Synthesis and characterization of amorphous aluminosilicates prepared by sol–gel to encapsulate organic dyes

Martínez-Zapata, O.; Méndez-Vivar, J.; Bosch, P.; Lara, V.H.

doi:10.1016/j.jnoncrysol.2011.06.020

Cited by 14 publications

(4 citation statements)

References 34 publications

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“…Various procedures have been proposed for obtaining chemically stable pigments. Numerous studies have focused on sol-gel methods, and on the adsorption of organic chromophores onto an inorganic host [7,8]. Organic–inorganic materials can also be produced by the complexation of natural and synthetic dye molecules with solid host matrices.…”

Section: Introductionmentioning

confidence: 99%

Characterization and Structure–Property Relationships of Organic–Inorganic Hybrid Composites Based on Aluminum–Magnesium Hydroxycarbonate and Azo Chromophore

et al. 2019

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In this study, novel organic–inorganic composites were prepared by the complexation of dicarboxylic azo dye (AD) with aluminum–magnesium hydroxycarbonate (AlMg–LH). This procedure provides an effective method for the stabilization of dicarboxylic organic chromophores on an AlMg−LH host. The structures of the hybrid composites were examined by X-ray diffraction (XRD), secondary ion mass spectrometry (TOF-SIMS), 27-Al solid-state nuclear magnetic resonance (NMR) spectroscopy, thermogravimetric analysis (TGA) and scanning transmission electron microscopy (STEM). The TOF-SIMS method was applied to investigate the metal–dye interactions and to monitor the thermal stability of the organic–inorganic complexes. Secondary ion mass spectrometry confirmed the presence of a characteristic peak for C18H10O5N2Mg22+, indicating that both carboxylic groups interacted with AlMg−LH by forming complexes with two Mg2+ ions. Modification with hybrid pigments affected the crystal structure of the AlMg−LH mineral, as shown by the appearance of new peaks on the X-ray diffraction patterns. Adsorption of the dicarboxylic chromophore not only led to significantly enhanced solvent resistance but also improved the thermal and photostability of the hybrid pigments. We propose a possible arrangement of the azo dye in the inorganic matrix, as well as the presumed mechanism of stabilization.

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Section: Introductionmentioning

confidence: 99%

Characterization and Structure–Property Relationships of Organic–Inorganic Hybrid Composites Based on Aluminum–Magnesium Hydroxycarbonate and Azo Chromophore

et al. 2019

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“…O controle da contaminação pode ser realizado utilizando vários recursos, dentre eles é frequente a adoção de compostos químicos para a eliminação, inibição ou remoção seletiva de microrganismos. Estes produtos químicos são os Biocidas (MARTÍNEZ, 2011).…”

Section: Introductionunclassified

O Óleo De Hortelã (Mentha Spicata L.) Como Alternativa No Combate À Halitose Em Pacientes Oncológicos: Uma Revisão Bibliográfica

Medeiros,

Bezerra,

Silva

et al. 2023

Abordagens Em Medicina: Avanços Científicos, Tecnológicos E Sociais

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medicina: avanços científicos, tecnológicos e sociais -Volume 2 está licenciado sob CC BY 4.0.Essa licença permite que outros remixem, adaptem e desenvolvam seu trabalho para fins não comerciais e, embora os novos trabalhos devam ser creditados e não possam ser usados para fins comerciais, os usuários não precisam licenciar esses trabalhos derivados sob os mesmos termos. O conteúdo da obra e sua forma, correção e confiabilidade são de responsabilidade exclusiva dos autores e não representam a posição oficial da Amplla Editora. O download e o compartilhamento da obra são permitidos, desde que os autores sejam reconhecidos. Todos os direitos desta edição foram cedidos à Amplla Editora.

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“…The incorporation of a pigment to inorganic matrices to obtain a hybrid material that improves the resistance and chemical stability of the pigments has been widely studied in several fields of application and different production methodologies [44][45][46][47][48].…”

Section: Introductionmentioning

confidence: 99%

Carminic Acid Linked to Silica Nanoparticles as Pigment/Antioxidant Bifunctional Excipient for Pharmaceutical Emulsions

et al. 2020

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The incorporation of pigments and natural polyphenols into inorganic matrices, resulting in a hybrid material that improves the resistance and chemical stability of the pigments and the antioxidant capacity of the materials, has been of great interest to the pharmaceutical, chemical and food industries. The aim of this work was to prepare and characterize a bifunctional pigment–antioxidant nanomaterial-based carminic acid-decorated solid core-mesoporous shell silica nanoparticles, evaluating its properties as a pigment, its antioxidant capacity and its properties as a chemical stabilizer of emulsions. The chemical stability of oil-in-water (O/W) Pickering emulsions was evaluated determining the stability of vitamin E solubilized in the oil phase. Carminic acid was attached through the action of coupling ethylcarbodiimide hydrochloride (EDC)/N-hydroxysuccinimide (NHS) agents, and the resulting spherical and homogeneous nanoparticles showed a diameter close to 175 nm. A notorious change of emulsion color was observed by the addition of the nanomaterial. Emulsions showed an attractive pink color, and when the pH was adjusted to pH 3 and pH 9, a change in color was observed, analogous to carminic acid in solution. The nanomaterial incorporation also improved chemical stability, decreasing vitamin E consumption to 9.26% of the initial value, demonstrating an important antioxidant effect of the developed nanomaterial.

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Synthesis and characterization of amorphous aluminosilicates prepared by sol–gel to encapsulate organic dyes

Cited by 14 publications

References 34 publications

Characterization and Structure–Property Relationships of Organic–Inorganic Hybrid Composites Based on Aluminum–Magnesium Hydroxycarbonate and Azo Chromophore

Characterization and Structure–Property Relationships of Organic–Inorganic Hybrid Composites Based on Aluminum–Magnesium Hydroxycarbonate and Azo Chromophore

O Óleo De Hortelã (Mentha Spicata L.) Como Alternativa No Combate À Halitose Em Pacientes Oncológicos: Uma Revisão Bibliográfica

Carminic Acid Linked to Silica Nanoparticles as Pigment/Antioxidant Bifunctional Excipient for Pharmaceutical Emulsions

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