Single-component organic conductors based on neutral radicals containing the pyrazino-TCNQ skeleton
作者:Yoshiaki Tsubata、Takanori Suzuki、Tsutomu Miyashi、Yoshiro Yamashita
DOI:10.1021/jo00051a015
日期:1992.12
Pyrazino-TCNQ (1a) prepared from 5,8-diiodoquinoxaline (4a) is, like TCNQ itself, a strong electron acceptor and gives a stable anion radical salt as well as highly conductive charge-transfer crystals with donors. Substituted derivatives 1b-i were similarly prepared from 3,6-diiodo-1,2-phenylenediamine (5) as a common intermediate, and bulky substituents such as the phenyl or pyridyl groups have very little effect on either the redox properties or planar geometry of la. Neutral radicals 3d-g derived from pyridyl-substituted derivatives 1d-g, respectively, are open-shell donor-pi-acceptor systems with high electrical amphotericity designed as a new motif for single-component organic conductors. The powder conductivity of 3f was as high as 3.2 X 10(-5) S cm-1.