An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
To systematically investigate the factors that influence the formation of various metal(II) complexes, dual systems containing a flexible benzene dicarboxylate and two kinds of dipyridyl-type coligands are assembled into six metal(II) complexes, formulated as {[Zn(phda)(bpa)]·(H2O)3}n (1), {[Zn2(phda)2(dpe)2]·(H2O)}n (2), [Co(phda)(bpa)(H2O]n (3), [Co(phda)(dpe)]n (4), [Mn(phda)(bpa)(H2O)]n (5), and [Mn(phda)(dpe)0.5(H2O)]n (6) (phda = 1,2-phenylenediacetate, dpe = 1,2-di(4-pyridyl)ethylene, and bpa = 1,2-bi(4-pyridyl)ethane). The X-ray single crystal diffractions show that the formed six complexes reveal a diversified structure topology under the regulation of two kinds of dipyridyl-type coligands and are further divided into three complex pairs based on the nature of metal cations. Each pair of complexes is assembled from the same metal cation and different dipyridyl-type coligands to produce disparate structures respectively: the three-dimensional (3D) metal–organic frameworks of zinc complex pairs (1, 2) feature a single dia net with permanent porosity when the free solvent molecules are evacuated and a 4-fold interpenetrated dia net with dense structure, respectively; cobalt complexes pairs (3, 4) exhibit a two-dimensional (4,4) grid and a 3D self-penetrated framework with (48668) rob net, respectively. Both manganese complex pairs (5, 6) display (4,4) grids except that the former contains linear metal carboxylates and the latter consists of ribbonlike metal carboxylates. In addition, thermal stability of complex 1, luminescent properties of the zinc complex pairs (1, 2), and magnetic properties of complexes 4 and 6 are also systematically investigated.
This work presents a well-defined synthetic system exemplifying the effect of N-donor ancillary ligands on the formation of complex architectures in a zinc(II)-H2hmph-H2O system by the mild hydrothermal route (H2hmph = homophthalic acid). The single-crystal X-ray diffractions reveal that structure variation of isolated three complexes spans the range of dimensionalities from 2D lamella [Zn(hmph)(bpe)]n (1), 2D thick-layer [Zn(hmph)(bpp)]n (2) to 3D microporous framework {[Zn2(hmph)(trz)2]·H2O}n (3), showing the marked sensitivity of the structures to the flexibility of varied N-donor ancillary ligands (bpe = 1,2-di(4-pyridyl)ethylene, bpp = 1,3-di(4-pyridyl)propane, and Htrz = 1,2,4-triazole). The structures of three complexes can be considered as the assembly of various chain-like structure motifs. The 2D lamella structure of 1 features hmph-bridged binuclear zinc(II) chains joined by less flexible trans-bpe ligands, whereas the 2D thick-layer of 2 manifests hmph-bridged mononuclear zinc(II) chains cross-linked further by flexible bpp legands along two different directions. The alternate opposite chiral helixes, featuring rigid trz-bridged mononuclear zinc(II), and additional binuclear zinc(II) units are cohered together by hmph linkers yielding a 3D microporous coordination network of 3 with new framework topology. It is shown that the structures, packing densities, and thermal stabilities of all these complexes are markedly sensitive to the molecule size, conformation, and flexibility of varied N-donor ancillary ligands. Furthermore, fluorescence properties of complexes 1–3 are also investigated.
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
Self-assembly between simple unsymmetrical ligands, such as h2epda (5-ethyl-pyridine-2,3-dcarboxylic acid) and H2hmph(homophthalic acid) and two transition metals produce two new 2D lamella coordination polymers [Cu(hedpa)2]n1 and [Co(hmph)(bpe)]n2 (bpe = 1,2-di(4-pyridyl)ethylene), respectively. The 2D lamella structure of 2 features hmph-bridged binuclear cobalt(II) chains joined by less flexible trans-bpe ligands, whereas the 2D layer of 1 manifests that unsymmetrical ligand h2epda directly bridges mononuclear copper(II) running along the bc plane. The thermogravimetric (TG) reveal that both compounds are stable. Magnetic measurements show that complex 2 exhibits global metamagnetic behaviors.
'/%3e%3cuse xlink:href='%23a' transform='rotate(23.036 .093 25.536)'/%3e%3cuse xlink:href='%23a' transform='rotate(45.87 1.273 16.18)'/%3e%3cuse xlink:href='%23a' transform='rotate(69.945 .996 12.078)'/%3e%3cuse xlink:href='%23a' transform='rotate(20.66 -19.689 31.932)'/%3e%3c/svg%3e)