Dyes, General Survey

Booth, Gerald; Zollinger, Heinrich; McLaren, Keith R.; Sharples, W. G.; Westwell, A.

doi:10.1002/14356007.a09_073

Cited by 48 publications

(32 citation statements)

References 122 publications

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“…The following ruthenium complexes were prepared according to the literature: Ru(CO) 2 (4) [21]. The spectroscopic characteristics of these complexes were in agreement with the data reported.…”

Section: Instruments and Materialssupporting

confidence: 74%

“…Amines play an important role in the synthesis of organic chemicals since they are intermediates in the production of agrochemicals [1], dyes [2], fibers [3], pharmaceuticals [4] and others [5]. The hydrogenation of a CN, N@N or NO 2 group may be an important route to produce a variety of amines such as aniline, benzylamine, ecc.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, we report some recent achievement on the catalytic activity of Ru(II) dihydride complexes in the homogeneous hydrogenation of a R-N@N-R, R-N(O)@N-R, or RNO 2 group and in the hydrogenolysis of a R-NH-NH-R compound (R = Ph). The RuH 2 -(CO) 2 (4) complexes were chosen in consideration of their well-known catalytic activity in the hydrogenation of unsaturated substrates such as alkenes and carbonylic compounds [15].…”

Section: Introductionmentioning

confidence: 99%

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Hydrogenation of single and multiple N–N or N–O bonds by Ru(II) catalysts in homogeneous phase

Toti

Frediani

Salvini

et al. 2005

Journal of Organometallic Chemistry

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The ruthenium(II) complexes RuH 2 (CO) 2 (P n Bu 3 ) 2 , RuH 2 (CO) 2 (PPh 3 ) 2 , and RuH 2 (PPh 3 ) 4 are catalytically active in the hydrogenation of organic substrates containing a N@N, N(O)@N or NO 2 group. The reduction of the first two groups leads to hydrazine as intermediate and amine as the final product, while reducing a NO 2 group the corresponding amine is selectively formed. A complete conversion was reached, depending on temperature, catalyst and substrate concentration. The catalysts are also active in the hydrogenolysis of an N-N group giving the corresponding amine with a 97.3% conversion using RuH 2 (PPh 3 ) 4 as catalyst. A firstorder reaction rate with respect to substrate, catalyst or hydrogen pressure was detected in all cases. Finally, the activation parameters and the kinetic constants of these reactions were calculated. In the hydrogenation of azobenzene, the rate determining step involves an associative or a dissociative step depending on the catalyst employed while in the hydrogenation of all other substrates an associative rate determining step is always involved. A catalytic cycle is suggested for the hydrogenation of azobenzene, taking into account the intermediate complexes identified in the reaction medium.

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Section: Instruments and Materialssupporting

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hydrogenation of single and multiple N–N or N–O bonds by Ru(II) catalysts in homogeneous phase

Toti

Frediani

Salvini

et al. 2005

Journal of Organometallic Chemistry

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“…Organic dyes are a class of pollutants that are commonly found in industrial wastewater due to their wide application as colorants for textiles, papers, food, and as imaging agents. 1 There are more than 100 000 commercially available organic dyes of various sizes, colors, and ionicity that are being produced annually. 2 Aside from their toxicities and carcinogenicities, these colored effluents may interfere with the absorption and reection of light in water, thereby affecting biological processes in natural systems.…”

Section: Introductionmentioning

confidence: 99%

Sequestration of orange G and methylene blue from aqueous solutions using a Co(ii) coordination polymer

Fulong

Cook

2017

RSC Adv.

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“…Dyes are a large and varied class of compounds with coloring abilities that usually show affinity for the substrate they are applied on, generally in aqueous solution, with or without the use of a mordant for improved fastness [2]. They are widely used in many fields, such as the 146 textile industry, plastics, cosmetics, paper industry and many others [3].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical sensors for malachite green based on carbonaceous nanomaterials

Săcară¹,

Mureşan²

2017

Studia UBB Chemia

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Synthetic dyes are widely used in many fields, such as textile industry, plastics, cosmetics, paper industry and many others. Due to their toxicity, they should be removed from wastes before discharging in the environment. In order to determine the efficiency of the removal process, different methods are used to detect traces of dyes in wastewaters. The most used are spectrophotometry and FIA, however the expensive equipment and complicated testing process make these methods difficult to use. On the contrary, electrochemical sensors have multiple advantages such as short response time, low price and easiness to use. In this context, several electrochemical sensors based on new carbonaceous materials were developed and characterized. Carbon nanotubes, graphene and activated carbon from Abies nordmanniana cones together with Nafion were used to modify the surface of a glassy carbon electrode by drop casting. The resulting modified electrodes were tested by SWASV and amperometry for Malachite Green detection in aqueous solutions, having low detection limits in the order of μM.

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Dyes, General Survey

Cited by 48 publications

References 122 publications

Hydrogenation of single and multiple N–N or N–O bonds by Ru(II) catalysts in homogeneous phase

Hydrogenation of single and multiple N–N or N–O bonds by Ru(II) catalysts in homogeneous phase

Sequestration of orange G and methylene blue from aqueous solutions using a Co(ii) coordination polymer

Electrochemical sensors for malachite green based on carbonaceous nanomaterials

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