Crystal structures of C.I. Disperse Red 65 and C.I. Disperse Red 73

Lee, Jieun; Kim, Hyun Jee; Han, Mi Ran; Lee, Su Yeon; Jo, Won Joo; Lee, Shim Sung; Lee, Jeong Sook

doi:10.1016/j.dyepig.2008.07.001

Cited by 21 publications

(10 citation statements)

References 21 publications

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“…The X-ray single crystal structure of cyanine dyes can provide details of the molecular conformation, including the intra-and inter-molecular interactions in the solid state, and the information which assists to understand the technical performance of the dyes. [7][8][9] Aggregation is one of the features of cyanine dyes in solution, affecting their photophysical and photochemical properties. Many photophysical processes and photochemical reactions of cyanine dyes involve associated molecules, and the aggregation plays an important role in many fields of applied chemistry such as biomedical field, photographic chemistry, laser chemistry, [10][11][12] etc.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Crystal Structure, Spectral and Thermodynamic Properties of One Benzoindole Pentamethine Cyanine Dye

Zhang

Zhao

et al. 2013

J Chinese Chemical Soc

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One benzoindole pentamethine cyanine dye was synthesized and characterized by 1 H NMR, IR, MS and UV-Vis spectra. The UV-Vis absorption and fluorescence spectra of the dye in chloroform, dimethyl sulfoxide, acetone, ethanol and methanol were investigated, and the l max of the dye was in the region 682.0-689.0 nm with large molar extinction coefficients (e > 10 5 M -1 cm -1 ) in different solvents. The structure of the dye was also characterized and analyzed by X-ray diffraction. Crystallographic data revealed that the dye belonged to orthorhombic, with space group P2 1 2 1 2 1 , a = 10.059(2) Å, b = 15.098(4) Å, c = 24.989(6) Å, V = 3794.8(15) Å 3 , Z = 4. The C-H ¼ F intermolecular hydrogen bonds were displayed in the molecular system, which were effective in the molecular packing. The aggregation behavior and thermodynamic properties of the dye in aqueous methanol solution were also studied by means of UV-Vis spectroscopy methods. The results indicated that the dye existed monomer-dimer equilibrium in aqueous methanol solutions. The fundamental properties of the dye, such as the dimeric association constant K D , the dimeric free energy DG D , the dimeric entropy DS D , and the dimeric enthalpy DH D were determined. The DH D of the dye was -46.0 kJ mol -1 .

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Section: Introductionmentioning

confidence: 99%

Synthesis, Crystal Structure, Spectral and Thermodynamic Properties of One Benzoindole Pentamethine Cyanine Dye

Zhang

Zhao

et al. 2013

J Chinese Chemical Soc

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“…In the two dyes, X-ray crystal structures were correlated with the IR spectra, particularly illustrating the molecular configurations and intra-and inter-molecular Contents lists available at ScienceDirect journal homepage: www.elsevier.com/locate/mssp connections. The details through the X-ray crystallography resulting about the molecular configuration (or intermolecular interactions) relating to the cyanine and merocyanine dyes are still effective and are a view to their practical application [7]. Interestingly, the derivatives of isoxazolone can be present in three tautomeric forms i.e.…”

Section: Introductionmentioning

confidence: 99%

Thermoelectric and optoelectronic properties of a heterocyclic isoxazolone nucleus compound

Reshak

Azam

2015

Materials Science in Semiconductor Processing

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“…Apresenta uma estrutura em espinélio normal, em que os cátions de Zn 2+ ocupam os espaços tetraédricos, enquanto que os cátions Fe 3+ ocupam as posições octaédricas (102,103) . A Figura 20 (104) (105) .…”

Section: Ferrita De Zincounclassified

“…É citado que a primeira etapa que ocorre na redução da ferrita de zinco é a sua dissociação em óxido de zinco (ZnO) e óxido de ferro (Fe 2 O 3 ). A partir deste momento, os dois óxidos são reduzidos simultaneamente (105) . Tong 2001 (106) , por sua vez, também cita que os mecanismos de redução de ferrita de zinco podem ser comparados com os dos óxidos de ferro.…”

Section: Ferrita De Zincounclassified

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Reciclagem de poeira de aciaria: estudo da redução da poeira de aciaria LD, elétrica e ferrita de zinco.

Junca¹

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Resumo Uma grande quantidade de poeiras e fumos contendo óxidos de ferro, zinco, alumínio, cálcio, chumbo, magnésio e cádmio são habitualmente gerados durante a produção do aço em usinas siderúrgicas semiintegradas. Processos hidrometalúrgicos e pirometalúrgicos têm sido desenvolvidos para o tratamento da poeira de aciaria elétrica (PAE). O processo Waelz, que recupera parte destes resíduos por meio de reações metalúrgicas de redução e oxidação em um forno rotativo, é uma tecnologia de destaque empregada para a recuperação dos metais voláteis, e tem sido a mais usada nos últimos 40 anos. Neste trabalho, foi realizado um estudo termodinâmico do processo Waelz, visando à otimização das condições metalúrgicas necessárias para garantir a recuperação dos metais voláteis (em especial zinco), de forma a assegurar a minimização de impactos ambientais e maximização de opções de processamento para a recuperação do zinco contido. As variáveis cinéticas foram estudadas por meio da execução de uma serie de 6 experimentos, englobando os principais fatores do processamento, tais como: tipo de redutor e tempo/temperatura de processamento. Também foi avaliado o comportamento mecânico das pelotas para cada formulação. Caracterizações por meio de microscopia eletrônica com microanálise via EDS, difração de raios X, fluorescência de raios X, análise granulométrica a laser, resistência à compressão, porcentagem de matéria volátil, carbono fixo e cinzas foram empregados. Palavras-chave: Pelotas autorredutoras; Recuperação do zinco; Tratamento de resíduo de aciaria; Processo Waelz. Abstract A high amount of residues such as dust and fumes containing iron oxides, zinc, aluminum, calcium, lead, magnesium and cadmium are usually generated during the steel production in steel mills, which produce it from scrap melting. Hydrometallurgical and pyrometallurgical processes have been developed to the treatment of electric arc furnace dust (EAF). The Waelz process, that recovers part of these residues through metallurgical reactions of oxidation and reduction in a rotary kiln, is a leading technology used for the recovery of volatile metals, and has been widely used over the past 40 years. In this work, an initial thermodynamic and kinetic study of the Waelz reduction process was conducted, aiming to optimize the metallurgical conditions needed to ensure the recovery of volatile metals (especially zinc) and therefore assure the minimization of environmental impacts and maximization of more sustainable processing options and with higher added value due to the increase of zinc recovery from the dust and metallurgical residues. Kinetic variables were studied by running a series of six experiments, covering the main processing variables such as content and type of the binder, content and type of the reducer and processing time/temperature. The behavior and thermomechanical properties will also be assessed. There were used characterizations by electron microscopy, X-ray diffraction, X-ray fluorescence, particle size analysis with laser, compressive ...

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Crystal structures of C.I. Disperse Red 65 and C.I. Disperse Red 73

Cited by 21 publications

References 21 publications

Synthesis, Crystal Structure, Spectral and Thermodynamic Properties of One Benzoindole Pentamethine Cyanine Dye

Synthesis, Crystal Structure, Spectral and Thermodynamic Properties of One Benzoindole Pentamethine Cyanine Dye

Thermoelectric and optoelectronic properties of a heterocyclic isoxazolone nucleus compound

Reciclagem de poeira de aciaria: estudo da redução da poeira de aciaria LD, elétrica e ferrita de zinco.

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