Divalent metal homophthalate coordination polymers with long-spanning dipyridyl ligands containing piperazine moieties

Rogers, Ciana M.; Wang, Curtis Y.; Farnum, Gregory A.; LaDuca, Robert L.

doi:10.1016/j.ica.2013.01.005

Cited by 8 publications

(5 citation statements)

References 28 publications

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“…The asymmetric H 2 HPA ligand bearing one aromatic carboxylate and one flexible acetate arm could display various bridging modes, based on which some transition metal complexes have been reported, , however, the lanthanide one has been rarely discussed . Here, by using H 2 HPA as ligand, the one-dimensional {[Ln(HPA)(NO 3 )(H 2 O) 2 ]·H 2 O} n (Ln = Eu ( 1 ); Gd ( 2 ); Tb ( 3 ); Dy ( 4 )) and two-dimensional {[Ln 2 (HPA) 3 (H 2 O) 2 ]·H 2 O} n (Ln = Eu ( 5 ); Gd ( 6 ); Tb ( 7 ); Dy ( 8 )) coordination polymers have been prepared under hydrothermal conditions.…”

Section: Resultsmentioning

confidence: 99%

“…To continue the structural-property research along the bifunctional materials, commercially available homophthalic acid (H 2 HPA) was selected as a functional ligand to react hydrothermally with different lanthanide ions. The unsymmetric H 2 HPA contains both aromatic and aliphatic carboxylate functionalities, which could display various bridging modes to metal ions, , but even so, has rarely been documented to construct lanthanide coordination polymers . As a result of our previous continuous investigation on the H 2 HPA ligand, we present here two types of lanthanide coordination polymers, one-dimensional (1D) {[Ln(HPA)(NO 3 )(H 2 O) 2 ]·H 2 O} n (Ln = Eu ( 1 ); Gd ( 2 ); Tb ( 3 ); Dy ( 4 )) and two-dimensional (2D) {[Ln 2 (HPA) 3 (H 2 O) 2 ]·H 2 O} n (Ln = Eu ( 5 ); Gd ( 6 ); Tb ( 7 ); Dy ( 8 )).…”

Section: Introductionmentioning

confidence: 99%

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Two Types of Lanthanide Coordination Polymers Based on a Homophthalate Ligand Exhibiting Luminescence and a Significant Magnetocaloric Effect

Chen

Dong

et al. 2017

Crystal Growth & Design

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Two types of lanthanide coordination polymers based on homophthalic acid (H2HPA), one-dimensional {[Ln(HPA)(NO3)(H2O)2]·H2O} n (Ln = Eu (1); Gd (2); Tb (3); Dy (4)) and two-dimensional {[Ln2(HPA)3(H2O)2]·H2O} n (Ln = Eu (5); Gd (6); Tb (7); Dy (8)), were solvothermally synthesized. Compounds 1–4 show a one-dimensional (1D) linear chain structure consisting of a HPA2– linker and [Ln2] cluster unit. Compounds 4–8 are crystallographically isostructural and contain 1D lanthanide-carboxylate building units [Ln4(CO2)10] n built from the adjacent Ln3+ ions and carboxyl groups of the H2HPA ligands, which can further give two-dimensional layer structures via the link of HPA2–. The magnetic studies reveal that complexes 2 and 6 with isotropic Gd3+ ion exhibit significant cryogenic magnetocaloric effects with a maximum −ΔS m value of 35.58 and 35.41 J kg–1 K–1 at 2 K and 7 T, respectively. In addition, the solid-state photophysical properties of 1/5 and 3/7 respectively display strong characteristic Eu3+ and Tb3+ photoluminescent emission in the visible region, suggesting that Eu- and Tb-based luminescences are sensitized by the effective energy transfer from the ligand to the metal centers.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Two Types of Lanthanide Coordination Polymers Based on a Homophthalate Ligand Exhibiting Luminescence and a Significant Magnetocaloric Effect

Chen

Dong

et al. 2017

Crystal Growth & Design

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“…Ligand L has previously been employed as a building block for the synthesis of coordination polymers using different metal salts. [14][15][16][17] Fig. 1 However, no discrete coordination cages have been prepared using this ligand.…”

Section: Resultsmentioning

confidence: 99%

Palladium(ii) induced complete conformational enrichment of the syn isomer of N,N′-bis(4-pyridylformyl)piperazine

et al. 2014

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In the solution state, an equimolar mixture of syn-and anti-conformations is present for the ligand N,N 0bis(4-pyridylformyl)piperazine, L. Combining L with cis-Pd(en)(NO 3 ) 2 resulted in the formation of metallomacrocycle cis-[Pd 2 (en) 2 (L) 2 ](NO 3 ) 4 , 1, quantitatively. Coordinated L in complex 1 was found to exist exclusively in the syn-conformation. The equimolar mixture of syn-and anti-conformations was re-established by ethylenediamine induced demetallation of 1.

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“…Homophthalic acid [H 2 HMPH, 2-(2-carboxyphenyl)acetic acid] as a flexible asymmetric polycarboxylate ligand which has a relatively flexible ethylic carboxyl group, which may not be coplanar with the arene ring. This flexibility allows H 2 HMPH to adopt various conformations and coordination modes (Kraft et al, 2013;Rogers et al, 2013). At the same time, 4,4 0 -bis(2-methylimidazol-1-yl)biphenyl (4,4 0 -BMIBP), as a typical N-donor ligand, can be used to construct CPs with diverse structures and interesting properties because its two N-donor coordination sites can coordinate with metal ions in various modes (Zhao et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

A new two-dimensional cadmium(II) coordination polymer based on the asymmetric dicarboxylic acid homophthalic acid: synthesis, structure and properties

Shen

2022

Acta Crystallogr C

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A new coordination polymer poly[[μ2-4,4′-bis(2-methylimidazol-1-yl)biphenyl-κ2 N 3:N 3′]bis[μ3-2-(2-carboxylatophenyl)acetato-κ5 O,O′:O′,O′′:O′′]dicadmium(II)], [Cd(C9H6O4)(C20H18N4)0.5] n or [Cd(HMPH)(4,4′-BMIBP)0.5] n [H2HMPH is homophthalic acid and 4,4′-BMIBP is 4,4′-bis(2-methylimidazol-1-yl)biphenyl], (I), was synthesized by the solvothermal method and was structurally characterized by means of single-crystal X-ray diffraction, IR spectroscopy and elemental analysis. Coordination polymer (I) exhibits a two-dimensional layer based on one-dimensional [Cd(HMPH)] n chains. Remarkably, photocatalytic degradation experiments on methylene blue (MB) indicated that (I) exhibits an obvious degradation effect. Moreover, an investigation of the luminescence properties of (I) revealed that it could be considered as a potential highly selective luminescence sensor for nitrofurantoin (NFT).

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Divalent metal homophthalate coordination polymers with long-spanning dipyridyl ligands containing piperazine moieties

Cited by 8 publications

References 28 publications

Two Types of Lanthanide Coordination Polymers Based on a Homophthalate Ligand Exhibiting Luminescence and a Significant Magnetocaloric Effect

Two Types of Lanthanide Coordination Polymers Based on a Homophthalate Ligand Exhibiting Luminescence and a Significant Magnetocaloric Effect

Palladium(ii) induced complete conformational enrichment of the syn isomer of N,N′-bis(4-pyridylformyl)piperazine

A new two-dimensional cadmium(II) coordination polymer based on the asymmetric dicarboxylic acid homophthalic acid: synthesis, structure and properties

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