The synthesis of self-doped conductive poly(3,4-ethylenedioxythiophene) (PEDOT) bearing phosphonic acid moieties is first reported. The UV-vis-NIR spectrum of the film clearly confirmed self-doping. The polymer exhibited good water solubility as a salt with NMe3, as demonstrated by filtration tests with a membrane filter (0.02 µm). This result is in contrast to a PEDOT/poly(4-styrene sulfonate) dispersion, which cannot pass through the filter. The conductivity of a drop-cast film reached 1.3 × 102 S cm−1. The thermogravimetric analysis and elementary analysis of the drop-cast film showed that the conductive polymer presents as a NMe3 salt, which might protect the materials from acid-induced corrosion. The developed conductive polymer has the potential for being applied in various organic electronic materials.

Osmium(II) and osmium(III) complexes with a potentially hexadentate ligand [N,N,N′,N′-tetrakis(2-pyridylmethyl)ethylenediamine, (TPEN)] are synthesized. The X-ray structural analysis of [Os II/III (TPEN)](PF 6 ) 2/3 complexes reveals that the chelating ligand exhibits a hexadentate coordination fashion and induces distortion from a regular octahedron to the osmium centers. Due to this distortion, the osmium(III) center becomes labile toward substitution by chloride and bromide anions. The osmium(III) complex, [Os III (TPEN)](PF 6 ) 3 , reacts with Cland Brto give the anion bound six coordinated osmium(III) complex {[Os III (Cl/Br)(κ 5 -TPEN)] 2+ }, in which one of the equatorial pyridine donor groups is dissociated from the osmium(III) center. Kinetic and spectroscopic studies on the reaction with Brat a low temperature suggest that the ligand substitution involves an [a]