Organic dyes supported on silicon-based materials: synthesis and applications as photocatalysts

Abstract

The most important advance in photocatalysis in the last decade has been the synthesis and application of organic compounds to promote this process. Organic dyes have shown ecological and economic...

Anthraquinone-Modified Silica Nanoparticles as Heterogeneous Photocatalyst for the Oxidative Hydroxylation of Arylboronic Acids

“…On account of these properties, silicon-type material can host diverse PCs (e.g., metals and organic dyes), [23], [24], [25], [26], [27], [28] with good anchoring and easy recycling, leading to a large variety of possible chemical reactions. [29] Among the organic transformations that take place in the presence of PCs, the obtaining of substituted phenols presents important industrial applications. Phenols are used in manufacturing polymers and producing biologically active ingredients with pharmaceutical and agrochemical applications.…”

Anthraquinone‐Modified Silica Nanoparticles as Heterogeneous Photocatalyst for the Oxidative Hydroxylation of Arylboronic Acids

“…On account of these properties, silicon-type material can host diverse PCs (e. g., metals and organic dyes), [23][24][25][26][27][28] with good anchoring and easy recycling, leading to a large variety of possible chemical reactions. [29] Among the organic transformations that take place in the presence of PCs, the obtaining of substituted phenols presents important industrial applications. Phenols are used in manufacturing polymers and producing biologically active ingredients with pharmaceutical and agrochemical applications.…”

“…Moreover, silica nanoparticles were used as supports, because they present several advantages such as chemical inertness, transparency, good biocompatibility and easy functionalization of their surface. On account of these properties, silicon‐type material can host diverse PCs (e. g., metals and organic dyes), [23–28] with good anchoring and easy recycling, leading to a large variety of possible chemical reactions [29] …”

Immobilized Rose Bengal as Photocatalyst for Metal‐Free Thiocyanation of Azaheterocycles under Continuous Flow Conditions

“…Unfortunately, the low recyclability and, in some cases, the high cost of these photocatalysts, impose remarkable limitations on scale-up for their industrial applications. One possibility to solve this issue consists in anchoring the photocatalyst onto an inert support; [28] in this way, the catalytic species could be easily removed upon a completed reaction, facilitating the work-up and, possibly, the reuse in further transformations. [29,30] Few examples of Eosin Y [31 -34] and Rose Bengal [34][35][36][37][38][39][40][41][42] supported materials have been already reported in literature, and their use in photochemical applications confirm that the treatment and purification of the target compound have been greatly facilitated.…”