Interpenetrated Coordination Polymer Research Articles

Statement of Retraction: A two-fold interpenetrating coordination polymer: protective effect in the acute glomerulonephritis treatment by reducing tlr4 and nf-κb gene expression

Statement of Retraction: A two-fold interpenetrating coordination polymer: protective effect in the acute glomerulonephritis treatment by reducing tlr4 and nf-κb gene expression

A single-crystal to single-crystal transition from a 7-fold interpenetrated coordination polymer to a non-interpenetrated one by photochemical [2 + 2] polymerization and their sensing properties.

Two complexes, namely [Zn(bpeb)(sda)] (1) and [Zn(poly-bpeb)(sda)] (2), were synthesized by an organic ligand with an extensively conjugated system, bpeb = 1,4-bis[2-(3-pyridyl) vinyl]-benzene, H2sda = sulfonyldibenzoic acid and d10 metal centers Zn2+. Structural analysis revealed that compound 1 was nonporous and possessed 7-fold interpenetrated three-dimensional (3D) frameworks constructed from one-dimensional (1D) Zn-bpeb and Zn-sda chains. Interestingly, due to the short distance between the vinyl groups from two neighboring bpeb ligands, compound 1 could undergo a photochemical [2 + 2] polymerization reaction to generate 2 in a single-crystal to single-crystal (SCSC) manner under the irritation of UV. Moreover, the organic polymer in 2 could be depolymerized by heating to realize the reversible transformation from 2 to 1. Furthermore, both compounds 1 and 2 could be used as fluorescent sensors for 2,4,6-trinitrophenol (TNP) with high selectivity and sensitivity.

A two-fold interpenetrating coordination polymer: protective effect in the acute glomerulonephritis treatment by reducing tlr4 and nf-κb gene expression

By using a mixed-ligand approach, a new Co(II)-based coordination polymer (CP) with the chemical formula of {[Co2(BIP)2(L)]·2H2O} n (1) (H4L = 5,5′-(triazole-2,5-diyl)diisophthalic acid, BIP = 4,4′-bis(imidazol-1-yl)phenyl) has been synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction, IR spectroscopic, elemental and thermogravimetric analyses. To explore the activity of complex 1 on the treatment of acute glomerulonephritis (AGN), the mice model was constructed first. Then, the mice were given complex 1 for treatment and the level of 24-h urine protein contents was evaluated. Next, the RT-PCR was performed to detect the relative expression of important inflammatory factors for revealing the related mechanism.

Synthesis and structural characterization of a three-dimensional two-fold interpenetrated coordination polymer constructed from bis(4-(1H-imidazol-1-yl)phenyl)methanone and 1,1ʹ-biphenyl-2,2ʹ-dicarboxylate ligands for cadmium(II)

Abstract A three-dimensional (3D) two-fold interpenetrated coordination polymer, {[Cd(bipmo)(bpda)]·1.25(H2O)} n (1), (bipmo = bis(4-(1H-imidazol-1-yl)phenyl)methanone, H2bpda = 1,1ʹ-biphenyl-2,2ʹ-dicarboxylic acid), was synthesized by a solvothermal method. It has been characterized by elemental analyses, infrared (IR) spectroscopy, and single-crystal X-ray diffraction. The topological structure of 1 consists of uninodal dia nets with two-fold penetration. The thermal stability and the luminescence properties of complex 1 were investigated.

Temperature-Dependent Supramolecular Isomeric Zn(II)-Metal–Organic Frameworks and Their Guest Exchange

A pair of three-dimensional metal–organic framework supramolecular isomers (1a and 2a) prepared from the solvothermal reactions of Zn(NO3)2·4H2O, 1,4-bis(4-pyridyl)piperazine (bpp), and 4,4′-oxybis(benzoic acid) (H2obc) in different temperatures was structurally elucidated, and a series of guest exchanges on these isomers were performed without the loss of single crystallinity. At 110 and 130 °C in DMF/H2O, an 8-fold [4 + 4] interpenetrated coordination polymer {[Zn(bpp)(obc)]·3H2O}n (1a) with sra topology and a self-penetrated coordination polymer {[Zn3(bpp)3(obc)3]·2DMF·4H2O}n (2a) with a new topology were isolated, respectively. In the guest-exchange experiments, water molecules in isomer 1a were displaced by acetone and ethylene glycol molecules, while dimethylformamide molecules in isomer 2a were replaced by acetone and ethylene glycol as well as bulkier diethylene glycol due to its larger void. Photoluminescence properties of two isomers and their guest-exchanged products were also measured and discussed.

Constructing an Interpenetrated NiII-Based Coordination Polymer Based on a Flexible Dicarboxylate Ligand and an N-Donor Ligand: Preparation, Topological Diversity, and Catalytic Properties

A novel coordination polymer (CP) was constructed using 1,3-bis(4-carboxyphenoxy) propane (H2bcp), 1,4-bis(1-imidazol-yl)-2,5-dimethyl benzene (bimb), and NiII ions. [Ni(bcp)(bimb)]·H2O]n (1) shows an interesting 2D+2D → 3D inclined polyrotaxane topology. The structure was characterised by many methods. This work indicates that the flexible and neutral pyridine ligand plays a significant role in constructing CPs. Furthermore, 1 is a highly efficient catalyst for the reaction of CO2 and epoxides.

Selective fluorescence sensing properties of a novel two-fold interpenetrating coordination polymer

One novel 3D interpenetrated Zn(ii) CP acts as multi-functional chemosensors in detection of acetone, Fe3+, Cu2+, Cr2O72−, CrO42−and nitrofurantoin (NFT).

Two Interpenetrated Zn(II) Coordination Polymers: Synthesis, Topological Structures, and Property

Two interpenetrated coordination polymers (CPs) {[Zn1(L)(NO2pbda)]n[Zn2(L)(NO2pbda)]n} (1) and [Zn(L)(Brpbda)]n (2) were prepared by reactions of zinc sulfate heptahydrate with N-donor ligands of 1,4-di(1H-imidazol-4-yl)benzene (L) and auxiliary carboxylic acids of nitroterephthalic acid (H2NO2pbda) and 2,5-dibromoterephthalic acid (H2Brpbda), respectively. The structures of the CPs were characterized by Fourier-Transform Infrared (IR) spectroscopy, elemental analysis, and single-crystal X-ray diffraction. The coordination polymer 1 has two different (4, 4) sql 2D layer structures based on the [Zn(L)(NO2pbda)] moiety, which results in inclined interpenetration with a 2D + 2D → 3D architecture, while the CP 2 exhibits a 3-fold interpenetrating dmp network. The diffuse reflectance spectra are also investigated for the CPs 1 and 2.

Synthesis, structural diversity, and thermal decomposition kinetics of four interpenetrating Zn(II)/Cd(II)/Ni(II) coordination polymers

Four interpenetrating coordination polymers, namely, [Zn(bib)0.5(2,6-ndc)]n (1), {[Cd(bib)(2,6-ndc)]·2H2O}n (2), {[Cd2(bib)2(1,4-ndc)2]·H2O}n (3), [Ni2(bib)1.5(1,4-ndc)2(H2O)]n (4), (bib = 1,4-bis(2-methyl-imidazol-1-yl)butane, 1,4-H2ndc = Naphthalene-1,4-dicarboxylic acid, 2,6-H2ndc = Naphthalene-2,6-dicarboxylic acid) have been synthesized under solvothermal conditions. Their structures were characterized by elemental analysis, IR spectra, single-crystal and powder X-ray diffractions. Structural analyses reveal that compound 1 exhibits a 3-fold interpenetrating 3D net with pcu topology. Compound 2 presents a 5-fold interpenetrating 3D dia framework. Compound 3 displays an unusual [2 + 2] 4-fold interpenetrating 3D dia framework. Compound 4 features a 2-fold interpenetrating 3D framework. Simultaneous TG-DSC techniques were applied to assess the thermal decomposition behavior of compounds 1–4. TG measurements indicate that compounds show higher stability as the interpenetrating number increase. The thermal analysis kinetic parameters (apparent activation energy E and the pre-exponential factor A) of skeleton collapse for the compounds 1–4 were calculated by the methods of Kissinger and Ozawa-Doyle. The thermodynamic parameters (ΔH≠, ΔG≠, and ΔS≠) at peak temperatures were also calculated.

A multifunctional four-fold interpenetrated coordination polymer: Quantifiable evaluation of luminescent sensing for Cr(VI)/Cu(II) and photocatalytic properties

A four-fold interpenetrated coordination polymer {[Zn2(L)(bibp)3]·DMF·H2O}n (1) (H4L = 5,5′-(biphenyl-4,4′-diylbis(methylene)) bis(oxy) diisophthalicacid, bibp = 4,4′-bis(imidazolyl)biphenyl) has been rationally constructed, successfully solvothermally synthesized. Complex 1 was characterized by single-crystal X-ray diffraction, elemental analysis, IR spectra, powder X-ray diffraction (PXRD), and thermogravimetric (TG) analysis, and it shows a 3D four-fold interpenetrated bbf-topological framework. Luminescence studies demonstrate that 1 has high selectivity and sensitivity for pollutant Cr(VI) (CrO42− and Cr2O72−) anion and Cu(II) cation; Photocatalytic studies show that 1 exhibits great degradation activity of four organic dyes (methylene blue (MB), Rhodamine B (RhB), Methyl orange (MO) and Orange IV (OIV)). Meanwhile, the possible mechanism of the photocatalytic property has been deduced.

Three interpenetrating coordination polymers with 3D honeycomb networks derived from versatile ligand: 4'-(4-pyridyl)-4,2':6′,4″-terpyridine

Three interpenetrating Co(II)/Ni(II) coordination polymers, [Co(pytpy)(sfdb)]n (1), [Co2(pytpy)(sfdb)2]n (2) and [Ni(pytpy)(sfdb)]n·nH2O (3) (pytpy = 4'-(4-pyridyl)-4,2':6′,4″-terpyridine, H2sfdb = 4,4′-sulfonyldibenzoic acid) have been hydrothermally synthesized and structurally characterized. They all feature interpenetrating 3D honeycomb networks. Compound 1 is a 4-fold 3D polymeric structure, bidentate-bridging pytpy ligands join the square wave-like chains based on Co(II) centers and μ2-sfdb2- linkers to form the final 3D honeycomb network. Compound 2 is also a 3D honeycomb structure, which features 2-fold interpenetrating structure with unusual paddle-wheel secondary building units (SBUs). The topological net of compound 3 is identical to 1, but the central metal and its coordination environment are different from those of compound 1. In addition, diffuse reflectance UV–vis spectroscopic measurements and thermal gravimetry analyses have been used to characterize these compounds.

A multifunctional three-fold interpenetrated coordination polymer showing excellent luminescent sensing for Cr(VI)/ Fe(III) and photocatalytic properties

A three-fold interpenetrated coordination polymer [Cd2(L)(bibp)3]n (1) (H4L = 5,5′-(1,4-phenylenebis(methoxy))diisophthalic acid, bibp = 4,4'-bis(imidazolyl)biphenyl) has been rationally constructed, successfully solvothermally synthesized and fully characterized. Complex 1 shows a 3D three-fold interpenetrated novel topological framework with the point symbol (4. 69)2(42. 62. 7. 8), and represents a variety of potential applications. Luminescence studies demonstrate that 1 has high selectivity and sensitivity for pollutant Cr(VI) (CrO42- and Cr2O72-) anion and Fe(III) cation; Photocatalytic studies show that 1 exhibits great degradation activity of three organic dyes (methylene blue (MB), Rhodamine B (RhB) and MalachiteGreen oxalate (MGO)). Furthermore, the possible mechanisms of the luminescent quench and photocatalytic properties have been deduced.

Anion-dependent interpenetration in lattices of Ag(I) complexes of a divergent quaterpyridine-donor ligand

Crystal structure determinations for the divergent quaterpyridine-type ligand bis-1,4-(di-4-pyridylaminomethyl)benzene, dpab, and its complexes with silver(I) trifluoroacetate and nitrate have revealed the operation of different weak interactions within the lattices. Coordination of four pyridyl-N donors to Ag(I) in the trifluoroacetate results in a 3-dimensional coordination polymer with the uncoordinated anions held within the cavities created by that polymer. In the nitrate, only two pyridyl-N donors are bound to each of the two inequivalent Ag(I) centres and the lattice contains two interpenetrating coordination polymers linked by CH⋯O interactions involving the coordinated anions.

Flexible Porous Coordination Polymers from Divergent Photoluminescent 4-Oxo-1,8-naphthalimide Ligands.

Two new luminescent ditopic naphthalimide-derived ligands, N-(4-cyanophenylmethylene)-4-(4-cyanophenoxy)-1,8-naphthalimide (L3) and N-(4-carboxyphenylmethylene)-4-(4-carboxyphenoxy)-1,8-naphthalimide (H2L4), have been prepared, and their coordination chemistry has been explored in the synthesis of three new coordination polymer materials. Complex poly-[Ag(L3)2]BF4·4.5H2O·0.5THF (1) is a 3-fold 2D → 2D parallel interpenetrated coordination polymer in which three interwoven sheets define inter- and intralayer channels containing anions and solvent molecules. Molecules of L3 interact in 1 through dominant head-to-head π-π stacking interactions, in an opposite aggregation mode to that observed in the free ligand in the crystalline phase. Complexes poly-[Cu(L4)(OH2)]·2DMF·0.5H2O (2) and poly-[Cd2(L4)2(OH2)2]·1.5DMF·3H2O (3) are related noninterpenetrated two-dimensional coordination polymers defined by one-dimensional metal-carboxylate chains, forming layers that interdigitate with adjacent networks through naphthalimide π-π interactions. Both materials undergo structural rearrangements on solvent exchange with acetonitrile; in the case of 3, this transformation can be followed by single-crystal X-ray diffraction, revealing the structure of the acetonitrile solvate poly-[Cd2(OH2)2(L4)2]·2MeCN (4), which shows a significant compression of the primary channels to accommodate the solvent guest molecules. Both materials display modest CO2 adsorption after complete evacuation, and the original expanded phases can be regenerated by reimmersion in DMF. The photophysical properties of each ligand and complex were also explored, which revealed variations in emission wavelength, based on solid-state interactions, including a notable shift in the fluorescence emission band of 3 upon structural rearrangement to 4.

Interconvertible structural transformations between two Zn(II) interpenetrating coordination polymers

Two distinct Zn(II) coordination polymers (CPs) have been prepared based on Zn(NO3)2 and 4-(2-ethyl-1H-imidazol-1-yl)benzoic acid (2-Heiba) via different synthetic approaches, solvothermal synthesis and layer diffusion, respectively. Upon solvothermal condition, a 2D undulated CP [Zn2(2-eiba)3(OH)]n (1) can be obtained, which incorporates the polythreading structural motifs and then results in the 3-fold pcu topological network with the aid of interlayer OH⋯N hydrogen bonds. Employment of layer diffusion method affords another 3D CP {[Zn(2-eiba)2](H2O)3}n (2), featuring a dia topological network in 2+2→4-fold interpenetrating pattern. Interestingly, interconvertible structural transformations between 1 and 2 can be achieved by immersing in CH3OH-H2O solution under stirring or solvothermal conditions, respectively. In addition, thermal stability and fluorescence properties of these complexes have also been studied.

Syntheses, structures and magnetism of four Ni(II)/Co(II) interpenetrating coordination polymers based on 1,4-bis(4-(imidazole-1-yl)benzyl)piperazine

Four novel interpenetrating coordination polymers have been hydrothermally synthesized based on a long flexible N-donor ligand (bibp) and different polycarboxylates, namely [Ni(1,3-bdc)(bibp)(H2O)]·0.5H2O (1), [Ni(btec)0.5(bibp)1.5]·H2O (2), [Co(btec)0.5(bibp)1.5]·H2O (3) and [Co(oba)(bibp)]·2H2O (4) (bibp=1,4-bis(4-(imidazole-1-yl)benzyl)piperazine, 1,3-bdc=1,3-benzenedicarboxylate, btec=1,2,4,5-benzenetetracarboxylate, oba=4,4′-oxybisbenzoate). Their structures were determined by single-crystal X-ray diffraction analyses and further characterized by elemental analyses, IR spectra and TG analyses. Compound 1 shows a 2-fold interpenetrating 3D framework with CdSO4 topology. Compounds 2 and 3 exhibit 2-fold interpenetrating pcu frameworks. Compound 4 is a 2D→3D interdigitated network formed from 2D→2D threefold interpenetrating motifs. In addition, the magnetic properties of compounds 1–4 have also been investigated in the temperature range 2–300K.

1D lead(II) coordination chains with carboxylate containing ligands. A rare example of polyrotaxane 1D → 1D interpenetrated coordination polymer

The structural determination of two interesting lead(II) coordination polymers, namely [Pb(ind)2(H2O)]n (1) and [Pb2(dbsf)2(bipy)]n (2) (Hind=indane-2-carboxylic acid, H2dbsf=4,4′-sulfonyldibenzoic acid, and bipy 4,4′-bipyridine), reveals in the second an unexpected polyrotaxane 1D→1D interpenetrated coordination polymer thanks to the hemidirected coordination geometry of the metal and the rings formed by the dicarboxybiphenyl sulfone ligands along the 1D chain.

A Series of Zinc(II) 3D → 3D Interpenetrated Coordination Polymers Based On Thiophene-2,5-dicarboxylate and Bis(Imidazole) Derivative Linkers

Six coordination polymers of Zn(II) ions and three organic linkers namely, [Zn(μ4-tdc)(μ-bmeib)0.5]n (1), [Zn(μ4-tdc)(μ-betib)0.5]n (2), [Zn(μ4-tdc)(μ-bisopib)0.5]n (3), [Zn(μ4-tdc)(μ-pbmeix)0.5]n (4), [Zn(μ4-tdc)(μ-pbetix)0.5]n (5), [Zn(μ4-tdc)(μ-pbisopix)0.5]n (6), bisopib, pbetix, and pbisopix, where H2tdc = thiophene-2,5-dicarboxylic acid, bmeib = 1,4-bis(2-methyl-1H-imidazol-1-yl)butane, betib = 1,4-bis(2-ethyl-1H-imidazol-1-yl)butane, bisopib = 1,4-bis(2-isopropyl-1H-imidazol-1-yl)butane, pbmeix = 1,4-bis((2-methyl-1H-imidazol-1-yl)methyl)benzene, pbetix = 1,4-bis((2-ethyl-1H-imidazol-1-yl)methyl)benzene, pbisopix = 1,4-bis((2-isopropyl-1H-imidazol-1-yl)methyl)benzene, have been synthesized and structurally characterized by elemental analysis, IR spectra, NMR spectra and single-crystal and powder X-ray diffractions. Compounds 1–6 are isostructural and display a 3D cubic structure with 2-fold interpenetrated nets. Two crystallographically independent Zn(II) ions are bridged by four different thiopehe...

Syntheses, structures and properties of three 4-fold interpenetration coordination polymers based on two different dia interpenetrating modes

Three new 4-fold interpenetrated coordination polymers based on two different dia interpenetrating modes have been prepared successfully, namely [Cu0.5(bib)0.5(tftpa)0.5]n (1), {[Zn0.5(bib)0.5(tftpa)0.5]·0.5H2O}n (2) and [Cd(bib)(tftpa)(EtOH)]n (3) (bib=1,4-bis(2-methyl-imidazol-1-yl)butane, H2tftpa=tetrafluoroterephthalic acid). Complexes 1 and 3, with the same octahedral metal center, are obtained as 4-fold interpenetrated dia coordination frameworks; however, complex 2, with a tetrahedral metal center, presents a 4-fold dia network with an uncommon [2+2] mode of interpenetration. All of the polymers contain right- and left-handed helices that are constructed alternatively and each helix is built up from [M2(tftpa)(bib)]n. Additionally, thermogravimetric curves and luminescent emissions of 2 and 3 have been studied.

Syntheses, Structures, Thermal and Luminescent Properties of Two Interpenetrating Coordination Polymers Constructed by 2,5‐Thiophenedicarboxylate and Different Dipyridyl Ligands

AbstractTwo coordination polymers with three‐dimensional (3D) architectures, formulated as {[Zn2(H2O)(2,5‐tdc)2(bpa)2]·H2O}n (1) and [Zn2(2,5‐tdc)2(dpbd)]n (2) [2,5‐H2tdc = 2,5‐thiophenedicarboxylic acid, bpa = 1,2‐bis(4‐pyridyl)‐ethane, and dpbd = 1,4‐bis(4‐pyridyl)‐1,3‐butadiene] were synthesized from the hydrothermal reactions of Zn(NO3)2·6H2O, 2,5‐H2tdc, and bpa or dpbd, respectively. The two complexes were characterized by IR, elemental analysis, powder X‐ray diffraction, and single‐crystal X‐ray diffraction. 1 exhibits a fivefold interpenetrating diamondoid framework with two types of 4‐connecting nodes. The structure of 2 shows a threefold interpenetrating pcu net. Thermal stability and photoluminescent properties of 1 and 2 were also investigated.