Synthesis, Characterization and Applications of Some Azo Dyes Derived from Various Aromatic Amines

Vidya, V.G.; Sadasivan, V.

doi:10.14233/ajchem.2018.21414

Cited by 14 publications

(3 citation statements)

References 15 publications

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“…2. The dye spectrum gives a collection of double and triple peaks that have a chemical shift (δ) within the range (7.08-8.49) ppm belonging to the eight protons of the aromatic rings, the single peak that has a chemical shift (δ) at site 12.24 ppm belonging to the proton of the OH group and the single peak that has a chemical shift (δ) at site 6.77 ppm belonging to the two protons of the NH2 group [17,18].…”

Section: Resultsmentioning

confidence: 99%

Synthesis, Characterization and Analytical Study of New Azo Dye

2022

Basrah Researches Sciences

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The azo dye ((E)-4-((4-aminophenyl) diazenyl) naphthalen-1-ol) was prepared by diazotization and coupling reaction with 1-naphthol. The azo dye was diagnosed by FT-IR, 1H-NMR, mass spectra and visible spectrometry. The acid and basic properties were studied by the visible absorption spectra of the dye at different pH values and appearance of a clear isobestic point and a high absorption peak at the maximum wavelength (595nm) which is due to the absorption of the negative formula of the dye in the basic medium and an absorption peak at the wavelength (477nm) that is due to the absorption of the proton formula of the dye in the acidic medium. The ionization and protonation constants were calculated and the extent of the indicator within pH (7.4 - 9.4). The effect of the solvents on the visible absorption spectra of the dye was studied, and a clear red shift of the dye spectra was observed in the polar solvents.

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Section: Resultsmentioning

confidence: 99%

Synthesis, Characterization and Analytical Study of New Azo Dye

2022

Basrah Researches Sciences

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“…33,34 Here axial ligands attached to central atom are not liberated on to the area of electrode during CV measurements and the reduction process has a reversible character. 35,36,37,38,39,40 The second harmonic generation performance of BNAP and its complexes had been determined. The performance of the sample was set side by side with microcrystalline powder of (potassium dihydrogen phosphate) KDP.…”

Section: H (Gauss) → Fig 5 Esr Spectrum Of [Cu(bnap)2(h2o)2]mentioning

confidence: 99%

Synthesis, spectroscopic characterization and biological activities of some metal complexes with new heterocyclic azodye ligand 2-(2-hydroxynaphthalen-1-yl azo)-pyridin-3-ol

Vidya¹,

Sadasivan²

2023

10.5267/j.ccl

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Metal complexes of [2-(2-hydroxynaphthalen-1-ylazo)-pyridin-3-ol] are derived from 2-amino-3-hydroxypyridine and β-naphthol was synthesized and characterized by thermal, spectral and analytical tools. The ligand was reacted with Mn(II), Fe(II), Co(II), Ni(II), Cu(II) and Zn(II) in 1:2 stoichiometry. The IR spectra confirms the azo ligand coordination to metal ions via azo nitrogen and phenolic oxygen of pyridine after deprotonation. Both IR and 1HNMR spectra recorded involvement of deprotonated hydroxyl groups with proton displacement. The magnified fluorescence was shown by Mn(II) and Ni(II) complexes. None of the prepared ligands or complexes show any NLO activity with KDP as standard. The DNA cleavage and anticancerous activities done. The influence of zinc chelates on cure characteristics of rubber compounds was estimated based on rheometer measurements. The ligand and metal complexes are tested in vitro against some bacteria and fungi species. The antioxidant activities, DNA cleavage and anticancerous activities done. Ligand and its complexes catalysed cleavage of DNA.

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“…Industrially, artificial dyes particularly, simple acid dyes and metal complexes are mostly utilized due to their relatively good fastness to light, low-production cost and wide variation of colours [70]. However, unlike natural dyes which are non-toxic, most of these synthetic dyes are carcinogenic and mutagenic and are thus, detrimental to both humans and the environment [68,71].…”

Section: Dyeingmentioning

confidence: 99%

An insight into artisanal leather making in Ghana

et al. 2020

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The production of leather from animal skins and hides through tanning processes began in the pre-historic ages. Despite the origination of new leather making techniques such as chrome tanning which is being employed extensively today, the traditional method of leather production primarily through vegetable tanning is still being practised mostly in artisanal tanneries in developing nations including Ghana. Artisanal leather making, thus, contributes beneficially to rural livelihood. Nevertheless, the growth of this sector has been stifled by the lack of innovative technologies to enhance productivity. This challenge could be partly linked to the knowledge gap on the scientific principles governing artisanal leather production processes. This study, therefore, elaborates on various process steps and materials employed in traditional leather making in Ghana and the scientific principles underlying each of the processes. It also makes a comparison between traditional and modern leather manufacturing processes and identifies knowledge and technological gaps which would inspire in-depth scientific research into artisanal leather making. Graphical abstract

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Synthesis, Characterization and Applications of Some Azo Dyes Derived from Various Aromatic Amines

Cited by 14 publications

References 15 publications

Synthesis, Characterization and Analytical Study of New Azo Dye

Synthesis, Characterization and Analytical Study of New Azo Dye

Synthesis, spectroscopic characterization and biological activities of some metal complexes with new heterocyclic azodye ligand 2-(2-hydroxynaphthalen-1-yl azo)-pyridin-3-ol

An insight into artisanal leather making in Ghana

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