Chemical pressure-induced Pt III -I Mott-Hubbard nanowire, [Pt(en) 2 I](Asp-C n ) 2 ·H 2 O (13 ≤ n ), detected via polarized infrared spectroscopy.

The electronic states of iodo-bridged platinum nanowire complexes have been studied using polarized FT-IR spectroscopy. The N-H symmetrical stretching mode was found to be highly sensitive to the electronic states, distinguishing mixed-valence (MV) and averaged-valence (AV) states. The first Pt(III) nanowire complexes have been realized by the chemical pressures of the counter-anions.