Relevant bibliographies by topics / Organic dyes

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Organic dyes'

Author: Grafiati
Published: 4 June 2021
Last updated: 25 May 2024

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Journal articles on the topic "Organic dyes"

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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 (June 13, 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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Kuznetsov, Dmitry N., Konstantin I. Kobrakov, Anna G. Ruchkina, and Galina S. Stankevich. "BIOLOGICALLY ACTIVE SYNTHETIC ORGANIC DYES." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 60, no. 1 (March 1, 2017): 4. http://dx.doi.org/10.6060/tcct.2017601.5423.

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For citation:Kuznetsov D.N., Kobrakov K.I., Ruchkina A.G., Stankevich G.S. Biologically active synthetic organic dyes. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2017. V. 60. N 1. P. 4-33.This review is based on the publications found in CAS (Chemical Abstracts Service) database available from STN (The Scientific and Technical Information Network) with respect to dyes, and the compounds that can be classified as the dyes molecular variants. The substances were categorised based on the dyes chromophore properties. Special care was taken to determine the “composition - property” profile within the range of structurally similar compounds. An extensive list of literature references is provided to support the review's subject, including the authors’ own studies on the synthesis, properties and applications of coloured biologically active compounds. The view covers the uses of coloured biologically active compounds as textile dyes and the uses in other industries such as medical, agricultural etc. The review is substantially focused on biocidal azo dyes for the reason of the great variety of possible diazo and azo components which are used for the synthesis of dyes to create an abundance of biocidal dyes with a wide scale of colors. Usage of dyes which add expressed biocidal properties to the coloured textile and other materials and make them resistent to physical and chemical agents is a subject of obvious practical interest, as this enables the combination of two manufacturing processes in one step: coloration and special chemical treatment. Moreover, as it appears from the review, biocidal dyes may be used as additives to the primary dye, without affecting the colour of the object being dyed, albeit in quantities sufficient to endow the required biocidal properties. As demonstated by the review, streamlined synthesis of textile dyes exhibiting biocidal properties, which are able to make a material resistent to biodeterioration or add medicinal properties to the material, is hard to accomplish due to the lack of profound understanding of the mode of action of such compounds. However, the available “composition - property” data and the computer-aided screening data of the biological activity of organic compounds allow us to model and synthesise target products with a high degree of confidence. The review doesn’t cover the properties of biocidal dyes derived from natural raw materials.
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Zhang, Guang Xian, Ling Zhong, Feng Xiu Zhang, Xu Ting Xue, Ming Lu, Hui Zheng, and Da Yang Wu. "Dyeing Acceleration Theory of Molecule Companion on Silk with Reactive Dyes." Advanced Materials Research 549 (July 2012): 70–73. http://dx.doi.org/10.4028/www.scientific.net/amr.549.70.

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In this paper, a novel high efficient dyeing acceleration theory of molecule companion(DATMC) on silk with reactive dyes was invented and studied. Organic cations were used as accelerants to company reactive dyes to dye on silk, and the dyed silk was washed with anionic surfactant. The results showed that the dye-uptake rates were very high, nearly 100%. But if the carbon atom number of hydrophobic hydrocarbon chain of organic cation was equal to or more than 12, the organic cation would affect the fixation reaction of reactive dye on silk. On the contrary, if it was equal to or less than 8, the fixation reaction would be accelerated. The fixation rates were 98.10% and 98.48% with octyl trimethyl ammonium bromide(OTAB) and hexyl butyl dimethyl ammonium bromide(HBDAB) as accelerants, respectively. The fastnesses of dyed silk were 4-5, and the silk could be dyed uniformly if the accelerant was added in several times.
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Hosseinnezhad, Mozhgan. "A series of new organic sensitisers for dye-sensitised solar cells." Pigment & Resin Technology 45, no. 4 (July 4, 2016): 234–39. http://dx.doi.org/10.1108/prt-02-2015-0015.

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Purpose Dye-sensitised solar cells (DSSCs) have attracted a great deal of interest. Dye molecules are key materials in DSSCs that produce electrons. This study reports on synthesis of the organic dyes and investigation their performance in DSSCs. Design/methodology/approach A series of new organic dyes were prepared using double rhodanine as the fundamental electron-acceptor group and aldehydes with varying substituents as the electron-donor groups. These dyes were first purified and then characterised by analytical techniques. DSSCs were fabricated to determine the photovoltaic behaviour and conversion efficiency of each individual dye. Findings Results demonstrated that all the dyes form j-type aggregates on the nano TiO2. All dyes in DSSC structure show suitable power conversion efficiency, and Dye 5 due to presence of OCH3 and OiPr presents maximum conversion efficiency. Practical implications In the search for high-efficiency organic dyes for DSSCs, development of new materials offering optimised photochemical stabilities as well as suitable optical and electrical properties is importance. Social implications Organic dyes as photosensitisers are interesting due to low cost, relatively facile dye synthesis and capability of easy molecular tailoring. Originality/value A series of new organic metal-free dyes were prepared as sensitisers for DSSCs for the first time.
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Li, Qianqian, Zhongxing Jiang, Jingui Qin, and Zhen Li. "Heterocyclic-Functionalized Organic Dyes for Dye-Sensitized Solar Cells: Tuning Solar Cell Performance by Structural Modification." Australian Journal of Chemistry 65, no. 9 (2012): 1203. http://dx.doi.org/10.1071/ch12126.

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Due to their high conversion efficiency and low cost of production, dye-sensitized solar cells based on organic dyes have attracted considerable attention. By utilizing various heterocycles as construction blocks for organic dyes, the performance of solar cells was optimized to exhibit good light-harvesting features and suppress interfacial recombinations. The aim of this review is to highlight recent progress in the molecular design of heterocyclic-functionalized organic dyes for efficient dye-sensitized solar cells, and special attention has been paid to the relationship between chemical structure and the photovoltaic performance of dye-sensitized solar cells based on these dyes.
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Gharanjig, Kamaladin, and Mozhgan Hosseinnezhad. "Effect of substituents moiety in organic sensitiser based on carbazole on the performance of nanostructure dye-sensitised solar cells." Pigment & Resin Technology 44, no. 5 (September 7, 2015): 292–99. http://dx.doi.org/10.1108/prt-09-2014-0077.

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Purpose – The purpose of this paper is to prepare new organic dyes and use them as sensitisers in dye-sensitised solar cells. These dyes were synthesised and purified and then characterised by analytical techniques. Spectrophotometric evaluations of the prepared dyes were carried out in solution and on a nano-anatase TiO2 substrate to assess the possible changes in the status of the dyes in different environments. Finally, the photovoltaic properties were investigated in dye-sensitised solar cells. Design/methodology/approach – So as to synthesise dyes, N-substituents carbazole were utilised as the fundamental electron donor group and cyanoacrylic acid or acrylic acid as electron acceptor anchoring groups. Purified dyes were dissolved in solution and coated on TiO2 substrate. Finally, dye-sensitised solar cells were fabricated to determine the photovoltaic behaviour and conversion efficiency of each individual dye. Findings – The results showed that the dyes form j-type aggregates on the nano TiO2. The oxidation potential of synthesised carbazole dyes is > 0.2 V vs Fc/Fc+; hence, their high performance in dye-sensitised solar cells. Dye 3 exhibited 2.11 per cent of conversion efficiency in comparison to 2.89 per cent for the identical cells with Dye 9 containing cyanoacrylic acid which acted as the best acceptor group. Practical implications – The novel dyes look as promising as highly light fast, efficient dyes for dye-sensitised solar cells. Social implications – Organic dye provides low cost and less hazardous materials for dye-sensitised solar cells. Originality/value – A series of new organic dyes were synthesised as sensitisers for dye-sensitised solar cells for the first time.
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Wang, Guowei, and Hefa Cheng. "Application of Photocatalysis and Sonocatalysis for Treatment of Organic Dye Wastewater and the Synergistic Effect of Ultrasound and Light." Molecules 28, no. 9 (April 25, 2023): 3706. http://dx.doi.org/10.3390/molecules28093706.

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Organic dyes play vital roles in the textile industry, while the discharge of organic dye wastewater in the production and utilization of dyes has caused significant damage to the aquatic ecosystem. This review aims to summarize the mechanisms of photocatalysis, sonocatalysis, and sonophotocatalysis in the treatment of organic dye wastewater and the recent advances in catalyst development, with a focus on the synergistic effect of ultrasound and light in the catalytic degradation of organic dyes. The performance of TiO2-based catalysts for organic dye degradation in photocatalytic, sonocatalytic, and sonophotocatalytic systems is compared. With significant synergistic effect of ultrasound and light, sonophotocatalysis generally performs much better than sonocatalysis or photocatalysis alone in pollutant degradation, yet it has a much higher energy requirement. Future research directions are proposed to expand the fundamental knowledge on the sonophotocatalysis process and to enhance its practical application in degrading organic dyes in wastewater.
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Yu, Yingjie, and Rencheng Tang. "Dyeing of Tussah Silk with Reactive Dyes: Dye Selection, Dyeing Conditions, Dye Fixation Characteristics, and Comparison with Mulberry Silk." Molecules 29, no. 5 (March 5, 2024): 1151. http://dx.doi.org/10.3390/molecules29051151.

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Tussah silk is one of the most widely used wild silks. It is usually dyed with acid dyes, despite the shortcoming of poor wet fastness. Reactive dyeing is a good solution to this problem. In our work, sulfatoethylsulfone (SES), sulfatoethylsulfone/monochlorotriazine (SES/MCT), monochlorotriazine (MCT), and bis(monochlorotriazine) (Bis(MCT)) dyes were used to dye tussah silk. All of these dyes showed lower exhaustion and fixation on tussah silk than on mulberry silk under alkaline conditions. Among them, SES dyes were more applicable, with a fixation of 70–85% (at 4%owf dye) at 90 °C when using sodium bicarbonate as an alkali. SES dyes also showed a rapid fixation speed. The dyeing of tussah silk required lower sodium bicarbonate dosage, the use of more neutral electrolytes, and a higher dye quantity to achieve deep effects compared to mulberry silk. Dyed tussah silk displayed lower apparent color depth and brilliance than dyed mulberry silk. The neutral boiling dyeing of tussah silk with SES dyes exhibited higher exhaustion, higher fixation (82–92% at 4%owf dye), and a slower fixation speed compared with alkaline dyeing. Furthermore, in this dyeing method, SES dyes showed higher and more efficient fixation on tussah silk than on mulberry silk. All dyed tussah silk had excellent color fastness to soaping.
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Hardani, Hardani, Hendra Hendra, Muh Iman Darmawan, C. Cari, and Agus Supriyanto. "Fabrication of dye natural as a photosensitizers in dye-sensitized solar cells (DSSC)." Journal of Theoretical and Applied Physics 1, no. 1 (February 7, 2017): 21. http://dx.doi.org/10.20961/jotap.v1i1.4704.

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<p class="Abstract">The purpose of this study was to obtain optical properties (absorption spectrum) and electrical properties (photoconductivity) of organic dyes in DSSC performance. optical and electrical properties were tested by using UV-Visible Spectrophotometer and Elkahfi 1601 PC 100 / IV meter, respectively, while Keithley Type 2600A is used for the characterization of DSSC. This study is a great base to explore and investigate the development of DSSC solar cells using natural dyes (organic). Spectra optimal absorption and photoconductivity produced by natural dyes (organic). The results of this study indicate that the absorption spectrum of natural dyes (organic) in the range of 300-500 nm. electrical characteristics (I-V) of the increase in linear dye under illumination. I-V characteristics of DSSC from organically produced natural dyes to color the biggest-mangosteen obtained Voc of 565 mV; JSC = 1.52 A / m2; FF = 0.12; and η_ef is approximately 0.09%, respectively,. The conclusion of this study, natural dyes (organic) can be an attractive alternative as a dye.</p>
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Hardani, Hardani, Hendra Hendra, Muh Iman Darmawan, C. Cari, and Agus Supriyanto. "Fabrication of dye natural as a photosensitizers in dye-sensitized solar cells (DSSC)." Journal of Physics: Theories and Applications 1, no. 1 (March 8, 2017): 21. http://dx.doi.org/10.20961/jphystheor-appl.v1i1.4704.

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<p class="Abstract">The purpose of this study was to obtain optical properties (absorption spectrum) and electrical properties (photoconductivity) of organic dyes in DSSC performance. optical and electrical properties were tested by using UV-Visible Spectrophotometer and Elkahfi 1601 PC 100 / IV meter, respectively, while Keithley Type 2600A is used for the characterization of DSSC. This study is a great base to explore and investigate the development of DSSC solar cells using natural dyes (organic). Spectra optimal absorption and photoconductivity produced by natural dyes (organic). The results of this study indicate that the absorption spectrum of natural dyes (organic) in the range of 300-500 nm. electrical characteristics (I-V) of the increase in linear dye under illumination. I-V characteristics of DSSC from organically produced natural dyes to color the biggest-mangosteen obtained Voc of 565 mV; JSC = 1.52 A / m2; FF = 0.12; and η_ef is approximately 0.09%, respectively,. The conclusion of this study, natural dyes (organic) can be an attractive alternative as a dye.</p>
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Dissertations / Theses on the topic "Organic dyes"

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Qin, Peng. "The study of organic dyes for p-type dye-sensitized solar cells." Doctoral thesis, KTH, Organisk kemi, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-24406.

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This thesis concerns the study of D–π–A type dyes as sensitizers for NiO-based p-type dye-sensitized solar cells. The focus has been on the design and synthesis of efficient dyes and the identification of parameters limiting the solar cell performance. We have developed a new design strategy for the dyes: upon photoexcitation of the dye, the electron density is moving from the part that is attached to the semiconductor towards the part which is pointing away. This intramolecular charge transfer provides an efficient pathway for the following charge transfer processes. The first organic dye, composed of a triphenylamine (TPA) moiety as the electron-donor, dicyanovinyl groups as the electron-acceptors and linked by thiophene units, showed much better photovoltaic performance than other dyes reported at the same time, turning it into a model for future dye design. A series of dyes with different energy levels were synthesized and characterized on NiO-based devices using iodide/triiodide as redox couple. Lower photovoltaic performance was obtained for the dye with less negative reduction potential due to the insufficient driving force for dye regeneration. We have investigated the symmetric and unsymmetric structures of the dyes. The breaking of molecular symmetry did not significantly broaden the absorption spectrum, or improve the efficiency. In addition, we have tuned the molecular structure to prevent charge recombination. Increasing the distance between the anchoring group and the electron-acceptor was an effective way to improve the device efficiency. Besides TPA-based compounds, a zinc porphyrin dye was also synthesized and tested in p-type solar cells. However, the solar cell performed less well due to its narrow absorption band and the tendency for aggregation. Co-sensitization of the TPA-based dye with the porphyrin dye did not result in higher photovoltaic performance. After optimization of the dye structure, the highest overall conversion efficiency was achieved for the P5-sensitized solar cell, based on 1.5 μm NiO film prepared from NiCl2 and the F108 template precursor, and an acetonitrile-based electrolyte.
QC 20100909
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Marinado, Tannia. "Photoelectrochemical studies of dye-sensitized solar cells using organic dyes." Doctoral thesis, Stockholm : Skolan för kemivetenskap,Kungliga Tekniska högskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11248.

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Patel, Dinesh G. "Organic dyes for photoswitching and photovoltaic applications /." Thesis, Connect to this title online; UW restricted, 2007. http://hdl.handle.net/1773/8537.

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Cappel, Ute. "Characterisation of Organic Dyes for Solid State Dye-Sensitized Solar Cells." Doctoral thesis, Uppsala universitet, Fysikalisk kemi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-150047.

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Energy from the sun can be converted to low cost electricity using dye-sensitized solar cells (DSCs). Dye molecules adsorbed to the surface of mesoporous TiO2 absorb light and inject electrons into the semiconductor. They are then regenerated by the reduced redox species from an electrolyte, typically consisting of the iodide/tri-iodide redox couple in an organic solvent. In a solid state version of the DSC, the liquid electrolyte is replaced by an organic hole conductor. Solid state DSCs using 2,2'7,7'-tetrakis-(N,N-di-p-methoxyphenyl-amine)-9,9'-spirobifluorene (spiro-MeOTAD) have reached conversion efficiencies of up to 6 %, which is about half of the efficiency of the best iodide/tri-iodide cells.   Measurement techniques, such as spectroelectrochemistry and photo-induced absorption spectroscopy (PIA), were developed and applied to study the working mechanism of organic dyes in solid state DSCs under solar cell operating conditions. The energy alignment of the different solar cell components was studied by spectroelectrochemistry and the results were compared to photoelectron spectroscopy. PIA was used to study the injection and regeneration processes. For the first time, it was shown here that the results of PIA are influenced by an electric field due to the electrons injected into the TiO2. This electric field causes a shift in the absorption spectrum of dye molecules adsorbed to the TiO2 surface due to the Stark effect.   Taking the Stark effect into consideration during the data analysis, mechanistic differences between solid state and conventional DSCs were found. A perylene dye, ID176, was only able to efficiently inject electrons into the TiO2 in presence of lithium ions and in absence of a solvent. As a result, the sensitiser worked surprisingly well in solid state DSCs but not in liquid electrolyte ones. Regeneration of oxidised dye molecules by spiro-MeOTAD was found to be fast and efficient and spiro-MeOTAD could even reduce excited dye molecules.
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Swatton, Stewart Nathan Ridgley. "Dynamic excited state properties of organic dyes." Thesis, University of Exeter, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.244422.

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LEANDRI, VALENTINA. "Organic materials for dye-sensitized solar cells." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2014. http://hdl.handle.net/10281/49809.

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Worrall, David Robert. "Laser photolysis of photographic image dyes." Thesis, Loughborough University, 1992. https://dspace.lboro.ac.uk/2134/25247.

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Studies have been carried out investigating the photochemical and photophysical properties of pyrazolotriazole azomethine dyes. Such compounds can be used as magenta images in the subtractive colour photographic process. This work has been carried out both in dilute fluid solution and in high concentration, high viscosity systems designed to mimic the photographic product. Picosecond pump-probe laser flash photolysis studies have provided the first observation of photoinduced transient absorption changes attributable to the excited states of this class of dyes, and have allowed assignment of the excited singlet state lifetime as being in the range 1 to 3ps at room temperature, with little dependence upon solvent properties or the pattern of substituents on the dye skeleton. Using picosecond laser flash photolysis it has also been possible to observe evolution of the population along the ground state potential surface to the two isomeric forms, the rate of this process showing some solvent dependence. Nanosecond and picosecond laser flash photolysis studies have been used to investigate the process of syn-anti and anti-syn isomerisation about the azomethine linkage. The syn-anti photoisomerisation occurs on picosecond timescales, the anti isomer so produced relaxing thermally back to the syn form on timescales ranging from microseconds to milliseconds. The rate constant for this process is a complex function of solvent properties as well as being dependent upon steric factors within the molecule, and the reasons for this are discussed. Triplet energy sensitisation studies have demonstrated that a pathway exists for this isomerisation process via the triplet manifold, and has allowed determination of minimum isomerisation quantum yields from the triplet state. Such studies have also allowed estimation of limits for the molar decadic absorption coefficients of the anti isomer. The photographic product dyes have been demonstrated to be efficient quenchers of singlet molecular oxygen, the quenching mechanism being predominantly physical in nature. The quantum yields of singlet oxygen production are too small to be measured using time resolved techniques. These factors are used to explain in part the resistance of such compounds to oxidative photodegradation. Steady state irradiation of azomethine dyes in systems designed to simulate the photographic product by a high intensity source of known spectral profile has allowed determination of the quantum yields of photodegradation, which in combination with the results obtained in fluid solution provide a basis for explaining the behaviour of image dyes in the photographic product environment.
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Rogge, Carsten. "Photophysical studies of organic dyes in polymer matrices." Thesis, Cranfield University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266485.

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Bennett, Philip Mark. "Two-photon dyes for biological application." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:b8cb9ce4-35eb-433c-86fc-b5df53a2e566.

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Two photon absorption (TPA) is the near simultaneous absorption of two photons of light to achieve an electronically excited state. It has led to huge advances in microscopy and microfabrication due to its quadratic dependence on the local light intensity. This thesis describes the design, synthesis and application of dyes with strong TPA properties, and as such is divided into three chapters. The first introduces the theory and measurement of TPA as well as structure-property relationships known to maximise the efficiency of TPA. The subsequent chapters present explorations of the application of these dyes in biological applications; namely two-photon uncaging and two-photon photodynamic therapy. A recurring theme in my research is the discussion and evaluation of strategies for improving the compatibility of organic macromolecules with biological systems. Uncaging is the use of photolysis to achieve a rapid increase in the local concentration of a physiologically active species via a photoremovable protecting groups. Photoremovable protecting groups are covalently attached to the physiologically active species, thus rendering it inactive. At the desired time and location, a light dose releases the molecule in its active form. There are many compounds known to uncage following photoexcitation, but there are few examples of caging groups which exhibit both strong two-photon absorption properties and highly efficient uncaging. Chapter 2 discusses the rational design of such groups through the development of a new mechanism for uncaging, in which a photoinduced electron transfer (PeT) between a two-photon-excited electron donor and an electron acceptor/release group drives the uncaging event. Photodynamic therapy (PDT) is a treatment for neoplastic disorders such as cancer in which localised cell death is induced through photoexcitation of a sensitiser. Following light absorption, the photosensitiser enters a relatively long-lived excited state which reacts with cellular oxygen to produce its highly cytotoxic singlet form. The main challenges of the field are to achieve deep penetration of light into tissue and to reduce coincident damage to unaffected tissue by light scattering during irradiation. In 2008, the Anderson group reported the development of PDT photosensitisers with highly efficient two-photon absorption as well as high singlet oxygen quantum yields. Chapter 3 discusses strategies for improving the pharmacokinetics and defining the sub-cellular localisation of these photosensitisers.
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Davies, Richard Andrew. "Theoretical and computational aspects of organic chemistry." Thesis, Bangor University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.285502.

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Books on the topic "Organic dyes"

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Hayes, Teresa L., Wendy F. Marley, and Rebecca L. Friedman. Dyes & organic pigments industry. Cleveland: Freedonia Group, 1999.

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Ita, Paul A., and Aaron Hackle. World dyes & organic pigments. Cleveland: Freedonia Group, 2000.

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Petrone, Susan, and Mary F. Babington. Private companies in the dyes & pigments industry: Dyes, organic pigments & inorganic pigments. Cleveland, OH: Freedonia Group, Inc., 1998.

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Organization, World Health, and International Agency for Research on Cancer, eds. Some aromatic amines, organic dyes, and related exposures. Lyon: IARC Press, 2010.

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Gordon, P. F. Organic chemistry in colour. Berlin: Springer-Verlag, 1987.

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High-technology applications of organic colorants. New York: Plenum Press, 1991.

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The handbook of natural plant dyes: Personalize your craft with organic colors from acorns, blackberries, coffee, and other everyday ingredients. Portland, Or: Timber Press, 2010.

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T, Peters A., and Freeman H. S, eds. Colour chemistry: The design and synthesis of organic dyes and pigments. London: Elsevier Applied Science, 1991.

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Color chemistry: Syntheses, properties, and applications of organic dyes and pigments. 3rd ed. Zürich: Verlag Helvetica Chimica Acta, 2003.

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Zollinger, Heinrich. Color chemistry: Syntheses, properties, and applications of organic dyes and pigments. 2nd ed. Weinheim: VCH, 1991.

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Book chapters on the topic "Organic dyes"

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Mostoslavskii, M. A. "Photochromic Thioindigoid Dyes." In Organic Photochromes, 45–104. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4615-8585-5_2.

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Gordon, Paul Francis, and Peter Gregory. "Azo Dyes." In Organic Chemistry in Colour, 95–162. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-82959-8_3.

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Gordon, Paul Francis, and Peter Gregory. "Anthraquinone Dyes." In Organic Chemistry in Colour, 163–99. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-82959-8_4.

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Gordon, Paul Francis, and Peter Gregory. "Miscellaneous Dyes." In Organic Chemistry in Colour, 200–261. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-82959-8_5.

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Gregory, Peter. "Laser Dyes." In High-Technology Applications of Organic Colorants, 27–32. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4615-3822-6_4.

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Gregory, Peter. "Electrochromic Dyes." In High-Technology Applications of Organic Colorants, 53–56. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4615-3822-6_7.

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Gordon, Paul Francis, and Peter Gregory. "The Development of Dyes." In Organic Chemistry in Colour, 1–22. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-82959-8_1.

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Gregory, Peter. "Liquid Crystal Dyes." In High-Technology Applications of Organic Colorants, 7–13. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4615-3822-6_2.

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Abbotto, A., L. Beverina, R. Bozio, S. Bradamante, A. Facchetti, C. Ferrante, G. A. Pagani, D. Pedron, and R. Signorini. "Novel Heterocycle-Based Two-Photon Absorbing Dyes." In Organic Nanophotonics, 385–93. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-010-0103-8_32.

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Kamimura, Masao. "Organic Dyes for NIR Imaging." In Transparency in Biology, 57–71. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-9627-8_3.

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Conference papers on the topic "Organic dyes"

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Kang, Kwang-Sun, Wade N. Sisk, Faramarz Farahi, and M. Yasin Akhtar Raja. "Photocarrier Generation Efficiency of Pyrromethene-Doped Polymers." In Organic Thin Films for Photonic Applications. Washington, D.C.: Optica Publishing Group, 1995. http://dx.doi.org/10.1364/otfa.1995.md.12.

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Solid-state dye lasers based on polymethylmethacrylate (PMMA) polymers and pyrromethene laser dyes are currently being evaluated for lasing yield, damage threshold, and device lifetime.1 The fluorescence pathway in these solid-state dyes competes with the carrier production path. Popovic2 has demonstrated the connection between fluorescence yield and carrier generation for the phthalocyanines, namely higher fluorescence yield correlates with lower carrier yield. An improved understanding of the mechanism of organic photoconductors may enable selective optimization of conditions for lasing (fluorescence) or photocarrier production. Since pyrromethene dyes are known to exhibit strong fluorescence under zero field conditions3, low photocarrier yield and thus a high activation barrier for carrier production is predicted. The objective of this study is to determine the activation energy of photocarrier production in laser excited pyrromethene/PMMA samples by measuring the temperature dependence of the photoresponse. The dependence of charge generation on electron donor dopants, dye concentration, and laser intensity are also investigated; consequently information on charge traps and thermal decomposition rates is obtained.
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Haase, W., S. Grossmann, S. Saal, T. Weyrauch, and L. M. Blinov. "Efficiency of photoassisted poling of azobenzene, stilbene and biphenyl dyes as studied by Stark spectroscopy." In Organic Thin Films for Photonic Applications. Washington, D.C.: Optica Publishing Group, 1995. http://dx.doi.org/10.1364/otfa.1995.pd5.

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Besides the usual thermal assisted poling procedure the photoassisted poling reported for polymers containing azobenzene chromophores is of current interest. Usually the enhanced orientational mobility under illumination with visible light in the absorption band of the chromophore is explained by the trans⇔cis isomerization cycle of the azo dye, with a photoisomerization trans⇒cis and a thermal relaxation cis⇒trans. Because of the more compact shape of the cis isomer the rotational mobility is much higher than that of the trans isomer, thus polar orientation under electric DC field is possible. Since the memory of the polar orientation is lost only partially during the cis⇒trans transition, the trans isomers will achieve also a polar ordering [1-4]. This theory cannot be applied to systems containing stilbene dyes, where no thermal cis⇒trans relaxation is present. Investigations on systems containing stilbene dyes have also shown enhanced polar order in a poling process under illumination with visible light in the absorption range of the chromophore [5,6]. Thus the influence of heating of the sample (both macroscopically and microscopically in the vicinity of the dye molecule) must be discussed. The aim of this work is to compare the photoassisted poling behaviour of azo and stilbene dyes as well as of a non isomerizable biphenyl dye.
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Zhou, Hongyan, and Ze-sheng Li. "Theoretical Studies on Organic Dyes for Dye-Sensitized Solar Cells." In Advanced Optoelectronics for Energy and Environment. Washington, D.C.: OSA, 2013. http://dx.doi.org/10.1364/aoee.2013.asa3a.26.

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Boddula, Rajender, Ramachandra Naik, Naveen Kumar A, Ramyakrishna Pothu, Ahmed Bahgat Radwan, and Noora Al-Qahtani. "UV Induced Photodegradation of Direct Green dye by Tb-doped La10Si6O27 Catalyst." In The 2nd International Conference on Civil Infrastructure and Construction. Qatar University Press, 2023. http://dx.doi.org/10.29117/cic.2023.0179.

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Due to the expansion of industry, the world's population growth has led to increased air and water contamination. Because they are poisonous and non-biodegradable, organic dyes are a significant source of this contamination. Studies have concentrated on photocatalysts to transform organic dyes into innocuous compounds in order to lessen the harm that organic colours cause. In this study, solution combustion technique was employed to prepare rare-earth metal (terbium (Tb)) doped lanthanum silicate phosphor (La10Si6O27) using lanthanum nitrate and fumed silica were utilized as precursors, oxalyldihydrazide was used as fuel, and terbium nitrate was used as a dopant. The photocatalytic activities for the Direct Green-23 (DG23) dye degradation under UV irradiation were studied and found that 59.05% of dyes degraded at 120 min. These findings shows that, La10Si6O27 is a promising material for industrial dye degradation since 59.05% of the dyes were absorbed by the material in 120 min.
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Heier, Jakob, Chuyao Peng, Anna C. Véron, Roland Hany, Thomas Geiger, Frank A. Nüesch, Marcus V. G. Vismara, and Carlos F. O. Graeff. "Cyanine dyes in solid state organic heterojunction solar cells." In SPIE Organic Photonics + Electronics, edited by Zakya H. Kafafi, Paul A. Lane, and Ifor D. W. Samuel. SPIE, 2014. http://dx.doi.org/10.1117/12.2063977.

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Ogoshi, Kunizoh, Fumio Matsui, Tsutomu Suzuki, and Takeo Yamamoto. "An Optical Recording Disk Using an Organic Dye Medium." In Optical Data Storage. Washington, D.C.: Optica Publishing Group, 1985. http://dx.doi.org/10.1364/ods.1985.wdd2.

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Many organic dyes have been proposed as a recording media for Optical Digital Data Disks. It was found that a water-insoluble cyanine dye has excellent properties as an optical recording medium. Some of the properties of the cyanine dye for that purpose are as follows.
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Nunes da Silva, Raquel, Roberto Dias, Catarina Costa, Maria Santos, Ana Sousa, Mariana Alves, Susana Braga, et al. "Bio-macromolecular detection: new organic vital dyes." In 6th International Electronic Conference on Medicinal Chemistry. Basel, Switzerland: MDPI, 2020. http://dx.doi.org/10.3390/ecmc2020-07509.

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Reddy, B. R., P. Venkateswarlu, and M. C. George. "Optical phase-conjugate studies of organic dyes." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1990. http://dx.doi.org/10.1364/oam.1990.fd4.

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We have investigated several organic dyes in an effort to identify new nonlinear-optical substances because these substances are of current scientific interest owing to their possible applications in several areas. Some of the dyes investigated are 21,71-dichlorofluorescein (DCF), rhodamine 110 (R110) and pyridin 1—all doped in boric acid host. The concentration of the dyes is 10−3-10−4 M and the thickness of the samples is ~100 µm. Degenerate four-wave mixing experiments, using multimode Argon ion laser wavelengths, have been performed on these samples to generate phase-conjugate (PC) signals. PC reflectivities are ~10−4; the largest signals are obtained for DCF. When the pump beams are vertically polarized, the generated PC signals are also observed to be vertically polarized (vector phase conjugation). Grating growth and decay times and PC reflectivities have been measured as a function of laser power and wavelength. PC signals have been detected for angular separation between probe and pump beams as large as 90°. For samples containing DCF and R110, the grating growth and decay times are in the millisecond range. For pyridin 1, grating growth time is in seconds, and the decay time is several minutes (PC signal lasted for 1 hour).
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Zhang, Lixia, Priya Calamegham, Carl W. Dirk, Susan Ermer, and R. J. Twieg. "Investigation of the Stability of Electro-Optic Dyes." In Organic Thin Films for Photonic Applications. Washington, D.C.: Optica Publishing Group, 1995. http://dx.doi.org/10.1364/otfa.1995.md.27.

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Recent progress in organic electro-optic materials has lead to organic polymer devices that can modulate broad band visible light at frequencies which will permit the simultaneous transmission of thousands of real-time television signals down a single optical fiber. The intent is to manufacture modulator device structures which are incorporated directly on the same semiconductor chip which supplies both the electronics and power for the modulation process. Doing this requires polymers and electro-optic dyes that can withstand the processing conditions typical for semiconductor devices. The lowest temperature conditions available are about 350°C. We are presently involved in a collaborative project in conjunction with IBM Almaden Research Laboratories and Lockheed Corporation, in attempting to discover the decomposition temperatures of existing electro-optic dyes and conducting the analysis of the relationship between the decomposition temperatures and the molecular structures.
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Tadić, Julijana D., Jelena M. Lađarević, Maja D. Marković, Aleksandra M. Ivanovska, Mirjana M. Kostić, and Dušan Ž. Mijin. "A NOVEL AZO-AZOMETHINE DYE: SYNTHESIS, DYEING AND ANTIOXIDANT PROPERTIES." In 1st INTERNATIONAL Conference on Chemo and BioInformatics. Institute for Information Technologies, University of Kragujevac, 2021. http://dx.doi.org/10.46793/iccbi21.379t.

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Schiff bases, or azomethine compounds, are commonly employed in the fields of organic synthesis, metal complexes, materials, and engineering. Especially, they have gained importance in medicinal researches, considering their antimicrobial, anticancer, anti- inflammatory, and antioxidant properties. On the other side, azo dyes are the most significant group of synthetic dyes, utilized in textile fiber dyeing. Conjugation of Schiff bases with azo compounds leads to the class of azo-azomethine dyes, which have numerous applications related to their coloration and biological properties. Viscose is a textile material widely used in the medicine. Moreover, viscose fiber can be engineered in many ways which are significant in the development of medical materials. The antioxidant effect is an important feature of medical textiles, such as wound dressings. In this work, the microwave-assisted synthesis and characterization of novel azo-azomethine dye are reported. The azo-azomethine dye is obtained by the condensation between arylazo pyridone dye and 4-aminophenol. The structure of synthesized dye was determined by ATR-FTIR, NMR, and UV-Vis spectroscopy. Azo- azomethine dye was used for dyeing viscose, and the washing fastness of dyed material was evaluated according to the standard method. The viscose fabrics, before and after washing, were analyzed in terms of their color coordinates in the CIELab color space. The antioxidant properties of azo-azomethine dye and dyed viscose fabrics were examined by the ABTS method.
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Reports on the topic "Organic dyes"

1

Shaw, Kaden, Maia Ketteridge, and Lan Li. Comparison of DFT Basis Sets for Organic Dyes. Peeref, July 2022. http://dx.doi.org/10.54985/peeref.2207p2702048.

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Ogut, Serdar. Manipulating Light with Transition Metal Clusters, Organic Dyes, and Metal Organic Frameworks. Office of Scientific and Technical Information (OSTI), September 2017. http://dx.doi.org/10.2172/1389151.

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Bird, G., P. Panayotatos, R. Sauers, and J. Potenza. Photovoltaic p-n junction cells employing new organic dyes having high stability and designed molecular properties: Final subcontract report. Office of Scientific and Technical Information (OSTI), October 1986. http://dx.doi.org/10.2172/7228960.

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Kohn, Nancy P., Jill M. Brandenberger, Laurie A. Niewolny, and Robert K. Johnston. Organics Verification Study for Sinclair and Dyes Inlets, Washington. Office of Scientific and Technical Information (OSTI), September 2006. http://dx.doi.org/10.2172/909254.

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Pojman, John A., and Lydia L. Lewis. Preparation of Organic Dye Gradients for Optical Limiters. Fort Belvoir, VA: Defense Technical Information Center, August 2000. http://dx.doi.org/10.21236/ada387063.

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Asenath-Smith, Emily, Emma Ambrogi, Eftihia Barnes, and Jonathon Brame. CuO enhances the photocatalytic activity of Fe₂O₃ through synergistic reactive oxygen species interactions. Engineer Research and Development Center (U.S.), September 2021. http://dx.doi.org/10.21079/11681/42131.

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Iron oxide (α-Fe₂O₃, hematite) colloids were synthesized under hydrothermal conditions and investigated as catalysts for the photodegradation of an organic dye under broad-spectrum illumination. To enhance photocatalytic performance, Fe₂O₃ was combined with other transition-metal oxide (TMO) colloids (e.g., CuO and ZnO), which are sensitive to different regions of the solar spectrum (far visible and ultraviolet, respectively), using a ternary blending approach for compositional mixtures. For a variety of ZnO/Fe₂O₃/CuO mole ratios, the pseudo-first-order rate constant for methyl orange degradation was at least double the sum of the individual Fe₂O₃ and CuO rate constants, indicating there is an underlying synergy governing the photocatalysis reaction with these combinations of TMOs. A full compositional study was carried out to map the interactions between the three TMOs. Additional experiments probed the identity and role of reactive oxygen species and elucidated the mechanism by which CuO enhanced Fe₂O₃ photodegradation while ZnO did not. The increased photocatalytic performance of Fe2O3 in the presence of CuO was associated with hydroxyl radical ROS, consistent with heterogeneous photo-Fenton mechanisms, which are not accessible by ZnO. These results imply that low-cost photocatalytic materials can be engineered for high performance under solar illumination by selective pairing of TMOs with compatible ROS.
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