Syntheses, structures, and photoluminescence of three cadmium(II) coordination polymers with flexible bis(benzimidazole) ligands

Jiao, Cui-Huan; He, C.; Geng, Jian‐Chen; Cui, Guang‐Hua

doi:10.1080/00958972.2012.706283

Cited by 30 publications

(4 citation statements)

References 61 publications

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“…As seen in Figure 7a, upon excitation at 241 nm, compound 1 showed two main luminescent emission peaks at 395 nm and 290 nm, while the main emission bands of both 2 and intermediate [BzQl]Br were found at 289 nm and 394 nm (Figure 7b), which may be attributed to the π*→π or n→π transition [27]. In addition, compounds 1 and 2 exhibited a strong emission band at 408 nm and a relatively weak emission band at 448 nm, which may be tentatively assigned to the metal-to-ligand charge transfer band between the Co(II) and the unoccupied π* orbitals of the isothiocyanate groups [28]. It is noteworthy that the luminescence intensity of λ max in 2 (186.9 a.u) is much stronger than the intermediate [ …”

Section: Luminescent Propertiesmentioning

confidence: 94%

Two Organic Cation Salts Containing Tetra(isothiocyanate)cobaltate(II): Synthesis, Crystal Structures, Spectroscopic, Optical and Magnetic Properties

Zhang

Yan

et al. 2017

Crystals

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Abstract:Single crystals of two hybrid organic-inorganic molecular solids, benzyl pyridinium tetra(isothiocyanate)cobalt ([BzPy] 2 [Co(NCS) 4 ]) (1) and benzyl quinolinium tetra(isothiocyanate)cobalt ([BzQl] 2 [Co(NCS) 4 ]) (2), were grown using a slow evaporation growth technique at room temperature and their IR, UV-Vis, X-ray crystal structures, luminescence, and magnetism were reported. The crystal structural analysis revealed that two molecular solids crystallize in the monoclinic space group P2 1 /c of 1 and P2 1 /n of 2. The cations form a dimer through weak C-H···π/π···π interactions in 1 and 2, and the adjacent cation (containing N(6) atom) in 2 forms a columnar structure through π···π weak interactions between the quinoline and benzene rings, while the anions in 1 form a layer structure via short S···Co interactions. The anions (A) and cations (C) are arranged alternatively into a column in the sequence of ···A-CC-A-CC-A··· for 1, while the two anions and cationic dimer in 2 form an alliance by the C-H···π, C-H···S and C-H···N hydrogen bonds. A weak S···π interaction was found in 1 and 2. The two molecular solids show a broad fluorescence emission around 400 nm in the solid state at room temperature, and weak antiferromagnetic coupling behavior when the temperature is lowered.

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Section: Luminescent Propertiesmentioning

confidence: 94%

Two Organic Cation Salts Containing Tetra(isothiocyanate)cobaltate(II): Synthesis, Crystal Structures, Spectroscopic, Optical and Magnetic Properties

Zhang

Yan

et al. 2017

Crystals

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“…As the structures of coordination polymers are strongly influenced by the organic ligands and metal ions [15,16,31], it is important to choose suitable ligands and metal ions under appropriate synthetic conditions in order to synthesize coordination complexes with interesting structures. The flexibility of the ligand is a key parameter to direct the assembly into polymers instead of frameworks [17].…”

Section: Fabrication Of Metal Coordination Polymersmentioning

confidence: 99%

“…As aforementioned, the assembly of benzimidazole and its derivatives has been utilized for the fabrication of stable materials with applications in several fields [39][40][41][42], some of them collected in Table 1: sensor fabrication [22], drug delivery systems [35], fuel cell design, biomedicine [43], conductivity in liquid crystals [23], or the fabrication of nanostructures [17].…”

Section: Recent Applications Of Assembled Materials and New Perspectivesmentioning

confidence: 99%

Supramolecular Assembly of Benzimidazole Derivatives and Applications

Beloqui¹

2019

Chemistry and Applications of Benzimidazole and Its Derivatives

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Herein, we focus on the chemical and physical properties of benzimidazole and its derivatives used for the synthesis of supramolecular materials. The design and modification of benzimidazole opens the scope of the diversity of structures (different sizes and morphologies) that can be built. The synthesized materials include not only small coordination complexes but also isolated crystals, metal-organic frameworks, metal-coordination polymers, smart nanocontainers, and more advanced macrostructures such as microflowers and nanowires. These supramolecular structures are based on noncovalent interactions, mostly on metal coordination chemistry and π-π stacking interactions. Moreover, the same molecule, due to its chemical structure, can undergo both sorts of interactions in order to induce the self-assembly into supramolecular materials. In this process, as it is shown in this chapter, the conditions used for the assembly determine the final structure and morphology of the fabricated macromolecule. Finally, we show most recent applications of these materials in the field of sensing, photoluminescence, fuel cell, and fabrication of new nanostructures.

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“…For example, 1,2,4,5-benzene tetracarboxylate (btec) has various coordination modes to metal ions, resulting from completely or partially deprotonated sites, which allows for the diversity of framework topologies of MOFs. On the other hand, the most prominent compound of benzimidazole derivatives is 5,6-dimethylbenzimidazole, which serves as an axial ligand for cobalt in vitamin B 12 [10][11][12][13]. To the best of our knowledge, coordination polymers based on flexible bis (5,6-dimethybenzimidazole) and multicarboxylic acid ligands have only been scarcely studied [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

A NEW 2D COBALT(II) COORDINATION POLYMER CONSTRUCTED FROM 1,2,4,5-BENZENETETRACARBOXYLATE AND FLEXIBLE bis(BENZIMIDAZOLE) LIGANDS

2015

JSC

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A new 2D cobalt(II) coordination polymers namely {[Co 2 (btec)(L) 2 ]⋅4H 2 O} n (1), where btec = = 1,2,4,5-benzenetetracarboxylate and L = 1,3-bis(5,6-dimethylbenzimidazol-l-yl)-2-propanol, are hydrothermally synthesized and characterized by elemental analyses, IR spectroscopy, and single crystal X-ray diffraction analyses. The structure analysis indicates that the compound belongs to the triclinic system, space group Pī, a = 12.198(2)The complex possesses a binodal (3,4)-connected two-dimensional layered structure bridged by btec and L ligands. The fluorescence and catalytic properties of the complex are also investigated.

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Syntheses, structures, and photoluminescence of three cadmium(II) coordination polymers with flexible bis(benzimidazole) ligands

Cited by 30 publications

References 61 publications

Two Organic Cation Salts Containing Tetra(isothiocyanate)cobaltate(II): Synthesis, Crystal Structures, Spectroscopic, Optical and Magnetic Properties

Two Organic Cation Salts Containing Tetra(isothiocyanate)cobaltate(II): Synthesis, Crystal Structures, Spectroscopic, Optical and Magnetic Properties

Supramolecular Assembly of Benzimidazole Derivatives and Applications

A NEW 2D COBALT(II) COORDINATION POLYMER CONSTRUCTED FROM 1,2,4,5-BENZENETETRACARBOXYLATE AND FLEXIBLE bis(BENZIMIDAZOLE) LIGANDS

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