DMPO/CH(OH)CH3 | 40936-18-3

• 英文名称: DMPO/CH(OH)CH3
• CAS: 40936-18-3
• 化学式: C₈H₁₆NO₂
• 分子量: 158.221
• InChiKey: WLSJGVPHIYHTCX-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  None
• 重原子数：
  None
• 可旋转键数：
  None
• 环数：
  None
• sp3杂化的碳原子比例：
  None
• 拓扑面积：
  None
• 氢给体数：
  None
• 氢受体数：
  None

反应信息

• 作为产物：
  描述：

  5,5-二甲基-1-吡咯啉-N-氧化物 、 乙醇 在 多巴胺 、 air 、 hematoporphyrin 作用下， 以 水 为溶剂， 生成 DMPO/CH(OH)CH3
  参考文献：
  名称：

  Singlet Oxygen–mediated Hydroxyl Radical Production in the Presence of Phenols: Whether DMPO–·OH Formation Really Indicates Production of ·OH?¶

  摘要：

  The reaction of singlet oxygen (O-1(2)) generated by ultraviolet-A (UVA)-visible light (lambda > 330 nm) irradiation of air-saturated solutions of hematoporphyrin with phenolic compounds in the presence of a spin trap, 5,5-dimethyl-1-pyrroline-N-oxide (DMPO), gave an electron spin resonance (ESR) spectrum characteristic of the DMPO-hydroxyl radical spin adduct (DMPO-(OH)-O-.). In contrast, the ESR signal of 5,5-dimethyl-2-pyrrolidone-N-oxyl, an oxidative product of DMPO, was observed in the absence of phenolic compounds. The ESR signal of DMPO-(OH)-O-. decreased in the presence of either a (OH)-O-. scavenger or a quencher of O-1(2) and under anaerobic conditions, whereas it increased depending on the concentration of DMPO. These results indicate both O-1(2) and DMPO-mediated formation of free (OH)-O-. during the reaction. When DMPO was replaced with 5-(diethoxyphosphoryl)-5-methyl-1-pyrroline-N-oxide (DEPMPO), no DEPMPO adduct of oxygen radical species was obtained. This suggests that 102, as an oxidizing agent, reacts little with DEPMPO, in which a strong electron-withdrawing phosphoryl group increases the oxidation potential of DEPMPO compared with DMPO. A linear correlation between the amounts of DMPO-(OH)-O-. generated and the oxidation potentials of phenolic compounds was observed, suggesting that the electron-donating properties of phenolic compounds contribute to the appearance of (OH)-O-.. These observations indicate that O-1(2) reacts first with DMPO, and the resulting DMPO-O-1(2) intermediate is immediately decomposed/reduced to give (OH)-O-.. Phenolic compounds would participate in this reaction as electron donors but would not contribute to the direct conversion of O-1(2) to (OH)-O-.. Furthermore, DEPMPO did not cause the spin-trapping agent-mediated generation of (OH)-O-. like DMPO did.

  DOI：

  10.1562/0031-8655(2003)077<0165:somhrp>2.0.co;2

文献信息

• ESR study of spin adducts of the direct electrocatalytic decomposition of light aliphatic alcohols in a polymer electrolyte fuel cell
  作者：M. I. Valitov、I. R. Nizameev、D. M. Kadirov、Sh. N. Mirkhanov

  DOI：10.1007/s11172-010-0276-z

  日期：2010.8

  Spin adducts of methanol and ethanol electrocatalytic oxidation were detected by the spin trap method using a tiny ?2/O2 fuel cell (FC) designed for ESR in situ with a Nafion/Pt membrane electrode assembly. Spin adducts of intermediates of the direct electrooxidation of ethanol, which have not been observed earlier, were obtained by the variation of oxidation conditions, in particular, the FC potential

  甲醇和乙醇电催化氧化的自旋加合物通过自旋阱方法检测，使用为 ESR 设计的微型 2/O2 燃料电池 (FC) 和 Nafion/Pt 膜电极组件。乙醇直接电氧化中间体的自旋加合物是通过氧化条件的变化，特别是 FC 电位的变化获得的。通过监测诊断曲线电位3-电流密度、功率密度3-电流密度和效率-功率密度来控制FC的工作。
• Chemical effects of ultrasound on aqueous solutions. Formation of hydroxyl radicals and hydrogen atoms
  作者：Keisuke Makino、Magdi M. Mossoba、Peter Riesz

  DOI：10.1021/j100231a020

  日期：1983.4