Metal complexes of 4-(2'-thiazolylazo)-resorcinolA comparative study with 4-(2'-pyridylazo)-resorcinol

Stanley, R.W.; Cheney, G.E.

doi:10.1016/0039-9140(66)80244-8

Cited by 36 publications

(11 citation statements)

References 14 publications

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“…Early literature indicates that PAR is able to associate with large numbers of metal ions from the d, p and f blocks of the periodic table [69][70][71][72][73][74]. The binding of metal ions to the PAR molecule is associated with the deprotonation of the phenolic group (pK a3 ), which has major implication for the electronic spectra of PAR (Fig.…”

Section: Metal Binding Properties Of Parmentioning

confidence: 99%

Molar absorption coefficients and stability constants of metal complexes of 4-(2-pyridylazo)resorcinol (PAR): Revisiting common chelating probe for the study of metalloproteins

Kocyła

Pomorski

Krężel

2015

Journal of Inorganic Biochemistry

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Section: Metal Binding Properties Of Parmentioning

confidence: 99%

Molar absorption coefficients and stability constants of metal complexes of 4-(2-pyridylazo)resorcinol (PAR): Revisiting common chelating probe for the study of metalloproteins

Kocyła

Pomorski

Krężel

2015

Journal of Inorganic Biochemistry

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“…The reason for the faster hydrolysis of the β‐thiopropionate ester of PAR containing oligomers was the better leaving property of PAR in comparison with DCP. According to the literature, phenol groups in PAR showed higher acidity (pK a 1,2 ≈ 6.9, 12.4) than the phenol groups of DCP (pK a1,2 ≈ 7.6, 11.6) . Esters bearing better leaving groups can hydrolyze faster in aqueous media.…”

Section: Resultsmentioning

confidence: 99%

Oligo(thioether‐ester)s Blocks in Polyurethanes for Slowly Releasing Active Payloads

Klahan

Seidi

Crespy

2018

Macro Chemistry & Physics

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The preparation of acid‐responsive degradable oligomers with active agents in their main chains is described. Dichlorophene (DCP), an effective anticestodal agent, and the corrosion inhibitor 4‐(2‐pyridylazo)resorcinol (PAR) are reacted to form polymerizable bisacrylate derivatives. The derivatives are then copolymerized with aliphatic and aromatic dithiols by thiol‐Michael addition to obtain a polymer backbone with cleavable thiopropionate groups. Low molecular weight (M n < 10 000 g mol−1) linear oligomers are obtained, which can be used for the preparation of poly(ester‐urethane)s. Polymer nanoparticles from both oligo(thioether‐ester) and poly(ester‐urethane)s are fabricated by the miniemulsion‐solvent evaporation method. The polymers in solution and dispersion can be gradually degraded in acidic media. The degraded products of the degradation of PAR containing polymers can be detected in the presence of copper ions.

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“…Ethanol decreases the dielectric constant of the ethanol-acetic acid-water system to low value helping formation of negatively charged complexes. It is assumed that the electrostatic interaction, surface complexation, and ion-exchange mechanisms may be identified as the main adsorption mechanisms that work individually or in combination for the adsorption of metal ions on the adsorbents in a good agreement with Deng and Bai [22].…”

Section: -D Effect Of Addition Of Ethanolmentioning

confidence: 99%

“…Geary et al [21] concluded that the dye acted as tridentate ligand towards bivalent metal ions. However, Stanely and Cheny [22], showed that no reference was made to the possibility that resorcinol could exist in a Transform. The electrostatic interaction and formation of complex compounds may be identified as the major adsorption mechanisms.…”

Section: -B Effect Of the Resorcinol Dye And Dosagementioning

confidence: 99%

Separation of some heavy metal species from electroplating rinsing solutions by ion exchange resin

Badawy

Rabah

Hasan³

2013

IJEWM

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Strongly basic anion exchange lewatit MP 600 resin was tested to separate metal species form electroplating rinsing wastewater. An azo resorcinol 4-(2-pyridylazo) dyestuff was used as a complexing agent. Adsorption isotherms have been modeled in ethanol/acetic acid/water media. The loaded resin is regenerated using 4 M HCl whereby the eluted metal species are recovered. Results revealed that mere anion exchanger cannot uptake metal ions unless they reacted with the dye to form negatively charged complexes. Trivalent chromium showed significant uptake at pH range of 3.5-4.5. Cadmium, zinc and nickel ions formed complex compounds in the alkaline medium. The electrostatic interaction and formation of complex compounds identified the major adsorption mechanisms. The uptake capacity of the sorbent is directly proportional to the electro negativity of the metal-dye complexes. Ethanol and acetic acid enhanced formation of the dye-metal complexes by decreasing the dielectric constant of the ethanol/acetic acid-water ternary system.

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Metal complexes of 4-(2'-thiazolylazo)-resorcinolA comparative study with 4-(2'-pyridylazo)-resorcinol

Cited by 36 publications

References 14 publications

Molar absorption coefficients and stability constants of metal complexes of 4-(2-pyridylazo)resorcinol (PAR): Revisiting common chelating probe for the study of metalloproteins

Molar absorption coefficients and stability constants of metal complexes of 4-(2-pyridylazo)resorcinol (PAR): Revisiting common chelating probe for the study of metalloproteins

Oligo(thioether‐ester)s Blocks in Polyurethanes for Slowly Releasing Active Payloads

Separation of some heavy metal species from electroplating rinsing solutions by ion exchange resin

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