Author/Authors :
Kushch، نويسنده , , N.D. and Kazakova، نويسنده , , A.V. and Buravov، نويسنده , , L.I. and Yagubskii، نويسنده , , E.B. and Simonov، نويسنده , , S.V. and Zorina، نويسنده , , L.V. and Khasanov، نويسنده , , S.S. and Shibaeva، نويسنده , , R.P. and Canadell، نويسنده , , Sergey E. and Son، نويسنده , , H. and Yamada، نويسنده , , J.، نويسنده ,
Abstract :
Two new radical cation salts of the non-TTF containing donor BDH-TTP with the thiocyanatomercurate anions were synthesized. The κ-(BDH-TTP)4[Hg(SCN)4]·C6H5NO2 (1) and α′-(BDH-TTP)6[Hg(SCN)3][Hg(SCN)4] (2) salts were characterized by single crystal X-ray diffraction, electrical resistance measurements and electronic band structure calculations. Both salts have a layered structure in which the BDH-TTP layers of κ- or α′-type alternate with anionic sheets. The anionic layers of 1 contain the counterion [Hg(SCN)4]2− and the nitrobenzene molecule which are statistically disordered. Salt 2 contains two different layers (although both of the α′-type) of the organic donors, a somewhat unusual fact in organic conductors. The anion layers of 2 consist of polymeric chains built up from a combination of the two different anions, [Hg(SCN)3]1− and [Hg(SCN)4]2−. Salt 1 shows a metallic behavior down to helium temperatures whereas salt 2 exhibits two-phase transitions in the temperature range 295–8 K.
Keywords :
structure , Conductivity , BDH-TTP radical cation salts , Electrocrystallization
