Photostability of Monoazo Disperse Dyes in Different Solvents

2013 ◽  
Vol 834-836 ◽  
pp. 472-475
Author(s):  
Narumol Ittarat ◽  
Potjanart Suwanruji ◽  
Thitinun Karpkird ◽  
Jantip Setthayanond
Keyword(s):  
Melting Point ◽  
Visible Light ◽  
Elemental Analysis ◽  
Disperse Dyes ◽  
Initial Value ◽  
Methyl Group ◽  
H Nmr ◽  
Monoazo Disperse Dyes

Twelve monoazo disperse dyes were synthesized and then characterized by melting point (m.p.) measurement, elemental analysis and1H-NMR. The photostability of monoazo disperse dyes in solvents with different polarities was evaluated thereafter the dyes in each solvent were irradiated with visible light for 8 hours. The percentage of photostability of the dye decreased from the initial value in the range of 5-10%. The photostability was affected by the substituted group of the dyes regardless of the solvent used. Different R1group on the diazo component increased the photostability in order of H˃CN˃Cl. The photostability of the dye was also higher when R2group on the coupling component was a methyl group.

A Study of Corrosion Inhibition of Carbon Steel in Hydrochloric Acid Using BIMGCS12-3

2012 ◽  
Vol 427 ◽  
pp. 3-6 ◽  
Author(s):  
Yong Ming Sun ◽  
Hong Ling Chen
Keyword(s):  
Melting Point ◽  
Carbon Steel ◽  
Hydrochloric Acid ◽  
Corrosion Inhibition ◽  
Elemental Analysis ◽  
Inhibition Efficiency ◽  
Raw Materials ◽  
Ammonium Bromide ◽  
Target Compound ◽  
H Nmr

Gemini benzimidazole cationic surfactant, propanediyl-α, ω-bis-(N-dodecyl benzimidazole ammonium bromide), referred as BIMGCS12-3, was synthesized from the raw materials of benzimidazole, dodecane bromide and dibromopropane. The structure of the target compound was confirmed by1H NMR, elemental analysis and melting point measurements. Its surface properties were determined and corrosion inhibition of carbon steel in 1M HCl was investigated by gravimetric measurements. BIMGCS12-3 exhibited excellent protection for carbon steel in the low concentration 20mg L-1and the inhibition efficiency for corrosion decreased with increment of temperature.

Studies in Vilsmeier-Haack reaction. Application to quinoxalinones

1990 ◽  
Vol 55 (11) ◽  
pp. 2715-2721 ◽  
Author(s):  
Ibrahim M. A. Awad ◽  
Khairy M. Hassan
Keyword(s):  
Nmr Spectroscopy ◽  
Elemental Analysis ◽  
Antimicrobial Activities ◽  
Heterocyclic Amines ◽  
Gram Negative Bacteria ◽  
Gram Negative ◽  
Methyl Group ◽  
H Nmr ◽  
Quinoxalinone Derivatives

The 3-methyl group in quinoxalinones I and II has been found to undergo diformylation by Vilsmeier reagent to give the corresponding aminoacrolein derivatives (III, IV). Condensation and/or interaction of III or IV with some secondary heterocyclic amines and/or with hydrazine, phenylhydrazine and hydroxylamine affords the related 3-methyl-N-(1H)-2-quinoxalinone and 1,3-dimethyl-2-quinoxalinone derivatives (VII-XVIII), some with pronounced fluorescence activities. All synthesized compounds have been screened in vitro for their antimicrobial activities against Gram-positive and Gram-negative bacteria. The structures of these compounds were confirmed by elemental analysis, IR and 1H NMR spectroscopy.

scholarly journals Disperse dyes based on 2-methyl-3-[3’-amino-phthalimido]-4(3H)-quinazilinone

2002 ◽  
Vol 67 (11) ◽  
pp. 719-726 ◽  
Author(s):  
Vijay Patel ◽  
Manish.P. Patel ◽  
Ranjan Patel
Keyword(s):  
Melting Point ◽  
Infrared Spectrum ◽  
Elemental Analysis ◽  
Visible Spectrum ◽  
Disperse Dyes ◽  
Nylon 66 ◽  
Dyeing Performance ◽  
Percentage Yield ◽  
Uv Visible ◽  
Derivatives Of

A series of new heterocyclic disperse dyes has been prepared by subsequent diazotization of 2-methyl-3-[3?-aminophthalimido]-4(3H)-quinazolinone and coupling with various mono- and di-N-substituted derivatives of aniline. All the disperse dyes were characterized by their percentage yield, melting point, UV-visible spectrum, elemental analysis, infrared spectrum and dyeing performance on nylon 66 and polyester fibres. The percentage dye bath exhaustion on different fibres was found to be reasonably good and acceptable. The dyed fibres showed fair to fairly good to good fastness to light and very good to excellent fastness to washing, rubbing, perspiration and sublimation.

scholarly journals Synthesis of monoazo disperse dyes based on 2-aminoheterocycles and their dyeing performance on nylon fabrics

2000 ◽  
Vol 65 (11) ◽  
pp. 773-780 ◽  
Author(s):  
Hari Maradiya ◽  
Vithal Patel
Keyword(s):  
Absorption Spectra ◽  
Elemental Analysis ◽  
Disperse Dyes ◽  
Visible Absorption ◽  
Dyeing Performance ◽  
Nylon Fabric ◽  
Wide Range ◽  
Rf Values ◽  
Monoazo Disperse Dyes ◽  
Dyed Fabric

Novel monoazo disperse dyes based on various 2-aminoheterocycles were prepared using N-methyl-N-(2-hydroxyethyl)aniline as the coupling component. All the dyes were applied as disperse dyes on nylon fabric. These dyes have been found to give a wide range of colour shades with very good depth, brightness and levelness on nylon fabric. The visible absorption spectra, elemental analysis and Rf values were investigated. The percentage dye bath exhaustion on fabric was found to be very good. The dyed fabric showed very good to excellent fastness to light, washing, rubbing and perspiration. The sublimation fastness was found to be excellent.

scholarly journals Thiophene based monoazo disperse dyes for polyester fabric

2002 ◽  
Vol 67 (1) ◽  
pp. 17-26 ◽  
Author(s):  
Hari Maradiya ◽  
Vithal Patel
Keyword(s):  
Elemental Analysis ◽  
Polyester Fabric ◽  
Spectral Studies ◽  
Disperse Dyes ◽  
Polyester Fabrics ◽  
Light Yellow ◽  
Brown Colour ◽  
Monoazo Disperse Dyes

A series of monoazo disperse dyes have been prepared by coupling 2-amino 3-carbethoxy-4,5-dimethylthiophene with various N-arylmaleimides. The monoazo disperse dyes were characterised by IR spectral studies and elemental analysis. These dyes were applied at 2%depth on polyester fabrics and gave light yellow to brown colour hues with fair fastness to light and very good to excellent fastness to washing, rubbing, perspiration and sublimation. The percentage exhaustion of the dyebath and fixation on the fabric were found to be very good.

Synthesis and Antituberculotic Activity of Some Substituted 3-Arylamino-5-cyano-2-pyrazinecarboxamides

1995 ◽  
Vol 60 (7) ◽  
pp. 1236-1241 ◽  
Author(s):  
Martin Doležal ◽  
Jiří Hartl ◽  
Antonín Lyčka ◽  
Vladimír Buchta ◽  
Želmíra Odlerová
Keyword(s):  
Nucleophilic Substitution ◽  
Elemental Analysis ◽  
Nmr Spectra ◽  
Substituted Anilines ◽  
H Nmr

Nucleophilic substitution of 3-chloro-5-cyano-2-pyrazinecarboxamide by substituted anilines afforded substituted 3-arylamino-5-cyano-2-pyrazinecarboxamides I-X. The structures of compounds were confirmed by elemental analysis, UV, IR and 1H NMR spectra. The assessment of in vitro antimycotic and antimycobacterial activities of the compounds was carried out. The highest antituberculotic activity against M. tuberculosis in this series was shown by 3-anilino- 5-cyano-2-pyrazinecarboxamide (I), whose efficacy was the same as that of pyrazinecarboxamide.

scholarly journals Synthesis and Cytotoxic Activity Study of Novel 2-(Aryldiazenyl)-3-methyl-1H-benzo[g]indole Derivatives

Molecules ◽  
2021 ◽  
Vol 26 (14) ◽  
pp. 4240
Author(s):  
Manar M. Arafeh ◽  
Ebrahim Saeedian Moghadam ◽  
Sirin A. I. Adham ◽  
Raphael Stoll ◽  
Raid J. Abdel-Jalil
Keyword(s):  
Melting Point ◽  
Cytotoxic Activity ◽  
Elemental Analysis ◽  
13C Nmr ◽  
National Cancer Institute ◽  
Polyphosphoric Acid ◽  
Human Cancer ◽  
Indole Derivatives ◽  
Human Cancer Cell ◽  
Human Cancer Cell Lines

A novel series of 2-(aryldiazenyl)-3-methyl-1H-benzo[g]indole derivatives (3a–f) were prepared through the cyclization of the corresponding arylamidrazones, employing polyphosphoric acid (PPA) as a cyclizing agent. All of the compounds (3a–f) were characterized using 1H NMR, 13C NMR, MS, elemental analysis, and melting point techniques. The synthesized compounds were evaluated for cytotoxic activity against diverse human cancer cell lines by the National Cancer Institute. While all of the screened compounds were found to be cytotoxic at a 10 µM concentration, two of them (2c) and (3c) were subjected to five dose screens and showed a significant cytotoxicity and selectivity.

scholarly journals Isocyanate und verwandte Verbindungen des trimeren Phosphornitriddifluorids / Isocyanates and Related Compounds of Trimeric Phosphor-difluoronitride

1971 ◽  
Vol 26 (7) ◽  
pp. 679-683 ◽  
Author(s):  
Herbert W. Roesky ◽  
Enno Janssen
Keyword(s):  
Ir Spectra ◽  
Elemental Analysis ◽  
Mass Spectra ◽  
H Nmr ◽  
Carbonic Acids ◽  
Related Compounds

P3N3F5NCO was prepared by reaction of P3N3F5NSO with (COCl) 2. Substituted amides were obtained from the reaction of P3N3F5NSO with carbonic acids e. g. P3N3F5NHCOCH3, P3N3F5NHCOC2H5, and P3N3F5NHCOC3H7. If these substances were treated with PCl5 the following compounds P3N3F5N = CClCH3, P3N3F5N = CClCH5, and P3N3F5TN = CClC3H7 were formed. They reacted with nucleophiles to give P3N3F5N = CNH2CH3, P3N3F5N = TN (CH3) 2C2H5, and P3N3F5N = CN (CH3) 2CH7. The properties of these compounds are described. They were characterized by elemental analysis and IR-spectra. 19F-, 1H-NMR, and mass spectra are reported.

scholarly journals Synthesis, Characterization, and Electrochemical Behaviour of Cobalt(II) and Nickel(II) Complexes with N2O2 Chelating Ligand 4,4′-(Biphenyl-4,4′-diyldinitrilo)dipentan-2-one

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
Lakhdar Sibous ◽  
Embarek Bentouhami ◽  
Mustayeen Ahmed Khan
Keyword(s):  
Schiff Base ◽  
Mass Spectroscopy ◽  
Elemental Analysis ◽  
Electrochemical Behaviour ◽  
Absolute Ethanol ◽  
Molar Ratio ◽  
H Nmr ◽  
Chelating Ligand ◽  
Metal Ligand

4,4′-Diaminobiphenyl reacts with 2,4-pentanedione in absolute ethanol in a molar ratio 1 : 2 to form mainly the product of [1 + 2] condensation, 4,4′-(biphenyl-4,4′-diyldinitrilo)dipentan-2-one (H2L). The Schiff base was used as tetradentate chelating ligand to coordinate CoII and NiII chlorides leading to complexes where the ratio of metal ligand was found to be 2 : 1 or 2 : 2. All the synthesized products were characterized by elemental analysis, infrared, electronic, and mass spectroscopy, 1H NMR, and DSC. The electrochemical behaviour of the ligand and its complexes in DMF is also investigated.

scholarly journals Synthesis, Characterization and Study of the Biological activity of Some Aldimines Derivatives

2006 ◽  
Vol 3 (4) ◽  
pp. 257-261 ◽  
Author(s):  
Mohamed N. Ibrahim ◽  
Hazem K. Al - Deeb
Keyword(s):  
Biological Activity ◽  
Schiff Bases ◽  
Aromatic Aldehyde ◽  
Aromatic Amine ◽  
Elemental Analysis ◽  
Primary Aromatic Amine ◽  
H Nmr

A number of imines derivatives have been synthesized, they were obtained by condensation of aromatic aldehyde derivatives with primary aromatic amine derivatives. Their structures have been characterised by IR,1H NMR in addition to the elemental analysis. The biological activity of these imines (which are also known as Schiff bases) were examined against different type of microorganisms and they found to have considerable activity in comparison with the most commonly used antibiotics.

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