Có 13+ tài liệu thuộc chủ đề "Schiff base"
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The method for the synthesis of the carbazole Schiff base was based on the condensation of carbazole-3-carbaldehyde with 4-nitro-o- phenyldiamine in dimethylformamide in a moderate yield. The structure of the final compound was characterized by 1 H NMR, 13 C NMR, IR, mass spectrometry, and single crystal X-ray diffraction. The final compound exhibited exceptional selective and sensitive turn-on fluorescence response...
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Thermolytic synthesis of cobalt and cobalt sulfide nanoparticles using Cobalt(II) N ∧ O Schiff base complexes as single molecular precursors. Abstract: Two novel N ∧ O-type Schiff base ligands and the corresponding Co(II) complexes are reported. The significant difference in the thermal decomposition profiles is recognized as an influence of structural differences on the complexes. Thus, the complexes were thermally...
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doi:10.3906/kim-1905-60 Research Article. Abstract: In this study, a series of cyclotriphosphazene derivatives containing a Schiff base (3a–3d) were synthesized by the reactions of hexachlorocyclotriphosphazene (1) with bis-aryl Schiff bases (2a–2d) having different terminal groups (H, F, Cl, and Br). The products (3a–3d) were characterized by elemental and mass analyses, FT-IR, and 1 H, 13 C, and. The thermal behaviors and...
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doi:10.3906/kim-1912-36 h t t p. Abstract: Two newly synthesized Schiff bases DMCA and DMBA were used for selective detection of Cd 2+ over a wide range of other metal ions in acetonitrile (ACN)/ Tris-HCl buffer (10 mM, pH 7.32, v/v 2:1). Response of the probes towards metal ions was investigated by using UV-vis spectroscopy. As one of the highly toxic...
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By replacing the substituents attached to the benzothiophene ring, some of the FDA-approved anticancer drugs such as arzoxifene and raloxifene were also developed [8,9]. Poor nutrition lack of sanitation weakened immune system and poverty facilitate spread of the disease in underdeveloped and developing countries. Moreover, molecular docking study for one of the most active compounds as antibacterial agent was performed...
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Synthesis, biological evaluation of antioxidant-antibacterial activities and computational studies of novel anthracene- and pyrene-based Schiff base. Abstract: Schiff base derivatives with anthracene- and pyrene-based units, A1-A6 and P1-P6 were synthesized (89%–99% yields). Schiff base derivatives were designed to possess an heterocyclic moiety on one side to enhance the coordination ability towards metals. To investigate the biological assay of the newly...
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Syntheses of Mannich bases 6a–c were carried out by the treatment of compound 2 with several amines in the presence of formaldehyde. It is well known that one of the main aims of therapeutic treatment is the control of serious infections, along with the prevention and treatment of some infectious complications due to other therapeutic procedures such as cancer chemotherapy...
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A new anthracene derivative of calix[4]arene as a fluorescent chemosensor. quenching of the anthracene derivative of calix[4]arene.. 6 The determination of Ca 2+ in various biological systems has attracted much interest and many efficient systems are continually being developed. 7,8 The sensitive and convenient determination of calcium ions, such as naked eye detection, 9,10 is essential for the convenient monitoring...
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These mononuclear Mn(II), Co(II), Ni(II), Cu(II), and Zn(II) complexes of the ligand were prepared and their structures were proposed by elemental analysis, and infrared and ultraviolet-visible spectroscopy. the proton NMR spectrum of the mbH ligand was also recorded. The azo-azomethine ligand, mbH, behaves as a bidentate ligand coordinating through the nitrogen atom of the azomethine (–CH=N–) and the oxygen atom...
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Synthesis, spectral characterisation, electrochemical, and fluorescence studies of biologically active novel Schiff base complexes derived from E-4-(2-hydroxy-3-. Abstract: A new Schiff base was prepared from 2-sulphanilamidopyrimidine and 2-hydroxy-3-methoxybenzaldehyde in ethanolic media and it was complexed with Mn(II), Co(II), Ni(II), Cu(II), and Zn(II) ions. The synthesised ligand and complexes were characterised by IR, UV, 1 H and 13 C NMR, elemental...
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These catalysts showed high efficiency for phosphine-free Mizoroki–Heck and Suzuki–Miyaura cross-coupling reactions with good diversity and generality. C–C bond formation is one of the most commonly employed chemical transformations generally used in both academic 1 and industrial chemistry. 5,6 Although homogeneous palladium complexes as conventional catalysts in cross- coupling reactions have shown high reaction rates, suitable turnover numbers, and sometimes...
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Highly selective Schiff base derivatives for colorimetric detection of Al 3+. Abstract: Schiff base derivatives NBAR and NSAR were developed for selective detection of Al 3+ in aqueous solution.. UV-vis spectroscopic studies revealed that NBAR and NSAR showed marked sensitivity and selectivity to Al 3+ in acetonitrile (ACN)/water (v/v, 1:1, pH 6.80). The NBAR and NSAR receptors bound Al 3+...
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Synthesis, characterization, and antimicrobial activities of novel monosaccharide-containing Schiff base ligands. Abstract: Four new chiral Schiff base ligands (3a–4a, 3b–4b) have been prepared using aminoisopropylidene derivatives of glucose and aminochloralose derivatives of mannose. A total of eight Schiff base compounds (3a–6a, 3b–6b) were tested for antimicrobial activity against Escherichia coli ATCC 12228, Staphylococcus aureus ATCC 6538, Klebsiella pneumoniae CCM 2318,...