Knight shift and inhomogeneous distribution of the spin density in the quasi-one-dimensional disordered conductor Qn(TCNQ)2
Vainrub A. M., Heinmaa I. A., Alia M. A., Viya S. Kh., Lippmaa E. T.
The high-resolution NMR spectrum and the relaxation of carbon-13 nuclei in Qn(TCNQ)2 have been studied. The results reveal a broadening, caused by a structural disorder, of a line with a Knight shift. The distribution function of the electron spin density has been measured. The spin density varies by a factor of five at the various TCNQ molecules.