Effect of Additional Hydroxyl Group On Dissolution Of Azo Dyes derived from N-carboxylic acid-1,8-naphthalimide in aqueous solutions containing various surface active agents
K.
Gharanjig
Center of Excellence for Color Science and Technology,Department of Organic Colorants, Institute for Color Science and Technology
author
text
article
2013
eng
Dissolution of azo dyes derived from N-carboxylic acid-1,8-naphthalimide was studied in aqueous solutions containing formaldehyde condensation of naphthalenesulphonic acid and fatty alcohol ethylene oxide compound surfactants and effect of additional hydroxyl group on chemical structure of dye on dissolution was investigated. In addition, the effect of important factors on dissolution of used dyes in surfactant solutions such as the concentration of surfactants, temperature and time were considered. The results revealed that the dissolution rate of both dyes in formaldehyde condensation of naphthalenesulphonic acid was greater than the fatty alcohol ethylene oxide compound. In the same circumstance, the dissolution values of dyes indicated that dye 2 containing N-ethyl-n-2-hydroxyethyl aniline had more solubility than dye 1 containing N,N-diethylaniline that it can be attributed to the greater hydrophilicity of the dye 2 relative than dye 1. The results suggested that the dissolution of dyes in water containing surfactants was depended on the chemical structure of dyes and the type of used surfactants.
Progress in Color, Colorants and Coatings
Institute for Color Science and Technology (ICST)
2008-2134
6
v.
2
no.
2013
67
79
https://pccc.icrc.ac.ir/article_75812_1f3991e958614166a29cd6c28d2f976b.pdf
dx.doi.org/10.30509/pccc.2013.75812
Mixture of Ionic Liquids as Novel Media for Green Synthesis of Diketopyrrolopyrrole Pigments
F.
Nourmohammadian
Department of Organic Colorants, Institute of Color Science and Technology
author
S. S.
Shamekhi
Department of Organic Colorants, Institute for Color Science and Technology
author
text
article
2012
eng
A green method for the synthesis of high-performance diketopyrrolopyrrole pigments using diethyl succinate in the presence of mixture of ionic liquids is reported. Although, alkaline condition is needed in the succinate ester route for synthesis of the pigments, in the present study, the replacement possibility of conventional organic base by mixture of BMIMOH and BMIMBF4 ionic liquids was investigated. One of the points in this approach is utilization of diethyl succinate, a commercially available and low-cost reagent instead of di-t-butyl or t-amyl succinate as bulky esters which are recommended in conventional methods. The obtained results were compared with the results of synthesis in presence of each ionic liquid solely with sodium t-amyloxide.
Progress in Color, Colorants and Coatings
Institute for Color Science and Technology (ICST)
2008-2134
6
v.
2
no.
2012
81
86
https://pccc.icrc.ac.ir/article_75813_eb3477c3774748b8548b2bed087ef301.pdf
dx.doi.org/10.30509/pccc.2012.75813
A Dual colorimetric and Fluorometric Anion Sensor Based on Polymerizable 1, 8-Naphthalimide Dye
P.
Alaei
Department of Organic Colorants, Institute for Color Science and Technology
author
Sh.
Rouhani
Center of Excellence for Color Science and Technology,Department of Organic Colorants, Institute of Color Science and Technology
author
K.
Gharanjig
Center of Excellence for Color Science and Technology,Department of Organic Colorants, Institute for Color Science and Technology
author
text
article
2013
eng
A new polymerizable fluorescent sensor based on the photoinduced electron transfer PET for the selective determination of fluoride ions in DMF solutions has been synthesized. The sensing system was prepared by incorporating 4-Amino-1,8-naphthalimide derivatives containing thiourea side chain at the amino moiety AFTN as a neutral F- selective flourophore and was characterized by use of the DSC, FTIR, 1HNMR, 13CNMR and elemental analysis. The ability of AFTN to copolymerize with vinyl monomers of styrene by free radical copolymerization was demonstrated in order to design a potential polymer base flourophore sensor. The selectivity for F− among the halides is attributed mainly to the hydrogen-bond interaction of the receptor with F−. The results showed that this fluoroionophore could serve as a novel fluorescent sensor for further application.
Progress in Color, Colorants and Coatings
Institute for Color Science and Technology (ICST)
2008-2134
6
v.
2
no.
2013
87
96
https://pccc.icrc.ac.ir/article_75809_9fc93d4d3688e5a7dd9ed7967bcc4004.pdf
dx.doi.org/10.30509/pccc.2013.75809
Effect of activation factors on adsorption of cationic dye, methylene blue, by activated bentonite
A.
Salem
Chemical Engineering Department, Sahand University of Technology
author
M.
Saghapour
Chemical Engineering Department, Sahand University of Technology
author
text
article
2013
eng
The aim of this investigation was to study the relationship between activation factors and adsorption of cationic dye, methylene blue MB, by activated bentonite. The adsorption index was investigated as a function of acid type, time and temperature. A commercial bentonite was selected as a starting material and the effect of heat treatment on MB adsorption were determined in a batch setup. Though the adsorption index of activated adsorbents by choleric, sulfuric and nitric acids are higher than that for starting bentonite but this parameter depends on activation condition. The results clearly indicated that the maximum adsorption index is achieved when activation is carried out in the presence of 0.5 mol/l nitric acid at 98 C during 60 min. The finding results were confirmed by the measurement of the specific surface area of adsorbents with nitrogen adsorption technique and X-ray diffraction.
Progress in Color, Colorants and Coatings
Institute for Color Science and Technology (ICST)
2008-2134
6
v.
2
no.
2013
97
108
https://pccc.icrc.ac.ir/article_75811_28568e08b5eb1cd5da387d179f84c21b.pdf
dx.doi.org/10.30509/pccc.2013.75811
Synthesis and Application of Two Organic Dyes for Dye-Sensitized Solar Cells
M.
Hosseinnezhad
Center of Excellence for Color Science and Technology,Department of Organic Colorants, Institute for Color Science and Technology
author
S.
Moradian
Faculty of Polymer and Color Engineering,Amirkabir University of Technology, Center of Excellence for Color Science and Technology,Institute for Color Science and Technology
author
K.
Gharanjig
Center of Excellence for Color Science and Technology,Department of Organic Colorants, Institute for Color Science and Technology
author
text
article
2013
eng
In the present study, two new organic dyes based on indigo were prepared and used as sensitizers in dye-sensitized solar cells. To this end, indoxyl was utilized as the electron donor and cyanoacrylic acid as the electron acceptor anchoring groups. These dyes together with their corresponding intermediates were purified and characterized by FTIR, 1HNMR, 13CNMR, elemental analysis and UV-Visible analytical techniques. Spectrophotometric evaluations of the prepared dyes in solution and on a TiO2 substrate were carried out in order to assess changes in the status of the dyes. The results show that the dyes form j-type aggregates on the TiO2 substrate. Finally, dye sensitized solar cells were fabricated in order to determine the current density/ photovoltage curves and conversion efficiencies of each dye.
Progress in Color, Colorants and Coatings
Institute for Color Science and Technology (ICST)
2008-2134
6
v.
2
no.
2013
109
117
https://pccc.icrc.ac.ir/article_75808_108b15954731cfbc54dd7b14a6318ce5.pdf
dx.doi.org/10.30509/pccc.2013.75808
Effects of nano silica on the Anticorrosive properties of epoxy coatings
Z.
Ranjbar
Surface Coating and Corrosion Department, Institute for Color Science and Technology
author
Sh.
Ashhari
Surface Coating and Corrosion Department, Institute for Color Science and Technology
author
A.
Jannesari
Surface Coating and Corrosion Department, Institute for Color Science and Technology
author
Sh.
Montazeri
Surface Coating and Corrosion Department, Institute for Color Science and Technology
author
text
article
2013
eng
In this study a series of epoxy/silica nanocomposites were prepared by using nano silica particles which had different surface modifications. The morphology of the nanocomposite coatings was characterized by scanning electron microscopy SEM. The effects of the hydrophilic and hydrophobic feature of the nano particles on the Tg and anticorrosive properties of nanocomposite coatings were evaluated by DSC and EIS instruments. It was observed that the presence of the hydrophobic nano silica particles affected the curing and cross linking density of the organic coatings and consequently reduction in corrosion resistance of nanocomposite coatings. On the other hand hydrophilic nano composites coatings showed better corrosion resistance even after 60 day immersion in NaCl3.5 solution in comparison to pure epoxy coating
Progress in Color, Colorants and Coatings
Institute for Color Science and Technology (ICST)
2008-2134
6
v.
2
no.
2013
119
128
https://pccc.icrc.ac.ir/article_75810_d2bacf73d4926316ca932322bbc562ef.pdf
dx.doi.org/10.30509/pccc.2013.75810
Evaluating Dye Concentration in Bicomponent Solution by PCA-MPR and PCA-ANN Techniques
A.
Shams nateri
Textile Engineering Department, University of Guilan
author
text
article
2013
eng
This paper studies the application of principal component analysis, multiple polynomial regression, and artificial neural network ANN techniques to the quantitative analysis of binary mixture of dye solution. The binary mixtures of three textile dyes including blue, red and yellow colors were analyzed by PCA-Multiple polynomial Regression and PCA-Artificial Neural network PCA-ANN methods. The obtained results indicate that the accurateness of PCA-ANN technique is higher than PCA-Multiple polynomial regression and normal methods. The PCA-ANN technique is applicable for dye concentration bicomponent solution with both overlapping and non-overlapping spectra. Also the developed method can be a practical solution to remove noise in absorbance spectra and quantitative analysis of binary mixture of dye solutions with overlapping.
Progress in Color, Colorants and Coatings
Institute for Color Science and Technology (ICST)
2008-2134
6
v.
2
no.
2013
129
139
https://pccc.icrc.ac.ir/article_75814_1a77d3f0c5f00b5b62ccf472cb3fbdb4.pdf
dx.doi.org/10.30509/pccc.2013.75814