Amine Synthesis by Using Semiconductor Powder Photocatalysts and Its Reaction Mechanism

Abstract

Details in the reaction mechanism for ethylation of ammonia with PtiTiO₂ photocatalysts were described. The sequential ethylation in Fig.9 was clearly shown experime ntally (Fig.4). The ratio of bimolecular rate constants obtained from a simulation (Fig.5) was 1: 417: 175 for ethylation of ammonia: ethylamine: diethylamine. Reaction mixture in NMR sam ple tube with catalyst was irradiated with the apparaitus shown in Fig.2 and analyzed by using NMR spectroscopy (Fig.8). Quantum yield for total amount of ethylated products was 6% on 360-nm irradiation (Fig.10).