A (4,4)-connected zinc(II) coordination polymer constructed with the flexible 2-carboxy phenoxyacetate ligand: synthesis, conformation alteration and fluorescent properties

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Jun-Xia Li ◽  
Tian Zhang ◽  
He-Jun Chen ◽  
Zhong-Xiang Du
Keyword(s):  
Coordination Polymer ◽  
Hydrothermal Reaction ◽  
Layer Structure ◽  
Fluorescence Emission ◽  
Phenoxyacetic Acid ◽  
X Ray Diffraction ◽  
Fluorescent Properties ◽  
Sulfate Heptahydrate ◽  
X Ray ◽  
Related Compounds

Abstract A new binary ZnII coordination polymer, [Zn(2-cpa)(H2O)] n (2D-Zn) has been prepared by a 120 °C hydrothermal reaction of zinc(II) sulfate heptahydrate and 2-carboxy phenoxyacetic acid (2-H2cpa) in the presence of potassium hydroxide. Single-crystal X-ray diffraction analysis shows that the ZnII ion is located in a deformed ZnO6 octahedron bonded by one water and three 2-carboxy phenoxyacetate (2-cpa) ligands. The 2-cpa exhibits pentadentate double bridging chelate-μ 3 coordination mode and connects adjacent ZnII ions to generate a corrugated (4,4)-connected layer structure. The structures, conformation of 2-cpa and photoluminescence spectra for 2D-Zn have been carefully analyzed and compared with its two closely related compounds ̶ 1D [Zn(2-cpa)(H2O)] n (1D-Zn) and mononuclear [Zn(2-cpa)(H2O)3] (0D-Zn). The results showed that the conformation of 2-cpa in 2D-Zn has the maximum alteration and the corresponding fluorescence emission peak of 2D-Zn has the largest red-shift of 62 nm compared with that of free 2-H2cpa.

Hydrothermal synthesis, crystal structure and properties of a two-dimensional uranyl coordination polymer based on a flexible zwitterionic ligand

2018 ◽  
Vol 74 (3) ◽  
pp. 366-371 ◽  
Author(s):  
Wen Cui ◽  
Ruyu Wang ◽  
Xi Shu ◽  
Yu Fan ◽  
Yang Liu ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Hydrothermal Reaction ◽  
Two Dimensional ◽  
X Ray Diffraction ◽  
Uranyl Compounds ◽  
X Ray ◽  
Potential Applications ◽  
Ft Ir ◽  
Fuel Reprocessing ◽  
Ft Ir Spectroscopy

The interaction between the uranyl cation, (UO2)2+, and organic species is of interest due to the potential applications of the resulting compounds with regard to nuclear waste disposal and nuclear fuel reprocessing. The hydrothermal reaction of various uranyl compounds with flexible zwitterionic 1,1′-[1,4-phenylenebis(methylene)]bis(pyridin-1-ium-4-carboxylate) dihydrochloride (Bpmb·2HCl) in deionized water containing drops of H2SO4resulted in the formation of a novel two-dimensional uranyl coordination polymer, namely poly[tetraoxido{μ2-1,1′-[1,4-phenylenebis(methylene)]bis(pyridin-1-ium-4-carboxylate)}di-μ3-sulfato-diuranium(VI)], [(UO2)2(SO4)2(C20H16N2O4)]n, (1). Single-crystal X-ray diffraction reveals that this coordination polymer exhibits a layered arrangement and the (UO2)2+centre is coordinated by five equatorial O atoms. The structure was further characterized by FT–IR spectroscopy, powder X-ray diffraction (PXRD) and thermogravimetric analysis (TGA). The polymer shows high thermal stability up to 696 K. Furthermore, the photoluminescence properties of (1) has also been studied, showing it to exhibit a typical uranyl fluorescence.

A new twofold interpenetrated two-dimensional cadmium(II) coordination polymer constructed from 2,2′-(benzene-1,4-dicarboxamido)dipropionate

2018 ◽  
Vol 74 (11) ◽  
pp. 1434-1439
Author(s):  
Hong-Tao Zhang ◽  
Xiao-Long Wang
Keyword(s):  
Coordination Polymer ◽  
Coordination Polymers ◽  
Self Assembly ◽  
Fluorescence Emission ◽  
Functional Materials ◽  
Two Dimensional ◽  
X Ray Diffraction ◽  
X Ray ◽  
Carboxylate Groups ◽  
Potential Applications

In recent years, much initial interest and enthusiasm has focused on the self-assembly of coordination polymers due to the aesthetics of their crystalline architectures and their potential applications as new functional materials. As part of an exploration of chiral coordination polymers, a new twofold interpenetrated two-dimensional (2D) coordination polymer, namely, poly[[tetraaquabis[μ3-(2R,2′R)-2,2′-(benzene-1,4-dicarboxamido)dipropionato-κ5 O,O′:O′′,O′′′:O′′]dicadmium(II)] trihydrate], {[Cd2(C14H14N2O6)2(H2O)4]·3H2O} n , has been synthesized by the reaction of Cd(CH3COO)2·2H2O with the designed ligand (2R,2′R)-2,2′-(benzene-1,4-dicarboxamido)dipropionic acid (H2 L). The compound has been structurally characterized by elemental analysis, IR spectroscopy, powder X-ray diffraction and single-crystal X-ray diffraction analysis. In the crystal structure, each CdII cation binds to three carboxylate groups from two crystallographically independent L 2− dianions. Four carboxylate groups link two crystallographically independent cadmium cations into a 4,4-connected secondary building unit (SBU). The resulting SBUs are extended into a two-dimensional folding sheet via the terephthalamide moiety of the ligand as a spacer, which can be simplified as a (4,4)-connected 4,4L15 net with the point symbol (3.53.62)(32.52.62). In the lattice, two independent folding sheets interpenetrate each other to yield a double-sheet layer. The resulting 2D layers pack in parallel arrays through intermolecular hydrogen bonds and interlayer π–π interactions. The thermal stability and photoluminescence properties of the title compound have been investigated and it exhibits an enhanced fluorescence emission and a longer lifetime compared with free H2 L.

A 4′-(4-carboxyphenyl)-3,2′:6′,3′′-terpyridine-based luminescent cadmium(II) coordination polymer for the detection of 2,4,6-trinitrophenol

2019 ◽  
Vol 75 (5) ◽  
pp. 508-513 ◽  
Author(s):  
Bin Xu ◽  
Fuming Luo ◽  
Guodong Tang ◽  
Jinfang Zhang
Keyword(s):  
Coordination Polymer ◽  
Layer Structure ◽  
Three Dimensional ◽  
X Ray Diffraction ◽  
X Ray ◽  
Quenching Effect ◽  
Good Thermal Stability ◽  
Octahedral Environment ◽  
Strong Luminescence ◽  
Thermal Stability Of

The title coordination polymer, poly[bis[μ3-4-(3,2′:6′,3′′-terpyridin-4′-yl)benzoato]cadmium(II)], [Cd(C22H14N3O2)2] n or [Cd(3-cptpy)2] n , (I), has been synthesized solvothermally and characterized by IR spectroscopy, thermogravimetric analysis, and single-crystal and powder X-ray diffraction. The structure is composed of 3-cptpy− ligands bridging Cd atoms, with each Cd atom coordinated by six ligands and each ligand coordinating to three Cd atoms. Each Cd atom is in a slightly distorted trans-N2O4 octahedral environment, forming a two-dimensional layer structure with a (3,6)-connected topology. Layers are linked to each other by π–π stacking, resulting in a three-dimensional supramolecular framework. The strong luminescence and good thermal stability of (I) indicate that it can potentially be used as a luminescence sensor. The compound also shows a highly selective and sensitive response to 2,4,6-trinitrophenol through the luminescence quenching effect.

scholarly journals Synthesis, Crystal Structure, and Properties of a Zn(II) Coordination Polymer Based on a Difunctional Ligand Containing Triazolyl and Carboxyl Groups

Crystals ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 424 ◽  
Author(s):  
Jia-Le Li ◽  
Wei-Dong Li ◽  
Zi-Wei He ◽  
Shuai-Shuai Han ◽  
Shui-Sheng Chen
Keyword(s):  
Coordination Polymer ◽  
Weak Interactions ◽  
Layer Structure ◽  
Three Dimensional ◽  
Stacking Interactions ◽  
Structure And Properties ◽  
X Ray Diffraction ◽  
Visible Spectroscopy ◽  
X Ray ◽  
Uv Visible

A new compound, namely, [Zn(L)2]n (1) was obtained by the reaction of 2-methyl-4-(4H-1,2,4-triazol-4-yl) benzoic acid (HL) with ZnSO4·7H2O, and the compound was characterized by single-crystal X-ray diffraction, infrared spectroscopy, elemental analysis, powder X-ray diffraction (PXRD), and thermogravimetric analysis. The linear HL ligands were deprotonated to be L− anions and act as two-connectors to link Zn2+ to form a two-dimensional (2D) lay structure with (4, 4) topology. The large vacancy of 2D framework allows another layer structure to interpenetrate, resulting in the formation of 2D + 2D → 2D parallel interpenetration in 1. The weak interactions, such as hydrogen bonding and π–π stacking interactions, connect the adjacent 2D layers into a three-dimensional (3D) coordination polymer. The solid-state UV-visible spectroscopy and luminescent property have also been studied.

A zinc(II) coordination polymer based on a flexible bis(benzimidazole) ligand: synthesis, crystal structure and fluorescence study

2020 ◽  
Vol 75 (12) ◽  
pp. 1005-1009
Author(s):  
Geng Zhang ◽  
Xinzhao Xia ◽  
Jianhua Xu ◽  
Lixian Xia ◽  
Cong Wang ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Hydrothermal Reaction ◽  
Emission Peak ◽  
Stacking Interactions ◽  
X Ray Diffraction ◽  
Fluorescence Study ◽  
One Dimensional ◽  
X Ray ◽  
Π Stacking ◽  
Solid State Fluorescence

AbstractA new one-dimensional Zn(II) coordination polymer, {[ZnCl2(BBM)]·CH3OH}n (2,2-(1,4-butanediyl)bis-1,3-benzimidazole [BBM]), has been obtained from the hydrothermal reaction of zinc chloride with the flexible bis-benzimidazole ligand BBM and characterized by single-crystal X-ray diffraction, elemental analysis, IR and UV–vis spectra. Structural analysis has revealed that the BBM ligand connects the Zn(II) atoms to form a square-wave chain, which is further extended into supramolecular layers through hydrogen bonds and π···π stacking interactions. Solid-state fluorescence investigations showed that the Zn(II) coordination polymer has an emission peak at 381 nm upon excitation at 330 nm, which is attributed to ligand-centered luminescence. It is only slightly red shifted as compared to the ligand but partially quenched due to the strong π···π stacking interactions.

Microwave synthesis of a blue luminescent silver(I) coordination polymer with a rigid tris-triazole ligand

2020 ◽  
Vol 75 (6-7) ◽  
pp. 545-552
Author(s):  
Juan Shi ◽  
Zhen-Xiang Xia ◽  
Sheng-Chun Chen ◽  
Ming-Yang He ◽  
Qun Chen
Keyword(s):  
Coordination Polymer ◽  
Room Temperature ◽  
Hydrothermal Reaction ◽  
Chain Structure ◽  
X Ray Diffraction ◽  
Double Chain ◽  
X Ray ◽  
Triazole Ligand ◽  
Hydrolysis Of

AbstractMicrowave-assisted hydrothermal reaction of 2-fluoro-3,5,6-tri(1H-1,2,4-triazol-1-yl)-1,4-benzenedicarbonitrile (L1) with silver(I) nitrate yields a coordination polymer [Ag3(L2)2(NO3)]n (1), in which the L2 ligand (HL2 = 2-hydroxy-3,5,6-tri(1H-1,2,4-triazol-1-yl)terephthalonitrile) is obtained by in situ ligand transformation from the L1 precursor. HL2 monohydrate has also been isolated by the microwave-mediated hydrolysis of L1 and structurally characterized. Single-crystal X-ray diffraction reveals that HL2 monohydrate comprises a zwitterionic HL2 moiety, while complex 1 displays an infinite L2-bridged double-chain structure. Given that the HL2 molecule has a large conjugated π system, complex 1 exhibits strong blue luminescence in the solid state at room temperature.

A two-dimensional coordination polymer: poly[diaqua(μ4-4,4′-oxydibenzoato)(μ2-4,4′-oxydibenzoato)dilead(II)]

2014 ◽  
Vol 70 (12) ◽  
pp. 1105-1108
Author(s):  
Xiao-Juan Xu
Keyword(s):  
Coordination Polymer ◽  
Room Temperature ◽  
Fluorescence Emission ◽  
Aqua Ligand ◽  
Two Dimensional ◽  
Asymmetric Unit ◽  
X Ray Diffraction ◽  
Strong Fluorescence ◽  
X Ray ◽  
Point Symbol

In a new two-dimensional coordination polymer, [Pb(C14H8O5)(H2O)]n, the asymmetric unit consists of a PbIIcation, two halves of two crystallographically distinct fully deprotonated 4,4′-oxydibenzoate ligands and one aqua ligand. Single-crystal X-ray diffraction analysis reveals that the compound is a coordination polymer with the point symbol {53}2{54.82}. In addition, it exhibits a strong fluorescence emission in the solid state at room temperature.

Synthesis, structural characterization, and fluorescence of a Cd(II) coordination polymer with N-donor ligands

2017 ◽  
Vol 72 (3) ◽  
pp. 189-192 ◽  
Author(s):  
Hai-Wei Kuai ◽  
Jing-Jing Xia ◽  
Xiao-Hong Zhu ◽  
Jing Chen
Keyword(s):  
Ir Spectroscopy ◽  
Coordination Polymer ◽  
Structural Characterization ◽  
Hydrothermal Reaction ◽  
Ammonium Hydroxide ◽  
Donor Ligands ◽  
X Ray Diffraction ◽  
Monoclinic System ◽  
X Ray ◽  
2D Network

Abstract The hydrothermal reaction of CdSO4 with 2,5-di(1H-imidazol-4-yl)thiophene (L) in the presence of ammonium hydroxide at 100°C gives rise to a new complex [Cd(L)(SO4)]n (1). Complex 1 has been characterized by single-crystal X-ray diffraction, IR spectroscopy, and elemental and thermogravimetric analyses. It crystallizes in the monoclinic system with the space group C2/c and shows a 2D network structure. Complex 1 can emit fluorescence.

Nitroaromatic-detecting cadmium cyclohexyldicarboxylate coordination polymers with bis(4-pyridylmethyl)piperazine coligands and unprecedented 2D and 3D topologies

CrystEngComm ◽  
2018 ◽  
Vol 20 (38) ◽  
pp. 5677-5687 ◽  
Author(s):  
Andrew R. LaDuca ◽  
Robert L. LaDuca
Keyword(s):  
Coordination Polymer ◽  
Single Crystal ◽  
Coordination Polymers ◽  
Hydrothermal Reaction ◽  
Cadmium Nitrate ◽  
X Ray Diffraction ◽  
X Ray ◽  
2D And 3D

Hydrothermal reaction of cadmium nitrate, bis(4-pyridylmethyl)piperazine (4-bpmp), and a variety of cyclohexyldicarboxylate ligands generated three new coordination polymer solids that were structurally characterized via single-crystal X-ray diffraction.

A cobalt(II) coordination polymer constructed with the 2-carboxy-phenoxyacetate linker showing a corrugated layer structure: synthesis, structure analysis and magnetic properties

2020 ◽  
Vol 75 (6-7) ◽  
pp. 577-581 ◽  
Author(s):  
Zhong-Xiang Du ◽  
Jun-Xia Li
Keyword(s):  
Coordination Polymer ◽  
Potassium Hydroxide ◽  
Hydrothermal Reaction ◽  
Layer Structure ◽  
Variable Temperature ◽  
Antiferromagnetic Coupling ◽  
Phenoxyacetic Acid ◽  
Magnetic Susceptibility Data ◽  
Susceptibility Data ◽  
Structure Synthesis

AbstractA new binary CoII coordination polymer, [Co(2-cpa)2(H2O)]n (1) has been synthesized by a hydrothermal reaction of cobalt(II) acetate tetrahydrate and 2-carboxy-phenoxyacetic acid (2-H2cpa) in the presence of potassium hydroxide. Structural analysis revealed that the central CoII ion is in an octahedral geometry coordinated with one aqua and five oxygen atoms of three 2-carboxy-phenoxyacetate (2-cpa) ligands. The 2-cpa anions function as pentadentate double bridging chelate-μ3 linkers binding neighboring CoII ions together, to form an unusual corrugated (4,4)-connected layer. Variable-temperature magnetic susceptibility data in the 2–300 K temperature range indicates a weak antiferromagnetic coupling between adjacent cobalt(II) ions.

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