A　novel　3-D　compound　of　(enH(2))(1.5)[Bi-3(C2O4)(6)(CO2CONHCH2CHNH3)]center　dot　6.5H(2)O　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　C-2/c　with　a　=　3　1.110(8)angstrom,　b　=　1.544(3)　angstrom,　c　=　22.583(6)　angstrom,　beta　=　112.419(3)degrees,　V　=　7497(3)　angstrom(3),　Z　=　8,　R-1　=　0.0463　and　wR(2)　=　0.　1393　for　unique　7686　reflections　I　＞　2a(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　antiprisin,　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　nionamide　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　all　emission　peak　at　445　nm.　(c)　2005　Elsevier　Inc.　All　rights　reserved.