4.6 Article

Ultrasound and photo-assisted oxidation of toluene and benzyl alcohol with oxidovanadium(V) complexes

期刊

APPLIED CATALYSIS A-GENERAL
卷 638, 期 -, 页码 -

出版社

ELSEVIER
DOI: 10.1016/j.apcata.2022.118623

关键词

Oxidovanadium(V) complexes; Schiff base ligands; Sonochemistry; Ultrasounds; Photocatalysis; Oxidation of toluene and benzyl alcohol

资金

  1. Fundacao para a Ciencia e Tecnologia (FCT) [UIDB/00100/2020]
  2. Instituto Politecnico de Lisboa
  3. RUDN University Strategic Academic Leadership Program
  4. [PTDC/QUI-QIN/29778/2017]
  5. [IPL/2021/WASTE4CAT_ISEL]

向作者/读者索取更多资源

The aroylhydrazone Schiff bases were used to synthesize dinuclear complexes, and their catalytic performance for peroxidative oxidation was investigated. The results showed that the ultrasound-assisted method had better reaction efficiency.
The aroylhydrazone Schiff bases 2-hydroxy-N'-(1-(pyrazin-2-yl)ethylidene)benzohydrazide and N,N'-bis(2-hydroxybenzylidene)oxalohydrazide, have been used to synthesize the dinuclear complexes [VO(HL1)(mu-O)](2) (1) and [{VO(OEt)(EtOH)}(2)(L-2)] (2)center dot 2 H2O. Complex 1 is newly synthesized and 2 was reported earlier. Structural characterization of 1 was accomplished by single crystal X-ray diffraction, elemental analysis, and IR spectroscopy. The catalytic performance of both vanadium complexes was investigated for the peroxidative oxidation of toluene and benzyl alcohol through advanced oxidation processes (AOPs). Besides the conventional heating (CONV), other energy inputs, i.e., ultrasound-assisted (US_PROBE and US_BATH) and photo-assisted (PHOTO) methods were explored. The effects of a series of parameters were studied to improve the catalytic reaction. For the peroxidative oxidation (H2O2, 30% aq.) of toluene for 1 h at room temperature, the oxygenated product yields followed the trend: US_PROBE (8.1%) > US_BATH (5.4%) > PHOTO (3.9%) > CONV (no oxygenated products). The effect of other energy inputs (besides conventional heating) in the formation of oxygenated products is even more pronounced in the peroxidative oxidation of benzyl alcohol carried out for 1 h at room temperature, with the following trend: US_PROBE (59.5%) > PHOTO (30.9%) US_BATH (21.5% of oxygenated products) > CONV (no oxygenated products detected). Complexes 1 and 2 are promising catalysts for the conversion of toluene and benzyl alcohol under very light reaction conditions when assisted by ultrasound irradiation, and this sonochemical approach is disclosed as a promising advanced oxidation process (AOP).

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.6
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据