Two structurally different metal–organic frameworks based on Sr²⁺ ions and 1,2,4,5-tetra­kis­(4-carb­oxy­phen­yl)benzene linkers have been synthesized solvothermally in different solvent systems, viz. poly[[μ₁₂-4,4′,4′′,4′′′-(benzene-1,2,4,5-tetra­yl)tetra­benzoato](di­methyl­formamide)­distrontium(II)], [Sr₂(C₃₄H₁₈O₈)(C₃H₇NO)₂]_n, and poly[tetra­aqua­[μ₂-4,5-bis­(4-carb­oxy­phen­yl)-4,4′-(benzene-1,2-di­yl)dibenzoato]tris­trontium(II)], [Sr₃(C₃₄H₂₀O₈)₂(H₂O)₄]. The differences are noted between the crystal structures and coordination modes of these two MOFs, which are responsible for their semiconductor properties, where structural control over the bandgap is desirable.