Five coordination polymers of Cd(II) and Co(II) using 3,3′-azobispyridine and different dicarboxylates: Synthesis, structures and adsorption properties

Photo‐/Electroinduced Irreversible Isomerization of 2,2’‐Azobispyridine Ligands in Arene Ruthenium(II) Complexes

“…It is also a wellknown ligand for metal center, [1] with resulting complexes used as magnetic resonance imaging probes, [2] cytotoxic agents against cancer cell, [3][4][5] or as building components in switchable materials. [6][7][8][9][10] The ligand properties of azobispyridine have been investigated towards a number of metals, such as Cd II , [11][12][13][14][15][16] Cu II , [13,15,17,18] Re I , [19][20][21] Cu I , [13,18,22] Ni II , [13,15,23] Zn II , [15,23] Ru II , [24,25] Ag I , [26,27] Co II , [11,13] Re II and Re V , [21] Pt II , [28] Hg II , [15] Au I , [26] Mn II , [13] W 0 and Os 0 , [29] and Ti II , [30] giving rise to new types of polymer structures involving π-π and π-p stacking of the ligand. [13][14][15]…”

“…[13][14][15][16]30] The coordination properties to the metal center are obviously impacted by the position of the nitrogen atom in the pyridine ring of the ligand. Linear patterns such as I and II are most common for 4,4'-and 3-3'-azobispyridine [11][12][13][14][15]19,20,22,24,27,29] (Figure 1), while bidentate coordination mode with five-membered chelate rings such as IIIa, [16][17][18]21,23,26,28] or more rarely tridentate coordination such as IIIb, are found with (E)-2,2'-azobispyridine. [31,32] A peculiar property of the latter ligand in these systems is that it usually does not undergo E/Z photoisomerization as a consequence of the geometrical constraints imposed by the strong bonding to the metal center, with one notable exception found in the case of Ag I complex.…”

Two-Dimensional Metal-Organic Framework Materials: Synthesis, Structures, Properties and Applications

“…It consists of Cu 2 (μ-X) fragments with tetrahedral Cu­(I) centers and μ 2 -bridging mode of ligand . Several other related complexes displaying the common undulated 2D (4,4) network are provided in the literature as well. ,− Further, a few examples of 2D (4,4)-connected curled sheets with double helical chains have also been observed in the literature. − …”

3D construction of a cobalt(ii) coordination polymer as a photocatalyst for the degradation of methyl green dye under visible light and its mechanistic pathway

“…However, polycarboxylates and N–N-donor spacers are the most accepted strategies for designing functional materials CPs. 24–27…”