Zinc(<scp>ii</scp>) coordination polymers with substituted benzenedicarboxylate and tripodal imidazole ligands: syntheses, structures and properties

Hua, Jiai; Zhao, Yue; Liu, Qing; Zhao, Dan; Chen, Kai; Sun, Wei‐Yin

doi:10.1039/c4ce00835a

Cited by 60 publications

(42 citation statements)

References 108 publications

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“…However, the H2nobda ligand shows weak emission maxima at 420 nm upon excitation at 338 nm, much lower than that of the π-conjugated H2L ligand, because the fluorescent emission of the π* → n transition resulting from benzene-dicarboxylate ligands could nearly be neglected in comparison with that arising from the π* → π transition of the π-conjugated H2L ligand. Therefore, benzene-carboxylate ligands made almost no contribution to the fluorescent emission of supermolecular polymer [31,32]. In this compound, the emission bands of complex 1 is 20 nm blue-shifted, and it shows intensive emission in comparison to the free H2L ligand (Figure 11), which may be the intraligand fluorescence, since the free ligand exhibited a similar emission under the same condition [33,34].…”

Section: Photoluminescent Propertymentioning

confidence: 92%

Synthesis, Crystal Structure, and Properties of a New Coordination Polymer Built from N/O-Donor Mixed Ligands

et al. 2018

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The coordination polymer, namely, [Cd(H 2 L)(nobda)] n (1) was prepared by the reaction of Cd(NO 3 ) 2 ·4H 2 O with 4-amino-1,2-benzenedicarboxylic acid (H 2 nobda) and 1,4-di(1H-imidazol-4-yl)benzene (H 2 L), and characterized by single-crystal X-ray diffraction, elemental analysis, infrared (IR) spectroscopy, thermogravimetric analysis, and powder X-ray diffraction (PXRD). The carboxylic acid of H 2 nobda ligands was completely deprotonated to be nobda 2− anions, which act as tridentate ligand to connect the Cd 2+ to form two-dimensional (2D) network, while the neutral H 2 L ligands serve as a linear didentate bridge to connect two adjacent Cd 2+ ions upper and down the 2D layer. The adjacent 2D layers were further linked into the three-dimensional (3D) supramolecular polymer by the weak interactions such as hydrogen bonds and π−π stacking interactions. The ultraviolet-visible (UV-vis) absorption spectra and luminescent properties in the solid state at room temperature have been investigated.

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Section: Photoluminescent Propertymentioning

confidence: 92%

Synthesis, Crystal Structure, and Properties of a New Coordination Polymer Built from N/O-Donor Mixed Ligands

et al. 2018

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“…The free H 2 L ligand shows intense emission band at 455 nm upon excitation at 342 nm, which may be attributed to π* → π transition of the intraligands because the aromatic nucleus of H 2 L ligand are coplane [25]. However, the H 3 pza nearly does not show fluorescence because the fluorescent emission of benzene-dicarboxylate ligands resulting from the π* → n transition is very weak compared with that of the π* → π transition of the H 2 L ligand, therefore, benzene-carboxylate ligands almost have no contribution to the fluorescent emission of as-synthesized coordination polymers [16,26]. It can be seen that complex 1 exhibits strong broad blue photoluminescence with emission maxima at 420 nm upon excitation at 338 nm.…”

Section: Photoluminescent Propertymentioning

confidence: 99%

Synthesis, Crystal Structures, and Properties of a New Supramolecular Polymer Based on Mixed Imidazole and Carboxylate Ligands

et al. 2017

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One new coordination polymer, namely, [Cd 3 (H 2 L) 3 (Pza) 2 (H 2 O) 2 ] n (1) was synthesized by the reaction of Cd(NO 3) 2 •4H 2 O with 1,4-di(1H-imidazol-4-yl)benzene (H 2 L) and 3,5-pyrazoledicarboxylic acid (H 3 pza) and characterized by single-crystal X-ray diffraction, IR spectroscopy, elemental analysis, and powder X-ray diffraction (PXRD). The H 3 pza ligand was completely deprotonated to pza 3− , which bridged the Cd 2+ to form one-dimensional (1D) chain. The adjacent 1D chains were further linked into the two-dimensional (2D) layer by the linear H 2 L ligands. The weak interaction, including hydrogen bonds and π−π stacking interactions, extends the 2D layers into three-dimensional (3D) supramolecular polymer. Complex 1 shows intense light blue emission in the solid state at room temperature.

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“…The rigid tripodal ligand 1,3,5-tris(imidazol-1-yl)benzene (timb) has previously been justified as an efficient and versatile organic building unit for construction of coordination architectures [22][23][24][25]. For timb, the three imidazole groups can rotate with different dihedral angles so as to satisfy the demands of the coordination environments of the central metals in the assembly processes, producing favored arrangements with beautiful architectures [26,27].…”

Section: Introductionmentioning

confidence: 99%

Syntheses and Crystal Structures of Three Cu(II) Coordination Polymers Based on 1,3,5-Tris(imidazol-1-yl)benzene and Benzene Carboxylate Ligands

Wang

Liu

2016

J Chem Crystallogr

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Three coordination polymers, namely, Cu(HL1)(timb) (1), Cu 3 (L2) 3 (timb) 2 (H 2 O) 2 Á2H 2 OÁ4CH 3 CN (2) and Cu(L3) 0.5 (timb)ÁH 2 O (3) (timb = 1,3,5-tris(imidazol-1-yl)benzene, H 3 L1 = 1,2,4-benzenetricarboxylic acid, H 3 L2 = 1,3,5-benzenetricarboxylic acid and H 4 L3 = 1,2, 4,5-benzenetetracarboxylic acid), have been synthesized and characterized by elemental analyses, infrared spectra (IR), thermogravimetric analysis (TGA) and single-crystal X-ray diffraction. Single crystal structure analysis shows that complex 1 possesses a three-dimensional (3D) twofold interpenetrating architecture with a very rare (3,5)-connected (3Á7 2 )(3 2 Á7 5 Á8 3 ) topology. Complex 2 features an interesting 3D (3,4)-connected framework with an unprecedented (4Á8 2 ) 4 (4 2 Á8 2 Á10 2 ) 2 (8 4 Á12 2 ) topology, whereas complex 3 exhibits a novel 3D (3,4,5)-connected framework with an unusual (4Á6 3 Á8 6 ) 2 (4 2 Á8 4 )(6 3 ) 2 topology. The results reveal that the carboxylic building blocks play a significant role in promoting the diversity of the observed structural motifs. In addition, their thermal stabilities have also been investigated.Graphical Abstract Three Cu(II) complexes with unique topology have been constructed by three different benzene carboxylates and the timb ligand. The results reveal that the carboxylic building blocks play a significant role in promoting the diversity of the observed structural motifs.

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Zinc(ii) coordination polymers with substituted benzenedicarboxylate and tripodal imidazole ligands: syntheses, structures and properties

Cited by 60 publications

References 108 publications

Synthesis, Crystal Structure, and Properties of a New Coordination Polymer Built from N/O-Donor Mixed Ligands

Synthesis, Crystal Structure, and Properties of a New Coordination Polymer Built from N/O-Donor Mixed Ligands

Synthesis, Crystal Structures, and Properties of a New Supramolecular Polymer Based on Mixed Imidazole and Carboxylate Ligands

Syntheses and Crystal Structures of Three Cu(II) Coordination Polymers Based on 1,3,5-Tris(imidazol-1-yl)benzene and Benzene Carboxylate Ligands

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