Quantitative postsynthetic bromination of the fumarate linkers in 1 and 2 yields, in each case, an identical product which exhibits structural rigidity resulting from the installation of sterically bulky bromine substituents across the linkers. As well as serving as an unusual example of two different an efficient, irreversible adsorbent for Br2, as the dry MOF can theoretically chemisorb 0.88 g g -1 Br2