Electronic supplementary materialUV, IR, NMR spectra etc. from Carbon nitride supported copper nanoparticles: light-induced electronic effect of the support for triazole synthesis

The composite framework of graphitic carbon nitride (<i>g</i>CN) 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 <i>g</i>CN 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-TiO<sub>2</sub> 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.