Nitroxoline Azo Dye Complexes as Effective Heterogeneous Catalysts for Color Removal and Degradation of Some Organic Textile Dyes

Abstract

A new azo dye ligand of sulfadiazine with 5‐nitro‐8‐hydroxyquinoline (H2L) and its Cu(II), Mn(II), Co(II), and Ni(II) complexes have been synthesized and characterized using CHN, 1H NMR, EI‐mass, inductive coupled plasma, molar conductance, IR, thermogravimetric analysis, magnetic moment measurements, and UV–vis spectra. On the basis of spectral studies and analytical data, the azo dye acts as a monobasic bidentate ligand coordinating to the metal ions via deprotonated OH and azo nitrogen atom. The spectral data showed that the synthesized complexes have octahedral geometry. The application of the obtained chelates in the oxidative decomposition of three different textile dyes (i.e., AB92, AB40, and AB129) in the presence of H2O2 as an oxidant has been studied. The obtained results indicated that the reactivity of catalysts toward the decolorization of AB40 showed the following order: Cu complex > Ni complex > Co complex > Mn complex; the reactions obey the first‐order reaction mechanism, and the rate constants were determined.

Synthesis, structural identification, DNA interaction and biological studies of divalent Mn, Co and Ni chelates of 3‐amino‐5‐mercapto‐1,2,4‐triazole azo ligand

“…[6] The azo dye chelates have received much attention due to their versatile use in many technical applications such as dyeing [7,8] printing systems [9,10] as well as in catalysis. [11][12][13] Azo compounds are an important class of ligands which attracted a great deal of interest owing to their rich coordination chemistry. [14][15][16][17] These compounds are found to possess extensive applications in different fields.…”

Fluorescent UO2(II) and ZrO(II) complexes: Synthesis, structural characterization, fluorescence, DNA binding studies and biological applications in cell probing

“…All compounds used in the present study were of pure grade available from Aldrich or Sigma. The ligands H 3 L 1 , H 2 L 2 and H 2 L 3 were synthesized as reported earlier …”

Chelation in Antibacterial Drugs: From Nitroxoline to Cefiderocol and Beyond

“…Nitroxoline (5-nitro-8-hydroxyquinoline, NIT) is a heterocyclic aromatic compound from a family of 8-hydroxyquinoline (8-HQ, or oxine) derivatives, a group of compounds with an extremely broad spectrum of pharmacological [ 16 , 20 , 22 , 35 , 75 , 76 ] and non-pharmacological [ 77 , 78 , 79 ] applications. NIT does not belong to any typical class of antibacterials, and it is best known as an effective uroantiseptic that shows no pronounced toxic side effects [ 16 , 19 , 80 , 81 ].…”