Colorants最新文献_第5页

Mathematical Approach to Optimizing the Panchromatic Absorption of Natural Dye Combinations for Dye-Sensitized Solar Cells 优化染料敏化太阳能电池天然染料组合全色吸收的数学方法

Colorants Pub Date : 2023-03-02 DOI: 10.3390/colorants2010007

Noah Manz, P. Fuierer

引用次数: 0

The Crosslinking and Porosity Surface Effects of Photoetching Process on Immobilized Polymer-Based Titanium Dioxide for the Decolorization of Anionic Dye 固定化聚合物基二氧化钛在阴离子染料脱色中的光蚀刻交联和孔隙表面效应

Colorants Pub Date : 2023-02-17 DOI: 10.3390/colorants2010006

Siti Raihan Hamzah, Muhammad Afiq Rosli, Nadiah Sabihah Natar, Nureel Imanina Abdul Ghani, Nur Aien Muhamad, M. Azami, M. Ishak, R. Nordin, W. I. Nawawi

{"title":"The Crosslinking and Porosity Surface Effects of Photoetching Process on Immobilized Polymer-Based Titanium Dioxide for the Decolorization of Anionic Dye","authors":"Siti Raihan Hamzah, Muhammad Afiq Rosli, Nadiah Sabihah Natar, Nureel Imanina Abdul Ghani, Nur Aien Muhamad, M. Azami, M. Ishak, R. Nordin, W. I. Nawawi","doi":"10.3390/colorants2010006","DOIUrl":"https://doi.org/10.3390/colorants2010006","url":null,"abstract":"The textile industry is suffering a great challenge regarding wastewater management, primarily due to the implementation of improper systems, specifically for dye wastewater treatment. Photocatalysis is one of approaches that have been used to treat wastewater. Titanium dioxide (TiO2) was immobilized by using the dip-coating technique in this research. Epoxidized natural rubber (ENR) and polyvinyl chloride (PVC) were used as a polymer to bind the TiO2 on the glass substrate. This immobilized TiO2/ENR/PVC underwent a photoetching process at various times to study the crosslink and porosity formations. Reactive red 4 dye was used as a model pollutant for photocatalytic performance. All immobilized TiO2/ENR/PVC samples under 12, 24 and 30 h of photoetching process (TEP12, TEP24 and TEP30 samples, respectively) showed higher photocatalytic activity compared to those without photoetching process (TEP0 sample) due to the intermediate charge in crosslinking reaction after the photoetching process. The TEP24 sample showed the highest photocatalytic degradation; light harvesting; photocatalytic degradation.","PeriodicalId":10539,"journal":{"name":"Colorants","volume":"63 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84991532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

pH-Induced Orthogonal Photoresponse of trans-Chalcone Isomers and Related Compounds in Equilibria ph诱导的反式查尔酮异构体及其相关化合物的正交光响应

Colorants Pub Date : 2023-02-17 DOI: 10.3390/colorants2010005

Jeonghee Kang, Ketevan Basilashvili, B. Yoo, Jong I. Lee

{"title":"pH-Induced Orthogonal Photoresponse of trans-Chalcone Isomers and Related Compounds in Equilibria","authors":"Jeonghee Kang, Ketevan Basilashvili, B. Yoo, Jong I. Lee","doi":"10.3390/colorants2010005","DOIUrl":"https://doi.org/10.3390/colorants2010005","url":null,"abstract":"Photoresponsive molecular devices can be a valuable tool to promote chemical changes in response to multiple signals, such as photons and pH, to deliver drugs or to detect physiological conditions in vivo. For example, trans-chalcones (Ct) from 4′-hydroxyflavylium (F1) and 7-hydroxyflavylium (F2) can undergo cis-trans isomerization by photoreaction into many different structures. The isomerization takes place at a slow rate in response to pH change; however, it can be done in seconds by photoreaction. In the investigation, as confirming the previous reports, 3-(2-hydroxy-phenyl)-1-(4-hydroxy-phenyl)-propenone, the trans-chalcone (CtF1) from F1, produces flavylium ions in pH = 1–4.5. Then, we further discovered that the flavylium quickly releases protons to yield the corresponding quinoidal base (A) in a solution of pH = 5.2 during irradiation with 350 nm. Meanwhile, the photolysis of 3-(2,4-dihydroxy-phenyl)-1-phenyl-propenone, the trans-chalcone (CtF2) from F2 at pH = 5.6, induces photoacid behavior by losing a proton from the trans-chalcone to generate Ct2−. The different outcomes of these nearly colorless chalcones under similar pH conditions and with the same photochemical conditions can be useful when yielding colored AH+, A, or Ct2− in a mildly acidic pH environment with temporal and spatial control using photochemical means.","PeriodicalId":10539,"journal":{"name":"Colorants","volume":"111 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76078224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Non-Invasive On-Site pXRF Analysis of Coloring Agents of Under- and Over-Glazes: Variability and Representativity of Measurements on Porcelain 下釉和上釉着色剂的无创现场pXRF分析:瓷器测量的可变性和代表性

Colorants Pub Date : 2023-02-01 DOI: 10.3390/colorants2010004

Jacques Burlot, X. Gallet, Gulsu Simsek Franci, L. Bellot‐Gurlet, P. Colomban

引用次数: 4

Azaphilones Pigments from the Fungus Penicillium hirayamae 平山青霉中的氮氮酚类色素

Colorants Pub Date : 2023-01-25 DOI: 10.3390/colorants2010003

Coralie Pavesi, V. Flon, G. Genta‐Jouve, E. Pramil, A. Escargueil, Adeel Nasir, T. Montier, X. Franck, Soizic Prado

引用次数: 1

N-Annulation of the BTI Rylene Imide Organic Building Block: Impact on the Optoelectronic Properties of π-Extended Molecular Structures BTI苯乙烯酰亚胺有机构建块的n -环化:对π扩展分子结构光电性能的影响

Colorants Pub Date : 2022-12-30 DOI: 10.3390/colorants2010002

J. A. Andrés Castán, S. Abidi, Tatiana Ghanem, S. Touihri, P. Blanchard, G. Welch, Yulian Zagranyarski, J. Boixel, Bright Walker, P. Josse, C. Cabanetos

引用次数: 1

Andy Warhol and His Amazing Technicolor Shoes: Characterizing the Synthetic Dyes Found in Dr. Ph. Martin’s Synchromatic Transparent Watercolors and Used in À la Recherche du Shoe Perdu 安迪·沃霍尔和他惊人的彩色鞋子:在马丁博士的同步透明水彩画中发现的合成染料的特征，并用于À la Recherche du Shoe Perdu

Colorants Pub Date : 2022-12-22 DOI: 10.3390/colorants2010001

Abed Haddad, Toni Nakie-Miller, J. Jenks, G. Kowach

{"title":"Andy Warhol and His Amazing Technicolor Shoes: Characterizing the Synthetic Dyes Found in Dr. Ph. Martin’s Synchromatic Transparent Watercolors and Used in À la Recherche du Shoe Perdu","authors":"Abed Haddad, Toni Nakie-Miller, J. Jenks, G. Kowach","doi":"10.3390/colorants2010001","DOIUrl":"https://doi.org/10.3390/colorants2010001","url":null,"abstract":"Synthetic organic dyes were extensively used by artists in the first half of the 20th century, knowingly or otherwise. This included Andy Warhol and his À la Recherche du Shoe Perdu (c. 1955), a major portfolio of hand-colored prints, a copy of which resides in the collection of The Museum of Modern Art (MoMA). Warhol and his friends were known to use Dr. Ph. Martin’s Synchromatic Transparent Water Colors to bring these prints to life. A historical set of Synchromatic Transparent Watercolors were initially investigated by UV-visible spectroscopy, and samples from the historic set were also characterized by µ-Fourier transform infrared spectroscopy for fingerprint identification. To better elucidate the nature of the mixtures present, thin-layer chromatography was coupled with surface-enhanced Raman spectroscopy to separate the components of all colorants in the set. The dyes decisively identified include Acid Red 73, Acid Red 87, Acid Red 17, Acid Red 103, Basic Red 1, Acid Orange 7, Acid Yellow 23, Acid Green 1, Basic Green 4, Acid Blue 3, Acid Blue 93, Basic Violet 3, Basic Violet 10, Basic Violet 17, and Acid Black 2. Overall, Acid Blue 3, along with Acid Orange 7 and Acid Black 2, were found in the greatest number of dyes in the Dr. Ph. Martin’s set. Data from the historic set was subsequently used for direct comparison with reflectance spectra from the Warhol portfolio using principal component analysis. Microfade testing on a Synchromatic Transparent Watercolors brochure was also conducted to identify fugitive colorants, the results of which were extrapolated to each of the prints in the Warhol portfolio. The analysis provided further insight into the dyes used in À la Recherche du Shoe Perdu and confirmed the extreme light sensitivity of some colorants and the fastness of others.","PeriodicalId":10539,"journal":{"name":"Colorants","volume":"62 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84047936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pigments and Inks Applied in Juan Vespucci’s Portolan Chart (1520) 胡安·韦斯普奇(Juan Vespucci)的《Portolan Chart》中使用的颜料和墨水(1520年)

Colorants Pub Date : 2022-12-07 DOI: 10.3390/colorants1040026

A. Križnar, F. Ager, Luis Robles Macías, Inés Ortega Feliu, B. G. Tubío, M. A. Respaldiza

{"title":"Pigments and Inks Applied in Juan Vespucci’s Portolan Chart (1520)","authors":"A. Križnar, F. Ager, Luis Robles Macías, Inés Ortega Feliu, B. G. Tubío, M. A. Respaldiza","doi":"10.3390/colorants1040026","DOIUrl":"https://doi.org/10.3390/colorants1040026","url":null,"abstract":"Not many manuscript maps have been the object of material analysis so far. A portolan chart, signed and dated by Juan Vespucci in 1520, was studied in this research, conserved at the Archivo General de Indias in Seville (Spain). It is made on parchment and depicts the coasts and islands of Europe and Africa. It is the oldest portolan chart made in Seville, being unusual in applying hand stamp for decorative figures. The map was analysed by different non-invasive techniques: infra-red and ultraviolet light, digital microscope and X-ray fluorescence (XRF). The main goals of this study were to identify the materials used, as well as to detect retouching or restoration work. Results showed that the entire parchment was first covered with a white layer made of lead white (Pb), calcite or gypsum (Ca). The principal pigments used were vermilion (Hg), yellow ochre (Fe), azurite (Cu) and a copper-based green pigment (Cu) and carbon black. The letters were probably written with an iron-gall ink (Fe, Cu). Very thin golden leaves were applied on a mixtion glue for gilded wind roses. Several retouches from the 19th/20th centuries were found using zinc and titanium whites and probably cobalt blue.","PeriodicalId":10539,"journal":{"name":"Colorants","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78729971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Tackling Colorants Sustainability Combining Disruptive Science and Sustainable Leadership: A Review Article 结合颠覆性科学和可持续领导解决着色剂的可持续性:一篇综述文章

Colorants Pub Date : 2022-11-26 DOI: 10.3390/colorants1040025

Valentina Lorenzon, G. Faccio

引用次数: 0

Selected Aspects of Forensic Discrimination of Blue and Black/Grey Cotton Fibres Derived from Denim Fabrics 从牛仔织物中提取的蓝色和黑色/灰色棉纤维的司法鉴定的若干方面

Colorants Pub Date : 2022-10-29 DOI: 10.3390/colorants1040024

P. Gora, J. Wąs-Gubała

{"title":"Selected Aspects of Forensic Discrimination of Blue and Black/Grey Cotton Fibres Derived from Denim Fabrics","authors":"P. Gora, J. Wąs-Gubała","doi":"10.3390/colorants1040024","DOIUrl":"https://doi.org/10.3390/colorants1040024","url":null,"abstract":"Fragments of single textile fibres are one of the most commonly found microtraces at crime scenes. Among them, the widespread blue and black/grey cotton fibres should be recognized. The analytical methods routinely used in fibre examination mainly focus on color assessment and determination of the fibres’ morphological features as well as chemical composition. This publication presents the physicochemical characteristics of blue and black/grey denim fabrics and fibres as well as an overview of the non-destructive and destructive methods used in the discrimination of these fibres. Usually, such fibre microtraces are very difficult to distinguish in forensic examinations due to their widespread abundance, and, thus, their evidential value is not significant. As previous research shows, most denim material samples were colored with indigo dye. However, due to the changing trends in denim production and the fashion market, indigo derivatives may play a more critical role. The literature review shows significant shortcomings in the development of techniques focusing on the analysis of the dyes contained in denim fibres, and this is a research direction worth pursuing.","PeriodicalId":10539,"journal":{"name":"Colorants","volume":"330 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86779954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0