Dyes - Science topic

In this work, the electrochemical determination of clioquinol on the electrode, modified by the squaraine dye complex with copper sulfide nanoparticles, is described. The electroanalytical process begins with the analyte hydrolysis, followed by its hybrid oxidation by the pyridinic nitrogen atom and the hydroxyquinole moiety. The indirect electropo...

Nanomaterials have attracted significant attention as signal reporters for immunoassays. They can directly generate detectable signals or release a large number of signaling elements for readout. Among various nanolabels, nanomaterials composed of multiple signaling molecules have shown great potential in immunoassays. Generally, signaling molecule...

Dye molecules that are capable of self-assembling into aggregates show interesting collective optical properties, and numerous new applications are under discussion. All thin film systems described so far have shortcomings either in terms of reproducibility, stability or the rate of aggregate formation. A new, fast and reproducible method for the b...

The article materials are devoted to the hydro treating effects research, such as scouring and dyeing, on the elastic properties of the previously single jersey for a certain period of time and at the different temperatures by comparing the force necessary to lengthen the fabric by 80% of the original length and width after the process of fixing, s...

The demand for wastewater treatment for a sustainable future has provoked the development of an ecologically acceptable photocatalytic approach. However, exploration of highly efficient green metal free catalyst for photocatalytic dye degradation under normal light is yet challenging. In this work, the prepared sericin derived carbon quantum dots (...

Citation of the publication (our own previous work), Yaseen, M [...]

In this study, the activated carbon that was obtained from date seeds, after heating at 500 ºC, was used to remove methyl red dye from its aqueous solutions. Different parameters were applied including (the effect of dose, the effect of adsorption time, and the effect of pH value). The extent of dye removal increased with increasing adsorption time...

The global textile industry is a cornerstone of modern economies but remains a significant contributor to environmental degradation due to its water-intensive dyeing processes. Waterless dyeing techniques have emerged as transformative innovations that address the industry's sustainability challenges. This article explores the principles, applicati...

Radical‐featured organic materials usually demonstrate significantly narrower bandgap than that of regular organic materials, which is beneficial for near‐infrared (NIR) absorption and non‐radiative decay process, making them good candidates for photothermal agents (PTAs) of photothermal therapy (PTT). However, most organic radicals are too short‐l...

Metal‐free photosensitizers for the construction of low‐cost and eco‐friendly dye‐sensitized photoelectrochemical cells (DSPECs) have recently been greatly improved, but the optimization of water oxidation catalysts (WOCs) used in DSPECs based on metal‐free dyes has received little attention. Herein, a series of polymer networks (RuTPA, RuCz, RuPr...

Indocyanine green (ICG) is a diagnostic dye commonly used in medical imaging and liver function monitoring. Given its widespread use, there is a need for detailed evaluations of its adverse drug reactions in real-world settings. As the comprehensive overview of its safety profile is very limited, this study aimed to analyze the adverse events (AEs)...

This article discusses a comparative analysis based on a case study of the effectiveness of implementing the Internet of Things (IoT) in treating water contaminated with synthetic blue dye, using a technological artifact developed based on the Jar Test structure. In collaboration with the Chemistry course at Lauro Gomes Technical School, students c...

Studies using solvatochromic dyes appear to show that potencies have a polarising and structuring effect in solution. Taking these results further it can be predicted that on dissolution of solution structures, both heat and light should be emitted. It has been shown that a weak electric current passed through solutions of Antimonium crudum destroy...

The use of natural dyes for batik in recent years, apart from being a trend, has also become an alternative solution to the ongoing environmental issues. For specific crafter communities, natural dyes can be a challenge that raises new obstacles due to their special treatment compared to the easier synthetic dyes. Another concern is losing the dist...

Among all the organic compounds, heterocyclic compounds are the most common and varied class. It has been possible to synthesis a considerable number of heterocyclic molecules thus far. Heterocyclic compounds are getting more and more prevalent due to extensive synthetic study and their synthetic utility. In the realm of medical chemistry, these mo...

For the purpose of determining the characteristics of the Cyanidin-3-O-glucoside chloride (COGC) dye, both an FT-IR spectrometer and a UV–Visible spect rometer were employed through the process. At a wavelength of 473 nm, a diode-pumped solid-state (DPSS) laser with an adjustable wavelength was used to quantify the thermally induced optical nonline...

The LaMnO3 nanoparticles were successfully produced using the solution combustion method followed by calcination at 500 °C. Various spectroscopic techniques were utilized to analyze the nanoparticles and verify their surface characteristics and structural properties. X-ray diffraction studies confirmed that the synthesized LaMnO3 nanoparticles poss...

Dear Colleagues, We are thrilled to inform you that our Special Issue (SI) entitled “Latest Trends and Challenges in the Study of Pigments and Dyes and Their Degradation in Cultural Heritage Objects” has successfully published ten papers! For an overview of the published articles and details about the aims and scopes of the SI as well as submissio...

this is a very astonishing observation. 75-80% efficient FRET was measured for a gold QD being very close (1-2 nm) to the Jagg of DYE II in a counter layer. Therefore, electron transfer from Jaggs to quantum dots by tunneling would in principle be possible if reducing Jagg properties in the absence of light would help to prevent oxidation of QD-pro...

To explore better methods for tracing central lymph nodes in patients with papillary thyroid carcinoma by comparing the differences in the numbers and staining rates of central lymph nodes as well as the degree of nanocarbon extravasation between the preoperative ultrasound-guided injection of nanocarbon particles and the intraoperative injection o...

Sometimes, during the dyeing process of textile fabrics, some color variations and color spots occur, which considerably decrease the fabric quality. The problem of defective and uneven dyeing during textile processing generally involves a chemical stripping approach. The stripping efficiency of reactive dyes from cellulose fabric cannot be easily...

In this study, different concentrations of La³⁺-substituted NiO nanocatalysts were synthesized through a simple precipitation technique and characterized well with sophisticated instruments. The photocatalytic activity of the La-NiO-1.5% catalyst was substantially higher than that of pristine, 0.5%, 1%, and 2% La³⁺-substituted NiO samples for the d...

Stitch density is one of the critical quality parameters of knit fabrics. This parameter is closely related to other physical quality parameters like fabric weight, fabric tightness factor, fiber types, blend ratio, yarn diameter and linear density, and fabric structure. Selecting stitch density (wales per inch, course per inch) is essential to get...

The six-layered Aurivillius compound, Bi7Fe3Ti3O21 (BFT) ceramic, is renowned for its interesting dielectric properties. With a visible range energy band gap (~ 2.20 eV) and piezoelectric characteristics, it emerges as a promising candidate for both photocatalytic and piezocatalytic applications in the degradation of organic pollutants. The current...

This study investigates the influence of wave-absorbing materials on the heating efficiency of microwave treatment in the remediation of contaminated soil, with a focus on the Tiruppur taluk region. The area was selected due to the significant contamination of soil and water bodies, particularly the Noyyal River, resulting from the direct discharge...

Present-day liquid-state lasers are based on organic dyes. Here we demonstrate an alternative class of liquid lasers that use solutions of colloidal quantum dots (QDs). Previous efforts to realize such devices have been hampered by the fast non-radiative Auger recombination of multicarrier states required for optical gain. Here we overcome this cha...

The coupling of two-level quantum systems to the thermal environment is a fundamental problem, with applications ranging from qubit state preparation to spin models. However, for the elementary problem of the thermodynamics of an ensemble of bosons populating a two-level system despite its conceptual simplicity experimental realizations are scarce....

Red-emitting oxazine fluorophores are shown to bind to cucurbit[7]uril (CB[7]) with high affinity. Their fluorescence quantum yield and lifetime are thereby enhanced owing to shielding of the dyes from water....

Enormous amounts of toxic synthetic dyes and inorganic contaminants, such as heavy metals, are regularly discharged into local water bodies, unregulated and untreated, through effluents from a wide range of...

Obstetric fistula is a debilitating childbirth injury causing immense suffering for women and girls with the condition. The majority of fistulas can be successfully treated with a surgical repair, performed by a competent surgeon who has undergone specialist training and who works with a holistic fistula care team. As well as surgical repair, a cri...

Quantum dots (QDs) are semiconductor nanocrystals whose optical properties can be tuned by altering their size. By combining QDs with dyes we can make hybrid QD‐dye systems exhibiting energy transfer (ET) between QDs and dyes, which is important in sensing and lighting applications. In conventional QDs that need a shell to passivate surface defects...

Evaluation of the potential of Ascomycete fungi for textile dye decolorization using their extracellular lignolytic enzymes.

This study focuses on developing an ionic liquid-based emulsion membrane to remove a cationic dye from an aqueous solution. The researchers employed an emulsion liquid membrane (ELM) characterization method based on droplet sizes and membrane breakage rate to evaluate the impact of various parameters on dye extraction. The parameters investigated i...

Hello everyone, I am working on dye-sensitized solar cells. I am heating my TiO₂ paste prepared with 5% acetic acid at 450–500°C. However, the color does not change from yellow to white, and I remove it from the plate after a certain period. After cooling, I immerse it in the dye, but the dye does not adhere to the surface. The dye I am using is gr...

Sonohemical method for the degradation of toxic dyestuffs is now considered as a promising technique. An important dye namely Methylene Blue (MB) was degraded using ultrasound irradiation at different pH. The impact of various additives like CCl4, H2O2, NaCl and Na2SO4 with Original Research Article Islam et al.; Chem. Sci. Int. 81 different doses...

In this paper, Ti/Co3O4@NiZnNC composite photoelectrodes in the shape of flower clusters were prepared by combining a p-type semiconductor with a bimetallic organic skeleton by a two-step hydrothermal method and roasting method. The morphology of the electrodes was controlled by adjusting the amount ratio of Ni²⁺ and Zn²⁺, and the photocatalytic pe...

تم في هذا البحث تحضير صبغتين من بار-امينو فينول من خلال تفاعل ملح الديزونيوم من بارا-امينو فينول مع مركبين اروماتي (1-نفثول وبارا-امينو فينول). تم تشخيص الصبغتين الجديدتين (a و b ) بتقنية FTIR وHNMR1 مع قياس بعض الخواص الفيزيائية. تم دراسة النشاط التثبيطي تجريبياً بواسطة القياسات الكهروكيميائية لمركبات الآزو المحضرة ضد تآكل الفولاذ الكربوني نوع C45...

With the rapid development of information technology, the dissemination and preservation of traditional culture face new opportunities and challenges. This study aims to explore design strategies for a WeChat Mini Program focused on persimmon dyeing culture, to promote the inheritance and development of this intangible cultural heritage. Through us...

Oxygen indicators in food packaging can be used to monitor the shelf life and quality of the product, especially in a vacuum or modified atmosphere packaged, by sensing the indicator's color change. The mechanism of the oxygen indicator is a redox reaction which is compromised redox dye, reducing compound, and alkali compound. These substances can...

Post-labelling cleavable substrates for self-labelling protein tags, such as SNAP- and Halo-tags, can be used to study cell surface receptor trafficking events by stripping dyes from non-internalized protein pools. Since...

The efficient production of hydrogen peroxide (H2O2) solution was achieved by combining cathodic two‐electron oxygen reduction (2e⁻ ORR) and anodic two‐electron water oxidation (2e⁻ WOR) in two half‐reaction cells. h‐BN loaded on carbon fibers (h‐BN@C) is prepared and employed as an anode material to catalyze 2e⁻ WOR, while sulfonated commercial BP...

Fluorophores are essential tools for optical imaging and biomedical research. Their synthetic modification to incorporate new functions, however, remains a challenging task. Conventional strategies rely on linear synthesis in which a parent framework is gradually extended. We here designed and synthesized a versatile library of multi‐functional flu...

CuO, WO3 and CuO/WO3 composite catalysts were synthesized by using a sol–gel technique. The as-prepared catalyst nanoparticles were characterized by using FTIR, XRD, FESEM, fluorescence spectroscopy and UV–Vis absorbance spectroscopy. FTIR and XRD analyzes showed that CuO and WO3 nanoparticles were successfully synthesized. FESEM images revealed ho...

Optical regulation of transcription using chemical compounds is an effective strategy to manipulate gene expression spatiotemporally. Conventional caging approaches with photoremovable protecting groups may require intense UV‐light exposure and release potentially toxic byproducts. To address these problems, here we developed a light‐mediated trans...

The optical limiter properties of R6G dye in acetone solution were studied, at different concentrations and thickness using Nd:YAG laser at a wavelength (532) nm. The optical limiter measurements were characterized by measuring the intensity of the medium using the optical limiter system. Optical limiting characteristics of the dye at various conce...

Self-organized branching structures can emerge spontaneously as interfacial instabilities in both simple and complex fluids, driven by the interplay between bulk material rheology, boundary constraints, and interfacial forcing. In our experiments, injecting dye between a source and a sink in a Hele-Shaw cell filled with a yield-stress fluid reveals...

The study consists of adsorption tests on two samples of biochar, obtained from rice husk and coconut fiber biochar biomass, as well as a sample of charcarbon, both prepared under different conditions: macerated and non-macerated; impregnation with and without HCl and H3PO4; and washing or not with deionized water after impregnation. The test was p...

In this paper, the spherical Fe-C micro-electrolysis materials (Fe-C MEM) were prepared using iron powder, activated carbon powder, corn straw, and bentonite as the raw materials. The preparation conditions optimized by single factor test showed Fe-C MEM had a high crystal violet removal and strength under 1:1 of Fe/C ratio, 2% corn straw content,...

In the context of chiral π‐conjugated materials, the use of enantiopure alkylthio appendages represents a valid alternative to conventional alkoxy groups: sulphur atom is bigger and more electron‐rich than oxygen, thus allowing for higher polarizability, greater flexibility, larger bulkiness and lower structural anisotropy. In light of these consid...

A novel BiOCl/Co catalyst was constructed by in situ doping of metal Co nanoparticles on n-type BiOCl nanosheets. The percentage of metal Co incorporated in the photocatalysts was adjusted to improve the degradation performance of the new catalysts against pollutants. The optimized BiOCl/Co achieved up to 95.5% photocatalytic degradation efficiency...

A indústria têxtil é considerada uma grande geradora de impactos ambientais por meio de seu lançamento de efluentes. Opções voltadas à preservação ambiental vem sendo estudadas com o objetivo de reduzir insumos químicos e recursos hídricos. O presente estudo apresenta a possibilidade de substituição de parte da água por óleo de soja em processos de...

Plasmonic nanolasers, which are promising coherent light sources for integrated photonics, super‐resolution imaging, and ultrasensitive sensing applications, face the challenge of high thresholds due to inherent losses in plasmonic nanocavities. While considerable efforts have been made to improve the Q factor, typically quantified by the full widt...

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