Electrical conducting and magnetic properties of cesium salts of radical anions of dimethyl- and diethyl substituted tetracyanoquinodimethanes, and tetracyanonaphthoquinodimethane

The Cs+ salts of radical anions (DMTCNQ−·, DETCNQ−· and TNAP−·) of dimethyl- and diethyl-substituted tetracyanoquinodimethanes (DMTCNQ and DETCNQ), and tetracyanonaphthoquinodimethane (TNAP) were prepared, which have molecular formulae of Cs+·DMTCNQ−·, Cs+·DETCNQ−·/(Cs+·DETCNQ−·)·1/2DETCNQ and (Cs+·TNAP−·)· 1/2TNAP, respectively. TheCs+·DETCNQ−·/(Cs+·DETCNQ−·)·1/2DETCNQand(Cs+·TNAP−·)·1/2TNAP salts exhibited considerably high room-temperature electrical conductivities (σrtʹs) of ca. 0.1 S·cm−1 on the compressed pellets. The room-temperature ferromagnetic behavior was observed for the three Cs+ salts, of which large saturation magnetization (7.3 emu·mol−1) was obtained for the (Cs+·TNAP−·)·1/2TNAP salt.