Kelleher B P, Sutton D, O'Dwyer T F
Chemical and Environmental Science Dept., University of Limerick, Limerick, Ireland.
J Colloid Interface Sci. 2002 Nov 15;255(2):219-24. doi: 10.1006/jcis.2002.8666.
N-methylformamide (NMF) and 1-methyl-2-pyrrolidone (NMP) were intercalated with kaolinite, characterized, and deintercalated for analysis (the NMP was intercalated after expansion of the kaolinite layers with NMF). The dynamics of guest molecules within the kaolinite lamellae was studied by means of FT-IR and liquid state (1)H and (13)C NMR on the NMF and NMP before intercalation and also on the deintercalated solutions. Both compounds were deintercalated using water. The FT-IR spectra show no significant differences before and after intercalation, for either NMF or NMP, indicating that there is no change in molecular arrangement as a result of intercalation. (1)H and (13)C NMR investigations supported the findings of the FT-IR and indicated that structural arrangement and orientation of the guest species remain the same after deintercalation. This work provides evidence that intercalation is due to weak physical bonding.
将N - 甲基甲酰胺（NMF）和1 - 甲基 - 2 - 吡咯烷酮（NMP）插入高岭土中，进行表征，并脱插层以进行分析（在用NMF使高岭土层膨胀后再插入NMP）。通过傅里叶变换红外光谱（FT - IR）以及液态氢核磁共振（¹H NMR）和碳 - 13核磁共振（¹³C NMR）研究了高岭土片层内客体分子在插入NMF和NMP之前以及脱插层溶液中的动力学。两种化合物均用水进行脱插层处理。FT - IR光谱显示，对于NMF或NMP，插入前后均无显著差异，这表明插入过程不会导致分子排列发生变化。¹H NMR和¹³C NMR研究支持了FT - IR的结果，并表明脱插层后客体物种的结构排列和取向保持不变。这项工作提供了证据，证明插层是由于弱物理键合引起的。
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