Squarato-metal(II) complexes: Part 6. Synthesis, structure and magnetic characterization of an usual squarate-based 1D copper(II) coordination polymer composed of hexanuclear entities and a trinucleating ligand scaffold

Polynuclear and polymeric squarato-bridged coordination compounds

“…64,65 In addition to these polymeric species, hexanuclear CuIJII) entities in the 1D catena-[Cu 6 IJL 10 ) 2 IJμ 1,3 -C 4 O 4 ) 3 ]IJClO 4 ) 6 •12H 2 O (69), where L 10 is 1,3,5-trisijbisIJ2-pyridylmethyl)-aminomethyl]benzene (Scheme 3), were also reported. 66 Mixing the squarate with some N,N′-donor spacer ligands such as 4,4′-bpy, dpe, dpp and pyz (see ligand abbreviations), which have the tendency to form bridging species, led to the generation of a new series of mixed-ligand bridging frameworks (MOFs). These molecules produce a wide variety of structural topologies.…”

“…Incorporating a second bridging organic ligand such as 4,4′-bpy, pyz, L 10 and L 14 into the skeleton of the bridged-squarato species will allow the 1D and/or 2D chains to be mutually linked via these ligands and hence construct a three-dimensional (3D) metal-organic frame work (MOF), which can also be achieved through H-bonding and intermolecular π-π interactions when the bridging organic ligands have aromatic characters. [10][11][12]66,83,84,87,96 Thus, the squarato MOF compounds not only display interesting structural topologies and unique architecure [10][11][12]63,64,66,69,83,[87][88][89]96,116,117 but also the compounds may lead to some possible potential applications in the fields of electrical conductivity, non-linear optics, gas storage and molecular recognition. [5][6][7][8] Some examples of MOF structures are illustrated in Fig.…”

“…64,65 In addition to these polymeric species, hexanuclear Cu( ii ) entities in the 1D catena -[Cu 6 (L 10 ) 2 (μ 1,3 -C 4 O 4 ) 3 ](ClO 4 ) 6 ·12H 2 O ( 69 ), where L 10 is 1,3,5-tris[bis(2-pyridylmethyl)-aminomethyl]benzene (Scheme 3), were also reported. 66…”