Isotropic and anisotropic environment effects on the UV/vis absorption spectra of three disperse azo dyes

Zakerhamidi, M.S.; Keshavarz, Masoumeh; Tajalli, H.; Ghanadzadeh, A.; Ahmadi, Sohrab; Moghadam, M.; Hosseini, Seyed Hossein; Hooshangi, Vahid

doi:10.1016/j.molliq.2010.04.010

Cited by 40 publications

(13 citation statements)

References 19 publications

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“…The AS multiple correlation coefficient value reflects the goodness of the fit, the values (0.993–0.810) of the correlation coefficient indicated that the correlation between spectroscopic data and the certain solvent parameter is acceptable [45]. …”

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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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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“…The red-shift effect can be ascribed to an increased contribution of lone pairs of the electro negative atoms to the delocalized p-electronic system [44]. Blue shift transition originates from the fact that the solvent molecules are oriented around the solute molecules to fit with the ground state charge distribution of the solute molecules.…”

Section: Carbon Tetrachloride (Ccl 4 )mentioning

confidence: 99%

Calculation of spectral shifts in UV–visible region and photoresponsive behaviour of fluorinated liquid crystals: Effect of solvent and substituent

Praveen¹,

Ojha²

2012

Materials Chemistry and Physics

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“…[11] Isotropic and anisotropic environment effects on the ultraviolet (UV)/vis absorption spectra of three disperse azo dyes was investigated. [12] The effects of an electric field on liquid crystal materials have been of considerable interest to both academia and industry. [13] The direct influences of the electric field on LC include a shift in the phase transition temperature, variation in order parameter and a change in symmetry.…”

Section: Introductionmentioning

confidence: 99%

Preparation of poly(2‐anilinoethanol) containing azobenzene group under electrical field and its liquid crystalline properties investigation

Hosseini

Hoshangi

2014

Polymers for Advanced Techs

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In this project, 2- [N-ethyl-N-[4-[(4′-nitrophenyl) A comparison of the results reveals that the polymer produced under electric field is more linear, regular in shape with high electrical conductivity, as well as good LC behavior with semectic texture. The resulted monomer and poly(2AECP-Red-I) are characterized by using Fourier transform infrared and ultraviolet-visible and were studied by thermogravimetric analysis and differential scanning calorimetry. Scanning electron microscopy images supported the formation of poly(2AECP-Red-I) and showed morphology feature and homogeneous structure on poly(2AECP-Red-I). Electrical conductivity of poly(2AECP-Red-I) has been studied by four-point probe method.

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Isotropic and anisotropic environment effects on the UV/vis absorption spectra of three disperse azo dyes

Cited by 40 publications

References 19 publications

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

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

Calculation of spectral shifts in UV–visible region and photoresponsive behaviour of fluorinated liquid crystals: Effect of solvent and substituent

Preparation of poly(2‐anilinoethanol) containing azobenzene group under electrical field and its liquid crystalline properties investigation

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