摘要
本文利用IR和XRD研究了DMSO分子(二甲基亚砜)在蒙脱石层间的可能取向结构.在d_(001)为1.89nm的DMSO-Mg-蒙脱石复合物层间,DMSO分子是通过碳、碳、硫棱锥面吸附在层表面上,氧原子悬挂在层空间,并与层间水形成氢键,这种吸附可归属为物理吸附,在d_(001)为1.84nm的层空间,DMSO分子中棱锥点上的硫原子与骨架层表面互相作用,氧原子与Mg^(2+)离子络合.
The structure and orientation of DMSO molecules in the interlayer of montmorillonite was investigated by FTIR and XRD. The adsorbed DMSO molecules were separated into physisorption and chemisorption. The former corresponded to 1.892nm phase on 001 plane. DMSO molecules were adsorbed on the sheet of Si-O through the rhombus-cone plane of C.C. and S, oxygen atom hung in the interlayer space, and formed hydration bonding with water molecules. The later was for adsorbed DMSO molecules which directly coordinated to Mg^(2+) ion through oxygen atom. Sulphur atom at the rhombus-cone vertex interreacted with the sheet of Si-O, in this case, d_(001) was 1.8423nm.
