Three new luminescent Cd(ii)-MOFs by regulating the tetracarboxylate and auxiliary co-ligands, displaying high sensitivity for Fe3+ in aqueous solution

• DOI: 10.1039/c5dt00492f
• Publication Date: 2015-04-20T16:05:56Z
• Authors: Yunlong Wu; Guo-Ping Yang; Xiang Zhou; Jiang Li; Yan Ning; Yao-Yu Wang
• Keywords: SBus; Powder Diffraction; Thermogravimetric analysis; Binodal

Three new Cd(ii)-MOFs, [Cd(L1)0.5(bpp)] (), [Cd(L1)0.5(bipy)] and [Cd(L2)0.5(bipy)] () [H4Ln = (1,1':4',1''-terphenyl)-2',x,x'',5'-tetracarboxylic acid (n 1, x 3, n 2, 4), bpp 1,3-di(4-pyridyl)propane, bipy 2,2'-bipyridine], have been synthesized using Cd(ii) ions isomeric H4Ln ligands in the presence of auxiliary via solvothermal reaction, fully characterized by elemental analysis, FT-IR spectroscopy, powder X-ray diffraction (PXRD), thermogravimetric analysis (TGA). Complex is a three-dimensional (3D) pillar-layered network built from L1(4-) bridging co-ligands with binodal (4,8)-connected gsp2 topology symbol (4(4)·6(2))(4(16)·6(12)). was successfully instead ligand used to assemble giving 2D 4-connected sql net. 3D reticular framework [Cd2(COO)4] SBUs based on L2(4-) ligands, displaying (4,4)-connected lvt (4(2)·8(4)) topology. revealed that structures MOFs can be mediated steric effect tetracarboxylate secondary co-ligands. The solid-state luminescence properties were measured carefully ultraviolet irradiation at room temperature. In particular, exhibited high sensitivity for Fe(3+) aqueous solutions mixed metal ions, which makes it promising crystalline material luminescent probe Fe(3+). Importantly, keep its original reused sensing experiments. mechanism has also studied detail.