Showing papers on "Coordination polymer published in 2023"
TL;DR: In this paper , a mixed-ligand copper-II coordination polymer with different structures of mixed salamo-type ligands was constructed for the first time, and the antimicrobial activities of both ligands and Cu(II)-CP were investigated and found to exhibit excellent antibacterial activities.
8 citations
TL;DR: In this paper , a tailored luminescent probe, namely [Ni(L)(4,4-bipy)]n (Ni(II)-CP, was prepared and determined through single crystal X-ray diffraction experiment.
5 citations
5 citations
TL;DR: In this article , it was shown that depolymerization probably leads to a complex that is formed with the octahedral structure of the copper-halide core, which can be considered a sensor or detector for the overheating of processes that should be maintained at temperatures below 138 °C.
Abstract: Tertiary diethylpyridylphosphine was synthesized by the reaction of pyridylphosphine with bromoethane in a suberbasic medium. The reaction of phosphine with the copper(I) iodide led to the formation of a copper(I) coordination polymer, which, according to the X-ray diffraction data, has an intermediate structure with a copper-halide core between the octahedral and stairstep geometries of the Cu4I4 clusters. The obtained coordination polymer exhibits a green emission in the solid state, which is caused by the 3(M+X)LCT transitions. The heating up of the copper(I) coordination polymer to 138.5 °C results in its monomerization and the formation of a new solid-state phase. The new phase exhibits a red emission, with the emission band maximum at 725 nm. According to the experimental data and quantum chemical computations, it was concluded that depolymerization probably leads to a complex that is formed with the octahedral structure of the copper-halide core. The resulting solid-state phase can be backward-converted to the polymer phase via recrystallization from the acetone or DMF. Therefore, the obtained coordination polymer can be considered a sensor or detector for the overheating of processes that should be maintained at temperatures below 138 °C (e.g., engines, boiling liquids, solar heat systems, etc.).
3 citations
TL;DR: In this paper , a mechanically flexible one-dimensional coordination polymers exhibiting elastic bending is reported. But such polymers are rare, and they do not have the ability to bend.
Abstract: Coordination polymers exhibiting mechanical flexibility including elastic or plastic bending are rare. Here, we report an example of a mechanically flexible one-dimensional coordination polymer that shows elastic bending. Quantitative insights on the inter and intra-chain bonding as well as structural flexibility from a combination of techniques including variable temperature single crystal X-ray diffraction (XRD), high-pressure crystallography (ambient─15 GPa), synchrotron micro-XRD mapping of the bent crystal, and high-resolution synchrotron X-ray charge density analysis show that the helical coordination polymer behaves like a spring when subjected to external stimuli. Changes that occur with the variation of temperature, pressure, or bending, however, result in very different mechanistic changes. The exceptional coordination sphere flexibility rendered by the presence of Jahn–Teller distorted coordination bonds leads to the flexibility of the polymer.
3 citations
2 citations
TL;DR: In this article , three isostructural lanthanide coordination polymers (CPs) have been characterized by single crystal X-ray diffraction, Fourier transform infrared spectrum, elemental analysis, powder X ray diffraction and thermal gravimetric analysis.
1 citations
TL;DR: In this paper, a new iron (iii)-cyamelurate-based coordination polymer was reported to have high catalytic activity in both in basic and acid media, and the best observed catalytic activities were attributed to the increase in the binding sites of Fe3+ ions, in parallel with the increased exposure of the catalytic sites, leading to a higher atomic efficiency.
Abstract: We report on a new iron (iii)-cyamelurate-based coordination polymer. The new material based on a heptazine derivative was prepared in aqueous medium and characterized by a variety of techniques including TGA, FTIR, XRD, HRTEM, and STEM. Due to the high structural stability of the complex in aqueous media, its heterogeneous Fenton-like catalytic activity was evaluated using a model molecule. The results obtained showed a high catalytic activity in both in basic and acid media. The pseudo-first-order rate constants normalized by iron(III) concentrations was approximately 1000 times higher than the result obtained for traditional heterogeneous catalysts based on iron(III) oxyhydroxides. The best observed catalytic activities were attributed to the increase in the binding sites of Fe3+ ions, in parallel with the increased exposure of the catalytic sites, leading to a higher atomic efficiency of the reaction.
1 citations
TL;DR: In this article , the reaction of the flexible polydentate ligand octakis(3-pyridyloxy)cyclotetraphosphazene (O3PyCP) with AgNO3 afforded a new coordination polymer, [Ag2(O3PolyCP)](NO3)2]n (1), characterized by single-crystal X-ray crystallography and infrared spectroscopy.
1 citations
TL;DR: In this article , the crystal structures of the cyanide complexes have been determined by the single crystal x-ray diffraction (SC-XRD) patterns, and the intermolecular C N∙∙ ∙π interaction between cyanide ligand and pyridine ring of the 4aepy ligand is the most striking feature of complex 1 .
1 citations
TL;DR: In this paper , two lanthanide-coordination polymers (Ln-CPs) containing benzophenone-4,4´-dicarboxylate (bpndc2-) linker were synthesized and characterized using X-ray crystallography and spectroscopic methods.
Abstract: Two lanthanide-coordination polymers (Ln-CPs) containing benzophenone-4,4´-dicarboxylate (bpndc2-) linker, namely [Er2(bpndc)3(DMF)2] (1) and [Yb2(bpndc)3(DMF)2] (2) were synthesized and characterized using X-ray crystallography and spectroscopic methods. The topological analysis revealed that both...
TL;DR: In this paper , an in situ generated P-S ligand (dppmtH) was synthesized from the solvothermal reaction of Au(tht)Cl, AgCl, and dpppyatc in CH3CN/CH2Cl2 and showed a rapid, selective, reversible, and visible vapor-chromic response on exposure to methanol (MeOH) vapor with its emission shifting to a more intense green (530 nm, λex = 388 nm) with 46.8% and τ = 1.24 μs (λex = 375 nm).
Abstract: A heterobimetallic coordination polymer [Au4(dppmt)4(AgCl)2]n (1) incorporating an in situ generated P-S ligand (dppmtH) was synthesized from the solvothermal reaction of Au(tht)Cl, AgCl, and dpppyatc in CH3CN/CH2Cl2 (dppmtH = (diphenylphosphino)methanethiol, tht = tetrahydrothiophene, dpppyatc = N,N-bis((diphenylphosphaneyl)methyl)-N-(pyridin-2-yl)-amino-thiocarbamide). The structure of 1 contains a one-dimensional helical Au-Au chain in which the unique [Au4Ag2S2] cluster units are connected by [Au2(dppmt)2] dimers. Upon excitation at 343 nm, 1 exhibited cyan (495 nm) phosphorescent emission at quantum yield (QY) = 22.3% and τ = 0.78 μs (λex = 375 nm). Coordination polymer 1 exhibited a rapid, selective, reversible, and visible vapor-chromic response on exposure to methanol (MeOH) vapor with its emission shifting to a more intense green (530 nm, λex = 388 nm) with QY = 46.8% and τ = 1.24 μs (λex = 375 nm). A polymethylmethacrylate film containing 1 served as a reversible chemical sensor for the sensitive detection of MeOH in air.
TL;DR: A brief review of recent developments in this coordination chemistry involving oligozwitterion species, as reflected in solid state X-ray structural studies of the coordination polymers and frameworks formed and with a particular focus on uranyl ion systems, can be found in this article .
Abstract: Zwitterions may take many forms and have found many applications, some of which are based on their capacity to act as ligands for a wide variety of metal ions. This brief review describes recent developments in this coordination chemistry involving oligozwitterion species, as reflected in solid state X-ray structural studies of the coordination polymers and frameworks formed and with a particular focus on uranyl ion systems.
TL;DR: In this paper , the properties of N-donor ligands were characterized by elemental analyses, IR spectra, PXRD, thermogravimetry and X-ray structural analysis.
TL;DR: In this article , the reaction of diazotetracyanocyclopentadiene with copper powder in the presence of NEt4Cl yields, unexpectedly, besides the known NEt 4 salt of octacyanofulvalenediide (NEt4)2[C10(CN)8] (5), which can be transformed via reaction with AgNO3 to the corresponding Ag+ salt (4), which in turn can be reacted with KCl to yield the corresponding K+ salt 6.
Abstract: The reaction of diazotetracyanocyclopentadiene with copper powder in the presence of NEt4Cl yields, unexpectedly, besides the known NEt4[C5H(CN)4] (3), the NEt4 salt of octacyanofulvalenediide (NEt4)2[C10(CN)8] (5), which can be transformed via reaction with AgNO3 to the corresponding Ag+ salt (4), which in turn can be reacted with KCl to yield the corresponding K+ salt 6. The molecular and crystal structures of 4–6 could be determined, and show a significantly twisted aromatic dianion which uses all its nitrile groups for coordination to the metals; 4 and 6 form three-dimensional coordination polymers with fourfold coordinated Ag+ and eightfold coordinated K+ cations.
TL;DR: In this article , the conformationally flexible ditopic ligand 4,4′-diaminodiphenylethane and different metal salts (nitrates, sulfates, tetrafluoroborates and perchlorates) were obtained using mononuclear coordination complexes and coordination polymers.
Abstract: In this pioneering research, mononuclear coordination complexes and coordination polymers were obtained using the conformationally flexible ditopic ligand 4,4′-diaminodiphenylethane and different metal salts (nitrates, sulfates, tetrafluoroborates and perchlorates). Seven new products, including the mononuclear complexes [Cd(2,2′-bpy)3](ClO4)2](dadpe)(4,4′-bpy) (1), [Ni(dadpe)2(H2O)4](SO4).H2O (2), one-dimensional coordination polymers {[Zn(NO3)(dadpe)(dmf)2](NO3)}n (3), {[Cd(2,2′-bpy)2(dadpe)](ClO4)2}n (4), and two-dimensional coordination polymers, {[Cd(4,4′-bpy)2(H2O)2](ClO4)2(dadpe)(EtOH)2}n (5), {[Co(4,4′-bpy)2(H2O)2](BF4)2(dadpe)(EtOH)2}n (6) and {[Cd(adi)(dadpe)](H2adi)}n (7), (dadpe=4,4′-diaminodiphenylethane, 2,2′-bpy=2,2′-bipyridine, 4,4′-bpy=4,4′-bipyridine, H2adi=adipic acid) were produced. The synthesized compounds were characterized by FTIR and single-crystal X-ray diffraction analyses. The dadpe was recorded as a neutral guest in the crystals of mononuclear complex 1 and in coordination polymers 5 and 6. In compound 2, two dadpe ligands coordinate in a monodentate mode and occupy two trans-positions in the [Ni(H2O)4(dadpe)2]2+ octahedral complex cation. Coordination polymers 3 and 4 represent single chains originating from dadpe as a bidentate linker in both. The H-donor’s possibilities of amino groups were utilized in the interconnection of coordination chains into H-bonded networks via NH(NH2)···O hydrogen bonds. The isostructural coordination polymers 5 and 6 comprise similar cationic square grids [M(4,4′-bpy)2(H2O)2]2+ [M=Cd (5), M=Co (6)], with sql topology balanced by the charge-compensated anions, while dadpe and EtOH as neutral guests are situated in the interlayer space. The neutral 2D coordination network in 7 with the sql topology originates from both adi and dadpe linkers as bidentate-bridging ligands, and the neutral H2adi is entrapped as a guest in crystal lattice. The impact of different types of intermolecular interactions was evaluated by Hirshfeld surface analysis.
TL;DR: In this paper , a new copper complex and two new copper coordination polymers were synthesized and transformed into metal organic frameworks (MOFs) and used as metalloligand.
TL;DR: In this paper , two 2D silver thiolate coordination polymers (CPs) were characterized and shown to exhibit a reversible 2D-to-1D structural transformation in the presence of an excess of thiol molecules.
Abstract: Silver nanoparticles are known and widely used for their antimicrobial activities. Nevertheless, once they are released into the natural or biological environments, they can become toxic with time, because of the dissolution of some Ag(I) ions that can then react with thiol-based molecules, such as glutathione and/or compete with copper proteins. These assumptions are based on the high affinity of the soft acid Ag(I) and the soft base thiolates and the exchange reactions that are involved in complex physiological media. Here we synthesized and fully characterized two new 2D silver thiolate coordination polymers (CPs) that exhibit a reversible 2D-to-1D structural transformation in the presence of an excess of thiol molecules. This dimensionality change induces also a switch of the yellow emission of the Ag-thiolate CP. This study highlights that these highly stable silver-thiolate CPs, in basic, acidic and oxidant media can undergo a complete dissolution-recrystallization mechanism upon thiol exchange reactions.
TL;DR: In this article , a new coordination polymer Zr-CIA was developed and employed as a stable and effective catalyst for the alkylation of amines with alcohols or benzyl amines.
Abstract:
A coordination polymer Zr-CIA was developed and employed as a stable and effective catalyst for the alkylation of amines with alcohols or benzyl amines. The Zr-CIA as a new coordination polymer was prepared from 1-(carboxymethyl)-1H-indole-3-carboxylic acid and ZrCl4 through a simple and effective solvothermal method and characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), powder X-ray diffraction (XRD), fourier transform infrared (FT-IR), nitrogen adsorption-desorption and X-ray photoelectronic spectroscopy (XPS). The polymer exhibited not only high catalytic activity for the alkylation reaction, but also good reusability in more than five cycles. Meanwhile, mechanistic investigations were carried out to study these reactions.
In summary, we reported a simple and effective method for the synthesis of a new Zr-containing coordination polymer, which was characterized by powder X-ray diffraction (XRD), X-ray photoelectronic spectroscopy (XPS), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and fourier transform infrared spectroscopy. This kind of coordination polymer Zr-CIA revealed good catalytic activity in the alkylation of amines with alcohols in high yields with good recovery cycle performance.
No.
TL;DR: In this article , two novel Zn(II) coordination polymers, {Zn(µ-HBCPT)(µ -1,3-BIP)]·2H2O·DMF}n (SNUT-7) and [Zn2 (µ3-BCPT))(HCOO)µµ −1, 3,5-bis(4′-carboxy-phenyl)-1,2,4-triazole and formate (HCOO−) ligands, were prepared under solvothermal conditions and characterized by single-crystal and powder X-ray diffraction, IR spectra, thermogravimetric analysis and elemental analysis.
TL;DR: In this article , a transition metal coordination polymer, [Zn(tpba)(bqdbc)0.5]n (1), was successfully designed and synthesized based on 2,2'-biquinoline-4,4'-dicarboxylic acid (H2bqdc) and 4-(2,2';6',2'-terpyridin)-4'-yl)benzoic acid(Htpba).
Abstract: A transition metal coordination polymer, [Zn(tpba)(bqdbc)0.5]n (1), was successfully designed and synthesized based on 2,2'-biquinoline-4,4'-dicarboxylic acid (H2bqdc) and 4-(2,2';6',2'-terpyridin)-4'-yl)benzoic acid (Htpba). Compound 1 is initially constructed from the 1D chain of tpba- and bqdc2- and further connected by π⋯π interactions, forming a 2D layered structure. Notably, compound 1 showed good fluorescence stability ranging from pH 1 to 13 in an aqueous solution. It was found that compound 1 could not only detect V2O74- ions with high selectivity and recyclability but also serve as an excellent selective sensing material for Fe3+ among some cations. More crucially, it is the first time that a luminescent coordination polymer has been used to detect V2O74- ions in aqueous solution. The detection of nitrotoluene (p-NT) demonstrated that compound 1 could also behave as a functional probe with high selectivity, sensitivity, and recyclability; and the detection limit of p-NT was 50.9 nM. Meanwhile, the luminescence sensing mechanisms for different analytes were speculated in detail.
TL;DR: A new 3D manganese(II) coordination polymer, formulated as [Mn3(HL)6] (1) (where H2L = 6-hydroxypicolinic acid), has been synthesized and characterized by single-crystal X-ray crystallographic analysis along with other spectroscopic and magnetic techniques as discussed by the authors .
Abstract: A new 3D manganese(II) coordination polymer, formulated as [Mn3(HL)6] (1) (where H2L = 6-hydroxypicolinic acid), has been hydrothermally synthesized and characterized by single-crystal X-ray crystallographic analysis along with other spectroscopic and magnetic techniques. Structural analysis shows that the compound crystallizes in the monoclinic C2/c space group and is a non-porous 3D coordination polymer formed by three different Mn(II) centres connected by 6-hydroxypicolinic acid ligands in their keto form. Each Mn(II) centre shows a distorted octahedral coordination environment. Neighbouring Mn(II) centres are connected by two different syn-anti bridging carboxylate groups to form regular coordination chains. There are two different [Mn2(RCOO)2] units along the chain, formed by two crystallographically independent Mn centres (Mn1 and Mn2). These chains are further connected by HL− ligands to form a 3D coordination network. Interestingly, both the hydroxy and the carboxylate groups of the ligands are deprotonated and coordinated to the metal centres, whereas the pyridyl group is protonated and uncoordinated, although it participates in strong hydrogen bonding interactions with oxygen atoms of the HL− ligand, as shown by the Hirshfeld surface analysis. Both the absorption and emission spectra of the compound have also been measured. Variable temperature magnetic studies reveal the presence of a spin-canted antiferromagnetic behaviour with a high coercivity of 40 mT at 2 K and an ordering temperature of 14 K.
TL;DR: In this paper , three 3D TMeQ[6]-based coordination polymers of alkali-earth metal ions (Ca2+, Sr2+ and Ba2+) were characterized, and one can highly selectively detect NFX (norfloxacin) molecules via a fluorescence quenching effect.
Abstract: Three new 3D TMeQ[6]-based coordination polymers of alkali-earth metal ions (Ca2+, Sr2+ and Ba2+) were characterized, and one can highly selectively detect NFX (norfloxacin) molecules via a fluorescence quenching effect.
TL;DR: In this paper , three new polymeric tridimensional compounds with the composition [M3(seb)3(phen)2]n, where M = Co(II), Ni(II) and Mn(II)), seb = (OOC-C8H16-COO)2, phen = C12H8N2 were synthesized and characterized by physical and physico-chemical methods.
TL;DR: In this paper , the solvothermal reaction of zinc(II) nitrate with 1,2,3-benzenetricarboxylic acid and 4,4ʹ-bis(imidazol-1-ylmethyl)biphenyl (BIBPh) produced a crystalline solid {[Zn3(BIBph)3(BTC)2]∙H2O}n.
Abstract: The solvothermal reaction of zinc(II) nitrate with 1,2,3-benzenetricarboxylic acid (1,2,3-H3BTC) and 4,4ʹ-bis(imidazol-1-ylmethyl)biphenyl (BIBPh) produced a crystalline solid {[Zn3(BIBPh)3(BTC)2]∙H2O}n. The product has been structurally characterised and investigated by X-ray diffraction, IR and thermogravimetric methods. The polymer has a bidimentional structure and crystallizes in the P21/c space group of the monoclinic system with the following unit cell parameters: a= 14.8687(16), b= 36.915(4), c= 13.8378(16) (Å), β= 105.584(6)°. The asymmetric unit of the crystal structure contains three zinc(II) ions, three BIBPh ligands and two BTC3- monodentate ligands with all three deprotonated carboxylate groups that balance the overall charge. All zinc centers have similar coordination environment: each metal ion is four coordinated exhibiting a slightly distorted tetrahedral coordination, where two positions are occupied by oxygen atoms of the carboxylic acid and the other two by nitrogen atoms of imidazole subunits
TL;DR: In this article , a single crystal X-ray diffraction was performed to characterize a coordination polymer in the space group Pca21 of an orthorhombic system, which was obtained through IR and thermogravimetric analysis.
Abstract: A complex [Zn(bpy)(acr)2]·H2O (1) was converted in a DMF medium (DMF = N,N′-dimethylformamide) into a coordination polymer [Zn(bpy)(acr)(HCOO)]n (1a) (bpy = 2,2′-bipyridine, and Hacr = acrylic acid), and the species was fully characterized through a single crystal X-ray diffraction. Additional data were obtained by IR and thermogravimetric analysis. Complex (1a) crystalized the coordination polymer in the space group Pca21 of an orthorhombic system. Structural characterization revealed that Zn(II) adopted a square pyramidal stereochemistry generated by bpy molecules, coordinated by chelate, acrylate, and formate ions as unidentate and bridged, respectively. The presence of both the formate and the acrylate with different coordination modes generated two bands in ranges that were characteristic for the carboxylate vibration modes. Thermal decomposition occurs in two complex steps: it first happens via a bpy release, which is followed by an overlapped process that is associated with acrylate and formate decomposition. The obtained complex is of present interest due to the presence of two different carboxylates in its composition and situation, which is rarely reported in the literature.
TL;DR: In this article , three novel tetrathiafulvalene-based coordination polymers, [Co(H2TTFTB) (H2O)4DMF] (1), [Co6(HTTFTB),4(H 2O)] (2) and [Mn4(TTFTBP)4(h2O),7(DMF), were synthesized by simple solvothermal method.
TL;DR: In this paper , a three dimensional cobalt(II)-coordination polymer (CP) using mixed ligands 1,2,4-triazole and oxalic acid was presented, which shows an intrinsic detection capacity for Hacac in aqueous solution.
TL;DR: In this article , the synthesis and crystal structure of the solvent-free coordination polymer CoII(2,5-DMT) with 2-5-dimethoxyterephthalate was reported.
Abstract: We report on the synthesis and the crystal structure of the solvent-free coordination polymer CoII(2,5-DMT) (1) with 2,5-DMT ≡ 2,5-dimethoxyterephthalate which is isostructural to the already reported MnII and ZnII congeners (C2/c, Z = 4). In contrast, for M = MgII, a MOF with DMF-filled pores is obtained, namely Mg2(2,5-DMT)2(DMF)2 (2) (P1¯, Z = 2). Attempts to remove these solvent molecules to record a gas sorption isotherm did not lead to meaningful results. In a comparative study, the thermal (DSC/TGA) and luminescence properties of all the four compounds were investigated. The compounds of the MII(2,5-DMT) composition show high thermal stability up to more than 300 °C, with the ZnII compound having the lowest decomposition temperature. MII(2,5-DMT) with MII = MnII, ZnII and 2 show a bright luminescence upon blue light irradiation (λ = 405 nm), whereas CoII in 1 quenches the emission. While ZnII in ZnII(2,5-DMT) and MgII in 2 do not significantly influence the (blue) emission and excitation bands compared to the free 2,5-DMT ligand, MnII in MnII(2,5-DMT) shows an additional metal-centred red emission.