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Relevant bibliographies by topics / Azo-dye synthesis

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Journal articles

Academic literature on the topic 'Azo-dye synthesis'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Azo-dye synthesis"

1

Mestry, Siddhesh Umesh, Umesh Ratan Mahajan, Aswathy M., and Shashank T. Mhaske. "Development of novel pH-sensitive azo dyes from Cardanol as a bioresource." Pigment & Resin Technology 50, no. 3 (2021): 231–40. http://dx.doi.org/10.1108/prt-03-2020-0026.

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Purpose The purpose of this paper is to use the bio-based resource as the starting material for the synthesis of azo dye. Cardanol is one of the most used bio-based resources for carrying out the synthesis of various compounds having numerous end applications. The study presents an attempt to develop an azo dye from Cardanol having end applications in pH-responsive dyes. Design/methodology/approach The cardanol was sulfonated to block the para position by which ortho positioned hydroxyl group after diazotization and coupling will provide necessary pH-sensitivity. The diazotization of two napht

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2

Akwi, Faith M., and Paul Watts. "The in situ generation and reactive quench of diazonium compounds in the synthesis of azo compounds in microreactors." Beilstein Journal of Organic Chemistry 12 (September 6, 2016): 1987–2004. http://dx.doi.org/10.3762/bjoc.12.186.

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In this paper, a micro-fluidic optimized process for the continuous flow synthesis of azo compounds is presented. The continuous flow synthesis of Sudan II azo dye was used as a model reaction for the study. At found optimal azo coupling reaction temperature and pH an investigation of the optimum flow rates of the reactants for the diazotization and azo coupling reactions in Little Things Factory-MS microreactors was performed. A conversion of 98% was achieved in approximately 2.4 minutes and a small library of azo compounds was thus generated under these reaction conditions from couplers with

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3

Rasheed, Omer, and Peter Quayle. "Azo Dyes: New Palladium- and Copper-Catalysed Coupling Reactions on an Old Template." Synthesis 50, no. 13 (2018): 2608–16. http://dx.doi.org/10.1055/s-0036-1591571.

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The elaboration of azo dyes using a variety of transition-metal-catalysed reactions (Stille, Heck, Ullmann, and Suzuki couplings) is reported. This methodology has been applied to the synthesis of functionalised coumarin azo dye conjugates, substrates which may find potential application in the development of new sensors.

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4

Abdullah, Eshraq Ahmed, Abdul Halim Abdullah, Zulkarnain Zainal, Mohd Zobir Hussein, and Tan Kar Ban. "Synthesis and Characterisation of Penta-Bismuth Hepta-Oxide Nitrate, Bi5O7NO3, as a New Adsorbent for Methyl Orange Removal from an Aqueous Solution." E-Journal of Chemistry 9, no. 4 (2012): 2429–38. http://dx.doi.org/10.1155/2012/707853.

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This paper presents the synthesis of penta-bismuth hepta-oxide nitrate, Bi5O7NO3, via the chemical precipitation method. After calcination, the precipitate was characterised by several methods, which included X-ray powder diffraction, X-ray photoelectron spectroscopy, scanning and transmission electron microscopy, Fourier transform infrared, thermogravimetric analysis, BET surface area and pH drift method to determine the pH of point of zero charge (pHpzc). The study results revealed that Bi5O7NO3had an orthorhombic crystal structure, a surface area of 1.6 m2 g-1 and a point of zero charge at

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5

Radulescu-Grad, Maria Elena, Gabriela Vlase, Gheorghe Ilia, Adelina Andelescu, Simona Popa, and Alfa-Xenia Lupea. "Amido Black 10B Dye Copper Complex�Synthesis, Characterization and Color Analysis." Revista de Chimie 71, no. 8 (2020): 27–38. http://dx.doi.org/10.37358/rc.20.8.8276.

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The present paper presents the obtaining and the characterization of a new complex acid dye by combining the transition metal Cu (II) with an azo acid dye, namely Amido Black 10B (C.I. 20.470), as ligand. The ligand and the resulted new azo complex were characterized by FT/IR spectroscopy, UV-Vis spectroscopy, AAs spectrometry, thermal analysis, and PXRD spectrometry. The structure of the ligand and the structure of the new synthesized copper complex were elucidated by all the above mentioned analysis methods. The formation of the azo metal complex with Cu(II) was confirmed by UV-Vis spectrum.

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6

Rasheed, O. K., J. J. W. McDouall, C. A. Muryn, J. Raftery, I. J. Vitorica-Yrezabal, and P. Quayle. "The assembly of “S3N”-ligands decorated with an azo-dye as potential sensors for heavy metal ions." Dalton Transactions 46, no. 16 (2017): 5229–39. http://dx.doi.org/10.1039/c7dt00569e.

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7

Mohammed, Hasan. "Synthesis, Identification, and Biological Study for Some Complexes of Azo Dye Having Theophylline." Scientific World Journal 2021 (July 21, 2021): 1–9. http://dx.doi.org/10.1155/2021/9943763.

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This article includes the synthesis of heterocyclic azo dye of theophylline by coupling diazonium salt of 4-chloroaniline with theophylline which is, namely, 8-(1-(4-chlorophenyl)azo)theophylline (CPAT). The complexes of cobalt and nickel were prepared by reacting their ions with CPAT ligand in ethanol under 1 : 2 ratio metal-ligand. The CPAT ligand and its complexes were characterized by elemental analysis, infrared spectrometry, electronic absorption spectroscopy, molar conductivity, and magnetic moment. The cobalt and nickel complexes show octahedral geometry having general formula [M(CPAT)

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8

Ushkarov, V. I., K. I. Kobrakov, A. I. Alafinov, S. A. Shevelev, and A. Kh Shakhnes. "Methylphloroglucinol as an available semiproduct for azo dye synthesis." Theoretical Foundations of Chemical Engineering 41, no. 5 (2007): 671–74. http://dx.doi.org/10.1134/s0040579507050375.

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9

Lai, Long-Li, and Hong-Cheu Lin. "Synthesis and mesogenic properties of azo-dye liquid crystals." Liquid Crystals 27, no. 5 (2000): 707–9. http://dx.doi.org/10.1080/026782900202606.

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10

Liu, Dan, Jun Long Liu, Da Peng Zhou, Hong Mei Wang, and Zheng Ling Zhu. "Synthesis and Spectral Properties of Polymeric Dye from Waste Plastic." Advanced Materials Research 535-537 (June 2012): 1520–24. http://dx.doi.org/10.4028/www.scientific.net/amr.535-537.1520.

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Using waste expanded polystyrene as the raw material, the azo polymeric dye (I-III) were prepared via nitration, reduction, diazotization and coupling reactions. The structures of the intermediate products and the polymeric dyes obtained were characterized by the FTIR spectra. By UV-Vis absorption spectrum measurements, the relationship among the maximum absorption wavelength, molecular structure and color of polymeric dye was investigated.

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