Influence of Hydrazine on the Vibrational Modes of Kaolinite
Influence of Hydrazine on the Vibrational Modes of Kaolinite
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DOI：
10.1346/ccmn.1990.0380202
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发表时间：
1990-04
影响因子：
2.2
通讯作者：
C. Johnston;D. A. Stone
中科院分区：
文献类型：
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作者：
C. Johnston;D. A. Stone
采用拉曼光谱、傅里叶变换红外光谱和X射线粉末衍射技术研究了肼对高岭石振动模式的影响。在拉曼和红外光谱中观察到插层OH伸缩和形变带的强振动扰动。插层后，拉曼和IR活性OH伸缩带的强度显著降低;拉曼带的强度比IR带降低到更大的程度。变形带也强烈扰动联氨的存在下，在层间区域。抽真空后，在3628和912 cm−1处观察到两个新的条带，表明在真空下存在不同的复合物结构构象。用XRD得到类似的结果，在高岭土-肼（KH）络合物的抽空时，d（001）值从10.4降低到9.6 μ m。插层从10.4到9.6 cm-1的部分塌陷可能是由于肼的-NH 2部分键控到硅氧烷双三方腔中，如内部-OH带从3620到3628 cm-1的蓝移所示。因此，结构OH振动模式可能是有用的探针胺与粘土矿物表面的相互作用。
Raman and Fourier-transform-infrared (FTIR) spectroscopic methods and X-ray powder diffraction (XRD) techniques have been used to study the influence of hydrazine on the vibrational modes of kaolinite. Strong vibrational perturbations of the OH-stretching and -deformation bands were observed in the Raman and FTIR spectra on intercalation. The intensities of the Raman- and IR-active OH-stretching bands decreased significantly upon intercalation; the intensities of the Raman bands were reduced to a greater extent than the IR bands. The deformation bands were also strongly perturbed by the presence of hydrazine in the interlamellar region. Upon evacuation of the intercalate, two new bands at 3628 and 912 cm−1 were noted, indicating the presence of a different structural conformation of the complex under vacuum. Similar results were obtained using XRD, on evacuation of the kaolinite-hy-drazine (KH) complex the d(001) value decreased from 10.4 to 9.6 Å. Partial collapse of the intercalate from 10.4 to 9.6 Å was probably due to keying of the -NH2 moiety of hydrazine into the siloxane ditrigonal cavity, as indicated by a blue-shift of the inner-OH band from 3620 to 3628 cm-1. Structural OH vibrational modes may therefore be useful probes of amine interactions with clay mineral surfaces.