A three-dimensional NbO-type MOF with the formula Cu2(EBTC)(H2O)2·[G] (1) (EBTC(4-) = 1,1'-ethynebenzene-3,3',5,5'-tetracarboxylate; G = guest molecules and represent DMF, DMSO and H2O) was synthesized using a solvothermal method. The sufficient cavity space in 1 can be used to encapsulate the heterocyclic compounds benzopyrrole (C8H7N), benzofuran (C8H6O) and benzothiophene (C8H6S). The guest-...