Abstract
Electrochemical behavior of tetrakis(dithioacetato)diplatinum(II), Pt 2(CH 3CS 2) 4, which is known to form a one-dimensional conducting complex by chemical oxidation with I 2, was studied in dichloromethane. In the oxidation of Pt 2(CH 3CS 2) 4, dark-green-colored thin dendrite crystals were found to grow on the Pt electrode surface. Although the branches of the dendrites were very thin, the expansion of the solid was large and rapid compared with usual electrochemical events. Concerning the formation of this solid, it was confirmed electrochemically that one-electron oxidation was significant. In addition, by collecting the formed crystals, and measuring the electrical conductivity at variable temperature, the activation energy of the formed solid was determined to be 0.0024–0.0028 eV, which was half of that of [Pt 2(CH 3CS 2) 4I] n . The elemental analysis revealed that the composition of the formed solid is Pt 2(CH 3CS 2) 4ClO 4. Judging from the high conductivity, however, we can conclude that the linear chain composed of Pt 2.5+ is formed by the direct stacking of Pt 2(CH 3CS 2) 4 without bridge of ClO 4 −.
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