32903-07-4Relevant academic research and scientific papers
Synthesis of mordant azo dyes using supported Diazonium ions and br?nsted acidic ionic liquids
Das, Pranab J.,Begum, Jesmin
, p. 355 - 361 (2019/05/21)
Diazonium ions supported on Amberlite IR120 (Na+) have been prepared and used for the synthesis of a variety of 5-arylazo-8-hydroxyquinoline in solid state as well as in pyridinium based ionic liquids under microwave heating. The two methods have been compared with respect to ease of recovery, yield, reaction time and environmental impact.
Pyridine aided progression from amorphous to crystalline bis([5-(aryl)-1-diazenyl]quinolin-8-olato)zinc(II) compounds???Solution and solid-state structural characterization, nanoparticle formation and antibacterial activity
Basu Baul, Tushar S.,Nongsiej, Khrawborlang,Biswas, Koel,Joshi, Santa Ram,H?pfl, Herbert
, p. 756 - 773 (2018/07/29)
Ten new zinc(II) compounds, viz. [Zn(LQ)2(4-MePy)2]·H2O (1), [Zn(LMeAQ)2(Py)2]·C6H6 (2a), [Zn(LMeAQ)2(H2O)2] (2b
Study on Relationship Between Fluorescence Properties and Structure of Substituted 8-Hydroxyquinoline Zinc Complexes
Jianbo, He,Tingting, Zhou,Yongjing, Cao,Yuanyuan, Zhang,Weiqing, Yang,Menglin, Ma
, p. 1121 - 1126 (2018/08/17)
Organic light-emitting diodes (OLEDs) produced from 8-hydroxyquinoline metal complexes play a vital role in modern electroluminescent devices. In this manuscript, a series of 8-hydroxyquinoline derivatives were synthesized by different methods and their corresponding zinc metal complexes were prepared. The UV and fluorescence properties of the complexes were measured aiming to understand the effect of substituents at the quinoline ring on the fluorescence properties of the complexes. When the C-5 of 8-hydroxyquinoline was replaced by halogen group, the fluorescence emission wavelengths had been red-shifted, at the same time, blue-shifted of fluorescence emission wavelength was observed when the C-5 position of 8-hydroxyquinoline was substituted by electron-withdrawing group. When the C-4 position of 8-hydroxyquinolie was substituted by methyl or the C-5 position was substituted by sulfonic acid group, the corresponding zinc complexes had higher fluorescence intensity than 8-hydroxyquinolie zinc.
Thermal properties, geometrical structures, antimicrobial activity and DNA binding of supramolecular azo dye complexes
El-Sonbati,Diab,El-Bindary,Shoair,Beshry
, p. 400 - 420 (2016/03/19)
Ru(III) complexes of 5-(4-derivative phenyl azo)-8-hydroxyquinoline (HLn) are prepared and characterized by elemental analyses, IR, UV-Visible spectra, 1H and 13C NMR spectra, mass spectra, X-ray diffraction analysis, conductivity measurements and magnetic susceptibility measurements as well as thermal analysis. The XRD patterns show that the ligand (HL3) has a polycrystalline nature and complex (2) is completely amorphous. The ligands act as a monobasic bidentate coordinating through CN and OH groups by replacement of a proton from the latter group. The molar conductivities show that the Ru(III) complexes are non-electrolyte in nature. The spectra show that all complexes are octahedral in which two chlorides are attached to the metal ion. The optimized bond lengths, bond angles and the calculated quantum chemical parameters for the ligands (HLn) and Ru(III) complexes are investigated. Molecular docking was used to predict the binding between azo dye ligands and the receptor of prostate cancer mutant 2q7k-hormone. The activation thermodynamic parameters, such as activation energy (Ea), enthalpy (ΔH?), entropy (Δ?) and Gibbs free energy change of the decomposition (ΔG?) are calculated using Coats-Redfern and Horowitz-Metzger methods. The ligands (HLn) and Ru(III) complexes are screened for their antimicrobial activity against bacterial and fungal species. The tested complexes (1) and (2) have good antibacterial activity against Bacillus cereus and the tested ligands (HL2, HL3 and HL5) have good antifungal activity against Aspergillus Niger and also HL5 showed against Alternaria alternata. The catalytic oxidation of cyclohexanol by [Ru(Ln)(AsPh3)2Cl2]·xH2O with periodic acid as co-oxidant is described. The Ru(III) complexes exhibited a catalytic activity for the oxidation of cyclohexanol to cyclohexanon.
Molecular docking, potentiometric and thermodynamic studies of some azo quinoline compounds
Shoair,El-Bindary,El-Sonbati,Beshry
, p. 740 - 748 (2016/02/05)
The ligands of 5-(4-derivative phenyl azo)-8-hydroxyquinoline and its derivatives (HLn) were synthesized from the coupling of the quinoline with diazonium salt derived from aniline and its p-derivatives and characterized by different spectrosco
Geometrical structures, thermal, optical and electrical properties of azo quinoline derivatives
El-Ghamaz,El-Bindary,El-Sonbati,Beshry
, p. 628 - 639 (2015/08/19)
Azo quinoline derivatives (AQx) were synthesized by coupling of 8-hydroxyquinoline with aniline derivatives. The optimized bond lengths, bond angles and the quantum chemical parameters for the ligands (AQx) were calculated. The dielectric constants (εr and εi) and ac conductivity (σac) were studied as a function of both temperature and frequency in the temperature range 293-509 K and frequency range 102-105 Hz. The thermal activation energies ΔE1 and ΔE2 were calculated and found to be in the range of 0.03-0.26 and 0.2-1.31 eV, respectively, depending on the substituent and frequency. The conduction mechanism was investigated for all the derivatives under investigation. The ligands (AQ1, AQ2 and AQ4) were found to be controlled by correlated barrier hopping model and the ligands (AQ3 and AQ5) were controlled by small polaron tunneling mechanism. The optical absorption properties of the ligands thin films were investigated. The absorption coefficient (α) spectra reveals two absorption peaks which are assigned as π-π? and n-π? transitions. The optical energy gap (Eg) was investigated near the absorption edge and found to be in the range of 1.34-2.26 and 1.47-1.69 eV for direct and indirect optical transitions, respectively.
Azo-8-hydroxyquinoline dyes: The synthesis, characterizations and determination of tautomeric properties of some new phenyl- and heteroarylazo-8-hydroxyquinolines
Saylam, Aytül,Sefero?lu, Zeynel,Ertan, Nermin
, p. 267 - 276 (2014/04/17)
Two series of new heterocyclic and carbocyclic disperse azo dyes based on 8-hydroxyquinoline were prepared and characterized by FT-IR, 1H NMR, mass spectroscopic techniques and elemental analysis. Their solvatochromic properties in different solvents were investigated and their absorption spectra were strongly solvent dependent. The acid and base effects on this equilibrium were also examined. In addition, the colors of dyes were discussed with respect to the nature of the carbocyclic and heterocyclic rings and substituent therein. To determine the tautomeric forms of the prepared dyes in solid state, X-ray data for 5-(5-methylthiazol-2-yldiazenyl)-8-hydroxyquinoline were recorded. The X-ray results showed that the dye exists as an azo tautomer in the solid state.
