Thermally induced electron-hole dissociation dynamics in quasi-one-dimensional bromo-bridged palladium(III) Mott-insulator [Pd(en) 2 Br](Suc-C n ) 2 ·H 2 O (C n -Y = dialkylsulfosuccinate; n = 5 and 6).

Current-voltage characteristics and dielectric properties were studied in bromo-bridged one-dimensional compounds, [Pd(en) 2 Br](Suc-C 5 ) 2 ·H 2 O, exhibiting mixed-valence and averaged valence (MV-AV) phase transition. In the AV phase, clear nonlinear current-voltage characteristics were observed. This phenomenon was explained by the thermally induced electron-hole separation assisted by an electric field. This mechanism was supported by the dielectric properties of [Pd(en) 2 Br](Suc-C n ) 2 ·H 2 O ( n = 5 and 6).