Photoactive hybrid material based on kaolinite intercalated with a reactive fluorescent silane

Sas, Samuel; Danko, Martin; Lang, Kamil; Bujdák, Juraj

doi:10.1016/j.clay.2015.02.031

Cited by 9 publications

(3 citation statements)

References 60 publications

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“…Spontaneous reactions in the interlayer generally promote the intercalation of molecules. This was exploited in the intercalation of a laser dye in the form of a reactive silane into the interlayers of expanded kaolinite [138]. The ability of many molecules, even large ones, to penetrate between the layers of clay minerals is also confirmed by so-called solid-state intercalations.…”

Section: Dye Adsorption On Clay Particle Agglomeratesmentioning

confidence: 97%

Controversial Issues Related to Dye Adsorption on Clay Minerals: A Critical Review

Bujdák

2023

Molecules

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This critical review points out the most serious and problematic issues to be found in the literature on the adsorption of dyes on clay minerals. The introduction draws attention to the fundamental problems, namely the insufficient characterization of adsorbents, the influence of impurities on the adsorption of dyes, and the choice of inappropriate models for the description of the very complex systems that clay minerals and their systems represent. This paper discusses the main processes accompanying adsorption in colloidal systems of clay minerals. The relationship between the stability of the colloidal systems and the adsorption of dye molecules is analyzed. The usual methodological procedures for determining and evaluating the adsorption of dyes are critically reviewed. A brief overview and examples of modified clay minerals and complex systems for the adsorption of organic dyes are summarized. This review is a guide for avoiding some faults in characterizing the adsorption of organic dyes on clay minerals, to improve the procedure for determining adsorption, to evaluate results correctly, and to find an appropriate theoretical interpretation. The main message of this article is a critical analysis of the current state of the research in this field, but at the same time, it is a guide on how to avoid the most common problems and mistakes.

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Section: Dye Adsorption On Clay Particle Agglomeratesmentioning

confidence: 97%

Controversial Issues Related to Dye Adsorption on Clay Minerals: A Critical Review

Bujdák

2023

Molecules

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“…A similar approach was used for the preparation of the hybrid with kaolinite. The mineral pre-expanded with DMSO was modified with active silane carrying a fluorophore group, which reacted with the surface OHgroups of the mineral surface (Sas et al, 2015). Significant luminescence was also achieved in this case.…”

Section: S Y N T H E S I S O F Dy E / C L Ay M I N E R a L H Y B R I mentioning

confidence: 99%

Hybrid systems based on organic dyes and clay minerals: Fundamentals and potential applications

Bujdák

2015

Clay miner.

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This review summarizes several aspects of the interactions between organic dyes and clay minerals, and presents some interesting properties of hybrid materials based on these components. It explains the basic phenomena and photophysical properties of dye/clay mineral hybrid systems (DCHS) while examining the role of clay minerals in them. A brief history of using dyes as tools for clay research and on traditional materials based on DCHS is presented. Metachromasy, the phenomenon of colour change related to the formation of dye molecular aggregates is described in detail and analysed from various perspectives. The properties of DCHS, including photoactivity, luminescence, photocatalytic properties, optical anisotropy and non-linear optical properties are analysed in detail. Clay minerals often play a significant role in the occurrence of specific photophysical phenomena such as resonance energy transfer and luminescence quenching and may influence various reactions, such as conformational changes in dye molecules, photochromism, photoisomerization, photosensitization and other photochemical processes. Routes to synthesize various types of hybrid materials are also described here. The relevance of DCHS for clay research, chemistry and materials science is summarized briefly.

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“…The grafted silane molecules mainly take place on internal surfaces, external surfaces and 'broken' edges by forming covalent bonds between silane molecules and clay surface hydroxyls which allows us to obtain special functional NH 2 groups for immobilization of desired secondary reactive species [19,20,33]. Due to the improved structural and surface characteristics of clays, silane grafting and organosilane materials have been widespreadly used in environmental applications, preparation of novel materials, electrolyte polymer membrane developments, clay ceramics, improvement of paints, polymer nanocomposite, immobilization of metal complexes, heterogeneous catalysis, electrochemistry, biosensors, adsorption of heavy metal ions (metal affinity), drug delivery systems and enzyme immobilization [34][35][36][37][38][39][40][41][42][43][44][45][46]. There are progressively increasing studies in the field of silane grafted materials due to improvement of clay features.…”

Section: Introductionmentioning

confidence: 99%

Characterization of a hybrid-smectite nanomaterial formed by immobilizing of N-pyridin-2-ylmethylsuccinamic acid onto (3-aminopropyl)triethoxysilane modified smectite and its potentiometric sensor application

Topçu

Çağlar

et al. 2016

Adv. Nat. Sci: Nanosci. Nanotechnol.

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A novel N-pyridin-2-ylmethylsuccinamic acid-functionalized smectite nanomaterial was synthesized by immobilizing of N-pyridin-2-ylmethylsuccinamic acid through chemical bonding onto (3-aminopropyl)triethoxysilane modified smectite. The structural, thermal, morphological and surface properties of raw, silane-grafted and the N-pyridin-2-ylmethylsuccinamic acidfunctionalized smectites were investigated by various characterization techniques. The thermal analysis data showed the presence of peaks in the temperature range from 200 °C to 600 °C due to the presence of physically adsorbed silanes, intercalated silanes, surface grafted silanes and chemically grafted silane molecules between the smectite layers. The powder x-ray diffraction patterns clearly indicated that the aminopropyl molecules also intercalated into the smectite interlayers as bilayer arrangement whereas N-pyridin-2-ylmethylsuccinamic acid molecules were only attached to 3-aminopropyltriethoxysilane molecules on the external surface and edges of clay and they did not intercalate. Fourier transform infrared spectroscopy confirms N-pyridin-2ylmethylsuccinamic acid molecules bonding through the amide bond between the amine group of aminopropyltriethoxysilane molecules and a carboxylic acid functional group of N-pyridin-2ylmethylsuccinamic acid molecules. The guest molecules functionalized onto the smectite caused significant alterations in the textural and morphological parameters of the raw smectite.

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Photoactive hybrid material based on kaolinite intercalated with a reactive fluorescent silane

Cited by 9 publications

References 60 publications

Controversial Issues Related to Dye Adsorption on Clay Minerals: A Critical Review

Controversial Issues Related to Dye Adsorption on Clay Minerals: A Critical Review

Hybrid systems based on organic dyes and clay minerals: Fundamentals and potential applications

Characterization of a hybrid-smectite nanomaterial formed by immobilizing of N-pyridin-2-ylmethylsuccinamic acid onto (3-aminopropyl)triethoxysilane modified smectite and its potentiometric sensor application

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