Triarylmethane and Diarylmethane Dyes

Geßner, Thomas; Mayer, Udo

doi:10.1002/14356007.a27_179

Cited by 68 publications

(50 citation statements)

References 224 publications

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“…It is estimated that over 700,000 tons of dyes and pigments are produced annually worldwide, 20% of which are utilized for textile dyeing and finishing processes [1]. Many of these synthetic dyestuffs cannot be removed using conventional treatments due to their complex polyaromatic structures, resulting in various environmental problems [2].…”

Section: Introductionmentioning

confidence: 99%

“…Many of these synthetic dyestuffs cannot be removed using conventional treatments due to their complex polyaromatic structures, resulting in various environmental problems [2]. The textile, paper, food, cosmetic, and leather goods industries are all major consumers of triphenylmethane dyes [1,2]. Previous reports [3,4] have demonstrated the photodegradation of triphenylmethane dyes containing N -alkylamine groups via consecutive N-de-alkylation reactions.…”

Section: Introductionmentioning

confidence: 99%

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Determining the degradation efficiency and mechanisms of ethyl violet using HPLC-PDA-ESI-MS and GC-MS

Chung

Lin

et al. 2012

Chemistry Central Journal

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Background: The discharge of wastewater that contains high concentrations of reactive dyes is a well-known problem associated with dyestuff activities. In recent years, semiconductor photocatalysis has become more and more attractive and important since it has a great potential to contribute to such environmental problems. One of the most important aspects of environmental photocatalysis is in the selection of semiconductor materials like ZnO and TiO 2 , which are close to being two of the ideal photocatalysts in several respects. For example, they are relatively inexpensive, and they provide photo-generated holes with high oxidizing power due to their wide band gap energy. In this work, nanostructural ZnO film on the Zn foil of the Alkaline-Manganese Dioxide-Zinc Cell was fabricated to degrade EV dye. The major innovation of this paper is to obtain the degradation mechanism of ethyl violet dyes resulting from the HPLC-PDA-ESI-MS analyses. Results: The fabrication of ZnO nanostructures on zinc foils with a simple solution-based corrosion strategy and the synthesis, characterization, application, and implication of Zn would be reported in this study. Other objectives of this research are to identify the reaction intermediates and to understand the detailed degradation mechanism of EV dye, as model compound of triphenylmethane dye, with active Zn metal, by HPLC-ESI-MS and GC-MS.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Determining the degradation efficiency and mechanisms of ethyl violet using HPLC-PDA-ESI-MS and GC-MS

Chung

Lin

et al. 2012

Chemistry Central Journal

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“…Despite moderate yields being observed in many cases, the protocol is operationally simple and enables the one-step production of poly-substituted diarylmethanes from bulk commodity chemicals. The facility for rapidly generating high value functionalised arenes of biological interest was demonstrated in the one-step preparation of penta-O-methoxy vidalol A (8). Initial studies have revealed that this reaction likely proceeds via primary di-halogenation followed by a copper mediated coupling of a benzylic radical.…”

Section: Discussionmentioning

confidence: 99%

“…As a demonstration of the applicability of this methodology, we set out to synthesize penta-O-methyl vidalol A (8), which has shown moderate carbonic anhydrase inhibitory activity, in a single step. 10i The poly-substituted toluene 7 was prepared and used as the benzylic component under our tandem reaction conditions with 1a.…”

Section: Substrate Scopementioning

confidence: 99%

“…8 A number of pharmacologically active natural products contain the diarylmethane subunit, 9 such as the vidalols A and B; halogenated diarylmethanes recently isolated from marine algae and shown to possess a wide range of biological activities, such as inhibition of carbonic anhydrase and phospholipase A2 (Figure 1). 10 The synthesis of diarylmethanes is generally carried out using nucleophilic substitution or cross-coupling of α-(pseudo)halide bearing benzylic units.…”

Section: Introductionmentioning

confidence: 99%

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Cross‐Dehydrogenative‐Coupling of Alkoxybenzenes with Toluenes: Copper(II) Halide Mediated Tandem Halo/Benzylation of Arenes

Storr

Teskey

Greaney

2016

Chemistry A European J

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Abstract:A cross-dehydrogenative-coupling of alkoxybenzenes and toluenes with concomitant halogenation is reported. Conditions employed were the use of stoichiometric copper halide salts and dialkylperoxides to afford a range of bromoalkoxydi-and triarylmethanes. Preliminary mechanistic studies suggest that the in situ production of haloarenes (or dihaloarenes) followed by a copper mediated coupling of a benzylic radical is operational.

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Aromatic Amino and Nitro–Amino Compounds and Their Halogenated Derivatives

Darby

2023

Patty's Toxicology

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The fundamental aromatic hydrocarbon benzene, when substituted by one or more functional groups of the amine, nitro, or halogen classes, alone or in various combinations, provides an enormous number of compounds of immense practical value, ubiquitous presence in the industrial world, and often heightened toxicity relative to benzene itself, a notorious cause of blood cancer. This chapter begins by providing a general overview of aromatic compounds possessing amino and/or nitro substituents, with or without halogen substituents. The production and uses, exposure and biomonitoring, toxicity, and toxic mechanism of action are introduced. The remainder of the chapter focuses on specific compounds in a roughly systematic order based upon chemical structure, expanding on the same subheadings as covered in the general overview. The nomenclature of these compounds can be very confusing since many have traditional names that sometimes markedly differ from their systematized formal names. In this chapter, the same traditional names are used as were used in the previous edition of this publication, but if there is ambiguity of nomenclature, the Chemical Abstracts Service (CAS) numbers provided herein correspond to unique structures, each of which may have several names depending upon the naming convention. In general, when an aromatic compound has an amino or a nitro substituent, it is referred to as an “aniline” or a “nitrobenzene,” respectively, based upon the names of the parent compounds, even though other substituents may be present. When amino and nitro groups are present on the same benzene ring, “aniline” takes precedence, and both “aniline” and “nitrobenzene” take precedence over halogens. There are many exceptions to these general rules, however.

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Triarylmethane and Diarylmethane Dyes

Abstract: The article contains sections titled: 1. Definition and Chromophores 1.1. Definition … Show more

Cited by 68 publications

References 224 publications

Determining the degradation efficiency and mechanisms of ethyl violet using HPLC-PDA-ESI-MS and GC-MS

Determining the degradation efficiency and mechanisms of ethyl violet using HPLC-PDA-ESI-MS and GC-MS

Cross‐Dehydrogenative‐Coupling of Alkoxybenzenes with Toluenes: Copper(II) Halide Mediated Tandem Halo/Benzylation of Arenes

Aromatic Amino and Nitro–Amino Compounds and Their Halogenated Derivatives

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