Construction of new 1D and 2D coordination polymers generated from rigid N,N′-bis(4-pyridylmethylene)-1,5-naphthalenediamine ligand:Syntheses, crystal structures and luminescence properties

Treatment of N,N′-bis(4-pyridylmethylene)-1,5-naphthalenediamine (L) with Pb(OAc)2/KBr, Cu(acac)2, and Cu(OAc)2 afforded three new coordination polymers [Pb(μ-L)(μ-Br)2]n (1), [Cu(μ-L)(acac)2]n (2), and [Cu2(μ-L)(μ-OAc)4]n (3). These coordination polymers have been structurally characterized by single crystal X-ray diffraction. Compound 1 has a 2D sheet structure in which the lead(II) centers are bridged by both L and bromide ligands. Compound 2 adopts a 1D neutral coordination chain and consists of bis(2,4-pentanedionato) copper(II) units connected by rigid bridging L ligands. The structure of compound 3 also adopts a 1D neutral coordination chain in which two copper centers are connected through four acetate groups to form a Cu(OAc)4Cu paddle-wheel-type cage between two bridging L ligands. The FT-IR spectra, thermal behavior and photoluminescence properties of these coordination polymers have also been investigated.</p

Cd(II) coordination polymers based on expanded N,N′-heteroaromatic donor ligands

The isomeric N donor linkers bis(pyridin-4-ylmethylene)naphthalene-1,5-diamine (L1) and bis(pyridin-3-ylmethylene)naphthalene-1,5-diamine (L2) have been used with acetate and iodide as co-ligands to generate four new cadmium(II) coordination polymers. [CdL1(OAc)2]n (1), [CdL1(I)2]n (2), [CdL2(OAc)2]n (3) and [CdL2(I)2]n (4) were characterized by elemental analysis, X-ray powder diffraction, IR spectroscopy, thermal analysis and single crystal X-ray diffraction. In line with the concept of crystal engineering, their structures share common motifs: the heteroaromatic linkers generate chains, subtending Cd⋯Cd distances consistent with their N donor arrangement. The co-ligands control the coordination number of the Cd(II) cations and interchain connectivity: The acetate moieties either adopt bridging and chelating or exclusively bridging modes and crosslink essentially linear chains based on octahedral metal centers; in the former case, the ladder-like one-dimensional ribbon 1 is generated, whereas the latter connectivity results in the two-dimensional layer structure 3. In contrast, iodide acts as terminal ligand towards tetrahedral Cd(II), and hence 2 and 4 are single-stranded 1D zig-zag polymers. In comparison to the uncoordinated heteroaromatic L1 and L2, the Cd coordination polymers show slightly red-shifted luminescence spectra of significantly higher intensity due to the more rigid arrangement of the π systems

Cd(II) and Cu(II) coordination polymers constructed from the expanded 1,4-bis(4-pyridyl)-2,3-diaza-1,3-butadiene ligand: conventional and ultrasound-assisted synthesis, crystal structure, luminescence and magnetic properties

A 3D open inorganic/organic framework, {[Cd(mu-L)(mu(3)-SO4)(H2O)]center dot H2O}(n) (1) [L = 1,4-bis(4-pyridyl)-2,3-diaza-1,3-butadiene] was synthesized by the reaction of CdSO4 center dot 8H(2)O with L. The treatment of Cu(NO3)(2)center dot 3H(2)O with the same N,N'-donor ligand in two different solvent mixtures, methanol/ dichloromethane (2) and methanol/ chloroform (3), afforded two new ladder-like coordination polymers of formula {[Cu(mu-L)(mu-NO3)(NO3)]center dot solv}(n) [solv = CH2Cl2 (2) and CHCl3 (3)]. The non-interpenetrated ladder motifs 2 and 3 enclathrate the uncoordinated solvent molecules. Crystalline coordination polymers 1 and 3 were also successfully prepared by a sonochemical method under different reaction conditions. Our results indicate that the size of the particles is dependent on the irradiation time. 1 and 3 exhibit intense luminescent emissions in the solid state at room temperature. Cryomagnetic measurements of 3 show the occurrence of a ferromagnetic interaction between the copper(II) ions through the double oxo-nitrate bridge together with a very weak inter-ladder antiferromagnetic interaction [J = +4.93(2) cm(-1), g = 2.10(1) and Theta = -0.567(5) K]

CCDC 1825303: Experimental Crystal Structure Determination

Related Article: Mansoureh Zahedi|2018|CSD Communication|||,Related Article: Mansoureh Zahedi, Behrouz Shaabani, Negar Radyousefnia, Ulli Englert, Graeme R. Blake, Muhittin Aygün|2018|J.Coord.Chem.|71|4031|doi:10.1080/00958972.2018.1539713,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.

CCDC 1481155: Experimental Crystal Structure Determination

Related Article: Behrouz Shaabani, Negar Rad-Yousefnia, Mansoureh Zahedi, Şahin Ertan, Graeme R. Blake, Mohammad Sadegh Zakerhamidi|2017|Inorg.Chim.Acta|455|158|doi:10.1016/j.ica.2016.10.021,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.

CCDC 1481783: Experimental Crystal Structure Determination

Related Article: Behrouz Shaabani, Negar Rad-Yousefnia, Mansoureh Zahedi, Şahin Ertan, Graeme R. Blake, Mohammad Sadegh Zakerhamidi|2017|Inorg.Chim.Acta|455|158|doi:10.1016/j.ica.2016.10.021,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.

CCDC 1481350: Experimental Crystal Structure Determination

Related Article: Behrouz Shaabani, Negar Rad-Yousefnia, Mansoureh Zahedi, Şahin Ertan, Graeme R. Blake, Mohammad Sadegh Zakerhamidi|2017|Inorg.Chim.Acta|455|158|doi:10.1016/j.ica.2016.10.021,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.

CCDC 1527445: Experimental Crystal Structure Determination

Related Article: Mansoureh Zahedi, Behrouz Shaabani, Ulli Englert, negar radyousefnia, Graeme R. Blake and Canan Kazak|2017|CSD Communication|||,Related Article: Mansoureh Zahedi, Behrouz Shaabani, Ulli Englert, Negar Rad-yousefnia, Graeme R. Blake, Canan Kazak|2017|Polyhedron|133|110|doi:10.1016/j.poly.2017.05.023,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.

CCDC 1527444: Experimental Crystal Structure Determination

Related Article: Mansoureh Zahedi, Behrouz Shaabani, Ulli Englert, negar radyousefnia, Graeme R. Blake and Canan Kazak|2017|CSD Communication|||,Related Article: Mansoureh Zahedi, Behrouz Shaabani, Ulli Englert, Negar Rad-yousefnia, Graeme R. Blake, Canan Kazak|2017|Polyhedron|133|110|doi:10.1016/j.poly.2017.05.023,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.