The synthesis and transport properties of the complex salt (TMPD) (TCNQ)2

The syntheses and transport properties of the complex salt (TMPD) (TCNQ)2 are described. At high temperatures (T≳100°K), the complex is a magnetic semiconductor with transport properties intermediate between those found in the highly conducting and poorly conducting TCNQ salts. The complex undergoes a transition below 50−60°K to a state exhibiting singlet−triplet behavior with weakly alternating exchange coupling.