Photoactive organic-inorganic hybrid materials: From silylated compounds to optical applications

Rodrigues, Marieli Oliveira; Isoppo, Victória Goulart; Moro, Angélica V.; Rodembusch, Fabiano Severo

doi:10.1016/j.jphotochemrev.2021.100474

Cited by 19 publications

(3 citation statements)

References 121 publications

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“…Moreover, high (titania, zirconia) and low (silica) refractive index materials can be used to build the devices. In addition, organic functions can be incorporated in the oxides and even functional nanoparticles can be trapped inside the pores, broadening the range of applications. − …”

Section: Introductionmentioning

confidence: 99%

Effect of Aqueous Media over Stability and Optical Performance of Mesoporous 1D Photonic Crystals

Morrone,

Ramallo,

Boissière

et al. 2023

Chem. Mater.

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Photonic crystals based on mesoporous thin-film multilayers have generated great interest in the field of sensing due to their high sensibility to small changes in the medium refractive index. However, they usually include silica-based porous oxides in their composition, a material whose stability in water is low. This feature could limit the sensors performance in long-term operation. In this work, various photonic crystals based on Si, Ti, and Zr mesoporous pure and hybrid oxide thin films were exposed to water and their optical, structural, and mechanical properties were evaluated as a function of contact time, either in batch or in flow conditions. The thickness, porosity, and pore ordering of the layers were followed by means of electron microscopy, small-angle X-ray scattering, and X-ray reflectivity, and the mechanical properties were evaluated by nanoindentation. In addition, the aqueous media in contact with the multilayered systems was characterized by X-ray fluorescence to determine the presence of dissolved species. Finally, the vapor detection capabilities of the different systems was evaluated. The obtained results indicate that the photonic bands move toward shorter wavelengths as the contact time with water increases, indicating material loss, in accordance with the behavior of the photonic crystal building blocks. Moreover, the mechanical properties of the systems are affected by changes in the composition of the layers as a result of the selective dissolution of specific components. However, no structural collapse of the porous materials is observed that also remain responsive to vapors, indicating that the multilayers are affected in a limited way by water contact.

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Section: Introductionmentioning

confidence: 99%

Effect of Aqueous Media over Stability and Optical Performance of Mesoporous 1D Photonic Crystals

Morrone,

Ramallo,

Boissière

et al. 2023

Chem. Mater.

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“…An N-silylated benzothiazolium dye was synthesized as coupling agent for biocomposites [ 30 ]. Silylated benzothiazoles with photochromic properties are a very interesting hybrid precursors with a wide range of application as for example chemosensors for metal cations, anions, pH, bioimaging, aerogels and drug delivery systems [ 31 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Solvatochromism and Estimation of Ground and Excited State Dipole Moments of Silylated Benzothiazole Dyes

2023

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Dyes derived from benzothiazoles are an important class of heterocycles that have remarkable photophysical properties. New photoluminescent 2-phenylbenzothiazole derivatives containing different functional groups were synthesized in high yields and used for the synthesis of silylated derivatives. New photoactive structures were fully characterized and their photophysical properties were investigated. The absorption and uorescence spectra of benzothiazoles in a series of organic solvents were evaluated. The results showed that benzothiazoles are strongly uorescent showing absorption in the UV region and emission in the blue region with moderate quantum yields and high Stokes shift. The solvatochromism of benzothiazoles was investigated by Lippert and E T (30) Dimroth-Reichardt empirical solvent polarity scales for organic solvents. The dipole moments obtained by Bakshiev and Kawaski-Chamma-Viallet equations revealed that the excited states are more polar than the ground states.

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“…Fluorescent hybrid materials, which combine the advantages of both organic and inorganic material, have become one of the most popular star materials in modern society due to their potential applications in many fields such as sensor technology [ 1 , 2 , 3 , 4 , 5 , 6 ], photoelectric device [ 7 , 8 , 9 , 10 , 11 , 12 ], biomedicine [ 13 , 14 , 15 , 16 , 17 ], and environmental sciences [ 18 , 19 , 20 , 21 ]. However, the demand for high-performance and multifunctional fluorescent materials has increased dramatically along with the development of science and technology.…”

Section: Introductionmentioning

confidence: 99%

Design of Fluorescent Hybrid Materials Based on POSS for Sensing Applications

et al. 2022

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Polyhedral oligomeric silsesquioxane (POSS) has a nanoscale silicon core and eight organic functional groups on the surface, with sizes from 0.7 to 1.5 nm. The three-dimensional nanostructures of POSS can be used to build all types of hybrid materials with specific performance and controllable nanostructures. The applications of POSS-based fluorescent materials have spread across various fields. In particular, the employment of POSS-based fluorescent materials in sensing application can achieve high sensitivity, selectivity, and stability. As a result, POSS-based fluorescent materials are attracting increasing attention due to their fascinating vistas, including unique structural features, easy fabrication, and tunable optical properties by molecular design. Here, we summarize the current available POSS-based fluorescent materials from design to sensing applications. In the design section, we introduce synthetic strategies and structures of the functionalized POSS-based fluorescent materials, as well as photophysical properties. In the application section, the typical POSS-based fluorescent materials used for the detection of various target objects are summarized with selected examples to elaborate on their wide applications.

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Photoactive organic-inorganic hybrid materials: From silylated compounds to optical applications

Cited by 19 publications

References 121 publications

Effect of Aqueous Media over Stability and Optical Performance of Mesoporous 1D Photonic Crystals

Effect of Aqueous Media over Stability and Optical Performance of Mesoporous 1D Photonic Crystals

Synthesis, Solvatochromism and Estimation of Ground and Excited State Dipole Moments of Silylated Benzothiazole Dyes

Design of Fluorescent Hybrid Materials Based on POSS for Sensing Applications

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