首页> 外文期刊>RSC Advances >Molecular probe dynamics and free volume heterogeneities in n-propanol confined in a regular MCM-41 matrix by ESR and PALS
【24h】

Molecular probe dynamics and free volume heterogeneities in n-propanol confined in a regular MCM-41 matrix by ESR and PALS

机译:通过ESR和PALS在常规MCM-41矩阵中限制正丙醇中的分子探针动力学和自由体积异质性

获取原文
           

摘要

A combined investigation of the spin probe TEMPO mobility and the free volume holes in n -propanol ( n -PrOH) confined in a regular virgin MCM-41 matrix by means of ESR or PALS techniques, respectively, is reported. Dynamics of spin probe TEMPO alters at several characteristic ESR temperatures which are close to the characteristic PALS ones reflecting the changes in o -Ps annihilation and the related free volume. Correlations between these characteristic ESR and PALS temperatures indicate the common physical origins of the respective changes in the free volume expansion and the TEMPO mobility in the confined liquid n -PrOH. The significant difference in dynamic heterogeneity of TEMPO after confinement and free volume dispersion reflect the strongly altered structural-dynamic relationships in the confined n -PrOH medium with respect to the bulk situation.
机译:报道了通过ESR或PALS技术分别在常规原始MCM-41基质中局限于常规原始MCM-41基质中狭窄的旋转探针速度和自由体积孔的组合研究。旋转探针速度动态在几个特征ESR温度下改变,靠近反映O -PS湮灭和相关自由体积的变化的特征性PALS温度。这些特征ESR和PALS温度之间的相关性表示自由体积膨胀和狭窄液体N -PHOH中的自由体积膨胀和节奏迁移率的常见物理起源。限制和自由体积分散后Tempo动态异质性的显着差异反映了群体情况的受限N -PROH培养基中的强烈改变的结构动态关系。

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