Spectra of kaolinite hydroxyls in dimethylsulphoxide-intercalated kaolinites at 77 K

The kaolinites from Kiralyhegy and Szeg in Hungary, examples of a low- and high-defect kaolinite were intercalated by mixing 300 mg of the kaolinite in 5 cm3 of anhydrous DMSO at 25°C using a magnetic stirrer for 80 h. Raman spectra were measured using a Renishaw Raman microprobe. Experimental details have been published previously (Frost R.L., Tran T.H. & Kristof, J. (1997) Intercalation of an ordered kaolinite — a Raman microscopy study. Clay Miner. 32, 587–59 & Johansson U., Frost R.L., Forsling W. & Kloprogge J.T. (1998) Raman spectroscopy of the kaolinite hydroxyls at 77 K. Appl. Spectrosc. 52, 1277–1282.)

Figure 1 is Raman spectra in the OH- stretching region of DMSO- intercalcated (a) high-defect kaolinite at 298 K, (b) low-defect kaolinite at 298 K, (c) high-defect kaolinite at 77 K and (d) low-defect kaolinite at 77 K. Figure 2 is the Raman spectrum of the OH-stretching region of low-defect kaolinite at 77 and 298 K. Figure 3 shows a band component analysis of the Raman spectrum in the OH-stretching region of DMSO-intercalated low-defect kaolinite at 298 K. Figure 4 is Band component analysis of the Raman spectrum in the OH-stretching region of DMSO-intercalated, low-defect kaolinite at 77 K. Figure 5 shows band component analysis of the Raman spectrum in the OH-stretching region of DMSO-intercalated, high-defect kaolinite at 298 K.

来自匈牙利基拉利海吉和塞格的粘土岩，低缺陷和高缺陷的粘土岩样本通过将300毫克粘土岩与5立方厘米无水DMSO在25摄氏度下混合，并使用磁力搅拌器搅拌80小时进行层间插层。采用Renishaw拉曼显微探针进行了拉曼光谱测量。实验细节已在前人研究中发表（Frost R.L., Tran T.H. & Kristof, J. (1997) 有序粘土岩的层间插层——拉曼显微学研究。粘土矿物学，32，587-59 & Johansson U., Frost R.L., Forsling W. & Kloprogge J.T. (1998) 77 K下粘土岩羟基的拉曼光谱。应用光谱学，52，1277-1282）。图1展示了DMSO层间插层粘土岩在298 K的OH伸缩区域拉曼光谱，（a）高缺陷粘土岩，（b）低缺陷粘土岩；（c）高缺陷粘土岩在77 K，（d）低缺陷粘土岩在77 K。图2为低缺陷粘土岩在77 K和298 K的OH伸缩区域拉曼光谱。图3展示了298 K下DMSO层间插层低缺陷粘土岩OH伸缩区域拉曼光谱的带成分分析。图4为77 K下DMSO层间插层低缺陷粘土岩OH伸缩区域拉曼光谱的带成分分析。图5展示了298 K下DMSO层间插层高缺陷粘土岩OH伸缩区域拉曼光谱的带成分分析。