Two 2D sliver complexes with a symmetric and noncentrosymmetric architecture controlled by the metal–ligand ratio

Abstract

By controlling the metal–ligand ratio, we obtained two 2D sliver complexes from a symmetric to noncentrosymmetric architecture based on 2,2′-phosphinico-dibenzoic acid (H3L). The four groups around the phosphorus atom of the L3− ligand connect the Ag(i) ions through different coordination modes to form a noncentrosymmetric complex 2.

Series of coordination polymers based on 4-(5-sulfo-quinolin-8-yloxy) phthalate and bipyridinyl coligands: Structure diversity and properties

“…Benzene and pyridyl rings of spqa anion are noncoplanar, but are twisted with each other, with dihedral angle of 65.47°between the hydroxylquinoline plane and benzene plane from isophthalate moiety. They are closely similar to those found in other reported Ag(I) complex [47], or the other observed three-coordinated Ag(1) ion with N donor ligands [48,49]. Interestingly, for Ag(1)-O bond length 2.75 Å is also close to the values found in Ag(1) complexes bearing bpe and adamantanedicarboxylate ligands [50].…”

Effect of Charge on the Structures of Zn(II) Coordination Polymers with Triazole-carboxylate Ligands: Syntheses, Structures, and Luminescent Properties

“…Through varying metal centers and organic linkers, CPs with specific characteristics can be obtained [8][9][10][11][12][13]. But in fact, the rational design and tuned synthesis of CPs still remains a major challenge since assembly is influenced by many factors such as the coordination requirements of the metal ions and the properties of the ligands, including shape, coordination mode, and flexibility, metal-to-ligand ratio, temperature, pH, solvent, and so on [14][15][16][17][18][19][20][21]. In addition, the assembly rule must concern the charges of metal ions and organic linkers since the final CPs are electrically neutral.…”

Structural Diversity and Magnetic Properties of Seven Coordination Polymers Based on the 2,2′-Phosphinico-dibenzoate Ligand

“…Coordination polymers (CPs) and metal–organic frameworks (MOFs) formed by linking metal ions through multifunctional ligands are attracting wide attention, − owing to their great potential in gas adsorption, catalysis, ion exchange, molecular magnet, luminescence, and sensors as well as their beautiful architecture. − In controlling the structural feature of CPs, the organic linker and coordination geometry adopted by the metal ion are two primary factors. − Poly­(carboxylic acid)­s are a sort of very important organic linker, which have been widely used to construct CPs and MOFs. − Among the reported significant works based on V-shaped semirigid polycarboxylate ligands, − a series of bifunctional carboxyphosphinate ligands remain largely unexplored. − Metal phosphonates are a class of important organic–inorganic hybrid materials with beautiful architectures as well as interesting physical properties, such as sorption, catalysis, optical properties, and magnetism. − Although many fruitful works have been reported on phosphonate compounds, the compounds based on phosphinic acid derived from phosphonic acid have rarely been investigated. , 2,2′-Phosphinico-dibenzoic acid (H 3 L) is a V-shaped semirigid carboxyphosphinate ligand, which was synthesized by Segall et al 40 years ago . Nevertheless, only two coordination compounds [Ag­(H 2 L)] n and [Ag 3 (L)] n involving H 3 L have been reported by us to date . As a good candidate of building block for construction of coordination polymers, H 3 L exhibits several interesting characteristics: (i) It can be partially or completely deprotonated to generate H 2 L – , HL 2– , and L 3– anions by controlling the pH value carefully, which allows the anion ligands to display various coordination modes (Scheme ).…”

“…(ii) Contributing two carboxylate groups and one phosphinate unit, these multifunctional coordination sites provide a high likelihood for construction of multidimensional frameworks. (iii) It easily forms a chiral center with different coordination modes based on four groups around the phosphorus atom …”

“…32 Nevertheless, only two coordination compounds [Ag(H 2 L)] n and [Ag 3 (L)] n involving H 3 L have been reported by us to date. 33 As a good candidate of building block for construction of coordination polymers, H 3 L exhibits several interesting characteristics: (i) It can be partially or completely deprotonated to generate H 2 L − , HL 2− , and L 3− anions by controlling the pH value carefully, which allows the anion ligands to display various coordination modes (Scheme 1). (ii) Contributing two carboxylate groups and one phosphinate unit, these multifunctional coordination sites provide a high likelihood for construction of multidimensional frameworks.…”