Variable temperature MAS NMR studies of the phase transition in NaTCNQ
Abstract
13 C MAS NMR spectra of the sodium salt of the radical anion of 7,7,8,8-tetracyanoquinodimethane (Na TCNQ) show changes in both chemical shift position and linewidth of some resonances with temperature, and provide information about the nature of a phase transition at ca. 333 K.