Molecular structure of dimethyl sulfoxide in DMSO-intercalated kaolinites at 298 and 77

Ray L. Frost, Janos Kristof, Erzsebet Horvath, J. Theo Kloprogge

Research output: Contribution to journalArticle

39 Citations (Scopus)


The molecular structure of dimethyl sulfoxide at liquid nitrogen temperature has been obtained from the Raman spectra of dimethyl sulfoxide intercalated kaolinites by the use of Raman microprobe and a low temperature thermal stage. Raman bands at 2917 and 2935 cm -1 for the symmetric stretching and four bands at 2999, 3015, 3021, and 3029 cm -1 for the antisymmetric stretching are observed at 298 K. At liquid nitrogen temperature, five symmetric stretching frequencies at 2882, 2907, 2917, 2920, and 2937 cm -1 and six antisymmetric stretching frequencies at 2986, 2994, 3000, 3012, 3023, and 3032 cm -1 are observed for the DMSO-intercalated low defect kaolinite. Differences in the position and number of bands are observed for DMSO between the DMSO-intercalated low and high defect kaolinites. The in-plane methyl-bending region shows two Raman bands at 1411 and 1430 cm -1 at 298 K and 1411 and 1426 cm -1 at 77 K. The S=O stretching region shows bands in the 298 K spectra at 1066, 1023, and 1010 cm -1 and at 1010, 1023, and 1062 cm -1 in the 77 K spectra. These bands are assigned to the free monomeric S=O group and two different polymeric S=O groups. The C-S vibrations also show increased complexity upon obtaining spectra at 77 K. The additional bands of DMSO are attributed to the different molecular structures of DMSO in the DMSO-intercalated kaolinites.

Original languageEnglish
Pages (from-to)9654-9660
Number of pages7
JournalJournal of Physical Chemistry A
Issue number48
Publication statusPublished - Dec 2 1999

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Fingerprint Dive into the research topics of 'Molecular structure of dimethyl sulfoxide in DMSO-intercalated kaolinites at 298 and 77'. Together they form a unique fingerprint.

  • Cite this