An X-Ray Analysis of the Orientational Disorder of N-Methylphenazinium-TCNQ

The X-ray diffraction patterns of NMP-TCNQ show diffuse streaks along the c* direction. The analysis of the intensities of these streaks revealed that the orientation of NMP is one-dimensionally disordered along the c axis. The structure obtained indicates that the potential exerting on an electron moving in a column of TCNQ is not random, but can be expressed by a periodic function; this implies that NMP-TCNQ, can not be regarded as a disordered one-dimensional conductor. The periodicity of the potential means that the one-dimensional energy band must be filled.