Syntheses, structures, luminescent properties and antibacterial activities of seven polymers based on an asymmetric triazole dicarboxylate ligand

Synthesis, Structures and Magnetic Properties of CuII and CoII Compounds Based on Asymmetric 5‐(1H‐Imidazole‐1‐yl)‐3‐pyridine Carboxylic Acid

“…The Co–O bond length vary from 2.1314(1) Å to 2.157(2) Å (N1–Co1–N1A = O2–Co1–O2A = 180°) and Co–N is 2.096 (2) Å, ions are linked to form a 1D linear supramolecular structure through C‐H ··· O hydrogen bonds (Figure d) along the b plane. The H ··· O distances (bond angles) are 2.77(19) Å (168°) for O1–H1B ··· O5 and 2.674(16) Å (163°) for O1–H1A ··· O4 which agrees well with those reported in the literatures (Table S2) . The adjacent linear chains are further outspread to form a 2D supramolecular structure (Figure b) through weak π ··· π interactions between the adjacent benzene rings (interplanar separation: 3.435 Å; centroid‐centroid separation: 3.695 Å) .…”

“…These 1D chains are further organized into an extended 2D supramolecular structure through weak π ··· π stacking interactions along the ac plane with centroid‐centroid separation: 3.6556(2) Å [inter‐planar separation of 3.4723(2) Å] (Figure a, Figure c). The 2D layers are further stacked into a 3D supramolecular structure by hydrogen bonds C1–H1 ··· O1 (3.327 Å, 150.63°) and C6–H6 ··· O1 [2.354(4) Å, 151.50°] (Table S2) . Both these above interactions extend the 2D supramolecular structure into 3D supramolecular structure (Figure d).…”

“…[48][49][50] In this structure, the adjacent Co (Table S2). [51][52][53][54] Both these above interactions extend the 2D supramolecular structure into 3D supramolecular structure (Figure 2d).…”

“…The Co-O bond length vary from 2.1314(1) Å to 2.157(2) Å (N1-Co1-N1A = O2-Co1-O2A = 180°) and Co-N is 2.096 (2) Å, ions are linked to form a 1D linear supramolecular structure (Table S2). [51][52][53][54] The adjacent linear chains are further outspread to form a 2D supramolecular structure ( Figure 4b) through weak π•••π interactions between the adjacent benzene rings (interplanar separation: 3.435 Å; centroid-centroid separation: 3.695 Å). [39][40][41][42][43][44][45] Both these interactions stabilize the supramolecular structure and further result in a 3D supramolecular structure (Figure 4c).…”

Two N,N′-bis(pyridin-4-yl)pyridine-2,6-dicarboxamide coordination compounds

“…This bonding feature, when combined with the flexibility and length of molecular backbone within these ligands, can lead to the construction of porous coordination compounds (Gao et al, 2003;Hagrman et al, 1999;Li et al, 2017). A variety of heterocyclic nitrogenderivative complexes with interesting properties and topologies have been synthesized using ligands such as 4,4 0 -bipyridine (Fujita et al, 1994), an asymmetric triazole dicarboxylate ligand (Hao et al, 2018), 5-(pyridine-3-yl)pyrazole-3-carboxylic acid (Cheng et al, 2016), 2-[4-(1H-imidazole-1-ylmethyl)-1H-1,2,3-triazol-1-yl] acetic acid (Yu et al, 2016) and 2,2 0 -dihydroxy-[1,1 0 ]binaphthalenyl-3,3 0 -dicarboxylate (Zheng et al, 2004). Heterocyclic ligands containing aromatic systems continue to attract our interest because they can form variousstacking interactions between pyridine rings and direct the crystal packing and molecular assembly (Tomura & Yamashita, 2001;Li et al, 2012…”