Spectral and magnetic properties of phenylazo-6-aminouracil complexes

Masoud, Mamdouh S.; El-Enein, Saeyda A. Abou; Ayad, Mohamed E.; Goher, A.S.

doi:10.1016/s1386-1425(03)00226-9

Cited by 67 publications

(23 citation statements)

References 40 publications

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“…In addition, some azo dyes were the most widely used in various fields, such as high-technological systems, the coloring of different materials, colored plastics and polymers, biological-medical studies and advanced organic synthesis [12][13][14][15][16][17][18][19][20]. Synthesis and properties of some azopyrimidines and their complexes were described in several publications [21][22][23][24]. In our study, we focused on the synthesis of phenylazo-6-aminouracil derivatives (1-17), and the investigation of the spectral properties of these prepared dyes.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and spectroscopic properties of some new phenylazo-6-aminouracil

Seferoğlu

Ertan

2008

Open Chemistry

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Abstract:In this study, a series of new 5-phenylazo-6-aminouracil dyes were prepared by linking m-,p-nitroaniline, m-,p-chloroaniline, m-,p-anisidine, m-,p-toluidine, m-,p-cyanoaniline, p-ethoxyaniline, p-phenoxyaniline, p-ethylaniline, p-acetamidoaniline, p-acetylaniline, p-carboxyaniline and aniline to 6-aminouracil. The prepared dyes were characterized by UV-vis, FT-IR, 1 H NMR spectroscopic techniques and elemental analysis. The effect of acid and base upon the UV-vis spectra of these dyes were investigated. In addition, the solvatochromic behaviors and substituent effects in various solvents were evaluated. © Versita Warsaw and Springer-Verlag Berlin Heidelberg.

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Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and spectroscopic properties of some new phenylazo-6-aminouracil

Seferoğlu

Ertan

2008

Open Chemistry

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“…This signifies bonding of -NH 2 group of the ligands to the metal. The occurrence of a broad band in the same region 3440-3455 cm À1 in all the complexes is due to ν(OH) of water molecules (antisymmetric and asymmetric O-H stretching modes) [44]. The ν(C=O) band appears in Bh and Inh ligands at 1660 and 1667 cm À1 , respectively.…”

Section: Ir Spectramentioning

confidence: 86%

Synthesis, spectral and thermal studies of some polymeric mixed ligand uracil–hydrazide complexes with transition metal ions

Singh

Tiwari

Mishra

2012

Designed Monomers and Polymers

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“…The electrolytic conductors have a transfer of material associated with the passage of an electric current in the solution. In this field, Masoud et al [3][4][5][6][7][8][9][10] published a series of papers. The aim of this work to join all of the above parameters for the former ligands when associated with some metals to form complexes at different temperatures.…”

Section: Introductionmentioning

confidence: 99%

Dielectric and electric conductivity studies of some pyrimidine compounds and their complexes

Masoud¹,

Ramadan²,

El-Samahy³

et al. 2017

Adv Mater Sci

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The values of the dielectric constant (ε), the loss tangent (tan ) and the electrical conductivity (σ) for solutions of ligands barbituric acid(BA),5-nitrobarbituric acid(NBA) in 50%(v/v) MeOH-water also the ligands phenobarbital(PB) and thiouracil(TU) in 50%(v/v) dioxane -water, all at 25°C, in most cases, are decreased by decreasing the concentration. The ln ε-T relationship for solutions of ligands and their complexes pointed to an increase of dielectric constant values with temperature. The presence of hydrogen bonding referred to cooperative reinforcement of dipole fields. NBA has a higher dielectric constant value than BA due to the presence of the electron withdrawing nitro group with large orientational polarization. PB has a lower dielectric constant value than TU since ε decreases as the steric hindrance effect increases. For the complexes, the dielectric constant (ε) values, are higher than that for the ligands. As the atomic number of the metal increases, the dielectric constant (ε) and the loss tangent (tan δ) are mostly decreased to block the charge distribution. The derived values of electrical conductivity that derived from ὲ and tan δ data are regularly decreased and the activation energy (∆E) of the complexes decreased in an irregular trend. The loss tangent (tan δ) increases by increasing the temperature due to a decrease in viscosity, which exerts an increase of the dipole rotation and the polarization of the material. The molar conductance Λ m for the electrolytic solutions of BA, NBA, PB and TU at 25°C are increased by decreasing the concentration. The BA, PB and TU ligands are of weak electrolytic nature, while NBA is of strong electrolytic behavior. However, the Λ m values for solutions of ligands and their complexes are increased by increasing both temperature and dielectric constant due to the increase of the ionic mobility.

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Spectral and magnetic properties of phenylazo-6-aminouracil complexes

Cited by 67 publications

References 40 publications

Synthesis, characterization and spectroscopic properties of some new phenylazo-6-aminouracil

Synthesis, characterization and spectroscopic properties of some new phenylazo-6-aminouracil

Synthesis, spectral and thermal studies of some polymeric mixed ligand uracil–hydrazide complexes with transition metal ions

Dielectric and electric conductivity studies of some pyrimidine compounds and their complexes

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