,3-triazines were synthesized via an interesting Huisgen 1,3-dipolar cycloaddition between 2,4,5-triphenyl-1,2,3-triazolium-1-arylaminide 1,3-dipoles and terminal alkyne propiolates. The initial …
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Effect of Certain Triazines Upon RNA and Protein Synthesis in Kidney Beans
No abstract prepared.
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Designing novel host materials for blue phosphorescent organic light-emitting diodes
… triazine core. The second generation consists of triazines with diarylamino substituents. The third generation compounds are a combination of disubtituted triazines from the first two generations and a phenoxy-carbazole unit. While the first and second generation comprise substituents that are …
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Synthesis, Characterization and Corrosion Inhibition Investigation of substituted triazines on aluminium and mild steel in 1M HCl: Experimental and Theoretical approach
… study investigates the synthesized substituted triazines, namely 4,6-dichloro-2-morpholine-1,3,5-triazine (DMT), 4.6-dichloro-2-anilino-1,3,5-triazine (DPT), and 4,6-dichloro-N-methylanilino-1,3,5-triazine (DNT) as corrosion inhibitor on aluminium (Al) and mild steel (MS) in 1M hydrochloric acid …
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The preparation of heterocycles by [2+2+2] cyclization and inverse electron demand Dels-Alder reactions of arynes with 1,2,4-triazines
… (IEDDA) reactions of arynes and 1,2,4-triazines were also investigated for the generation of isoquinoline core structures. The results showed that only triazines with electron withdrawing groups participated in the IEDDA reactions with benzyne as a partner after screening of several …
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Part 1. the mesomorphic properties of arloxy-s-triazines and their analogs, Part 2. the synthesis and polymerization behavior of α-aminonitriles and related compounds
… synthesizing a series of three-armed aryloxy-s-triazines with aromatic Schiff's base moieties at the molecular periphery and investigate the thermal and optical behavior of these compounds. We discovered that these molecules were in fact rigid rod, or calamitic, liquid crystals based on the …
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Synthesis of Novel -1, 3, 5 - Triazine - Based - Anti-Tuberculosis Drugs.
… protocols have been developed using 1,3,5-triazines due to the important biological properties which they display. The chemistry and an extensive spectrum of biological activities of s-triazines have been examined since several decades and this heterocyclic core has received emerging …
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Modified Purines. Rearrangement Through 5-Substituted Purine Intermediates
… this synthetic approach to imidazo{1,5-a}-1,3,5-triazines with variation in substitution at C(2), C(5), and the C(5)-amide group of the 4,5-dihydropyrimidin-4-one precursors 2 (see numbering system in 2). The possibility of successful preparation of imidazo{1,5-a}-1,3,5-triazine products with …
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Inhibitor-Quinone Interactions in Reaction Centers From Rhodopseudomonas Sphaeroides (Herbicide, Triazine, Ubiquinone, Photosynthesis, Resistance)
… inhibitors of Q(,A)('-) oxidation, including s-triazines and benzonitriles which, in plants, are potent herbicides. These herbicides were shown to act as competitive inhibitors of Q(,B)-binding, by kinetic methods and by direct binding of ('14)C-labelled herbicide. The inhibitors were found to …
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Water Quality Impacts from Agricultural Land-Use in the Karst Groundwater Basin of Qingmuguan, Chongqing, China
… the pesticides glyphosate, chlorothalonil, and triazines in the input and the output of the system was supported by the results. When considering the hydrology and water chemistry data of the site, along with the water samples tested for pesticides, non-parametric statistical testing showed the …
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Relationships between polymer additive molecular structure and intumescent flame retardant behaviour.
… with a high nitrogen content in the form of s-triazines. The most promising was the trimethylolmelamine salt of a bis-PEPA derivative of phosphoric acid, which, on testing, proved to be more effective than the current "state of the art" intumescent additive. Metal salts of acidic …
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Identification and Screening of Biomarkers of Human Exposure to Environmental and Food Toxicants in Sewage
… the population exposure to organophosphates, triazines and pyrethroids. A specific analytical method based on liquid chromatography tandem mass spectrometry was developed and validated to measure human urinary metabolites of pesticides in influent wastewater. This method was applied to samples …
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Electron Transfer in the Reaction Center From Rhodopseudomonas Viridis (Photosynthesis, Bioenergetics, Bacteria)
… suggesting that the inhibitors (e.g. s-triazines) mimic the quinone rather than the semiquinone. The kinetics of charge recombination between the photooxidized primary donor, P('+), and the photoreduced quinone acceptors were measured. The temperature dependence of the P('+) Q(,A)('-) …
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Addition of carbonyl fluoride to organic and inorganic nitriles
… aryltrifluoromethanes and 2-hydroxy-4,6-diaryl-s-triazines. Alkali metal fluorides also enhanced this reaction and suppressed the formation of 2,4,6-triaryl-s-triazine. Hith an electron withdrawing substituent on the aromatic ring, the reactions did not yield any significant quantity of the …
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Chemie polynitrovaných heterocyklických sloučenin
Byla zpracována rešerše na téma polynitrované heterocyklické sloučeniny. Jedná se o sloučeniny se schopností detonace, způsobené zejména přítomností nitroskupin, které jsou navázány na atomy uhlíku jejich cyklu. Tato práce se zabývá nejznámějšími zástupci jednotlivých skupin tohoto typu látek od …