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Journal articles on the topic 'Organic dyestuffs'

Author: Grafiati

Published: 3 June 2025

Last updated: 19 July 2025

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1

Lee, Che-Lung, Wen-Hsi Lee, and Cheng-Hsien Yang. "Triazoloisoquinoline-Based/Ruthenium-Hybrid Sensitizer for Efficient Dye-Sensitized Solar Cells." International Journal of Photoenergy 2013 (2013): 1–5. http://dx.doi.org/10.1155/2013/984516.

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Triazoloisoquinoline-based organic dyestuffs were synthesized and used in the fabrication of dye-sensitized solar cells (DSSCs). After cosensitization with ruthenium complex, the triazoloisoquinoline-based organic dyestuffs overcame the deficiency of ruthenium dyestuff absorption in the blue part of the visible spectrum. This method also fills the blanks of ruthenium dyestuff sensitized TiO2film and forms a compact insulating molecular layer due to the nature of small molecular organic dyestuffs. The incident photon-to-electron conversion efficiency of N719 at shorter wavelength regions is 49%. After addition of a triazoloisoquinoline-based dyestuff for co-sensitization, the IPCE at 350–500 nm increased significantly. This can be attributed to the increased photocurrent of the cells, which improves the dye-sensitized photoelectric conversion efficiency from 6.23% to 7.84%, and the overall conversion efficiency increased by about 26%. As a consequence, this low molecular weight organic dyestuff is a promising candidate as coadsorbent and cosensitizer for highly efficient dye-sensitized solar cells.

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2

Yazıcı, Hikmet. "Dyeing of wooden parts with organic dyes by boiling together method." BioResources 19, no. 3 (2024): 6569–83. http://dx.doi.org/10.15376/biores.19.3.6569-6583.

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Wood specimens were dyed by boiling them in the presence of walnut shells and dye to penetrate the dyestuff into the sample. Specimens prepared from Scots pine, oak, and beech woods were boiled separately in walnut shell, water, and NaOH environment, and the penetration of the dyestuff into the samples was ensured. Sodium hydroxide solution was preferred because it facilitates the dissolution of the hemicelluloses in the wood and the dyestuffs in the walnut shell. Alum was added in other samples to reveal the mordant effect on the adhesion of dyestuffs to wood. Thermogravimetric (TG) analysis revealed that wood degradation primarily occurs due to evaporation of free water at 50 to 120 °C, followed by lignin and cellulose breakdown across a wide temperature range of 160 to 600 °C. Treatment with NaOH and NaOH+alum notably reduced the peak temperatures in differential-thermogravimetric analysis by indicating an effect on lignin. This was supported by Fourier transform infrared analysis, particularly in the disappearance of carboxyl groups at 1710 cm–¹ and significant decreases in peak intensities at 1027, 1247, 1315, and 1501 cm–¹. Based on the findings, it was concluded that the dyed parts obtained can be used in the wooden toy industry.

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3

NAKAZUMI, Hiroyuki. "Fading Degradation of Organic Dyestuffs." Journal of the Japan Society of Colour Material 63, no. 11 (1990): 677–84. http://dx.doi.org/10.4011/shikizai1937.63.677.

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4

Paskins, Mat. "Dyeing off: On the deaths of dyestuffs as scientific objects." Science in Context 34, no. 2 (2021): 297–311. http://dx.doi.org/10.1017/s0269889722000163.

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AbstractBetween the 1870s and the 1920s, the dye industry was at the center of claims about the productivity of organic chemistry. Dyestuffs were widely represented as the most complex molecules to find commercial application, and positioned at the center of nationalist projects to establish chemical industry, especially in Britain and the United States. By the later twentieth century, the complex of scientific hopes which surrounded dyestuffs had largely disappeared. In Hans-Jörg Rheinberger’s terms, they had changed from “epistemic things” to, at best, “technical objects,” and lost their future-bearing status as the lynchpin of organic chemistry. Although developments in dyeing continue, dyestuffs have vacated the scientifically and culturally dynamic position that they once occupied; any restoration of this status would require a radical change in economic and material conditions. This paper considers the senses in which this change of status should be considered as the death of dyestuffs as a scientific object.

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5

Katritzky, Alan R., Wei-Qiang Fan, De-Sheng Liang, and Qiao-Ling Li. "Novel dyestuffs containing dicyanomethylidene groups." Journal of Heterocyclic Chemistry 26, no. 6 (2009): 1541–45. http://dx.doi.org/10.1002/jhet.5570260607.

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6

Pleshkova, A. P., M. N. Uspenskaya, Ya G. Urman, L. S. Shibryaeva, and N. N. Beleva. "Secondary ion mass spectra of organic cationic dyestuffs." Chemistry of Heterocyclic Compounds 28, no. 10 (1992): 1205–10. http://dx.doi.org/10.1007/bf00529590.

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7

Lempa, Evelyn, Carsten Graßmann, Maike Rabe, Andreas Kitzig, and Edwin Naroska. "Color Tuning in Electroluminescent Textiles." Advances in Science and Technology 100 (October 2016): 53–58. http://dx.doi.org/10.4028/www.scientific.net/ast.100.53.

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Currently electroluminescent devices, operated by alternating current (AC-EL) on film, paper or textile are based on a capacitor with one transparent electrode and one generally non-transparent, highly conductive electrode and a light-emitting dielectric layer in-between. The light-emitting pigments are mostly based on doped zinc sulfide. Currently available commercial products contain encapsulated pigments dispersed in organic solvents. Those dispersions allow AC-EL-devices illuminating solitary in the colors white, green, blue-green, blue and orange. Blending those pigments leads to numerous new colors however, always linked to loss of brightness in the final device. In this research work the combination of fluorescent organic and inorganic dyestuffs with inorganic EL-phosphors was investigated. The AC-EL-devices were all based on textile materials; all dispersions were free of organic solvents. Special focus was directed to the concentration of dyes in an additional layer within the EL-capacitor as well as the thickness and particularly the positioning of the layer. In the result colors were achieved, which cannot be found by blending the phosphors, such as yellow and red. In addition, depending on the type of added fluorescent dyestuff layer, the brightness could be increased substantially.

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8

Sugumar, R. Wilfred, and Sandhya Sadanandan. "Combined Anaerobic-Aerobic Bacterial Degradation of Dyes." E-Journal of Chemistry 7, no. 3 (2010): 739–44. http://dx.doi.org/10.1155/2010/987362.

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Wastewaters from the dye baths of a non-formal textile-dyeing unit containing C.I. Acid Orange 7 and C.I. Reactive Red 2 were subjected to degradation in a sequential anaerobic-aerobic treatment process based on mixed culture of bacteria. The technical samples of the dyestuffs and the dye bath wastes were treated in an anaerobic reactor, using an adapted mixed culture of anaerobic microorganisms. The dyestuffs were biotransformed into colourless substituted amine metabolites in the reactor. The biotransformation was assisted by co-metabolic process. The amine metabolites did not undergo further degradation in the anaerobic reactor. The effluent from the anaerobic reactor was treated in an aerobic rotating biological contactor and the amine metabolites were found to undergo complete mineralization. This two stage treatment resulted in 94% elimination of dissolved organic carbon. In addition, 85% of organic nitrogen was converted into nitrate in the aerobic reactor during nitrification process.

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9

POKORNý, JOS. "Qualitative Spectrum Analysis of Organic Dyestuffs by Formánek's Method." Journal of the Society of Dyers and Colourists 33, no. 7 (2008): 162–65. http://dx.doi.org/10.1111/j.1478-4408.1917.tb00969.x.

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10

Rosenberg, Erwin. "Characterisation of historical organic dyestuffs by liquid chromatography–mass spectrometry." Analytical and Bioanalytical Chemistry 391, no. 1 (2008): 33–57. http://dx.doi.org/10.1007/s00216-008-1977-0.

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11

Orlova, N. A., T. N. Gerasimova, and V. V. Shelkovnikov. "Synthesis oftert-butyl substituted polymethine 1-benzothiopyrylium dyestuffs." Chemistry of Heterocyclic Compounds 33, no. 12 (1997): 1400–1404. http://dx.doi.org/10.1007/bf02291640.

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12

SÓJKA- LEDAKOWICZ, Jadwiga, Joanna LEWARTOWSKA, Bogumił GAJDZICKI, Joanna OLCZYK, and Anetta WALAWSKA. "INNOVATIVE UV BARRIER MATERIALS MADE OF ORGANIC COTTON DYED WITH NATURAL DYESTUFFS." TEXTEH Proceedings 2019 (November 5, 2019): 96–99. http://dx.doi.org/10.35530/tt.2019.22.

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The paper presents the results of research works on ecological materials that protect humans against the harmful effects of ultraviolet (UV) radiation, made of organic cotton, obtained through the application of selected natural dyes and a new reactive UV absorber with high molar absorption. These materials are intended for clothing, in particular for children and people with photosensitive skin. Instrumental evaluation of obtained colours and barrier properties of textile products for UV radiation were performed, expressed in the UPF (Ultraviolet Protection Factor) value, determined on the basis of measurements of UV transmittance by a textile product. Due to the application area of the new materials, the colour fastness to washing, perspiration, friction and artificial light. For selected newly developed organic cotton products containing in their structure a natural dye and a new UV organic absorber, specialized irritation tests according to OECD were carried out. In addition, the results of studies on antimicrobial properties are presented on the basis of the assessment of antibacterial activity against Gram (+) Staphylococcus aureus and Gram (-) Escherichiacoli.

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13

Katritzky, Alan R., Qiao-Ling Li, and Wei-Qiang Fan. "Color and constitution. Part8. Some novel dyestuffs containing indoxyl residues." Journal of Heterocyclic Chemistry 25, no. 5 (1988): 1287–92. http://dx.doi.org/10.1002/jhet.5570250503.

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14

Bechtold, T., E. Burtscher, and A. Turcanu. "Anthraquinones as mediators for the indirect cathodic reduction of dispersed organic dyestuffs." Journal of Electroanalytical Chemistry 465, no. 1 (1999): 80–87. http://dx.doi.org/10.1016/s0022-0728(99)00057-1.

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15

Kourkoumelis, N., H. El-Gaoudy, E. Varella, and D. Kovala-Demertzi. "Physicochemical characterization of thermally aged Egyptian linen dyed with organic natural dyestuffs." Applied Physics A 112, no. 2 (2012): 469–78. http://dx.doi.org/10.1007/s00339-012-7435-z.

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16

El Aggadi, Sanaa, Ghizlan Kaichouh, Zoubida El Abbassi, Mohammed Fekhaoui, and Abderrahim EL Hourch. "Electrode material in electrochemical decolorization of dyestuffs wastewater: A review." E3S Web of Conferences 234 (2021): 00058. http://dx.doi.org/10.1051/e3sconf/202123400058.

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Tеxtile wastewater contains a variety of contaminants that are known to be hazardous. Synthetic dyes are one of the hazardous pollutants in the textile industry that are resistant to the photo/bio dеgradation. They cannot be dеstroyed under conventional wastewater treatment. This document presents a review on the electrochemical treatment of wastеwater containing synthetic organic dyes by anodic oxidation for environmental protection. The mechanisms of еlectrochemical oxidation in anodic oxidation processes are well explained. A largе number of electrodes have been tested by this method. Therefore, this papеr aims to summarize and discuss the most important and rеcent results available in the literature on anode application for the rеmoval of synthetic dyestuffs. Finally, the prospects of the process for futurе research are suggested.

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17

Allen, Stephen J., Kayed Y. H. Khader, and Murad Bino. "Electrooxidation of dyestuffs in waste waters." Journal of Chemical Technology AND Biotechnology 62, no. 2 (1995): 111–17. http://dx.doi.org/10.1002/jctb.280620202.

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18

Milillo, Lucrezia, Marei Hacke, Sara Norrehed, Ilaria Degano, Francesca Gherardi, and Ellinor Gunnarsson. "Heritage Science Contribution to the Understanding of Meaningful Khipu Colours." Heritage 6, no. 3 (2023): 2355–78. http://dx.doi.org/10.3390/heritage6030124.

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This work is the first scientific study of khipu dyes and inorganic mordants and auxiliaries, paving the way for a new approach to understanding khipus’ meaningful materiality, technology, and colours. Khipus have usually been described as “Andean knotted records”, but they are much more than complex knotted cords: a great part of the information encoded resides in khipus’ incredible colours. The objects of this study are two Wari khipus, 1932.08.0001 and 1932.08.0002, now at the Museum of World Culture in Gothenburg, Sweden. After a morphological study of the khipus, the objects were imaged with multiband imaging (MBI) as an aid for the sampling decisional process. The khipus were then analysed non-invasively by X-ray fluorescence (XRF) spectroscopy on selected areas of particular interest. The khipus were consequently sampled for elemental characterisation by micro-XRF, and liquid chromatography coupled with high-resolution mass spectrometry (HPLC–HRMS) for characterising the organic dye composition. This paper presents a part of the results of the project “Meaningful materials in the khipu code”, with the intent to shed light on the difficulties and possibilities of investigating khipu colours and dyestuffs. MBI and XRF revealed unforeseeable structural characteristics, such as remnants from a heavily degraded thread in an area of missing thread wrapping and a dual-coloured thread that was previously deemed single-coloured. The organic dyes identified by HPLC–HRMS comprised indigoids, cochineal, and an unknown flavonoid-based dyestuff. XRF of the inorganic components revealed associations of several elements with specific colours.

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19

Trovato, Valentina, Silvia Sfameni, Giulia Rando, et al. "A Review of Stimuli-Responsive Smart Materials for Wearable Technology in Healthcare: Retrospective, Perspective, and Prospective." Molecules 27, no. 17 (2022): 5709. http://dx.doi.org/10.3390/molecules27175709.

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In recent years thanks to the Internet of Things (IoT), the demand for the development of miniaturized and wearable sensors has skyrocketed. Among them, novel sensors for wearable medical devices are mostly needed. The aim of this review is to summarize the advancements in this field from current points of view, focusing on sensors embedded into textile fabrics. Indeed, they are portable, lightweight, and the best candidates for monitoring biometric parameters. The possibility of integrating chemical sensors into textiles has opened new markets in smart clothing. Many examples of these systems are represented by color-changing materials due to their capability of altering optical properties, including absorption, reflectance, and scattering, in response to different external stimuli (temperature, humidity, pH, or chemicals). With the goal of smart health monitoring, nanosized sol–gel precursors, bringing coupling agents into their chemical structure, were used to modify halochromic dyestuffs, both minimizing leaching from the treated surfaces and increasing photostability for the development of stimuli-responsive sensors. The literature about the sensing properties of functionalized halochromic azo dyestuffs applied to textile fabrics is reviewed to understand their potential for achieving remote monitoring of health parameters. Finally, challenges and future perspectives are discussed to envisage the developed strategies for the next generation of functionalized halochromic dyestuffs with biocompatible and real-time stimuli-responsive capabilities.

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20

Fitzpatrick, L. J., J. R. Dean, M. H. I. Comber, K. Harradine, K. P. Evans, and S. Pearson. "Pressurised liquid extraction of pentachlorophenol from dyestuffs and cotton." Journal of Chromatography A 873, no. 2 (2000): 287–91. http://dx.doi.org/10.1016/s0021-9673(99)01324-2.

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21

Murcia, Julie, Ángela Cely, Hugo Rojas, María Hidalgo, and José Navío. "Fluorinated and Platinized Titania as Effective Materials in the Photocatalytic Treatment of Dyestuffs and Stained Wastewater Coming from Handicrafts Factories." Catalysts 9, no. 2 (2019): 179. http://dx.doi.org/10.3390/catal9020179.

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In this study, commercial and lab-prepared TiO2 were modified by fluorination and platinum photodeposition; and the effect of these modifications over the physicochemical and photocatalytic properties of TiO2 was evaluated. It was found that F and Pt addition leads to the modification of the optical and textural properties of TiO2. The materials prepared were tested in the photocatalytic degradation of different organic dyestuffs such as methylene blue (MB) and methyl orange (MO); the degradation of commercial anilines employed in the staining of natural fibers was also evaluated. Photocatalysis was also studied in this work as an eco-friendly treatment of wastewater coming from handicrafts factories. In general it was observed that the effectiveness of the photocatalytic treatment strongly depends on the substrate to be degraded, thus, fluorinated and platinized commercial Titania (Pt-F-P25) showed the best photocatalytic performance in the MB and MO photodegradation and in contrast, in the case of the anilines the highest degradation was obtained over commercial TiO2 fluorinated (F-P25). These results can be explained by differences observed in the structure and in the adsorption of these dyestuffs over the photocatalysts surfaces. F-P25 photocatalyst also demonstrated to be the best material for the treatment of real wastewater coming from handicrafts factories.

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22

Bechtold, Thomas, Eduard Burtscher, Angelika Amann, and Ortwin Bobleter. "Alkali-stable iron complexes as mediators for the electrochemical reduction of dispersed organic dyestuffs." Journal of the Chemical Society, Faraday Transactions 89, no. 14 (1993): 2451. http://dx.doi.org/10.1039/ft9938902451.

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23

Takahashi, Nobuyuki, Toshihiro Nakai, and Yoshio Satoh. "Variation of organic halide formation potential of dyestuffs during ozonation and correlation with color." Ozone: Science & Engineering 21, no. 5 (1999): 487–500. http://dx.doi.org/10.1080/01919512.1999.10382887.

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24

Anliker, R., P. Moser, and D. Poppinger. "Bioaccumulation of dyestuffs and organic pigments in fish. Relationships to hydrophobicity and steric factors." Chemosphere 17, no. 8 (1988): 1631–44. http://dx.doi.org/10.1016/0045-6535(88)90212-3.

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25

Mirila, Diana Carmen, Mădălina-Ștefania Pîrvan, Nicoleta Platon, Ana-Maria Georgescu, Valentin Zichil, and Ileana Denisa Nistor. "Total Mineralization of Malachite Green Dye by Advanced Oxidation Processes." Acta Chemica Iasi 26, no. 2 (2018): 263–80. http://dx.doi.org/10.2478/achi-2018-0017.

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Abstract In this work, the advanced decomposition of organic dyestuffs used in food and textile industry, such as Malachite Green (MG), was investigated in the presence of a cationic catalyst montmorillonite (P1-PILCs) prepared by ion-exchange method. The obtained material was characterized by BET, FTIR and XRD. The effects of different variables such as: catalyst dose, catalyst/ozone dose, ozonation time and the pH on the mineralization of the synthetic dye were studied and optimal experimental conditions were ascertained. Compared with simple ozonation, the introduction of the catalyst greatly reduces the duration of the process to reach over 95% yield from 110 minutes to some seconds.

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26

Üzümcü, Memik Bünyamin, Esin Sarioğlu, Tülin Nacarkahya, Şeyma Satil, and Burak Sari. "ANALYZING THE EFFECT OF BLENDING RATIO AND SPINNING SYSTEM ON THE PROPERTIES OF BAMBOO/COTTON FABRICS DYED WITH ACORN DYESTUFF." Fibres and Textiles 32, no. 1 (2025): 48–52. https://doi.org/10.15240/tul/008/2025-1-009.

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In the context of sustainable development goals, a diverse array of contributing studies has emerged within the textile sector. It is evident that the majority of these studies encompass both legal and customer obligations. The objective of contemporary businesses is to manufacture products that demonstrate a high level of environmental sensitivity. For instance, the objective is to reduce the quantity of waste products, to achieve energy-efficient production, to minimize the amount of chemicals employed, to reduce water consumption, to utilize energy derived from renewable sources, and thus to diminish the carbon footprint. From an environmental standpoint, the chemicals utilized in textile product manufacturing have emerged as a significant consideration. It is preferable that the chemicals employed in the dyeing process (dyestuffs, bleaching agents, softeners, etc.) are environmentally sensitive. Furthermore, the use of organic dyes in the dyeing process is also employed as a means of obtaining a more sustainable product. In the context of this study, the production of bamboo/cotton yarn was conducted at varying blend ratios (67/33%, 50/50%, and 33/67%) through the use of three distinct production methods (open end, vortex, and ring systems). Single jersey knitted fabrics were produced using these yarns with the same production parameters. Subsequently, the fabrics were dyed using acorn natural dyestuff. Pilling, fastness and CIELab analyses were performed on the fabric samples, and the results were subjected to statistical analysis.

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27

Gluckman, Jennifer C., Karel Slais, Udo A. T. Brinkman, and Roland W. Frei. "Transitory mobile phase environments for rapid selectivity changes in liquid chromatography: application to organic dyestuffs." Analytical Chemistry 59, no. 1 (1987): 79–85. http://dx.doi.org/10.1021/ac00128a017.

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28

Mayhew, Hannah E., David M. Fabian, Shelley A. Svoboda, and Kristin L. Wustholz. "Surface-enhanced Raman spectroscopy studies of yellow organic dyestuffs and lake pigments in oil paint." Analyst 138, no. 16 (2013): 4493. http://dx.doi.org/10.1039/c3an00611e.

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29

Takahashi, Nobuyuki, and Tomoya Kumagai. "Ozonation of Dyestuffs and Intermediates and Further Decrease in Dissolved Organic Carbon by Post-Biodegradation." Ozone: Science & Engineering 28, no. 3 (2006): 141–47. http://dx.doi.org/10.1080/01919510600644633.

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30

Prabowo, H. RM Juddy, and Sarah Febrina Yolanda. "Analysis of the Leading Sector and the Effect to Regional Minimum Wage (UMSK): A Case Study in Cimahi City, Indonesia." ENDLESS : International Journal of Future Studies 3, no. 2 (2020): 64–96. http://dx.doi.org/10.54783/endless.v3i2.38.

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The purpose of this study was to analyze the leading sectors in the city of Cimahi and its influence on the regional minimum wage (UMSK) of the city of Cimahi. This research uses descriptive quantitative research. The data used is the Large and Medium Industry Statistical Data for 2011 to 2015. The leading sectors in Cimahi City in 2019 based on the 5 digit KBLI criteria, Large Business Scale, Added Value and Labor Productivity growth in the 2015 Large Industry data are 13131 Yarn Refinement Industry, 17019 Other Paper Industry, 13911 Knitted Fabric Industry, 20116 Basic Organic Chemistry Industry, Dyestuffs and Pigments, Dyes and Pigments, 25940 industrial Buckets, Cans, Drums, and Similar Containers of Metal, and 26310 Telephone and Facsimile Equipment Industry.

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31

Travis, Anthony S. "Science as Receptor of Technology: Paul Ehrlich and the Synthetic Dyestuffs Industry." Science in Context 3, no. 2 (1989): 383–408. http://dx.doi.org/10.1017/s0269889700000879.

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The ArgumentIn Germany during the 1870s and 1880s a number of important scientific innovations in chemistry and biology emerged that were linked to advances in the new technology of synthetic dyestuffs. In particular, the rapid development of classical organic chemistry was a consequence of programs in which chemists devised new theories and experimental strategies that were applicable to the processes and products of the burgeoning dye factories. Thereafter, the novel products became the means to examine and measure biological systems. This took place as a result of two trends. The first was a move toward diversification in the dye industry – made possible by the extensive range of products – which in turn was stimulated by economic and political conditions. The second was the increasing availability of techniques, substances, and processes used in industry. This made possible a concrete program of introducing the qualitative and quantitative methods of chemistry into the domain of laboratory experimentation on biological materials, thereby realizing the abstract desire to transform cell biology into an exact science.Moreover, the conceptualization of biological systems that emerged from this endeavor leaned heavily on a theory of dye chemistry that indicated which particular arrangements of atoms performed specific functions. This biological modeling used the imagery of chemical structural formulae to transform chemical nuclei and their side chains (substituents) into adequate representations of protoplasmic structure.

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32

Arslan, I., I. Akmehmet Balcioglu, and T. Tuhkanen. "Advanced treatment of dyehouse effluents by Fe(II) and Mn(II)-catalyzed ozonation and the H2O2/O3 process." Water Science and Technology 42, no. 1-2 (2000): 13–18. http://dx.doi.org/10.2166/wst.2000.0284.

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Treatment of synthetic dyehouse effluent containing six reactive dyestuffs and their assisting chemicals by O3/Fe(II), O3/Mn(II), and O3/H2O2 advanced oxidation processes was investigated. All oxidation processes were capable of completely decolourizing the wastewater within 30 min. Decolourization proceeded fastest by the O3/Mn(II) process, whereas the O3/H2O2 combination was more efficient in the removal of DOC (Dissolved Organic carbon) and UV254nm which were 11 and 53%, respectively, for one hour treatment time. Application of Fe(II)-catalyzed ozonation provided an effective means of removing colour and COD (Chemical Oxygen Demand) by a five- and nine-fold enhancement, respectively, compared with conventional coagulation applied at the same coagulant doses. Formation of toxic oxidation products was not observed during the course of treatment with all investigated advanced oxidation processes.

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33

Chen, Ye, Miao Tian, and Xupo Liu. "Supramolecular Self-Assembly Strategy towards Fabricating Mesoporous Nitrogen-Rich Carbon for Efficient Electro-Fenton Degradation of Persistent Organic Pollutants." Nanomaterials 12, no. 16 (2022): 2821. http://dx.doi.org/10.3390/nano12162821.

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The electro-Fenton (EF) process is regarded as an efficient and promising sewage disposal technique for sustainable water environment protection. However, current developments in EF are largely restricted by cathode electrocatalysts. Herein, a supramolecular self-assembly strategy is adopted for synthetization, based on melamine–cyanuric acid (MCA) supramolecular aggregates integrated with carbon fixation using 5-aminosalicylic acid and zinc acetylacetonate hydrate. The prepared carbon materials characterize an ordered lamellar microstructure, high specific surface area (595 m2 g−1), broad mesoporous distribution (4~33 nm) and high N doping (19.62%). Such features result from the intrinsic superiority of hydrogen-bonded MCA supramolecular aggregates via the specific molecular assembly process. Accordingly, noteworthy activity and selectivity of H2O2 production (~190.0 mg L−1 with 2 h) are achieved. Excellent mineralization is declared for optimized carbon material in several organic pollutants, namely, basic fuchsin, chloramphenicol, phenol and several mixed triphenylmethane-type dyestuffs, with total organic carbon removal of 87.5%, 74.8%, 55.7% and 54.2% within 8 h, respectively. This work offers a valuable insight into facilitating the application of supramolecular-derived carbon materials for extensive EF degradation.

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34

Mezzanotte, Valeria, Francesco Romagnoli, Baiba Ievina, et al. "LCA of Zero Valent Iron Nanoparticles Encapsulated in Algal Biomass for Polishing Treated Effluents." Environmental and Climate Technologies 26, no. 1 (2022): 1196–208. http://dx.doi.org/10.2478/rtuect-2022-0090.

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Abstract Research data produced within the CARIPLO IMAP and Perform Water 2030 projects were processed using the SimaPro software to carry out the Life Cycle Assessment according to ISO 14040-44 of an innovative process of treated effluents’ polishing. The study aims to evaluate the integration of a microalgae culture as a side-stream process into the baseline layout of a wastewater treatment plant to remove nitrogen from the supernatant of sludge centrifugation from an environmental perspective. In particular, the investigated system focuses on using the algal biomass produced as an organic matrix for encapsulating zero-valent iron nanoparticles to be used for the final refinement of the effluent. Zero-valent iron (ZVI) is a reactive metal and an effective reducing agent. It can be used to remove organic and inorganic pollutants (e.g., chlorinated organics, pharmaceuticals, metals, textile dyestuffs). The encapsulation of ZVI by hydrothermal carbonization (HTC) in a carbonaceous matrix allows for overcoming the problems related to its lack of stability, easy aggregation, and difficulty in separating the ZVI nanoparticles from the treated solution. The case study refers to Bresso wastewater treatment plant (Milan province, Northern Italy). The environmental performances of the study were assessed following the Life Cycle Impact Assessment methods IMPACT 2002+. According to the results, the new process integration does not affect the environmental performance of the WWTP, still implying a significant improvement in the removal of metals and micropollutants. In fact, due to the ability of ZVI nanoparticles to remove organic and inorganic pollutants, the outflowing load will be significantly reduced, which will improve the environmental performance of the entire Bresso wastewater treatment plant.

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Poronik, Ye M., M. P. Shandura, A. I. Tolmachev, and Yu P. Kovtun. "Improved method for preparation of dibenzocrown-containing 4H-pyran- 4-one and synthesis of merocyanine dyestuffs from it." Chemistry of Heterocyclic Compounds 45, no. 6 (2009): 666–71. http://dx.doi.org/10.1007/s10593-009-0332-5.

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Shen, Chenyu, Hongjian Liang, Ziyue Zhao, et al. "Mo-Doped LaFeO3 Gas Sensors with Enhanced Sensing Performance for Triethylamine Gas." Sensors 24, no. 15 (2024): 4851. http://dx.doi.org/10.3390/s24154851.

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Triethylamine is a common volatile organic compound (VOC) that plays an important role in areas such as organic solvents, chemical industries, dyestuffs, and leather treatments. However, exposure to triethylamine atmosphere can pose a serious threat to human health. In this study, gas-sensing semiconductor materials of LaFeO3 nano materials with different Mo-doping ratios were synthesized by the sol–gel method. The crystal structures, micro morphologies, and surface states of the prepared samples were characterized by XRD, SEM, and XPS, respectively. The gas-sensing tests showed that the Mo doping enhanced the gas-sensing performance of LaFeO3. Especially, the 4% Mo-doped LaFeO3 exhibited the highest response towards triethylamine (TEA) gas, a value approximately 11 times greater than that of pure LaFeO3. Meantime, the 4% Mo-doped LaFeO3 sensor showed a remarkably robust linear correlation between the response and the concentration (R2 = 0.99736). In addition, the selectivity, stability, response/recovery time, and moisture-proof properties were evaluated. Finally, the gas-sensing mechanism is discussed. This study provides an idea for exploring a new type of efficient and low-cost metal-doped LaFeO3 sensor to monitor the concentration of triethylamine gas for the purpose of safeguarding human health and safety.

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Boulton, A. John. "Alan Roy Katritzky. 18 August 1928 — 10 February 2014." Biographical Memoirs of Fellows of the Royal Society 61 (January 2015): 225–45. http://dx.doi.org/10.1098/rsbm.2015.0001.

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After a bright start, first in Oxford and then in Cambridge, Alan Katritzky’s scientific career was spent at the University of East Anglia in Norwich, where he became the founding Professor of Chemistry (1962) and at the University of Florida in Gainesville, USA, in the Kenan Chair of Chemistry from 1980 until his death in 2014. For more than 60 years he was a pioneer in the development of the field of heterocyclic chemistry. His work contributed much to the science that underpins the synthetic work of the modern pharmaceutical and agrichemical industries as well as that of dyestuffs and polymers. His research also touched other areas such as physical organic and polymer chemistry, organic reaction mechanisms, spectroscopy, chemical sensors, peptide synthesis, and reactions in water at high temperatures and pressures. Alan Katritzky worked with large cohorts of graduate students and research fellows drawn from across the globe. Their work was reported in nearly 2200 papers published in the primary scientific literature. He was also very active in the publishing field, writing and editing monographs and reviews, maintaining this prodigious level of output until a few days before he died.

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Singh, Tavneet K., Reese A. Grandy, Emma S. Dennis, Anja S. B. Schouten, and Bryan D. Koivisto. "Exploring Structure-Property Relationships in a Family of Ferrocene-Containing, Triphenylamine-Based Hybrid Organic Dyes." Applied Sciences 12, no. 12 (2022): 6001. http://dx.doi.org/10.3390/app12126001.

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In this work, a new family of triphenylamine-based dyes equipped with ferrocene (Fc)-containing donors have been synthesized, characterized, and studied within dye-sensitized solar cells (DSSC). With the objective of designing a redox-robust iron-containing dye that effectively sensitizes titania, a family of five structurally related dyes containing ferrocene were prepared. The physicochemical properties of all dyestuffs were studied using UV-Vis and electrochemical measurements. Different cross-coupling strategies resulted in the ability to modestly tune the Fc/Fc+ redox potentials of the dye. Despite the Fc-containing dyes having optoelectronic properties consistent with the non-ferrocene parent dye, the performance of the dyes in devices was dismal and decreased with the number of appended ferrocenes. While this finding was consistent with previous attempts to explore Fc-TPA DSSC dyes, our spectroelectrochemical data supports the hypothesis that the ferrocene component of the dye is oxidized by the electrolyte, ultimately decreasing the dye’s ability to be a suitable sensitizer. While these dyes are not suitable for DSSC applications, they might find applications in other photo-induced integrated devices where charge recombination is minimal.

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Grossenbacher, Hugo, Thomas Thurnheer, Daniel Zürrer, and Alasdair M. Cook. "Determination of sulphonated azo dyestuffs and their bacterial metabolites by high-performance liquid chromatography." Journal of Chromatography A 360 (January 1986): 219–23. http://dx.doi.org/10.1016/s0021-9673(00)91665-0.

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Stone, Derek W., Sarath M. Vega Gutierrez, Zielle M. Walsh, and Seri C. Robinson. "Preliminary Exploration of the Red Pigment from Scytalidium cuboideum as a Cellulosic Pulp Colorant." Challenges 13, no. 1 (2022): 15. http://dx.doi.org/10.3390/challe13010015.

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Pollution from the international dye industry continues to be a global problem. Biotechnology offers new options, including a closer look at select wood decay fungi to replace inorganic dyes. The pigments produced by a small group of soft rotting fungi are generally naphthoquinonic and remarkably stable. From this group, the dramada crystals, produced by Scytalidium cuboideum, are of particular interest. To test the application of this pigment as a natural colorant of cellulosic pulps, four different bleached pulps were selected (one hardwood, three softwood), in three different mediums (acetone, ethanol, and DI water). The pigment generated a significant change of color, but there was no significant difference in color intensity based on the solvent carrier. These preliminary results are promising as they open the door for further exploration of applications of fungal pigments in the paper industry. Once these pigments can be reliably grown, they will offer a sustainable organic alternative to polluting inorganic dyestuffs and help reduce the toxic effluent released into the soil and waterways.

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Hanna, M. A., M. F. El-Sherbiny, A. A. Al-Sarawy, and M. A. F. El-Sayed. "Simple Approach to Some New Arylazo Spiro Indoline-Based Dyes as Alternatives for Benzidine-Based Dyestuffs." Phosphorus, Sulfur, and Silicon and the Related Elements 182, no. 10 (2007): 2371–91. http://dx.doi.org/10.1080/10426500701498770.

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Sullivan, Anthony G., and Simon J. Gaskell. "The Analysis of Polysulfonated Azo Dyestuffs by Matrix-assisted Laser Desorption/Ionization and Electrospray Mass Spectrometry." Rapid Communications in Mass Spectrometry 11, no. 7 (1997): 803–9. http://dx.doi.org/10.1002/(sici)1097-0231(19970422)11:7<803::aid-rcm885>3.0.co;2-o.

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Degano, Mattonai, Sabatini, and Colombini. "A Mass Spectrometric Study on Tannin Degradation within Dyed Woolen Yarns." Molecules 24, no. 12 (2019): 2318. http://dx.doi.org/10.3390/molecules24122318.

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Natural tannins from various plants have been used throughout human history in textile dyeing, often as mordant dyes. The ageing behavior of these dyes is a challenge in conservation science, requiring a thorough knowledge of the textile–mordant-dye system. In this work, we analyzed reference wool yarns dyed with natural tannins from oak gallnuts, walnut (Juglans regia), and catechu (Acacia catechu), after artificial ageing. To gain insights on the composition of the dyestuffs and on how they aged, an analytical procedure based on extraction with Na2EDTA/DMF (ethylenediaminetetraacetic acid/dimethylformamide) and high-performance liquid chromatography (HPLC) analysis using high-resolution mass spectrometry detection was used. Since conventional reversed-phase (RP) columns usually show poor retention efficiency of highly polar compounds such as tannins, an RP-amide embedded polar group stationary phase was used to achieve optimal retention of the most polar compounds. Tannins from oak gallnuts showed little degradation after ageing, while a significant increase in the content of hydroxybenzoic acids was observed for tannins from walnut and catechu. Finally, the analytical procedure was applied to characterize the tannin dyes in historical tapestries from the 15th to 16th century, and the results were discussed in comparison with the reference yarns.

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Tseng, Chi-Shun, Tsunghsueh Wu, and Yang-Wei Lin. "Facile Synthesis and Characterization of Ag3PO4 Microparticles for Degradation of Organic Dyestuffs under White-Light Light-Emitting-Diode Irradiation." Materials 11, no. 5 (2018): 708. http://dx.doi.org/10.3390/ma11050708.

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Bisschops, I., A. B. dos Santos, and H. Spanjers. "Waste sizing solution as co-substrate for anaerobic decolourisation of textile dyeing wastewaters." Water Science and Technology 52, no. 1-2 (2005): 397–403. http://dx.doi.org/10.2166/wst.2005.0545.

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Dyeing wastewaters and residual size are textile factory waste streams that can be treated anaerobically. For successful anaerobic treatment of dyeing effluents, a co-substrate has to be added because of their low concentration of easily biodegradable compounds. Starch-based size contains easily biodegradable material, but is too concentrated to be treated without difficulties. Although residual size makes up only a small volume, when mixed with the other textile wastewater streams it has a considerable impact on the overall organic load. Many textile dyes can pass through a conventional aerobic treatment plant without being degraded. Anaerobic pre-treatment of the dyeing wastewaters before discharge to the aerobic plant can solve this problem, as many dyestuffs are partly degradable under anaerobic conditions, rendering aerobically degradable products. In this study, the possibility of using waste size as a co-substrate for the anaerobic pre-treatment of dyeing wastewaters was investigated. It was found that waste size was applicable as co-substrate for the decolourisation of the two textile dyeing wastewaters studied. Adding a redox mediator could enhance decolourisation rates for both wastewaters.

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Hanna, M. A., A. A. Al-Sarawy, I. G. Rashed, H. F. Elgamal, and F. K. M. Wali. "Anchored Synthesis for Some Novel Mono and Disarylazo 1,2,4-Benzothiadiazine-Based Dyestuffs as Alternatives for Benzidine-Based Dyes." Phosphorus, Sulfur, and Silicon and the Related Elements 181, no. 9 (2006): 2089–108. http://dx.doi.org/10.1080/10426500600605863.

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Serrano, Ana, Maarten van Bommel, and Jessica Hallett. "Evaluation between ultrahigh pressure liquid chromatography and high-performance liquid chromatography analytical methods for characterizing natural dyestuffs." Journal of Chromatography A 1318 (November 2013): 102–11. http://dx.doi.org/10.1016/j.chroma.2013.09.062.

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48

Putri, Reza Audina, Safni Safni, Diana Vanda Wellia, Upita Septiani, and Novesar Jamarun. "Degradasi Zat Warna Orange-F3R dan Violet-3B secara Sonolisis Frekuensi Rendah dengan Penambahan Katalis C-N-Codoped TiO2." Jurnal Kimia Valensi 5, no. 1 (2019): 35–43. http://dx.doi.org/10.15408/jkv.v5i1.7801.

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Zat warna orange-F3R dan violet-3B merupakan zat warna organik sintetis turunan vat yang bersifat non-biodegradable. Degradasi kedua zat warna ini telah dilakukan secara sonolisis dengan penambahan katalis semikonduktor TiO2 anatase yang didoping karbon dan nitrogen. Proses sonolisis menggunakan iradiasi ultrasonik dengan frekuensi 35 kHz. Massa katalis optimum yang diperoleh untuk sonolisis zat warna orange-F3R adalah 9 mg dan 6 mg untuk violet-3B. Persen degradasi meningkat secara signifikan dengan penambahan katalis yaitu dari 8.3% menjadi 36.2% untuk sonolisis zat warna orange-F3R selama iradiasi 180 menit. Sedangkan, dengan waktu iradiasi yang sama persen degradasi dari zat warna violet meningkat dari 5.8% menjadi 34.2% setelah penambahan katalis. Kata kunci: C-N-codoped TiO2, sonolisis, ultrasonik, vat Orange-F3R and violet-3B are non-biodegradable synthetic organic dyes. The degradation of these two dyestuffs has been done by sonolysis process with the addition of semiconductor TiO2 anatase catalyst which is doped by carbon and nitrogen atoms. The sonolysis process used ultrasonic irradiation with a frequency of 35 kHz. The optimum catalyst mass obtained for the orange-F3R dye sonolysis was 9 mg and 6 mg for violet-3B. The percentage of degradation increased significantly with the addition of the catalyst; it was from 8.3% to 36.2% for the orange-F3R dye during irradiation for 180 min. Meanwhile, by the same irradiation time, the degradation percentage of violet dye increased from 5.8% to 34.2% after the addition of the catalyst. Keywords: C-N-codoped TiO2, sonolysis, ultrasonic, vat-dye.

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Karuppasamy, K., P. Santhoshkumar, Tassawar Hussain, et al. "Influence of selenium precursors on the formation of iron selenide nanostructures (FeSe2): Efficient Electro-Fenton catalysts for detoxification of harmful organic dyestuffs." Chemosphere 272 (June 2021): 129639. http://dx.doi.org/10.1016/j.chemosphere.2021.129639.

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Pawlak, Katarzyna, Maria Puchalska, Agata Miszczak, Elżbieta Rosłoniec, and Maciej Jarosz. "Blue natural organic dyestuffs—from textile dyeing to mural painting. Separation and characterization of coloring matters present in elderberry, logwood and indigo." Journal of Mass Spectrometry 41, no. 5 (2006): 613–22. http://dx.doi.org/10.1002/jms.1018.

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