In　this　work,　the　synthesis,　characterization,　and　phosphorescent　properties　of　the　coordination　polymer,　{Ag-3(dppy)(2)[mu-SCN](3)}(n)　(1),　are　described.　X-ray　crystallography　showed　that　the　complex　forms　a　one-dimensional　infinite　zipper-like　chained　structure　linked　by　thiocyanate　as　the　bridging　ligand.　The　silver(I)　complex　exhibits　a　strong　sky-blue　phosphorescence　with　a　high　quantum　yield　of　70.2%　in　the　solid　state　at　ambient　temperature.　Additionally,　following　a　temperature　change　from　418　to　77　K,　the　complex　displays　a　remarkable　luminescent　thermochromic　property.