کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
40221 | 45846 | 2013 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Highly efficient divanadium(V) pre-catalyst for mild oxidation of liquid and gaseous alkanes Highly efficient divanadium(V) pre-catalyst for mild oxidation of liquid and gaseous alkanes](/preview/png/40221.png)
• New binuclear V(V) complex bearing an NO2-donor Schiff base ligand is synthesized.
• This compound is highly active catalyst precursor in the oxidation of alkanes by H2O2.
• 2-Pyrazinecarboxylic acid acts as an efficient co-catalyst.
• High yields (up to 45% based on alkanes) and TONs (up to 7800) are achieved.
• Oxidation proceeds via radical mechanism with participation of hydroxyl radicals.
A new binuclear oxovanadium(V) complex bearing an NO2-donor Schiff base ligand, [{VO(EtO)(EtOH)}2(1κ2O,κN:2κ2O,κN-L)]·2H2O (H4L = bis(2-hydroxybenzylidene)oxalohydrazonic acid) was prepared and fully characterized by IR, 1H NMR and electronic spectroscopies, elemental analysis and single crystal X-ray diffraction. In the presence of 2-pyrazinecarboxylic acid (PCA) or another acid promoter, this compound acts as a highly efficient pre-catalyst towards the oxidation of gaseous and liquid alkanes by aqueous H2O2 under mild conditions, in aqueous MeCN. Total yields of oxygenates up to 45% and overall turnover numbers up to 7.8 × 103 are achieved.
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Journal: Applied Catalysis A: General - Volumes 460–461, 10 June 2013, Pages 82–89