A novel heterostranded double-helical coordination polymer with chiral channels emitting blue fluorescence

Crystal structure of poly[μ4-(4-(carboxylatomethyl)benzoato-κ4 O:O′:O′′:O′′′)-(2-(4-(1H-imidazol-1-yl)phenyl)-1H-benzo[d]imidazole-κN)manganese(II)] [Mn(C9H6O4)(C16H12N4)]

“…Flexible multicarboxylate ligands, expecially those with CH 2 groups between the carboxylate and the aryl moiety, have been documented recently to rotate about the C-C bond to obtain attractive topologies and interpenetration structures [13,14]. Whereas, semi-rigid aromatic multi-carboxylate ligands with rigid and flexible carboxylate groups have been rarely investigated [15,16], which may be attributed to the unpredictable structures or unfavourable crystallization conditions. Furthermore, the 2-(4-imidazol-1-yl)-1H-benzimidazole as a rigid N-donor ligand with four potential N coordination sites has rarely been concerned.…”

Synthesis, Structure, and Luminescent Property of One Zinc(II) Coordination Polymer Constructed from 2,4-Dichlorophenoxyacetic Acid and 1,1′-(1,4-Butanediyl) bis(imidazole)

“…Each Zn(II) atom is four-coordinated by two nitrogen atoms of two bbi ligands and two oxygen atoms from two 2,4-D ligands, the local coordination environment around the Zn(II) atom can be best described as a distorted tetrahedron geometry. This structure is similarly adopted by [Zn(L)(bbi)·H 2 O] n (H 2 L = 4-carboxymethylbenzoic acid), [18] {Zn (1,4-bdc) ( 3 ] n (1,4-BDOAH 2 = benzene-1,4-dioxydiacetic acid), the oxyacetate groups and benzene ring are almost coplanar, with the torsion angles being −174.2(3) • and 178.7(2) • , respectively. [21] This demonstrates the 2,4-D ligand has remarkable flexibility in contrast to the rigid aromatic carboxylic acid ligands.…”

Poly[[[μ2-1,1′-(butane-1,4-diyl)bis(1H-imidazole)-κ2N3:N3′](μ2-2,6-dimethylpyridine-3,5-dicarboxylato-κ2O3:O5)zinc] dihydrate]

“…For transition metal complexes derived from 2,6-dimethylpyridine-3,5-dicarboxylic acid, see: Chen et al (2009); Huang et al (2008); Zhang et al (2008a); Zhou et al (2009). For metal complexes derived from 1,1 0 -(butane-1,4-diyl)bis(imidazole) and carboxylic acids, see: Lan et al (2008); Tian et al (2009); Zhang et al (2008b).…”

“…As is already known, pyridine-3,5-dicarboxylic acid is a rigid and linear ligand that possesses the capability to bridge metal atoms in various coordination modes through the carboxylate O atoms and the pyridine N atom (Chen et al, 2009;Huang et al, 2008;Zhang et al, 2008a;Zhou et al, 2009). Flexible 1,1′-(butane-1,4-diyl)bis(imidazole) (bbi) ligand with organic carboxylic acids can build diverse topological architectures (Lan et al, 2008;Tian et al, 2009;Zhang et al, 2008b).…”