Two　novel　Cd(II)-citrate　complexes　were　obtained　with　different　metal/ligand　ratios　through　hydrothermal　method.　Their　structures　were　determined　by　single-crystal　X-ray　diffraction　analysis.　Although　their　topological　structures　are　both　2-D　layer　network　assemblies,　both　central　Cd(II)　ions　and　Hcit(3-)　ligands　display　completely　different　coordination　modes.　In　polymeric　complex　1,　Hcit(3-)　serves　as　a　mu(10)-bridged　and　central　Cd(II)　ions　adopt　6-　and　8-coordinated　configurations.　In　contrast,　a　mu(9)-bridged　and　6-　and　7-coordinated　environments　between　Cd(H)　and　Hcit(3-)　are　established　in　the　polymeric　complex　2.　Two　Complexes　remain　stable　up　to　approximately　300　degrees　C.　The　complex　1　exhibits　strong　fluorescent　emission　band　at　450　nm　(lambda　=　346　nm)　as　well　as　complex　2　exhibits　strong　fluorescent　emission　band　at　430　(lambda　=　346　nm).　(c)　2005　Elsevier　B.V.　All　rights　reserved.