Solvent-free hydroamination of phenylacetylene by plasmonic gold nanoparticles coupled with a TiO22D photonic layer on nanotube arrays

Authors：Meng, Jie; Xiao, Yunheng; Huang, Yiming; Liu, Xuguang; Zhao, Jian^*

Source：New Journal of Chemistry, 2020, 44(40): 17289-17295.

DOI：10.1039/d0nj04132g

• SELECTIVE AEROBIC OXIDATION
• EXPOSED 001 FACETS
• VISIBLE-LIGHT
• ANATASE TIO2
• PHOTOCATALYTIC HYDROAMINATION
• CHARGE SEPARATION
• SURFACE-STRUCTURE
• AU/TIO2
• EFFICIENT
• AMINES

Hydroamination of alkynes provides a direct and atom-economical access to highly valuable organic nitrogen molecules. The design of a green catalytic process has attracted considerable attention. Here, wein situtune a TiO(2)2D photonic crystal (PC) layer on nanotube arrays (NTs)viathe anodization process and selectively deposit small gold nanoparticles (Au NPs) with an average size of similar to 7.5 nm into the 2D PC layer using the NaBH(4)reduction method. The as-prepared plasmonic samples show superior activity for the solvent-free hydroamination of phenylacetylene, illuminating with visible-light from both sides simultaneously. The 2D PC layer exhibits a much higher intensity ratio of anatase (004)/(101) than the NTs without the 2D PC layer and enhances the light-harvesting efficiency of plasmonic Au NPs, resulting in improved activity with a TON 294.8 and TOF 42.1 h(-1)of the imine product yield based on the Au molar content.