A　novel　3-D　compound　of　(enH2)1.5[Bi　3(C2O4)6(CO2CONHCH　2CH2NH3)]·6.5H2O　has　been　hydrothermally　synthesized　and　characterized　by　IR,　ultraviolet-visible　diffuse　reflection　integral　spectrum　(UV-Vis　DRIS),　fluorescence　spectra,　TGA　and　single　crystal　X-ray　diffraction.　It　crystallizes　in　the　monoclinic　system,　space　group　C2/c　with　a=31.110(8)Å,　b=11.544(3)Å,　c=22.583(6)Å,　β=112.419(3)°,　V=7497(3)Å3,　Z=8,　R1=0.0463　and　wR2=0.1393　for　unique　7686　reflections　I>2σ(I).　In　the　title　compound,　the　Bi　atoms　have　eight-fold　and　nine-fold　coordination　with　respect　to　the　oxygen　atoms,　with　the　Bi　atoms　in　distorted　dodecahedron　and　monocapped　square　antiprism,　respectively.　The　3-D　framework　of　the　title　compound　contains　channels　and　is　composed　of　linkages　between　Bi　atoms　and　oxalate　units,　forming　honeycomb-like　layers　with　two　kinds　of　6+6　membered　aperture,　and　pillared　by　oxalate　ligands　and　monamide　groups.　The　channels　have　N-ethylamine　oxalate　monamide　group　-CO2CONHCH2CH2NH3　+,　which　is　formed　by　the　in　situ　reaction　of　en　and　oxalate　acid.　At　room　temperature,　the　complex　exhibits　intense　blue　luminescence　with　an　emission　peak　at　445　nm.　©　2005　Elsevier　Inc.　All　rights　reserved.