A　flexible　ligand　with　two　1,3-benzenedicarboxylate　units　has　been　used　to　construct　a　microporous　metal-organic　framework　with　pcu　topology　based　on　supramolecular　building　blocks　(SBBs).　The　obtained　Cu(II)　MOF　exhibits　a　noticeable　CO2　adsorption　hysteresis　and　a　comparable　methane　adsorption　capacity　at　room　temperature.