A　new　coordination　polymer,　Zn(bpy)L　(BUC-21),　(H2L　=　cis-1,3-dibenzyl-2-imidazolidone-4,5dicarboxylic　acid,　bpy　=　4,4＇-bipyridine),　has　been　synthesized　under　hydrothermal　conditions,　and　characterized　by　single-crystal　X-ray　analysis,　Fourier　transform　infrared　spectroscopy,　thermogravimetric　analyses,　CNH　elemental　analysis　and　UV-Vis　diffuse　reflectance　spectroscopy.　BUC-21　exhibited　an　excellent　performance　for　photocatalytic　Cr(VI)　reduction　with　a　conversion　efficiency　of　96%,　better　than　that　of　commercial　P25　(39%),　under　UV　light　irradiation　for　30　min.　BUC-21　could　also　be　used　to　conduct　photocatalytic　degradation　of　organic　dyes　including　methylene　blue,　rhodamine　B,　methyl　orange　and　reactive　red　X-3B.　Also,　the　photocatalytic　activity　of　BUC-21　remained　high　across　a　wide　pH　range　from　2.0　to　12.0.　It　is　interesting　to　note,　however,　that　BUC-21　was　unable　to　achieve　simultaneous　reduction　of　Cr(VI)　and　degradation　of　an　organic　pollutant　in　a　mixed　matrix,　which　can　be　attributed　to　the　competition　between　Cr(VI)　and　the　organic　dyes　for　access　to　the　photo-excited　electrons.　(C)　2017,　Dalian　Institute　of　Chemical　Physics,　Chinese　Academy　of　Sciences.　Published　by　Elsevier　B.V.　All　rights　reserved.