Synthesis and Characterization of Octamethylenethiafulvalene Compounds with Osmium, Iridium, Platinium and Gold Chloride

摘要

The charge-transfer compound (OMTTF)AuCl4 was prepared from the direct reaction of octamethylenethiafulvalene (OMTTF) with HAuCl4?¤xH2O in THF. (OMTTF)2PtCl4, (OMTTF)2IrCl6?¤2H2O, and (OMTTF)OsCl5?¤THF were also formed using H2PtCl6?¤xH2O, H2IrCl6?¤xH2O and H2OsCl6, respectively. The prepared compounds were characterized by magnetic (EPR, magnetic susceptibility), spectroscopic (IR, UV-Vis), electrochemical (CV) methods, and the powdered electrical conductivity measurement. The powdered electrical conductivities at room temperature were ~10-7S?¤cm-1 . The experimental results show that OMTTF?¤+ monocation radicals exist in all of the prepared compounds. The redox potential of OMTTF supports that OMTTF?¤+ is relatively stable. The magnetic properties indicate that there are significant magnetic interactions between the localized odd electrons on the central metal (Ir and Os) ions and the odd electrons resided on OMTTF?¤+ cation radicals in both (OMTTF)2IrCl6?¤2H2O and (OMTTF)OsCl5?¤THF.