Structure and Electronic States of Guest Molecules in Nano-spaces Studied by in-situ NMR

用固体核磁共振方法研究了氙气吸附在单壁纳米管上的固体核磁共振。H_2O_2处理后的热处理能有效地打开管内封闭的帽状气体和Xe气体。证明了氙气吸附的核磁共振谱是检测单壁碳纳米管开口、确定其管径及其S分布的一种非常简便的方法。用低温核磁共振和拉曼光谱研究了纯和K或Br2掺杂单壁碳纳米管聚集体(SWNTs)的电子态。此外，还研究了单壁碳纳米管的端部开口对插层能级和电子态演化的影响。用核磁共振方法研究了新型杂化材料--包裹富勒烯的单壁碳纳米管(C&lt；60&gt；@SWNTs和C&lt；70&gt；@SWNTs)的电子状态和分子动力学。

^<129>Xe-NMR of Xenon gas adsorbed single walled nanotubes were studied by solid state NMR. Heat treatment after H_2O_2 treatments was prove to be effect to open the cap and Xe gas confined inside the tube space. We proved that ^<129>Xe-NMR of Xenon gas adsorption is very easy way to check the opening the ends of SWNTs and determine the tube-diameter and it s distribution. Electronic states of pristine and K or Br_2 doped single wall carbon nanotube aggregates (SWNTs) were studied by both ^<13>C-NMR at low temperature and Raman spectroscopy. The effect of opening the ends of SWNTs on the intercalation level and the evolution of electronic states were also studied. Electronic states and molecular dynamics of new hybrid materials, single-wall carbon nanotubes encapsulating fullerenes (C_<60>@SWNTs and C_<70>@SWNTs) were investigated by ^<13>C-NMR.