Infrared study of ?OD modes in isotopically dilute (HDO molecules) Na2Me(XO4)2ž2H2O with matrix-isolated X'O42- guest ions (Me = Mn, Co, Ni, Cu, Zn, Cd, and X = S, Se)
- Author(s)
- Donka Stoilova, Manfred Wildner, Violeta G Koleva
- Abstract
The infrared spectra of related compounds with krošhnkite-type chains Na2Me(XO4)2ž2H2O (Me = Mn, Co, Ni, Cu, Zn, Cd, and X = S, Se) containing matrix-isolated X'O4-2 guest ions and HDO molecules are presented and discussed in the region of the OD stretching modes. The strength of the hydrogen bonds formed in the compounds under study are discussed in terms of the hydrogen bond acceptor strength of the SO42- and SeO42- ions, the respective OwžžžO bond lengths, the metal-water interactions (synergetic effect), the repulsion potential of the lattice (reduced unit-cell volume), the hydrogen bond acceptor capability of the oxygen atoms. The frequencies of the uncoupled ?OD stretches indicate the formation of stronger hydrogen bonds in the selenate series as compared to the respective compounds of the sulfate one due to the stronger hydrogen bond acceptor capability of the SeO42- ions than that of the SO42- ions. The frequency shifts of ?OD corresponding to the guest ions to higher or lower wavenumbers as compared to the parent compounds (i.e. SO42- guest ions in Na2Me(SeO4)2ž2H2O and SeO42- guest ions in Na2Me(SO4)2ž2H2O, respectively) are due to the translatory and rotatory reorientation of the H2O molecules adjacent to the guest ions. Œ 2002 Elsevier Science B.V. All rights reserved.
- Organisation(s)
- Department of Mineralogy and Crystallography
- External organisation(s)
- Bulgarian Academy of Sciences (BAS)
- Journal
- Journal of Molecular Structure
- Volume
- 643
- Pages
- 37-41
- No. of pages
- 5
- ISSN
- 0022-2860
- Publication date
- 2002
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 1051 Geology, Mineralogy
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/b34d575c-6161-4c91-90b5-5e1ff19d9baa