Carbon nitride supported copper nanoparticles: light-induced electronic effect of the support for triazole synthesis

Abstract

The composite framework of graphitic carbon nitride (gCN) supported copper nanoparticle can act as a high-performance photoreactor for the synthesis of 1,2,3-triazole derivatives under light irradiation in the absence of alkaline condition. The photoactivity of gCN originates from an electron transition from the valence band to the conduction band, in the presence of photon energy, and the hot electron acts as a scavenger of the terminal proton of the alkyne molecule to facilitate the formation of copper acetanilide complex. In this study, we have performed the experiment under a different photonic environment, including dark condition, and in the presence and absence of base. A comparative study was also executed using Cu-TiO2 system, as a reference material, in the support of our proposed mechanism. The recycling performance and the photocorrosion effect of the catalyst have also been reported in this study.

Promotional role of gold in electrochemical methanol oxidation

“…Various solid materials, such as carbon, clay, and metal oxide, have also been employed as a support system for the metal catalysts where strong metalsupport interaction prevents the metal-metal interaction and seizes the agglomeration process. In our earlier studies, we showed the carbon nitride (CN) could also act a successful support material for the metal catalyst for various heterogeneous reactions [33][34][35][36].…”

Free‐radical‐mediated copper‐catalyzed triazole formation under UV‐irradiation

“…Copper serves as a catalyst for the title reaction, whereas MPEG scavenges the free‐radicals with the formation of stable carbon‐centered free‐radicals that abstract the H‐atom from the alkyne molecule by means of a hydrogen atom transfer mechanism, and finally proceed for the triazole product in the presence of an azide molecule. In association with our ongoing research on the fabrication of effective catalysts for the cyclo‐addition of azide and alkyne molecules, further efforts will undertake in future for the development of new materials as catalyst to perform the similar kind of reactions by involving the heterocycle substituted azide molecules.…”

“…Due to the light excitation, the conduction band electron of the Cu (I) sulfide quantum dot acts as a scavenger of the terminal proton of the alkyne in the presence of organic azide with the formation of 1,4‐disubstituted 1,2,3‐triazoles, where the Cu (I) species of Cu 2 S acts as a catalyst for the reaction . We also have demonstrated that the composite of copper nanoparticles and carbon nitride performs as an effective system for the cycloaddition reaction between azide and alkyne molecules under UV‐radiation conditions where copper nanoparticles serve as active catalyst and the photoactive support material (carbon nitride) plays the role of a promoter …”

“…In association with our ongoing research on the development of efficient catalysts for the azide‐alkyne cycloaddition reaction, we have found the crucial role of light energy on the yield of the reaction . Due to the light excitation, the conduction band electron of the Cu (I) sulfide quantum dot acts as a scavenger of the terminal proton of the alkyne in the presence of organic azide with the formation of 1,4‐disubstituted 1,2,3‐triazoles, where the Cu (I) species of Cu 2 S acts as a catalyst for the reaction .…”

Transport mechanism of copper sulfide embedded carbon nitride thin films: a formation free memristor

“…Due to these merits, carbon nitride (CN) has been applied as a support material for a wide-range of inorganic nanomaterials for diverse applications. 24 However, the application of carbon nitride for the fabrication of resistive random-access memory (RRAM) devices has rarely been reported. A device made with CN powder, as an active layer, was reported for RRAM applications with a switching ratio o100.…”