Metal–organic framework
Metal–organic frameworks (MOFs) are a class of coordination polymers consisting of metal clusters, also known as secondary building units (SBUs), coordinated to organic ligands to form one-, two-, or three-dimensional structures that are usually porous. The organic ligands included are sometimes referred to as "struts" or "linkers", one example being 1,4-benzenedicarboxylic acid (H2bdc).