Uranium-bridged Dimeric Keggin-type Polyoxometalate and its Proton Conductive Properties

A novel dimeric structure based on trilacunary Keggin-type [SbW 9 O 33 ] 9− was synthesized, featuring two additional Sb 3+ cations. This compound exhibits significant proton conductivity, reaching up to 2.50 × 10 −2 S cm −1 at 85 °C and 85% RH.