Three　new　metal-organic　frameworks,　[Zn(atz)(nic)]n(1),　[Zn(atz)(isonic)]n·nHisonic(2)　and　[Cd(atz)(isonic)]n(3)　(Hnic=nicotinic　acid,　Hisonic=isonicotinic　acid),　have　been　firstly　synthesized　by　employing　mixed-ligand　of　pyridinecarboxylate　with　the　in　situ　generated　ligand　of　5-amino-tetrazolate(atz-),　and　characterized　by　elemental　analysis,　IR　spectroscopy,　TGA　and　single　crystal　X-ray　diffraction.　The　results　revealed　that　1　presents　a　two-dimensional　(2D)　＂sql＂　topological　network　constructed　from　the　linear　chain　subunit　of　Zn(nic)2　and　atz-　ligand.　A　remarkable　feature　of　2　is　a　2-fold　interpenetrated　diamondoid　network　with　free　Hisonic　molecules　locating　in　the　channels　formed　by　the　zigzag　chain　subunits　of　Zn(isonic)2.　Complex　3　is　a　3D　non-interpenetrated　pillared　framework　constructed　from　the　double　chain　subunits　of　Cd-COO--Cd.　It　possesses　a　rarely　observed　(4,6)-connected　＂fsc＂　topology.　The　thermal　stabilities　and　fluorescent　properties　of　the　complexes　were　investigated.　All　of　these　complexes　exhibited　intense　fluorescent　emissions　in　the　solid　state　at　room　temperature.　©　2009　Elsevier　Inc.　All　rights　reserved.