Substituent-controlled Constructions of M<sub>2</sub>L<sub>4</sub> Cage and 1D Network Structures for Cu(II) Complexes with Bis-benzimidazole Ligands

Narukawa, Ryo; Kobayashi, Toya; Fukunaga, Saki; Suzuki, Yuna; Kobayashi, Toshiyuki; Kondo, Mitsuru

doi:10.1246/cl.200176

Cited by 3 publications

(2 citation statements)

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“…This onedimensional coordination polymer has a stable structure as a result of the C-H•••O interaction provided by the methoxy group. Single-crystal X-ray diffraction revealed that the chain-like one-dimensional coordination polymer encapsulates a crystalline water molecule within each void [3]. Herein, we report three two-dimensional coordination polymers constructed from a bis-imidazole ligand having a tert-butyl and a methoxy group called bitbu-OMe and reveal their structure characterization.…”

Section: Introductionmentioning

confidence: 96%

Syntheses of Novel Coordination Polymers Using Bis-Imidazole Ligand Having Steric Hindrance and Methoxy Group

Fauzi

Kondo

2021

OJC

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Three novel coordination polymers are synthesized through a slow evaporation method using solvothermal technique of CuSO4•5H2O or Co(SCN)2 with bitbu-OMe. Xray diffraction analysis results reveal that 1, 2, and 3 have similar two-dimensional layer networks. The study of the effect of the methoxy group in bitbu-OMe towards the stability of ligand conformation in obtained coordination polymers becomes necessary to be conducted in the future to unveil the reason for conformation similarity of ligand in coordination polymers.

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Section: Introductionmentioning

confidence: 96%

Syntheses of Novel Coordination Polymers Using Bis-Imidazole Ligand Having Steric Hindrance and Methoxy Group

Fauzi

Kondo

2021

OJC

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“…The most common M 2 L 4 cages employ square planar Pd(II) centers and pyridine ligands. However, other transition metals such as platinum, − cobalt, − copper, − zinc, ,,, and nickel ,, have also been exploited. MOCs are capable of adsorbing reactive molecules and various chemical guests. − …”

Section: Introductionmentioning

confidence: 99%

Selective Supramolecular Recognition of Nitroaromatics by a Fluorescent Metal–Organic Cage Based on a Pyridine-Decorated Dibenzodiaza-Crown Macrocyclic Co(II) Complex

2023

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Two isomorphous fluorescent (FL) lantern-shaped metal−organic cages 1 and 2 were prepared by coordinationdirected self-assembly of Co(II) centers with a new aza-crown macrocyclic ligand bearing pyridine pendant arms (L py ). The cage structures were determined using single-crystal X-ray diffraction analysis, thermogravimetric, elemental microanalysis, FT-IR spectroscopy, and powder X-ray diffraction. The crystal structures of 1 and 2 show that anions (Cl − in 1 and Br − in 2) are encapsulated within the cage cavity. 1 and 2 bear two coordinated water molecules that are directed inside the cages, surrounded by the eight pyridine rings at the "bottom" and the "roof" of the cage. These hydrogen bond donors, π systems, and the cationic nature of the cages enable 1 and 2 to encapsulate the anions. FL experiments revealed that 1 could detect nitroaromatic compounds by exhibiting selective and sensitive fluorescence quenching toward pnitroaniline (PNA), recommending a limit of detection of 4.24 ppm. Moreover, the addition of 50 μL of PNA and o-nitrophenol to the ethanolic suspension of 1 led to a significant large FL red shift, namely, 87 and 24 nm, respectively, which were significantly higher than the corresponding values observed in the presence of other nitroaromatic compounds. The titration of the ethanolic suspension of 1, with various concentrations of PNA (>12 μM) demonstrated a concentration-dependent emission red shift. Hence, the efficient FL quenching of 1 was capable of distinguishing the dinitrobenzene isomers. Meanwhile, the observed red shift (10 nm) and quenching of this emission band under the influence of a trace amount of o-and p-nitrophenol isomers also showed that 1 could discriminate between o-and p-nitrophenol. Replacement of the chlorido with a bromido ligand in 1 generated cage 2 which was a more electron-donating cage than 1. The FL experiments showed that 2 was partially more sensitive and less selective toward NACs than 1.

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Multinuclear coordination compounds constructed by bis-imidazole and azide ligands. Creation of new network structures and an M2L4 cage that includes two anions

Koike,

Yamanishi,

Watanabe

et al. 2024

Chemistry Letters

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Treatment of the bis-imidazole ligand, bitb, with CuSO4·5H2O, ZnSO4·7H2O, and Co(NO3)2·6H2O in the presence of NaN3 produced [Cu2(μ-N3)2(bitb)(N3)2]n (1), [Zn(bitb)(N3)2]n (2), and [(N3)2 ⊂ Co2(bitb)4(N3)2](Me2CO)2·(H2O)4 (3). Compound 1 is a 2D coordination polymer with {Cu2(μ-N3)2}n chains in the framework. Compound 2 is a 1D coordination polymer with repetitions of the “figure-of-eight-shaped” turns. Compound 3 is an M2L4 cage compound that includes 2 N3− in the cage. Their unprecedented coordination structures are described.

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Substituent-controlled Constructions of M₂L₄ Cage and 1D Network Structures for Cu(II) Complexes with Bis-benzimidazole Ligands

Cited by 3 publications

References 54 publications

Syntheses of Novel Coordination Polymers Using Bis-Imidazole Ligand Having Steric Hindrance and Methoxy Group

Syntheses of Novel Coordination Polymers Using Bis-Imidazole Ligand Having Steric Hindrance and Methoxy Group

Selective Supramolecular Recognition of Nitroaromatics by a Fluorescent Metal–Organic Cage Based on a Pyridine-Decorated Dibenzodiaza-Crown Macrocyclic Co(II) Complex

Multinuclear coordination compounds constructed by bis-imidazole and azide ligands. Creation of new network structures and an M2L4 cage that includes two anions

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Substituent-controlled Constructions of M2L4 Cage and 1D Network Structures for Cu(II) Complexes with Bis-benzimidazole Ligands

Cited by 3 publications

References 54 publications

Syntheses of Novel Coordination Polymers Using Bis-Imidazole Ligand Having Steric Hindrance and Methoxy Group

Syntheses of Novel Coordination Polymers Using Bis-Imidazole Ligand Having Steric Hindrance and Methoxy Group

Selective Supramolecular Recognition of Nitroaromatics by a Fluorescent Metal–Organic Cage Based on a Pyridine-Decorated Dibenzodiaza-Crown Macrocyclic Co(II) Complex

Multinuclear coordination compounds constructed by bis-imidazole and azide ligands. Creation of new network structures and an M2L4 cage that includes two anions

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Substituent-controlled Constructions of M₂L₄ Cage and 1D Network Structures for Cu(II) Complexes with Bis-benzimidazole Ligands