Polymeric quasi-one-dimensional platinum compounds

Magnus' green salt, [Pt(NH3)(4)][PtCl4] is a quasi-one-dimensional inorganic semiconductor containing linear arrays of platinum atoms. its use in materials science is limited since it does not melt prior to decomposition and is largely insoluble in water and organic solvents which makes processing difficult. We have remedied this deficiency by substitution of coordinated ammonia or chloride by monodentate or bidentate ligands, including optically active aminoalkanes, resulting in soluble compounds. Depending on the ligands, the polymeric supramolecular structure in the solid state persisted in solution or decayed to ion pairs. in the solid state, the ligands markedly influenced the Pt-Pt distances, which on their part directed optical and electrical properties. Thus, high chiral anisotropy factors, cryochromic behavior, or (anisotropic) electric semiconductivity were found. A number of derivatives were processed to oriented films and fibers. Some complexes exhibited the color and electric characteristics of Magnus' green salt and thus can be regarded as soluble equivalents of Magnus' green salt. oriented films of such a compound were applied as active semiconducting layer in field-effect transistors (FET). The corresponding devices showed remarkable stability towards air and water which was superior to that of unprotected field-effect transistors based on typical organic polymers.