Heterocyclic Dyes and Pigments

Waring, David R.

doi:10.1016/b978-008096519-2.00012-6

Cited by 13 publications

(9 citation statements)

References 91 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The twofold Sonogashira reaction of 3,5-dibromo-4-chloropyridine (1) with various alkynes afforded, as previously reported, [27] 3,5-dialkynyl-4-chloropyridines 2 a-c (Scheme 2). The reactions proceeded with excellent chemoselectivity in favour of positions 3 and 5, due to the fact that oxidative addition occurs more readily with aryl bromines compared to respective chlorine derivatives.…”

Section: Synthesissupporting

confidence: 56%

“…An early example of such a compound is flavanthrone, a molecule based on diazapyrene, which was prepared and structurally elucidated by Roland Scholl already in 1907. [1,2] In the last decades, large π-conjugated polycyclic aromatic hydrocarbons (PAHs) and their heteroaromatic counterparts have received a lot of attention, due to their broad spectrum of applications. [3][4][5][6][7] In this context, nitrogen is the by far most often used element for the doping of PAHs.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis and Properties of Diphenylbenzo[j]naphtho[2,1,8‐def][2,7]phenanthrolines

Mertz

Molenda

Boldt

et al. 2023

Chemistry A European J

View full text Add to dashboard Cite

A series of hitherto unknown 5,14‐diphenylbenzo[j]naphtho[2,1,8‐def][2,7]phenanthrolines, containing a 5‐azatetracene and a 2‐azapyrene subunit, were prepared by combination of Pd‐catalyzed cross‐coupling reactions with a one‐pot Povarov/cycloisomerization reaction. In the final key step four new bonds are formed in one step. The synthetic approach allows for a high degree of diversification of the heterocyclic core structure. The optical and electrochemical properties were studied experimentally and by DFT/TD‐DFT and NICS calculations. Due to the presence of the 2‐azapyrene subunit, the typical electronic nature and characteristics of the 5‐azatetracene moiety are lost and the compounds are electronically and optically more related to 2‐azapyrenes.

show abstract

Section: Synthesissupporting

confidence: 56%

Section: Introductionmentioning

confidence: 99%

Synthesis and Properties of Diphenylbenzo[j]naphtho[2,1,8‐def][2,7]phenanthrolines

Mertz

Molenda

Boldt

et al. 2023

Chemistry A European J

View full text Add to dashboard Cite

show abstract

“…Heterocycles are essential to life and function, ranging from key scaffolds in nucleic acids, enzymes and vitamins, to their role in fundamental biochemical processes. [1] Heterocyclic frameworks are ubiquitous in medicinal, agricultural and technological industries, with applications including: antifungal and anticancer agents; [1a,2] pesticides and plant growth regulators; [1a,3] and as key motifs in pigments, [4] fluorescent agents [5] and food additives. [1a] Due to their vast applications, the development of efficient synthetic approaches to functionalized heterocycles has been at the forefront of chemical research for many decades.…”

Section: Introductionmentioning

confidence: 99%

Regioselectivity for the Rh(I)‐catalyzed Annulation of 1,2,3‐Thiadiazoles with Alkynes: Experimental and Computational Analysis Reveal the Surprising Role of the Alkyne Substituent

Reza,

Tokareva,

Dobson

et al. 2023

ChemCatChem

View full text Add to dashboard Cite

The Rh(I)‐catalyzed denitrogenative annulation reactions of 1,2,3‐thiadiazoles are a new direct approach to synthesizing densely functionalized heterocycles. The synthesis of multisubstituted thiophenes is possible using this methodology, however the difficulty to predict which regioisomer will form is a current limitation. In this current work, systematic computational and experimental studies were performed addressing how the terminal alkyne substituent effects regioselectivity. Our data revealed that the electronic and steric properties of the alkyne substituent effects regioselectivity, including whether the group is aryl or alkyl. The insight gained from our study has allowed the development of a framework for predicting regioselectivity for the Rh(I)‐catalyzed denitrogenative transannulation of 1,2,3‐thiadiazoles with terminal alkynes.

show abstract

“…Both water soluble and insoluble class of azo dyes have carcinogenic properties and when these dyes are absorbed by human body can undergo decomposition and form amines by the enzymatic activity of body. Currently this includes the 24 amines classified as substances known to be human carcinogens (Waring, 1984;Gregory, 1986;EPA, 1999;Ziarani et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

BIODEGRADATION OF THE AZO DYE (REMAZOL BLACK B) BY Pseudomonas putida ISOLATED FROM TEXTILE WASTEWATER SAMPLE

Arabia¹

2019

JEBAS

View full text Add to dashboard Cite

The synthetic aromatic compounds, Azo dyes, which have one or more -N=Ngroups, are the most important and largest class of the used dyes with commercial applications especially in food and textile industries. The cleaning of textile wastewater containing dyes has attracted much attention in the recent years. The present study is an attempt to determine the ability of some bacterial isolates obtained from textile wastewater sample from Al Khumra station for decolorization of the Azo dye, Remazol black B. Three bacterial isolates were isolated from wastewater of textile effluents containing azo dye on basal nutrient medium. These isolated bacterial isolates were identified as Bacillus cereus, B. pumilus and Pseudomonas putida by phylogenetic analysis of their 16S rDNA. The most promising bacterial isolate was Pseudomonas putida and was used for further study. Results of study revealed that P. putida have ability of complete biodegradation (100%), if concentration is at 400 ppm while this degradation was 60 and 30 percent at 600 and 700 ppm concentration of azo dye respectively. Further, rate of biodegradation also depend on the pH and temperature of the surrounding medium, at 400 ppm concentration of azo dye, maximum degradation was obtained at pH 6.5 and temperature 40°C. This decolorization potential increased the applicability of this bacterium for the dye removal and the results suggest that the obtained isolate of P. putida can be used as a useful tool to treat waste water containing Azo dyes. Degradation potential of the bacterium depend on the presence of azoreductases, laccases and peroxidases enzymes.

show abstract

Heterocyclic Dyes and Pigments

Cited by 13 publications

References 91 publications

Synthesis and Properties of Diphenylbenzo[j]naphtho[2,1,8‐def][2,7]phenanthrolines

Synthesis and Properties of Diphenylbenzo[j]naphtho[2,1,8‐def][2,7]phenanthrolines

Regioselectivity for the Rh(I)‐catalyzed Annulation of 1,2,3‐Thiadiazoles with Alkynes: Experimental and Computational Analysis Reveal the Surprising Role of the Alkyne Substituent

BIODEGRADATION OF THE AZO DYE (REMAZOL BLACK B) BY Pseudomonas putida ISOLATED FROM TEXTILE WASTEWATER SAMPLE

Contact Info

Product

Resources

About