Azorubine: physical, thermal and bioactive properties of the widely employed food, pharmaceutical and cosmetic red azo dye material

Leulescu, Marian; Rotaru, Andrei; Moanță, Anca; Iacobescu, Gabriela; Palarie, I.; Cioateră, Nicoleta; Popescu, Mariana; Criveanu, Marius Cătălin; Morîntale, Emilian; Bojan, Mihaela; Rotaru, P.

doi:10.1007/s10973-021-10618-4

Cited by 22 publications

(8 citation statements)

References 55 publications

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“…With the widespread use of various dyes, numerous dyes have been released into the environment in the process of the production and use of these dyes. Most dyes are extremely stable, and it is difficult for them to undergo natural degradation [ 1 , 2 , 3 ]. After entering a water environment, the chromaticity of the contaminated water is caused, which can affect the amount of incident light and the normal life activities of the aquatic animals and plants, and thus destruct the ecological balance of water.…”

Section: Introductionmentioning

confidence: 99%

Oxidation-Induced and Hydrothermal-Assisted Template-Free Synthesis of Mesoporous CeO2 for Adsorption of Acid Orange 7

Ding

2022

Materials

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Hydrogen peroxide (H2O2), an accessible and eco-friendly oxidant, was employed for the template-free hydrothermal synthesis of mesoporous CeO2 based on a cerium carbonate precursor (Ce2(CO3)3•xH2O). Its microstructure and physicochemical properties were characterized by XRD, TEM and N2 sorption techniques. The formation of the CeO2 phase with a porous structure was strongly dependent on the presence of H2O2, while the values of the BET surface area, pore diameter and pore volume of CeO2 were generally related to the amount of H2O2 in the template-free hydrothermal synthesis. The BET surface area and pore volume of the mesoporous CeO2 synthesized hydrothermally at 180 °C with 10 mL H2O2 were 112.8 m2/g and 0.1436 cm3/g, respectively. The adsorption process had basically finished within 30 min, and the maximum adsorption efficiency within 30 min was 99.8% for the mesoporous CeO2 synthesized hydrothermally at 140 °C with 10 mL, when the initial AO7 concentration was 120 mg/L without pH preadjustment. The experimental data of AO7 adsorption were analyzed using the Langmuir and Freundlich isotherm modes. Moreover, the mesoporous CeO2 synthesized at 140 °C with 10 mL H2O2 was regenerated in successive adsorption–desorption cycles eight times without significant loss in adsorption capacity, suggesting that the as-synthesized mesoporous CeO2 in this work was suitable as an adsorbent for the efficient adsorption of AO7 dye from an aqueous solution.

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Section: Introductionmentioning

confidence: 99%

Oxidation-Induced and Hydrothermal-Assisted Template-Free Synthesis of Mesoporous CeO2 for Adsorption of Acid Orange 7

Ding

2022

Materials

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“…Each sample was filtered and the concentration of MB and Az in the filtrate was determined as the arithmetic means of three measurements. The dye concentration was determined using UV absorption spectroscopy (Leki SS2109 UV spectrophotometer, Mediora Oy, Finland) according to the optical density at a wavelength of 246 nm (for MB) and 515 (for Az) nm …”

Section: Methodsmentioning

confidence: 99%

“…The dye concentration was determined using UV absorption spectroscopy (Leki SS2109 UV spectrophotometer, Mediora Oy, Finland) according to the optical density at a wavelength of 246 nm (for MB) 31 and 515 (for Az) nm. 32 The sorption capacity of the sorbent (C), mg/g (the amount of adsorbed substance) was determined using the following formula…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Aluminosilicate Nanosponges: Synthesis, Properties, and Application Prospects

et al. 2021

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A simple one-step method is presented for fabricating inorganic nanosponges with a kaolinite [Al2Si2O5(OH)4] structure. The nanosponges were synthesized by the hydrothermal treatment of aluminosilicate gels in an acidic medium (pH = 2.6) at 220 °C without using organic cross-linking agents, such as cyclodextrin or polymers. The formation of the nanosponge morphology was confirmed by scanning electron microscopy, and the assignment of the synthesized aluminosilicates to the kaolinite group was confirmed by X-ray diffraction and infrared spectroscopy. The effect of the synthesis conditions, in particular, the nature (HCl, HF, NaOH, and H2O) and pH of the reaction medium (2.6, 7, and 12), as well as the duration of the synthesis (3, 6, and 12 days), on the morphology of aluminosilicates of the kaolinite group was studied. The sorption capacity of aluminosilicate nanosponges with respect to cationic (e.g., methylene blue) and anionic (e.g., azorubine) dyes in aqueous solutions was studied. The pH sensitivity of the surface ζ potential of the synthesized nanosponges was demonstrated. The dependence of the hemolytic activity (the ability to destroy erythrocytes) of aluminosilicate nanoparticles on the particle morphology (platy, spherical, and nanosponge) has been identified for the first time. Aluminosilicate nanosponges were not found to exhibit hemolytic activity. The prospects of using aluminosilicate nanosponges to prepare innovative functional materials for ecology and medicine applications, in particular, as matrices for drug delivery systems, were identified.

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“…Azo dyes are generally used in the leather, food, and cosmetics industries because they have bright colours and good stability. Apart from this, they have been widely employed in a variety of areas including the food (Yamjala et al, 2016) and cosmetics industries (Leulescu et al, 2021) and as metal-organic frameworks (MOFs) (Ayati et al, 2016), covalent-organic frameworks (COFs) (Xue et al, 2023), corrosion inhibitors for iron (Madkour et al, 2018), catalysis (Liu et al, 2016), non-linear optics (Kato et al, 1994) and fibre optics (Kavitha et al, 2022). In addition to this, azo dyes have been found to have biological, biomedical, and pharmacological applications, such as in DNA binding and antioxidants (Qamar et al, 2019), drug design (Demirc ¸alı & Topal, 2023), and virology (Meng et al, 2021).…”

Section: Chemical Contextmentioning

confidence: 99%

Crystal structure, Hirshfeld surface analysis and energy frameworks of 1-[(E)-2-(2-fluorophenyl)diazan-1-ylidene]naphthalen-2(1H)-one

Akkache,

Hamdouni,

Boudjada

et al. 2024

Acta Crystallogr E Cryst Commun

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The title compound, C16H11N2OF, is a member of the azo dye family. The dihedral angle subtended by the benzene ring and the naphthalene ring system measures 18.75 (7)°, indicating that the compound is not perfectly planar. An intramolecular N—H...O hydrogen bond occurs between the imino and carbonyl groups. In the crystal, the molecules are linked into inversion dimers by C—H...O interactions. Aromatic π–π stacking between the naphthalene ring systems lead to the formation of chains along [001]. A Hirshfeld surface analysis was undertaken to investigate and quantify the intermolecular interactions. In addition, energy frameworks were used to examine the cooperative effect of these intermolecular interactions across the crystal, showing dispersion energy to be the most influential factor in the crystal organization of the compound.

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Azorubine: physical, thermal and bioactive properties of the widely employed food, pharmaceutical and cosmetic red azo dye material

Cited by 22 publications

References 55 publications

Oxidation-Induced and Hydrothermal-Assisted Template-Free Synthesis of Mesoporous CeO2 for Adsorption of Acid Orange 7

Oxidation-Induced and Hydrothermal-Assisted Template-Free Synthesis of Mesoporous CeO2 for Adsorption of Acid Orange 7

Aluminosilicate Nanosponges: Synthesis, Properties, and Application Prospects

Crystal structure, Hirshfeld surface analysis and energy frameworks of 1-[(E)-2-(2-fluorophenyl)diazan-1-ylidene]naphthalen-2(1H)-one

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