A series of entangled coordination polymers assembled by a V-shaped bisimidazole ligand and various dicarboxylic acids: synthesis, characterization and luminescence properties

Abstract

Based on a V-shaped bisimidazole ligand and various dicarboxylic acids, nine entangled coordination polymers, namely, ijZnIJo-bdc)IJbips)]·2H 2 O (1), ijZn 2 IJcdc) 2 IJbips) 2 ]·2H 2 O (2), ijZn 2 IJbpedc) 2 IJbips) 2 ] (3), ijZnIJodc)IJbips)] ·H 2 O (4), ijZn 2 IJsdc) 2 IJbips) 2 ]·5H 2 O (5), ijCo 2 IJsdc) 2 IJbips) 2 IJH 2 O)]·2H 2 O (6), ijCd 2 IJbpdc) 2 IJbips) 2 ]·3H 2 O (7), ijCd 2 IJ2,6ndc) 2 IJbips) 2 IJH 2 O) 2 ]·2H 2 O (8) and ijCdIJ1,4-ndc)IJbips)]·DMF·H 2 O (9) (bips = bisIJ4-imidazol-ylphenyl)sulfone, o-H 2 bdc = o-phenyldicarboxylic acid, H 2 cdc = 1,4-cyclohexanedicarboxylic acid, H 2 bpedc = 4,4′stibenedicarboxylic acid, H 2 odc = 4,4′-oxybisbenzoic acid, H 2 sdc = 4,4′-sulfonyldibenzoic acid, H 2 bpdc = biphenyl-4,4′-dicarboxylic acid, 1,4-H 2 ndc = naphthalene-1,4-dicarboxylic acid, 2,6-H 2 ndc = naphthalene-1,4-dicarboxylic acid), have been synthesized and structurally characterized. Compound 1 exhibits a 2D → 2D polycatenane of 3-fold interpenetrated sql layers. Compound 2 shows a 2D → 3D polycatenane of 3-fold interpenetrated sql layers. Compound 3 displays a 2D → 3D polycatenane of 5-fold interpenetrated sql layers. Compound 4 exhibits a 2-fold interpenetration of CdSO 4 networks. Compound 5 presents a 2D → 3D polycatenane by three-fold interpenetrated {4 2 ·6 3 ·8} 2 layers. Compound 6 features an unusual 2D → 2D polycatenane framework assembled by the entanglement of sql layers containing 2-membered loops.Compound 7 exhibits a 1D → 3D polycatenane by the 3-fold interpenetration of 3-connected ribbons.Compound 8 displays a 3-fold interpenetration of SrAl 2 networks. Compound 9 exhibits a 4-fold interpenetration of dia networks in a [2 + 2] mode. Their luminescence properties were also measured. CrystEngCommThis journal is

Neutral Luminescent Metal-Organic Frameworks: Structural Diversification, Photophysical Properties, and Sensing Applications

“…For such a purpose, a fluorescent linker such as 2,6-H 2 NDC has been introduced for two reasons: (i) to help in the formation of diversified structure due to the presence of a planar naphthalene moiety between two carboxylates oriented at an angle of 180° which is similar to that for H 2 adc but with an aromatic ring and (ii) to have sensing applications due to its fluorogenic nature. In addition to the compounds with 2,6-NDC mentioned above, − , several other compounds with 2,6-NDC have been reported in the literature but not utilized for sensing applications …”

Coordination Polymers Based on Highly Emissive Ligands: Synthesis and Functional Properties

“…One of the complexes prepared in [84] utilizes H 2 sdc as co-ligand for building of the Zn 2+ based framework.…”

Three new V‐shape dicarboxylate coordination polymers: syntheses, crystal structures and properties

“…[16][17][18] Through literature research, we found that 4,4'-dicarboxybiphenyl sulfone (H 2 SDBA) as a Vshaped dicarboxylate ligand is an good candidate and has been widely employed as the organic building block for the construction of novel coordination frameworks independently or in combination with N-donor auxiliary ligands. [19][20][21][22][23] (2) and [Cu(SDBA) 0.5 (μ 2 -OH)] n (3) (H 2 SDBA=4,4'-dicarboxybiphenyl sulfone, im = imidazole, DMA = N,N'-dimethylacetamide). The structures of CPs 1-3 have been described, and the luminescent properties of 1-2, gas adsorption properties of 2 a (solvent-free form of 2) and photocatalytic property of 3 have also been investigated.…”

“…Among the reported CPs, polydentate organic carboxylic acid ligands have been proven to be one of the most effective organic building blocks to bind metal ions into well‐defined crystalline functional materials, [13–15] and lots of CPs with high thermal stabilities and promising functional properties have been synthesized by using the polycarboxylate ligands [16–18] . Through literature research, we found that 4,4’‐dicarboxybiphenyl sulfone (H 2 SDBA) as a V‐shaped dicarboxylate ligand is an good candidate and has been widely employed as the organic building block for the construction of novel coordination frameworks independently or in combination with N‐donor auxiliary ligands [19–23] . The characteristics of H 2 SDBA is the appropriate angle and spacer length between two coordination carboxylate groups.…”