A new ladder-type silver(I) coordination polymer with 4,4'-bipyridine and 4-[(4-carboxybenzyloxy)methyl]benzoate ligands: synthesis, crystal structure, fluorescence properties and Hirshfeld surface analysis

Structure, magnetic properties and spin density of two alternative Mn(II) coordination polymers based on 1,4-bis(2'-carboxyphenoxy)benzene

Two novel manganese coordination polymers [Mn2(µ2-bcpb)(µ4-bcpb)(2,2’-bipy)2]n (1) and [Mn2(µ3-bcpb)2(2,2’-bipy)2(H2O)]n (2) (H2bcpb=1,4-bis(2’-carboxylato phenoxy)-benzene; 2,2’-bipy=2,2’-bipyridine), have been synthesized successfully from the same reactants but for different filling degrees of Teflon tubes used...

A new three-dimensional twofold interpenetrated cadmium(II) metal-organic framework: synthesis, structure and photoluminescence properties

The design and synthesis of metal-organic frameworks (MOFs) have attracted much interest due to the aesthetics of their crystalline architectures and their potential applications as new functional materials. A new twofold interpenetrated three-dimensional (3D) MOF, namely, poly[[triaqua(μ₄-(2R,2'R)-2,2'-{[1,4-phenylenebis(carbonyl)]bis(azanediyl)}dipropionato-κ⁷O¹:O¹,O^1':O⁴:O⁴,O^4',O^4'')(μ₃-(2R,2'R)-2,2'-{[1,4-phenylenebis(carbonyl)]bis(azanediyl)}dipropionato-κ³O¹:O⁴:O⁴)dicadmium(II)] dihydrate], {[Cd₂(C₁₄H₁₄N₂O₆)₂(H₂O)₃]·2H₂O}_n, (I), has been synthesized by the reaction of Cd(CH₃COO)₂·2H₂O with the synthesized ligand (2R,2'R)-2,2'-{[1,4-phenylenebis(carbonyl)]bis(azanediyl)}dipropionic acid (H₂L). Single-crystal X-ray diffraction analysis reveals that the carboxylate groups from two crystallographically independent L^2- dianions link the cadmium cations into a one-dimensional helical secondary building unit (SBU). The resulting SBUs are extended into a 3D metal-organic framework via the terephthalamide moiety of the ligand as a spacer. In the crystal, two independent MOFs interpenetrate each other, thus producing a twofold interpenetrated 3D architecture, which shows an unprecedented 2-nodal (7,9)-connected net with the point (Schläfli) symbol (3⁷·4⁶·5⁸)(3⁸·4¹¹·5¹⁶·6). MOF (I) was further characterized by elemental analysis, IR spectroscopy, powder X-ray diffraction and thermogravimetric analysis. The photoluminescence properties and UV-Vis absorption spectrum of (I) have also been investigated. The MOF exhibits enhanced fluorescence emission with a high photoluminescence quantum yield of 31.55% and a longer lifetime compared with free H₂L.