The　detection　of　explosives　is　crucial　for　homeland　security,　environmental　cleaning,　and　military　issues.　As　a　new　class　of　porous　materials,　metal-organic　frameworks　(MOFs)　are　promising　platforms　for　the　detection　of　organic　explosives.　In　this　work,　a　new　pillar-layered　Cd(II)　MOF,　[CdL(0.5)dpe(0.5)]center　dot　2H(2)O　(BUT-202,　H4L=4,8-disulfonaphthalene-2,6-dicarboxylic　acid,　dpe　=　1,2-bis(4-pyridyl)ethylene),　was　synthesized　and　characterized　by　single-crystal　X-ray　diffraction,　powder　X-ray　diffraction,　thermogravimetric　analysis,　infrared　spectroscopy,　and　elemental　analysis.　BUT-202　has　good　fluorescent　properties,　which　can　be　selectively　quenched　by　trace　amounts　of　2,4,6-trinitrophenol　(TNP)　in　DMF　with　low　detection　limit　of　0.2　mu　M.