So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Weerathunga, Helapiyumi; Tang, Cheng; Brock, Aidan J.; Sarina, Sarina; Wang, Tony; Liu, Qiong; Zhu, Huai-Yong; Du, Aijun; Waclawik, Eric R. researched the compound: Tri-n-octylphosphine Oxide( cas:78-50-2 ).Name: Tri-n-octylphosphine Oxide.They published the article 《Nanostructure Shape-Effects in ZnO heterogeneous photocatalysis》 about this compound( cas:78-50-2 ) in Journal of Colloid and Interface Science. Keywords: zinc oxide nanostructure heterogeneous photocatalysis shape effects; Benzyl alcohol oxidation; Facet-dependent catalysis; Photocatalyst; Zinc oxide. We’ll tell you more about this compound (cas:78-50-2).
Selective oxidation of alcs. is an essential reaction for fine chem. production Here, the photocatalytic oxidation of benzyl alc. by zinc oxide (ZnO) nanocrystals was investigated to clarify the mechanism of selective oxidation with this process. Reactivity when in contact with three distinct ZnO nanocrystal shapes: nanocones, nanorods and nanoplates, was studied in order to compare crystal facet-specific effects in the reaction system. The same non-hydrothermal and non-hydrolytic aminolysis method was used to synthesize all three nanocrystal shapes. The ZnO catalysts were characterized using by a range of techniques to establish the key properties of the prominent ZnO crystal facets exposed to the reaction medium. The ZnO nanocrystals photocatalyzed the benzyl alc. oxidation reaction when irradiated by a 370 – 375 nm LED output and each ZnO crystal morphol. exhibited different reaction kinetics for the oxidation reaction. ZnO nanocones displayed the highest benzyl alc. conversion rate while nanorods gave the lowest. This established a facet-dependent kinetic activity for the benzyl alc. reaction of (1011) > (0001) > (1010). Exptl. and d. functional theory computation results confirm that the {1011} facet is a surface that exposes undercoordinated O atoms to the reaction medium, which explains why the reactant benzyl alc. adsorption on this facet is the highest. Light irradiation can excite valence band electrons to the conduction band, which are then captured by O2 mols. to yield superoxide (O2·-). In a non-aqueous solvent, the photogenerated holes oxidise benzyl alc. to form a radical species, which reacts with O2·- to yield benzaldehyde. This results in 100% product selectivity for benzaldehyde, rather than the carboxylic acid derivative
As far as I know, this compound(78-50-2)Name: Tri-n-octylphosphine Oxide can be applied in many ways, which is helpful for the development of experiments. Therefore many people are doing relevant researches.
Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method