A Series of 1D, 2D, and 3D Coordination Polymers Based on Flexible 3‐Carboxy‐1‐Carboxymethyl‐2‐Oxidopyridinium and Different N‐Donor Ligands – Syntheses, Structures, and Luminescent Properties

Abstract

Twelve new coordination polymers, namely, [Pb(L)] (1), [Mn2(L)2(H2O)] (2), [Mn(L)(H2O)] (3), [Zn3(L)2(H2O)4] (4), [Zn(L)(pbib)0.5]·1.5H2O (5), [Cd(L)(pbib)0.5]·2H2O (6), [Zn(L)(bbtz)0.5]·H2O (7), [Zn(L)(bbmb)0.5] (8), [Co(L)(bbmb)0.5(H2O)] (9), [Zn(L)(biim‐6)0.5]·2H2O (10), [Cd(L)(biim‐6)0.5]·2H2O (11), and [Cd(L)(biim‐4)0.5]·2H2O (12) have been synthesized under hydrothermal conditions [H2L = 3‐carboxy‐1‐carboxymethyl‐2‐oxidopyridinium, pbib = 1,4‐bis(imidazol‐1‐ylmethyl)benzene, bbtz = 1,4‐bis(1H‐1,2,4‐triazol‐1‐ylmethyl)benzene, bbmb = 1,1′‐(1,4‐butanediyl)bis(2‐methylbenzimidazole), biim‐6 = 1,1′‐(1,6‐hexanediyl)bis(imidazole), and biim‐4 = 1,1′‐(1,4‐butanediyl)bis(imidazole)]. Compound 1 features 1D double‐chain structures, which are further linked by C–H···O hydrogen‐bonding interactions to form a 3D supramolecular architecture. Compounds 2–11 have 2D layer structures. Compound 2 possesses a 2D (42·64) layer. Compound 3 exhibits a 2D undulated 44‐squar lattice (sql) sheet. The 2D layers of 2 and 3 are further connected by intermolecular hydrogen‐bonding interactions, which lead to 3D supramolecular architectures. The structure of 4 is a 2D (3,4)‐connected net with the (42·62·82)(42·6) topology. Compounds 5–7 have similar structures and show 2D networks with 4‐connected 44‐sql topologies. Compounds 8 and 9 have similar structures and display (3,4)‐connected networks with the (42·6)(42·63·8) topology. Compounds 10 and 11 reveal similar 4‐connected 44‐sql nets. The 2D layers of 5–11 are further extended into 3D supramolecular architectures through π–π interactions. Compound 12 has a 3D (65·8) CdSO4‐type framework. The thermal stabilities of 1–12 have been studied by thermogravimetric analysis. The luminescent properties for 4–8 and 10–12 have also been investigated in detail.

Syntheses, Structures and Catalytic Properties of Cobalt(II) and Silver(I) Coordination Polymers Based on Flexible Bis(2-methyl benzimidazole) and Dicarboxylic Acids

“…3. There is no absorption band around 1700 cm -1 for 1 indicating that all carboxyl groups of the organic moieties are completely deprotonated, while the absorption band in 1690 cm -1 for 2 proves that 1,4-Hndc -ligand is incompletely deprotonated [27][28][29]. The strong peaks at 1620 and 1460 cm -1 for 1, 1650 and 1420 cm -1 for 2, may be attributed to the asymmetric and symmetric vibrations of carboxylate groups.…”

“…2a). Ag-O distance is 2.460(2) Å , and the Ag-N distance is Ag1-N1 = 2.216(2) Å and Ag1-N3 = 2.194(2) Å , which are all in the normal range [27,28].…”

Syntheses, crystal structures and luminescent properties of Cu(II)/Zn(II) coordination polymers based on bis(1,2,4-triazol-1-ylmethyl)benzene position isomers and 5-nitroisophthalic acid

“…n transitions and is very weak compared to that of the p ⁄ ? p transition of the N-donor ligand, so the H 2 nip has almost no contribution to the fluorescent emission of complexes 1 and 2 [34]. Thus, the emission may be assigned to the N-donor ligand.…”

Coordination polymers of the bis(imidazole) ligand modulated by dicarboxylate ligands: From 2D layer to 3D framework

“…Only two examples have been reported for polyoxometallates (POMs) [20][21]. On the other hand, multidentate organic carboxylate ligands have been extensively employed in the construction of CPs with diverse structures and excellent properties, not only because of their many types of bridging coordination modes, but also because of their potential function as hydrogen-bonding acceptors and donors [22][23][24][25].…”