Chemical name:<i>catena</i>-Poly[[[(2,2'-bipyridine-\k^2^<i>N</i>,<i>N</i>')(dimethylsulfoxide-\k<i>O</i>)(nitrato-\k^2^<i>O</i>,<i>O</i>')bismuth(III)]-\m-5-carboxybenzene-1,3-dicarboxylato-\k^4^<i>O</i>^1^<i>,O</i>^1'^<i>:O</i>^3^<i>,O</i>^3'^] dimethyl sulfoxide monosolvate]