Two unprecedented 1D coordination polymer chains based on tetranuclear copper(II) building blocks

Heptacopper(II) and dicopper(II)-adenine complexes: synthesis, structural characterization, and magnetic properties

“…Copper complexes, particularly high-nuclearity, have been intensively studied as metalloenzyme models for catalysis of various oxidation reactions, for their quantum magnetic properties, and for the creation of interesting architectural topologies [10][11][12][13]. Dinuclear copper compounds are by far the most abundant [14][15][16][17][18], but polynuclear copper structures, in which the number of metal ions, (n), ranges from 3 to 8, are also common [19][20][21][22].…”

A cuboidal [Cu4(SO4)4] structure supported by β-picoline ligands

“…Harris notation is written as [XÁYYYY] where X is the number of metals that a ligand bridges, and the Ys are the number of metals connected to each donor atom in the ligand (Papatriantafyllopoulou et al, 2009). The [3.2110] bridging motif is rare in sulfates and has only been observed in 1D coordination polymers of copper (Li et al, 2008) and lanthanide/iron mixed-metal 3D coordination polymers (He et al, 2017). There are two C-HÁ Á ÁO interactions between the ortho hydrogens of one -picoline ligand and the oxygens of two sulfate ions (Table 1).…”

“…reported structures demonstrating sulfate ions with [3.2110] bridging modes are with copper (DOHKIV, DOHKIB:Li et al, 2008) or mixtures of lanthanides with iron(He et al, 2017), including dysprosium (DADNOO), erbium…”

The first in situ organosulfonate-templated 3-fold interpenetrating framework built from rare tetrahedral [Cu4(μ4-SO4)] SBUs

“…The Cu-O and Cu-N bond lengths around Cu1 ion are somewhat longer than those of Cu2 ion. Both the angles of the two Cu(I) ions, ranging from 98.23 (14) to 153.46 (16) , are obviously deviated from the ideal trigonal geometry (Table 2). The sulfate anions with the m 4 -h 1 :h 1 :h 1 :h 1 coordination mode bridge adjacent four Cu(I) ions to form a rare tetrahedral [Cu 4 (m 4 -SO 4 )] SBU, which are further linked by parallel double 4,4 0 -bipys to generate a diamondoid network formed of large adamantanoid cages (Fig.…”