Complexometric titration of Ti(IV) with 2-(5-chloro-2-pyridylazo)-5-dimethylaminophenol as indicator

Marini, H.J.; Antón, Rosa; Olsina, Roberto A.

doi:10.1016/0039-9140(90)80161-8

Cited by 3 publications

(2 citation statements)

References 10 publications

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“…The gravimetric method was used to carry out the determination of silicon [51]. The quantitative determination of titanium was carried out using the method of back titration [52] after the mineralization of polymers with a mixture of concentrated nitric and perchloric acids. Chlorine was determined according to the Schoniger method [53].…”

Section: Elemental Analysis Of the Obtained Compoundsmentioning

confidence: 99%

Interaction of Polyphenylsilsesquioxane with Various β-Diketonate Complexes of Titanium by Mechanochemical Activation

Libanov

Капустина

Шапкин

et al. 2023

Powders

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In the present work, we studied the interaction of polyphenylsilsesquioxane with various β-diketonate complexes of titanium by mechanochemical activation. Polyphenylsilsesquioxane, bis-(2,4-pentanedionate) titanium dichloride, bis-(1-phenyl-1,3-butanedionate) titanium dichloride, and bis-(1,3-diphenyl-1,3-propanedionate) titanium dichloride were used as starting reagents. Various chemical and physicochemical methods of analysis were used to study the synthesis products. The composition of the obtained compounds has been determined. It is shown that under conditions of mechanochemical activation, high-molecular-weight products with a Si/Ti ratio different from the specified ones are formed. In addition, under the action of mechanical stresses, the initial titanium complexes (except for acetylacetonate complex) polymerize with the formation of coordination of high-molecular-weight compounds, which are destroyed by the addition of ethyl alcohol. It has been established that with an increase in the volume of the organic ligand, titanium atoms enter the polymer siloxane chain to a lesser extent. This work is aimed at finding efficient and environmentally friendly methods for the synthesis and modification of organometallic macromolecular compounds.

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Section: Elemental Analysis Of the Obtained Compoundsmentioning

confidence: 99%

Interaction of Polyphenylsilsesquioxane with Various β-Diketonate Complexes of Titanium by Mechanochemical Activation

Libanov

Капустина

Шапкин

et al. 2023

Powders

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“…The determination of silicon was carried out by the gravimetric method [48]. The quantitative determination of titanium was carried out by the method of back titration [49] after the mineralization of polymers with a mixture of concentrated nitric and perchloric acids. Chlorine was determined according to the Schoniger method [50].…”

Section: Interaction Of Polyphenylsilsesquioxane With Dichlorobis-(3-oxo-13-diphenylprop-1-en-1-olate) Titanium (Iv)mentioning

confidence: 99%

Interaction of Polyphenylsilsesquioxane With Various β-diketonate Complexes of Titanium By Mechanochemical Activation

Libanov

Капустина²,

Шапкин³

et al. 2022

Preprint

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In the present work, we studied the interaction of polyphenylsilsesquioxane with various β-diketonate complexes of titanium by mechanochemical activation. Polyphenylsilsesquioxane, bis-(2,4-pentanedionate) titanium dichloride, bis-(1-phenyl-1,3-butanedionate) titanium dichloride and bis-(1,3-diphenyl-1,3-propanedionate) titanium dichloride were used as starting reagents. Synthesis products were studied by various chemical and physicochemical methods of analysis. The composition of the obtained compounds has been determined. It is shown that under conditions of mechanochemical activation, high molecular weight products with a Si/Ti ratio different from the specified ones are formed. In addition, under the action of mechanical stresses, the initial titanium complexes (with the exception of acetylacetonate) polymerize with the formation of coordination high-molecular compounds, which are destroyed by the addition of ethyl alcohol. The work is fundamental and contributes to the understanding of the mechanisms of mechanochemical synthesis. The work is aimed at finding effective and environmentally friendly methods for the synthesis and modification of elementorganic high-molecular compounds.

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TXRF heavy metal analysis after immobilization as PAN complexes

Kallithrakas‐Kontos

2003

X-Ray Spectrometry

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1‐(‐2‐Pyridylazo)‐2‐naphthol (PAN) forms stable complexes with many metals of environmental interest. A few micrograms of PAN were immobilized in a Nafion membrane, the membrane was put on quartz reflectors and the reflectors were immersed in standard aqueous solutions containing nickel, copper, manganese and vanadium salts at very low concentrations (µg l−1 level). The reflectors were left in the solutions for many hours at constant temperature. When the equilibration stage was finished, they were cleaned with ultra‐pure water and left to dry. Analysis of the samples was performed by total reflection x‐ray fluorescence (TXRF) spectrometry. A few µg l−1 of the above metals were determined. The effects of equilibration time and temperature on the measured x‐ray yields were examined. Copyright © 2003 John Wiley & Sons, Ltd.

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Complexometric titration of Ti(IV) with 2-(5-chloro-2-pyridylazo)-5-dimethylaminophenol as indicator

Cited by 3 publications

References 10 publications

Interaction of Polyphenylsilsesquioxane with Various β-Diketonate Complexes of Titanium by Mechanochemical Activation

Interaction of Polyphenylsilsesquioxane with Various β-Diketonate Complexes of Titanium by Mechanochemical Activation

Interaction of Polyphenylsilsesquioxane With Various β-diketonate Complexes of Titanium By Mechanochemical Activation

TXRF heavy metal analysis after immobilization as PAN complexes

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