Two organic hybrid manganese selenoarsenates, [Mn(en)][MnAsSe] (; en = ethanediamine) and {[Mn(atep)][Mn(tepa)](AsSe)} [; atep = 4-(2-aminoethyl)triethylenetetramine], were made under mild solvothermal conditions. is a new type of one-dimensional low-valent selenoarsenate(II) constructed by the linkages of tetrahedral [MnSe] units and two manners of bridging of [AsSe] anions. comprises a neutral {[Mn(atep)][Mn(tepa)](AsSe)} molecule with a rare seven-coordinated manganese center, which represents the sole example of an organic hybrid selenoarsenate with the [Mn(tepa)] complex as the bridging group. Both and exhibit special photocurrent responses upon visible-light illumination and magnetic properties.
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