cas 548-62-9, Crystal Violet | Articles data

Articles about 548-62-9Total 11 be found

Method for preparing triarylmethane compounds and application thereof
The invention discloses a method for preparing a triarylmethane dye. 4,4'-N,N-disubstituted aminodiphenylmethane (bass) and aromatic amines or substituted aromatic amines, phenols or substituted phenols are dissolved in a solvent, metal complexes and tetrachlorobenzoquinone are used as catalysts and oxygen is used as oxidant, the mixture reacts for 5-8 hours at acid conditions and a certain temperature, so that the product triarylmethane dye is obtained in one step, and the commercialized product is obtained through further treatment, so as to meet the application requirement in different fields. The method is simple and safe, and has high yield and less three-wastes.
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Paragraph 0028-0033

(2019/11/13)

Chemodosimeter for CN- - Interplay between experiment and theory
The reaction-based cost effective detection of CN- over the most competitive ions, F- and Ac-, by a commercially available dye has been developed. The experimental results are in good agreement with the theory. An application in the form of 'dip-sticks' which provides an instant information, has been demonstrated.
Kaur, Paramjit,Sareen, Divya,Singh, Kamaljit
supporting information; experimental part
p. 9607 - 9610
(2012/08/28)

Modification of crystal violet - Sulfite ion equilibrium induced by SDS micelles
The presence of sodium dodecylsulfate micelles was found to displace the equilibrium between crystal violet and sulfite ion in the direction of the former and lead to complete recovery of the dye. The underlying mechanism for this anomalous behaviour was elucidated and the rate of the reversal process determined.
Fernandez,Garcia-Rio,Leis,Mejuto,Perez-Lorenzo
p. 52 - 55
(2007/10/03)

Microwave-assisted synthesis of 4,4′-diaminotriphenylmethanes
A fast, efficient and versatile route of synthesis of 4,4′- diaminotriphenylmethanes under microwave irradiation, suitable for parallel library syntheses were developed.
Guzmán-Lucero,Guzmán,Likhatchev,Martínez-Palou
p. 1119 - 1122
(2007/10/03)

Reactions of aniline with alkali metal diphenylketyls and dianions derived from benzophenone and Michler's ketone
Potassium diphenylketyl and benzophenone dianion react with aniline to afford N-(diphenylmethylene) aniline. Under analogous conditions, the corresponding sodium and lithium derivatives undergo disproportionation with formation of triphenylmethanol, benzo
Turaeva,Kurbatov
p. 1787 - 1790
(2007/10/03)

Oxidative coupling-type mechanism of N,N-dialkylanilines in solvent-free conditions forming crystal violet derivatives. A clay-mediated and microwave-promoted approach
In the clay-mediated reaction of N,N-disubstituted anilines using microwave radiation as an energy source in the absence of solvent, crystal violet and derivatives, diphenylmethanes, and biphenyls were isolated along with intermediates supporting an oxidative coupling-type mechanism.
Lopez-Cortes,Penieres-Carrillo,Ortega-Alfaro,Gutierrez-Perez,Toscano,Alvarez-Toledano
p. 1299 - 1304
(2007/10/03)

Carbenium ion-carbinol equilibration for basic triarylmethane dyes: Relative reactivities of dyes in aq. solutions
Equilibria and kinetics of carbenium ion-to-carbinol base reactions for a set of selected basic triarylmethane dyes in aq. buffer solutions of low ionic strength have been measured spectrophotometrically.Relative reactivities of the dyes towards nucleophilic attack by hydroxide ion, on the basis of both equilibrium constant and forward rate constant of the reaction, have been found to follow the same order: malachite green (MG)> brillant green (BG)>> Victoria pure blue BO(VB)> methyl violet (MV) = crystal violet (CV)> ethyl vioet (EV).A fairly good correlation between elec trophilicities of the dyes and ?R+ parameters of their 4-alkylamino substituents has been obtained
Gupta, Susanta K. Sen,Arvind, Udai
p. 998 - 1000
(2007/10/02)

EFFECTIVENESS OF THE COMPLEXES OF AROMATIC POLYCYCLIC HYDROCARRBONS WITH IRON(III) CHLORIDE IN THE OXIDATIVE DEMETHYLATION OF DIMETHYLANILINE
The effect of the structure of polycylic aromatic hydrocarbons and graphite in the coordination sphere of iron(III) chloride in the oxidative demethylation of dimethylaniline was established.A linear relation was obtained between the yield of Crystal violet and the calculated reactivity indices, defined as the ratio of the localization centers of the positive charge and the radical in the ? system of the hydrocarbon to the product of thenumber of nuclei and ligands in the complexes.
Kochkanyan, R. O.,Zheryakova, G. I.,Ponomarev, A. V.
p. 738 - 742
(2007/10/02)

MECHANISM OF THE OXIDATION OF THE LEUCO BASE OF CRYSTAL VIOLET IN THE Cu(II)-O2 SYSTEM
The kinetics of the oxidation of the leuco base of crystal violet in the Cu(II)-O2 system were investigated by a spectrophotometric method in ethanol solution at 50 deg C.A mechanism involving the reversible stage of reaction of the leuco base or its monoprotonated form with Cu(II) is proposed.The radical of the dye, which is formed at the first stage, is then oxidized by oxygen to form the dye.
Fedorova, T. M.,Kaliya, O.L.
p. 2008 - 2011
(2007/10/02)

MECHANISM OF OXIDATION OF LEUCO BASES OF TRIARYLMETHANE DYES BY OXYGEN
The kinetics of the oxidation of the leuco bases of triarylmethane dyes by oxygen were investigated.It was established that the oxidating agent was the peroxy radicals of the solvent.The leuco base is oxidized in the protonated form.A mechanism which involves the formation of a complex between the protonated leuco base and the peroxy radical is proposed.The decomposition of the complex in the controlling stage of the process leads to the formation of the dye.
Fedorova, T. M.,Kaliya, O. L.
p. 1348 - 1352
(2007/10/02)

UNEXPECTED HIGH PHOTOIXIDIZING EFFICIENCY OF BENZOPHENONE DERIVATIVES HAVING TETRAALKYLAMMONIUM SUBSTITUENTS
Benzophenone derivatives having various tetraalkylammonium ion in the 4 position (II, III, IV, and V) were found to be much more efficient senzitizers than benzophenone(I) in photooxidation of Leuco Crystal Violet(LCV) to Crystal Violet(CV+) in acetonitrile in air, which was interpreted in terms of the cationic atmosphere effect facilitating the primary electron transfer process from LCV to BP*3.
Tazuke, Shigeo,Kawasaki, Yasuhiro,Kitamura, Noboru,Inoue, Takashi
p. 251 - 254
(2007/10/02)