Synthesis, substituent effects and solvatochromic properties of some disperse azo dyes derived from N-phenyl-2, 2′-iminodiethanol

Yazdanbakhsh, Mohammad; Mohammadi, Asadollah

doi:10.1016/j.molliq.2009.06.001

Cited by 52 publications

(15 citation statements)

References 15 publications

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“…Mohammadi et al [118], have been synthesized of certain novel azo-hydrazone tautomeric dyes according to the reaction sequence shown in Figure 55, [118,119,120]. Figure 56 shows different possibilities of the structure of bis-azo dyes according to the aromatic part 1a-1e.…”

Section: Synthesis Of Azo Dyes Contain Chemical Groups Hydrazonementioning

confidence: 99%

Classifications, properties, recent synthesis and applications of azo dyes

Benkhaya

M’rabet

Harfi

2020

Heliyon

583

187

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In this work, we have presented a very detailed review of the different classification of azo dyes as a function of the number of azo groups and the appropriate functional groups. Then we pointed out some chemical properties of these dyes such as reactivity, isomerization and tautomerism and listed. In the following, we have summarized some recent syntheses of azo dyes and the mechanism of azo dye/polymer conjugation. Finally, we indicate the principle of Gewald's reaction and its application to the synthesis of new azo dyes.

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Section: Synthesis Of Azo Dyes Contain Chemical Groups Hydrazonementioning

confidence: 99%

Classifications, properties, recent synthesis and applications of azo dyes

Benkhaya

M’rabet

Harfi

2020

Heliyon

583

187

View full text Add to dashboard Cite

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“…From the FT‐IR spectrum of CAAPM, it showed that the band at 3300 cm −1 was fairly broad and corresponded to the stretching vibration of free and hydrogen‐bonded NH groups. The symmetrical vibration of NN group was observed at 1512 cm −1 19, 20. According to the FT‐IR spectrum of CAPU, the peak 1749cm −1 was the ester stretching vibration peaks, indicating that the OCON group existed.…”

Section: Resultsmentioning

confidence: 96%

Preparation, thermo‐optic property and transmission loss of chiral azobenzene polyurethane

Liu

Qiu

Cao

et al. 2011

J of Applied Polymer Sci

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A novel chiral azobenzene polyurethane (CAPU) was prepared from chromophore, chiral reagent L(À)-tartaric acid and toluene diisocyanate (TDI). The chemical structure and the thermal property were characterized by UV-Vis spectrum, FT-IR, 1 H NMR, circular dichroism (CD) spectrum, differential scanning calorimeter (DSC) and thermogravimetric analysis (TGA). DSC and TGA experiments showed that the glass transition temperature (T g ) and the decomposition temperature (T d ) at 5% mass loss were 110 C and 199 C, respectively. The refractive index (n) and thermo-optic coefficient (dn/dT) of the CAPU were measured at 650 nm wavelength and different temperature by attenuated total reflection (ATR) technique. By using CCD digital imaging devices, transmission loss of CAPU was measured and the value is 0.565dB/cm. The results will provide the foundation for many potential applications such as digital thermo-optic switch materials and other fields in the future.

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“…The percentage contributions of the solvatochromic interactions, Table 6 shows that most of the solvatochromism is due to solvent dipolarity/polarizability (non-specific solvent interactions) and HBD ability (α term) which increases their electron density and thus decreases the push-pull character of the chromophore [ 46 ]. However, in cases of compounds 6g and 6h where β values (HBA ability) of the solvent are greater than α values, this could be explained by the interaction of HBA solvents with the carbonyl groups of the acetyl and ester groups of the 6g and 6h molecules, respectively.…”

Section: Resultsmentioning

confidence: 99%

Synthesis, Characterization, Tautomeric Structure and Solvatochromic Behavior of Novel 4-(5-Arylazo-2-Hydroxystyryl)-1-Methylpyridinium Iodide as Potential Molecular Photoprobe

et al. 2016

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A novel series of the title compound 4-(5-arylazo-2-hydroxystyryl)-1-methylpyridinium iodide 6 has been synthesized via condensation reactions of the arylazosalicylaldehyde derivatives 4a–i with 1-methyl-picolinium iodide 5. The structures of the new arylazo compounds were characterized by 1H NMR, IR, mass spectroscopy, as well as spectral and elemental analyses. The electronic absorption spectra of arylazomerocyanine compounds 6 were measured in different buffer solutions and solvents. The pK′s and pK*′s in both the ground and excited states, respectively, were determined for the series and their correlations with the Hammett equation were examined. The results indicated that the title arylazomerocyanine dyes 6 exist in the azo form 6A in both ground and excited states. The substituent and solvent effects (solvatochromism) of the title compound arylazomerocyanine dyes were determined using the Kamlet-Taft equation and subsequently discussed.

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Synthesis, substituent effects and solvatochromic properties of some disperse azo dyes derived from N-phenyl-2, 2′-iminodiethanol

Cited by 52 publications

References 15 publications

Classifications, properties, recent synthesis and applications of azo dyes

Classifications, properties, recent synthesis and applications of azo dyes

Preparation, thermo‐optic property and transmission loss of chiral azobenzene polyurethane

Synthesis, Characterization, Tautomeric Structure and Solvatochromic Behavior of Novel 4-(5-Arylazo-2-Hydroxystyryl)-1-Methylpyridinium Iodide as Potential Molecular Photoprobe

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