A　2D　Pr-Cd　heterometal-organic　compound,　[Pr2Cd3　(EDTA)(3)　(H2O)(11)]center　dot(H2O)(14)　(1)　(H(4)EDTA　=　ethylene　diamine　tetraacetic　acid)　has　been　successfully　prepared　by　the　H(4)EDTA　ligand,　Pr6O11　and　CdCl2　center　dot　2.　5H(2)O.　The　structure　of　1　was　determined　by　X-ray　single-crystal　diffraction.　Compound　1　crystallizes　in　the　monoclinic　space　group　C2,　alpha　=　16.　154(3)　angstrom,　b　=　14.　863(3)angstrom,　c　=　14.　875(3)angstrom,　beta　=　115.　855　(3)degrees,　V　=　3　214.　2(9)　angstrom(3),　Z　=　2.　There　are　nanosized　heart-like　Pr6Cd6O12　wheel-clusters　in　the　structure.　The　coordination　geometries　for　the　two　seven-coordinated　Cd2+　ions　are　both　close　to　that　of　a　monocapped　trigonal　prism.　The　Pr3+　ion　is　ten-coordinate　and　described　as　seriously　distorted　dicapped　square　antiprism.　The　completely　deprotonated　EDTA(4-)　ligand　link　one　Cd2+　and　two　Pr3+　ions.　Four　carboxylate　O　and　two　N　atoms　of　the　EDTA(4-)　ligand　are　all　coordinated　to　the　Cd2+　cation　and　the　remaining　carboxylate　groups　connect　one　Pr3+　ion,　respectively.　The　Pr3+　and　Cd2+　cations　are　bridged　by　(2)-O　alternatively　to　form　a　Pr6Cd6O12　wheel-clusters.　Each　Pr6Cd6O12　is　linked　to　six　surrounding　wheels　by　sharing　Pr3+,　forming　a　highly　ordered　layered　network.　The　2D　layers　are　further　packed　in　center　dot　center　dot　center　dot　AAA　center　dot　center　dot　center　dot　stacking　mode　and　the　free　water　molecules　are　suspended　between　the　layers.　There　are　strong　O-H　center　dot　center　dot　center　dot　O　hydrogen-bond　interactions　between　water　molecules　and　carboxylate　groups,　and　the　O　center　dot　center　dot　center　dot　O　distance　ranges　from　2.　666　to　3.　050　angstrom.　The　hydrogen-bond　interactions　play　an　important　role　in　stabling　the　structure.　At　the　same　time,　PXRD,　TG/DSC,　IR　and　2D　IR　correlation　spectroscopy,　solid　Luminescent　spectrum　and　UV-Visible　absorption　spectrum　are　studied.　Because　there　are　strong　O-H　center　dot　center　dot　center　dot　O　hydrogen　bonds,　the　IR　spectrum　of　compound　1　shows　broad　bands　around　3　680　similar　to　2　640　cm(-1).　The　four　carboxylic　acid　groups　of　ED-TA(4-)　ligand　are　completely　deprotonated,　The　C=O　stretching　vibrations　peak　of　carboxylate　groups　of　compound　1　shift　lower　wavenumber　compared　to　H-4　EDTA　ligand.　Compound　1　shows　emission　peak　at　360　nm　that　can　be　assigned　to　LMCT　transition　of　between　Cd2+　and　EDTA(4-)　when　it　is　excited　at　325　mm　Compound　1　is　a　potential　luminescent　material.　2D　IR　correlation　spectrum　of　1　indicates　that　the　stretching　vibrations　of　O-H　are　sensitive　with　the　thermal　perturbation　because　of　strong　hydrogen-bond　interactions　between　water　molecules　and　carboxylate　groups.　The　UV-Visible　absorption　spectrum　of　compound　1　shows　the　absorption　bands　of　n　-＞　sigma*　and　pi　-＞　pi*　transitions　of　EDTA(4-)　ligand　and　f　-＞　f　transition　of　Pr3+.