摘要
用NMR方法研究固体表面吸附可获得吸附分子活动性的动态信息,加深对吸附分子与固体表面相互作用力性质的了解。~13CNMR谱虽灵敏度低于~1H谱,但分辨率优于~1H谱,对吸附态分子可得中等分辨率的谱图。本文用^(13)CNMR方法研究吡啶(Py)和2,6-二甲基吡啶(DMPy)在SiO_2、Al_2O_3、NaY及HY上的吸附。比较NMR谱线的宽度,可知在不同吸附体系中处于吸附态的分子具有不同的活动性。推测了DMPy吸附时空间受阻情况及与表面相互作用力的性质。
The dynamic information about adsorbed molecules on solid surface can be provided by using 13CNMR spectrometry. In the adsorption systems used, the line broadening of the spectrum is mainly due to the dipole-dipole interaction between adsorbed molecues, it is therefore clear that the comparison of linewidth between different adsorbed systems provide a qualitative measure for the mobility of adsorbed species. In the present paper the . adsorption behavior of pyridine and 2,6-dimethylpyridine on the surface of SiO2, A1ZOS, NaY, HY has been demonstrated by this technique. The nature of gas-solid interaction and the configuration of the adsorbed molecules were also discussed.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1989年第3期317-319,共3页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
关键词
吡啶
二甲基吡啶
吸附
碳13
NMR
^(13)C NMR, Adsorption, Pyridine, 2,6-Dimethylpyridine
