13C High Resolution NMR Study of Methyl-Diethyl Sulfonium TCNQ 1:2 Complex |
| L. Firleja, J. Pęcherzb and P. Berniera aGroupe de Dynamique des Phases Condensées, Université Montpellier II, URA 233 34095 Montpellier, France bCenter of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Łódź, Poland |
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| Solid state high resolution 13C NMR studies of a 1 : 2 charge transfer complex of TCNQ with diethyl-methyl sulfonium S + Et2Me(TCNQ)2 are presented. The metallic shifts of TCNQ resonances are interpreted as due to the Pauli paramagnetism of conducting electrons and quantitatively connected with inhomogeneous spin density distribution over (TCNQ2)¯ dimer. A singularity of NMR parameters at T = 330 K is observed and described as a structural phase transition occurring in the S + Et2Me cation sublattice. |
| DOI: 10.12693/APhysPolA.87.829 PACS numbers: 76.60.-k, 76.30.-v |