scholarly journals Self-Assembly of 1D Double-Chain and 3D Diamondoid Networks of Lanthanide Coordination Polymers through In Situ-Generated Ligands: High-Pressure CO2 Adsorption and Photoluminescence Properties

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4428
Author(s):  
Chatphorn Theppitak ◽  
Suwadee Jiajaroen ◽  
Nucharee Chongboriboon ◽  
Songwuit Chanthee ◽  
Filip Kielar ◽  
...  
Keyword(s):  
High Pressure ◽  
Coordination Polymers ◽  
Self Assembly ◽  
Chain Structure ◽  
Double Chain ◽  
Hydrothermal Conditions ◽  
3D Network ◽  
High Pressure Co2 ◽  
Secondary Building Units

Two new lanthanide-based coordination polymers, [Sm2(bzz)(ben)6(H2O)3]·0.5H2O (1) and [Eu(bbz)(ben)3] (2), were synthesized and characterized. The described products were formed from in situ-generated benzoate (ben) and N’-benzoylbenzohydrazide (bbz) ligands, which were the products of transformation of originally added benzhydrazide (bzz) under hydrothermal conditions. Compound 1 exhibits a one-dimensional (1D) double-chain structure built up from the connection of the central Sm3+ ions with a mixture of bzz and ben ligands. On the other hand, 2 features a 3D network with a 4-connected (66) dia topology constructed from dinuclear [Eu2(ben)6] secondary building units and bbz linkers. High-pressure CO2 sorption studies of activated 1 show that maximum uptake increases to exceptionally high values of 376.7 cm3 g−1 (42.5 wt%) under a pressure of 50 bar at 298 K with good recyclability. Meanwhile, 2 shows a typical red emission in the solid state at room temperature with the decay lifetime of 1.2 ms.

Syntheses, structures, and magnetic properties of two unique Cu(ii)-based coordination polymers involving a crystal-to-crystal structural transformation from a 1D chain to a 3D network

2017 ◽  
Vol 46 (48) ◽  
pp. 17025-17031 ◽  
Author(s):  
Xu-Feng Yang ◽  
Min Liu ◽  
Hai-Bin Zhu ◽  
Cheng Hang ◽  
Yue Zhao
Keyword(s):  
Magnetic Properties ◽  
Structural Transformation ◽  
Coordination Polymers ◽  
Network Structure ◽  
Chain Structure ◽  
3D Network ◽  
1D Chain ◽  
Crystal Structural

Promoted by the DMF solvent, the 1D chain structure of 1 can be irreversibly transformed into the 3D sod network structure of 2 in a crystal-to-crystal fashion, which is accompanied by a drastic magnetic change.

scholarly journals From a Well-Defined Organozinc Precursor to Diverse Luminescent Coordination Polymers Based on Zn(II)-Quinolinate Building Units Interconnected by Mixed Ligand Systems

Molecules ◽  
2021 ◽  
Vol 26 (23) ◽  
pp. 7402
Author(s):  
Katarzyna Sołtys-Brzostek ◽  
Kamil Sokołowski ◽  
Iwona Justyniak ◽  
Michał K. Leszczyński ◽  
Natalia Olejnik-Fehér ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Coordination Polymers ◽  
Self Assembly ◽  
Rational Design ◽  
Building Blocks ◽  
Mixed Ligand ◽  
Direct Reaction ◽  
Synthetic Strategy ◽  
Secondary Building Units ◽  
Additional Base

Introduction of photoactive building blocks into mixed-ligand coordination polymers appears to be a promising way to produce new advanced luminescent materials. However, rational design and self-assembly of the multi-component supramolecular systems is challenging from both a conceptual and synthetic perspective. Here, we report exploratory studies that investigate the potential of [Zn(q)2]2[tBuZn(OH)]2 complex (q = deprotonated 8-hydroxyquinoline) as an organozinc precursor as well as a mixed-ligand synthetic strategy for the preparation of new luminescent coordination polymers (CPs). As a result we present three new 2D mixed-ligand Zn(II)-quinolinate coordination polymers which are based on various zinc quinolinate secondary building units interconnected by two different organic linker types, i.e., deprotonated 4,4′-oxybisbenzoic acid (H2obc) as a flexible dicarboxylate linker and/or selected bipyridines (bipy). Remarkably, using the title organozinc precursors in a combination with H2obc and 4,4′-bipyridine, a novel molecular zinc quinolinate building unit, [Zn4(q)6(bipy)2(obc)2], was obtained which self-assembled into a chain-type hydrogen-bonded network. The application of the organometallic precursor allowed for its direct reaction with the selected ligands at ambient temperature, avoiding the use of both solvothermal conditions and additional base reagents. In turn, the reaction involving Zn(NO3)2, as a classical inorganic precursor, in a combination with H2obc and bipy led to a novel 1D coordination polymer [Zn2(q)2(NO3)2(bipy)]. While the presence of H2obc was essential for the formation of this coordination polymer, this ditopic linker was not incorporated into the isolated product, which indicates its templating behavior. The reported compounds were characterized by single-crystal and powder X-ray diffraction, elemental analysis as well as UV-Vis and photoluminescence spectroscopy.

Self-assembly of [Cu3I2]- or [CuI]n-based (n = 2, 4, and ∞) coordination polymers from unsymmetrical bis(pyridyl) and in situ ligands: syntheses, structures, and properties

CrystEngComm ◽  
2014 ◽  
Vol 16 (3) ◽  
pp. 359-368 ◽  
Author(s):  
Zhu-Yan Zhang ◽  
Zhao-Peng Deng ◽  
Xian-Fa Zhang ◽  
Li-Hua Huo ◽  
Hui Zhao ◽  
...  
Keyword(s):  
Coordination Polymers ◽  
Self Assembly ◽  
Structures And Properties

Zinc and cadmium metal-directed coordination polymers: in situ flexible tetrazole ligand synthesis, structures, and properties

CrystEngComm ◽  
2015 ◽  
Vol 17 (30) ◽  
pp. 5814-5831 ◽  
Author(s):  
Ruo Ting Dong ◽  
Zhao Ying Ma ◽  
Li Xin Chen ◽  
Lan Fen Huang ◽  
Qian Hong Li ◽  
...  
Keyword(s):  
Coordination Polymers ◽  
Hydrothermal Conditions ◽  
Structures And Properties ◽  
Cadmium Metal ◽  
Ligand Synthesis ◽  
Coordination Frameworks

Seven zinc and cadmium coordination frameworks were obtained through in situ tetrazole synthesis. By varying the hydrothermal conditions the unprecedented generation of tetrazole ligands were achieved.

A 3D supramolecular architecture based on 2,2′-oxybis(benzoic acid) and trans-1,2-bis(4-pyridyl)ethylene as ligands for Co(II)

2017 ◽  
Vol 72 (6) ◽  
pp. 397-401 ◽  
Author(s):  
Long Tang ◽  
Juan Zhang ◽  
Xiao-Xia Liu ◽  
Ji-Jiang Wang ◽  
Feng Fu
Keyword(s):  
Hydrogen Bonds ◽  
Benzoic Acid ◽  
Chain Structure ◽  
Polymeric Chain ◽  
Supramolecular Architecture ◽  
X Ray Diffraction ◽  
Double Chain ◽  
Hydrothermal Conditions ◽  
X Ray ◽  
Mixed Ligands

AbstractThe reaction of CoCl2·6H2O with mixed ligands of 2,2′-oxybis(benzoic acid) (2,2′-H2oba) and trans-1,2-bis(4-pyridyl)ethylene (bpe) under hydrothermal conditions produced a new 3D cobalt(II) supramolecular architecture {[Co(oba)(bpe)(H2O)]·1/2bpe}n (1), which was structurally characterized by elemental analysis, infrared spectroscopy, thermogravimetric analyses, and single-crystal X-ray diffraction. The results show that the Co(II) ions are connected to form an infinite polymeric chain by bpe ligands in complex 1. Due to strong intermolecular O–H···O hydrogen bonds, the adjacent chains are connected to generate a double-chain structure. These double chains are joined by O–H···N hydrogen bonding to produce a 2D supramolecular architecture. Furthermore, through intermolecular C–H···O hydrogen bonds, the layers are linked into a 3D supramolecular structure. Magnetic susceptibility measurements have indicated that complex 1 shows weak antiferromagnetic interactions between adjacent Co(II) ions.

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.

scholarly journals Varying the Dimensionality of Cu(II)-Based Coordination Polymers Through Solvent Influence

Crystals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 893 ◽  
Author(s):  
Irina A. Kühne ◽  
Anthony B. Carter ◽  
George E. Kostakis ◽  
Christopher E. Anson ◽  
Annie K. Powell
Keyword(s):  
Hydrogen Bonding ◽  
Coordination Polymers ◽  
Energy Minimization ◽  
Double Helix ◽  
Controlled Synthesis ◽  
Solvent Influence ◽  
3D Network ◽  
In Situ Formation ◽  
Solvent Layer

This work reports the synthesis and structure of a large porous zeotype network observed within compound (1) using {Cu2(piv)4} as the linking unit (piv = pivalate). The slow in situ formation of the hmt ligand (hexamethylenetetramine) appears to be key in generating a µ4-bridging mode of the hmt-node. Attempts to improve the low yield of compound (1) using different solvent layer diffusion methods resulted in the µ3-hmt complexes (2) and (3). Both compounds exhibit a 3D network of two intertwined chiral networks. Strong hydrogen bonding present in (3) leads to the formation of intertwined, DNA-like double-helix structures. The use of bulky solvents in the synthesis of compound (4) leads to the structure crystallizing solvent-free. The packing of (4) is dominated by energy minimization, which is achieved when the 1D-“cylinders” pack into the closest possible arrangement. This work highlights the potential for solvent controlled synthesis of extended copper-hmt systems.

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