The dyeing of cellulose with direct dyes. Part III.—The aqueous diffusion of direct dyes

Holmes, F. H.; Standing, H. A.

doi:10.1039/tf9454100542

Cited by 19 publications

(4 citation statements)

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“…The measurement of the diffusion coefficients were carried out using Anson-Northop type cell at 30 + 0.02 ~ The procedure has been described in detail by F. H. Holmes and H. A. Standing [2]. The cell constant was obtained by gauging at 25 ~ with 0.3 mol potassium chloride (diffusion coefficient = 1.839 x 10 -~ cm2/sec) [3].…”

Section: Methodsmentioning

confidence: 99%

Diffusion coefficients of anticancer drugs and compounds having a similar structure at 30 �C

Nishida¹,

Ando²,

Kawamura³

1983

Colloid & Polymer Sci

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The measurement of the diffusion coefficients of anticancer drugs and compounds having a similar structure in aqueous solution at 30 ~ are carried out and the effect of some groups affecting the diffusion coefficients is investigated. The measurements of viscosity are also carried out in order to obtain the viscosity coefficient. The radius of molecule from the diffusion coefficients is in agreement with the value from the viscosity measurements. Under the concentration range studied, it seem that these compounds have a same state, for example, monomer or dimer. However, from Van der Waals radius of the results obtained, these solutes are monomer state. In spite of a large size, the diffusion coefficient of Uridine-5'-monophosphoric acid indicates a high value because of the potential gradient occurs in diffusion. From the result, 5-fluoro-2'-deoxy-5'-monophosphoric acid diffuses quickly in human body in spite of the large molecular weight.

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Section: Methodsmentioning

confidence: 99%

Diffusion coefficients of anticancer drugs and compounds having a similar structure at 30 �C

Nishida¹,

Ando²,

Kawamura³

1983

Colloid & Polymer Sci

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“…Spectroscopic Measurements. The change in absorption spectra of pigments [3][4][5][6][7] in DMF as a function of concentration has also been determined to independently obtain the respective association constants. Solution spectra of 3-7 were determined using solutions of ca.…”

Section: Methodsmentioning

confidence: 99%

Electrochemical and spectroscopic studies of arylazo-2-naphthol metal complexes in dimethylformamide solution

Loutfy¹,

Sharp²

1977

J. Am. Chem. Soc.

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“…The results suggest that the dye molecules interact and tend to be aggregated [27]. The average of aggregation number N at different dye concentrations and at different temperatures was calculated using the method reported by Holmes and standing [28], the equation in the form:…”

Section: 5-aggregation Number Aggregation Constant and Shape Of Agmentioning

confidence: 99%

Study Interionic Attraction of anionic dyes by Electrolytic Conductivity Measurement

gomaa

2020

Al-Azhar Bulletin of Science

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Measurements of conductivity in aqueous solution are recommended for studying the behavior of some dyes. The conductivity of two azo dyes C.I. Acid Red 151 (AR 151) and C.I. Mordant green 17 (MG17) have been studied. The ionization degree, α and Van , t Hoff's factor ,i, were calculated. Their values decrease with increasing dye concentration and increase with increasing temperature. The mobility, µ, the activation energy, E, were also calculated. The findings indicate that interionic attractions and connections are present. Dye ions tend to selfassociate. Since these textile dyes were applied from aqueous systems, it is important to understand the association of dyes. The molecular aggregation of two sulphonated dyes studied by measuring the electrolytic conductivity in aqueous solutions as a function of dye concentration and temperature. Aggregation number, aggregation constant and shape of aggregate were calculated. As expected, the aggregation number decreases with increasing temperature, and that tends to J-aggregation which enhance the devices performance such as xerography, sensors, dye sensitized solar cells (DSSCs). In identifying new dyes for (DSSCs), multiple criteria such as broad absorption spectra, stable metal oxide binding and reduced aggregation of dye need to be considered.

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The dyeing of cellulose with direct dyes. Part III.—The aqueous diffusion of direct dyes

Cited by 19 publications

References 0 publications

Diffusion coefficients of anticancer drugs and compounds having a similar structure at 30 �C

Diffusion coefficients of anticancer drugs and compounds having a similar structure at 30 �C

Electrochemical and spectroscopic studies of arylazo-2-naphthol metal complexes in dimethylformamide solution

Study Interionic Attraction of anionic dyes by Electrolytic Conductivity Measurement

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