RT info:eu-repo/semantics/article T1 F,O,S-codoped graphitic carbon nitride as an efficient photocatalyst for the synthesis of benzoxazoles and benzimidazoles A1 Santiago Aliste, Alberto A1 Sánchez Hernández, Eva A1 Andrés Juan, Celia A1 Chamorro Posada, Pedro A1 Antorrena, Guillermo A1 Martín Gil, Jesús A1 Martín Ramos, Pablo K1 Photocatalysis K1 Asymmetric synthesis K1 Catalysis K1 Graphitic carbon nitride K1 Carbon composites K1 Carbono - Compuestos K1 Grafito K1 Spectroscopy K1 Infrared spectroscopy K1 Chemistry K1 Physical chemistry K1 Analytical chemistry K1 2210.01 Catálisis K1 2210 Química Física K1 2301 Química Analítica K1 2209.21 Espectroscopia K1 2301.08 Espectroscopia de Infrarrojos AB Graphitic carbon nitride (g-C3N4) is a metal-free heterogeneous catalyst that has attracted attention because of its good chemical stability, cost-effectiveness, and environmental friendliness. In the work presented herein, F,O,S-codoped carbon nitride was synthesized by heating a mixture of melamine cyanurate and trifluoromethanesulfonic acid at 550 °C for 50 min. The obtained product was characterized by transmission electron microscopy, infrared spectroscopy, X-ray powder diffraction, CHNS elemental analysis, total combustion-ion chromatography, X-ray photoelectron spectroscopy, scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy, and UV-Vis spectroscopy. Results point to an F,O,S-codoped g-C3N4. The material was applied as a photocatalyst for the formation of benzoxazoles and benzimidazoles by condensation–aromatization of 2-aminophenol or 1,2-phenylenediamine with suitable aldehydes (viz. benzaldehyde, 4-chlorobenzaldehyde, 2-naphthaldehyde, 2-hydroxybenzaldehyde, and 2-methoxybenzaldehyde), obtaining yields of up to 90% in 15 min under visible light irradiation, with good selectivity and reusability. Thus, the reported findings suggest that this F,O,S-codoped g-C3N4 may hold promise as a metal-free photocatalyst for the rapid synthesis of 2-arylbenzoxazoles and 2-arylbenzimidazoles. PB MDPI SN 2073-4344 YR 2023 FD 2023 LK https://uvadoc.uva.es/handle/10324/69402 UL https://uvadoc.uva.es/handle/10324/69402 LA eng NO Catalysts, 2023, Vol. 13, Nº. 2, 385 NO Producción Científica DS UVaDOC RD 12-nov-2024