• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >The inhibition of N2O5 hydrolysis in sulfuric acid by 1-butanol and 1-hexanol surfactant coatings
【24h】

The inhibition of N2O5 hydrolysis in sulfuric acid by 1-butanol and 1-hexanol surfactant coatings

机译：1-丁醇和1-己醇表面活性剂涂层对硫酸中N2O5水解的抑制作用

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Gas-liquid scattering experiments are used to measure the fraction of N2O5 molecules that are converted to HNO3 after colliding with 72 wt % H2SO4 containing 1-hexanol or 1-butanol at 216 K. These alcohols segregate to the surface of the acid, with saturation coverages estimated to be 60% of a close-packed monolayer for 1-hexanol and 44% of a close-packed monolayer for 1-butanol. We find that the alkyl films reduce the conversion of N2O5 to HNO3 from 0.15 on bare acid to 0.06 on the hexyl-coated acid and to 0.10 on the butyl-coated acid. The entry of HCl and HBr, however, is enhanced by the hexanol and butanol films. The hydrolysis of N2O5 may be inhibited because the alkyl chains restrict the transport of this large molecule and because the alcohol OH groups dilute the surface region, suppressing reaction between N2O5 and near-interfacial H3O+ or H2O. In contrast, the interfacial alcohol OH groups provide additional binding sites for HCl and HBr and help initiate ionization. These and previous scattering experiments indicate that short-chain alcohol surfactants impede or enhance sulfuric acid-mediated reactions in ways that depend on the chain length, liquid phase acidity, and nature of the gas molecule.
机译：气液散射实验用于测量N2O5分子在216 K下与72 wt％的含有1-己醇或1-丁醇的H2SO4碰撞后转化为HNO3的比例。这些醇饱和地偏向酸的表面覆盖率估计为1-己醇的密排单层的60％和1-丁醇的密排单层的44％。我们发现，烷基膜将N2O5到HNO3的转化率从裸酸上的0.15降低到己基包被的酸上的0.06，丁基包被的酸上的0.10。但是，己醇和丁醇薄膜会增加HCl和HBr的进入。 N2O5的水解可能受到抑制，因为烷基链限制了该大分子的运输，并且因为醇OH基团稀释了表面区域，从而抑制了N2O5与近界面H3O +或H2O之间的反应。相反，界面醇的OH基团为HCl和HBr提供了额外的结合位点，并有助于引发电离。这些和先前的散射实验表明，短链醇表面活性剂以取决于链长，液相酸度和气体分子性质的方式阻止或增强硫酸介导的反应。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号