Synthesis,Structure and Fluorescence Property of New Cd-MOFs Based on a Tetraphenylethylene(TPE)Ligand

A very stable Cd^Ⅱ-organic framework,{[Cd₃(Tipe)_1.5(bpodc)₂Cl₂]·(H₂O)₂}_n(compound 1,Tipe=1,1,2,2-tetrakis(4-(imidazol-1-yl)phenyl)ethene,bpodc=benzophenone-4,4-dicarboxylic acid),has been successfully synthesized under hydrothermal conditions.Compound 1 crystallizes in the triclinic system,space group P1^-,with a=12.289(3),b=15.951(4),c=20.755(5)?,α=81.248(2)°,β=83.905(2)°,γ=89.452(2)°,V=3998.2(17)?³,Z=2,M_r=1839.59,D_c=1.528 g/cm³,μ=0.925 mm^-1,F(000)=1844,R=0.0508 and wR=0.1571 for 13998 observed reflections(I>2σ(I)).Its overall structure is a three-dimensional stacking with a porosity of 10.1%based on a calculation by PLATON.Compound 1 shows a blue fluorescence emission with the peak maximum of 501 nm(λ_ex=397 nm)by ligand-to-ligand charge transfer of TPE chromophore.And it exhibits excellent performance in detecting Fe³⁺and Cr₂O₇^2-ions in aqueous solutions as a multi-response sensor.     

Synthesis,Structure and Fluorescence Property of a New Mn-MOFs Based on a Tetraphenylethane (TPE) Ligand

A new 3D luminescent Mn-MOF is synthesized based on a tetraphenylethane-core ligand 1,1,2,2-tetrakis(4-(1H-imidazol-1-yl)phenyl)ethene(tipe),with the formula[Mn(tipe)(bcpf)·(DMF)]_n(1,bcpf=4,4?-sulfonyldibenzoic acid).Compound 1 crystallizes in the triclinic system,space group ■,with a=12.951(2),b=14.235(2),c=14.375(2)?,α=90.015(2)°,β=108.181(2)°,γ=99.368(2)°,V=2480.6(6)?~3,Z=2,M_r=1028.98,D_c=1.378 g/cm~3,μ=0.372 mm~(-1),F(000)=1066,R=0.0479 and wR=0.1066 for 5927 observed reflections(Ⅰ2σ(Ⅰ)).Its topological analysis displays that 1 is a double interpenetrating architecture.The Mn atom bridges the tipe ligands to form the 1-dimensional chains into a 2-dimensional layered structure,and then connects the auxiliary ligands to get a 3-dimensional structure.What’s more,luminescent spectra of 1 show that it emits strong blue light caused by ligand-to-ligand charge transfer of TPE chromophore.