Wang, Yuexin; Zhou, Jun; Ma, Xiaoming; Li, Xia; Lang, Xianjun published the artcile< Cooperative Photocatalysis with 4-Amino-TEMPO for Selective Aerobic Oxidation of Amines over TiO2 Nanotubes>, Computed Properties of 3959-07-7, the main research area is titania nanotube semiconductor catalyst; 4-amino-TEMPO; Sodium 6,7-dihydroxynaphthalene-2-sulfonate; Surface complexes; TiO2 nanotubes; Visible light photocatalysis.
Attaching π-conjugated mols. onto TiO2 can form surface complexes that could capture visible light. However, to make these TiO2 surface complexes durable, integrating 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) or its analogs as a redox mediator with photocatalysis is the key to constructing selective chem. transformations. Herein, sodium 6,7-dihydroxynaphthalene-2-sulfonate (DHNS) was obtained by extending the π-conjugated system of catechol by adding a benzene ring and a substituent sodium sulfonate (-SO3-Na+). The DHNS-TiO2 showed the best photocatalytic activity towards the blue light-induced selective aerobic oxidation of benzylamine. Compared to TEMPO, 4-amino-2,2,6,6-tetramethylpiperidine-1-oxyl (4-amino-TEMPO) could rise above 70% in conversion of benzylamine over the DHNS-TiO2 photocatalyst. Eventually, a wide range of amines could be selectively oxidized into imines with atm. O2 by cooperative photocatalysis of DHNS-TiO2 with 4-amino-TEMPO. Notably, superoxide (O2•-) is crucial in coupling the photocatalytic cycle of DHNS-TiO2 and the redox cycle of 4-amino-TEMPO. This work underscores the design of surface ligands for semiconductors and the selection of a redox mediator in visible light photocatalysis for selective chem. transformations.
Chemistry – An Asian Journal published new progress about ESR (electron spin resonance). 3959-07-7 belongs to class bromides-buliding-blocks, and the molecular formula is C7H8BrN, Computed Properties of 3959-07-7.
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary