24304-84-5Relevant articles and documents
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Lotz et al.
, p. 541 (1959)
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Entrapment of a Pseudo-Tetrahedral CoII Center by Thioether Sulfur Bound {Co2(μ-L)} Fragments: Synthesis, Field-Induced Single-Ion Magnetism and Catechol Oxidase Mimicking Activity
Das, Manisha,Basak, Dipmalya,Trávní?ek, Zdeněk,Van?o, Ján,Ray, Debashis
, p. 3898 - 3914 (2019/11/11)
Simultaneous incorporation of both CoII and CoIII ions within a new thioether S-bearing phenol-based ligand system, H3L (2,6-bis-[{2-(2-hydroxyethylthio)ethylimino}methyl]-4-methylphenol) formed [Co5] aggregates [CoIICoIII 4L2(μ-OH)2(μ1,3-O2CCH3)2](ClO4)4?H2O (1) and [CoIICoIII 4L2(μ-OH)2(μ1,3-O2CC2H5)2](ClO4)4?H2O (2). The magnetic studies revealed axial zero-field splitting (ZFS) parameter, D/hc=?23.6 and ?24.3 cm?1, and E/D=0.03 and 0.00, respectively for 1 and 2. Dynamic magnetic data confirmed the complexes as SIMs with Ueff/kB=30 K (1) and 33 K (2), and τ0=9.1×10?8 s (1), and 4.3×10?8 s (2). The larger atomic radius of S compared to N gave rise to less variation in the distortion of tetrahedral geometry around central CoII centers, thus affecting the D and Ueff/kB values. Theoretical studies also support the experimental findings and reveal the origin of the anisotropy parameters. In solutions, both 1 and 2 which produce {CoIII 2(μ-L)} units, display solvent-dependent catechol oxidation behavior toward 3,5-di-tert-butylcatechol in air. The presence of an adjacent CoIII ion tends to assist the electron transfer from the substrate to the metal ion center, enhancing the catalytic oxidation rate.
Has high water washing fastness and bears the friction fastness reactive red dye and the preparation method
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Paragraph 0049; 0050; 0067, (2018/03/01)
The invention discloses a reactive red dye with high washing fastness and rubbing fastness and a preparation method of the reactive red dye. Acetanilide reacts with chlorosulfonic acid and sulfoxide chloride to generate acetylsulfanilyl chloride; acetylsulfanilyl chloride is condensed with a sulfide generate by reacting a 2-chlorethamin hydrochloride with mercaptoethanol to obtain thioether; the thioether is oxidized and esterified to obtain 2-[2-(4-aminobenzenesulfonamido) ethyl sulfuryl] hydroxyethyl sulfate which is primarily condensed with cyanuric chloride and secondarily condensed with H acid to obtain a condensation compound; the condensation compound is cooled and then coupled with the diazonium salt of 1.5 acid under an alkaline condition, and the product is filtered and then the filtrate is collected and is subjected to direct spray drying to obtain a semi-finished product. The reactive red dye has the characteristics of bright color, high solubility high substantivity, high compatibility, high lifting power, high fixation rate, excellent diversified fastness and the like. The reactive red dye is suitable for dyeing, printing and pad dyeing of cellulosic fibers, protein fibers, viscose and polyarmide fibers, and higher than common types in rubbing fastness and washing fastness by 0.5 to 1 level.