Details

Autor(en) / Beteiligte

• Zou, Guangcheng
• Cao, Rui
• Cui, Conghui
• Luo, Yuqiang
• Huang, Chen
• Cui, Xinwei
• Wang, Zhiwen
• Song, Yujie

Titel

Photocatalytic one-pot alkylation of nitrobenzene with benzyl alcohol for the precise synthesis of -benzylideneaniline over F-doped BiMoO nanosheets

Ist Teil von

• Catalysis science & technology, 2023-07, Vol.13 (13), p.3916-3926

Erscheinungsjahr

2023

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Monolayer Bi 2 MoO 6 nanosheets doped with F atoms (F-BMO-NSs) were developed as catalysts for the one-pot alkylation of nitrobenzene with benzyl alcohol. 95.88% conversion of nitrobenzene coupled with 99.98% selectivity of n -benzylideneaniline was achieved over the F 0.04 -BMO-NSs under visible light irradiation and 1 atm N 2 at room temperature. XPS and EPR results suggested that F doping not only produced enhanced Lewis acid sites (Bi 3+ and Mo 6+ ), but also generated Lewis base sites (Mo 5+ ). In situ FTIR spectra revealed that benzyl alcohol would be selectively adsorbed on the enhanced Lewis acid sites via Bi 3+ (Mo 6+ ) OH-C- interface coordination, resulting in the activation of HO-C-. Moreover, nitrobenzene would be chemisorbed on the Mo 5+ basic sites via Mo 5+ NO 2 coordination, inducing charge transfer from Mo 5+ to -NO 2 . Under visible light irradiation, hydrogen transfer takes place from the chemisorbed benzyl alcohol to nitrobenzene generating benzaldehyde and aniline, finally coupling to form the imine. Based on these surface cooperated functional sites, a synergistic mechanism has been proposed to elucidate the accurate structure-performance relationship. This work provides a new perspective for the design of high activity, high selectivity and high stability photocatalysts for the precise synthesis of imines. Selective chemisorption and activation of benzyl alcohol and nitrobenzene on F 0.04 -BMO-NSs via interface coordination Bi 3+ (Mo 6+ ) OH-C- and Mo 5+ O 2 N. Hydrogen transfer takes place from the alcohol to nitrobenzene precisely forming N -benzylideneaniline.