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A Bifunctional Luminescent Coordination Polymer as Recyclable Sensor for Detecting TNP and Fe3+ with High Selectivity and Sensitivity
摘要： A thermo-stable three dimensional network [Cd2(BPDPE)2(1,2-H2bdc)2]n (1) (1,2-H2bdc = 1,2-benzenedicarboxylic acid, BPDPE = 4,4′-bis(pyridyl)diphenyl ether) with blue fluorescence was successfully synthesized and characterized. Complex 1 is a two-dimensional layer constructed by BPDPE connecting [Cd(1,2-bdc)]n one-dimensional chains, then a three-dimensional network is finally formed via π···π interactions. Importantly, Complex 1 presents an excellent fluorescent MOF sensor for highly sensitive and selective detecting TNP, the Ksv is up to 1.03×105 M-1. Further more, complex 1 can be quickly regenerated by simple washing, exhibiting good recyclability for detecting TNP. In addition, complex 1 shows higher sensitive fluorescent sensor for detecting Fe3+ cation than other metal ions. the Ksv is calculated to be 1.84×105 M-1. Furthermore, the quenching mechanisms of complex 1 as bifunctional sensor were studied as well.
关键词： Nitro aromatic explosives,Selectivity and sensitivity,Fluorescence sensing,Metal ions,Coordination polymer
更新于2025-09-10 09:29:36
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Gallium Coordination Polymers Based on Bis-pyridylethylene Containing Neutral and Cationic 1D Chains and 2D Networks
摘要： Two new coordination polymers constituted by gallium trichloride and 1,2-bis(4-pyridyl)ethylene (bpe) were synthesized. Reactions by the solvent-free melt-synthesis approach lead to the unusual formation of multiple cationic coordination polymers containing one-dimensional chains and two-dimensional networks in one compound of the formula. Reactions under solvothermal conditions in benzene lead to the formation of a neutral one-dimensional coordination polymer. Both coordination polymers were characterized by SCXRD, PXRD, simultaneous DTA/TG, elemental analysis, and IR spectroscopy.
关键词： 1,2-Bis(4-pyridyl)ethylene,Coordination polymer,Gallium
更新于2025-09-10 09:29:36
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Functional Protein-Assisted Fabrication of Fe-Gallic Acid Coordination Polymer Nanonetworks for Localized Photothermal Therapy
摘要： Fe-polyphenols coordination polymers have emerged as a versatile theranostic nanoplatform for biological applications owing to the appealing biocompatibility of precursors from nature. Incorporating bioactive molecules with Fe-polyphenols coordination polymers is greatly significant to take full advantages of their superiorities for advanced application. Herein, we show functional protein-assisted fabrication of Fe-gallic acid (GA) nanonetworks via a mild and facile biomineralization for photothermal therapy. Mild alkaline condition is crucial to obtain protein-Fe-GA nanonetworks with intense near-infrared absorption and their unique network structure allows reducing the leakage to the surrounding normal tissues, benefiting high photothermal therapeutic efficacy and minimal side effects. The proposed bovine serum albumin-Fe-GA nanonetworks are successfully used to eradicate tumor in vivo. In addition, this universal method can be extended to synthesize other protein-involved nanonetworks, such as human serum albumin-Fe-GA and ovalbumin-Fe-GA. More importantly, the intrinsic bioactivity of protein can be retained in the nanonetworks, and the ovalbumin-Fe-GA nanonetworks enable inducing the maturation of immune cells, showing the successful fusion of immune activity of ovalbumin into the nanonetworks. The proposed biomineralization strategy shows a bright prospect in incorporating various functional proteins, such as enzymes and antibodies, to form protein-Fe-GA nanonetworks with good biocompatibility, favorable photothermal effect and specific biological function.
关键词： immune activation,coordination polymer,biocompatibility,photothermal therapy,biomineralization,polyphenols
更新于2025-09-10 09:29:36
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Crystal structure, thermal stability and photoluminesence properties of five new Zn(II) coordination polymers constructed from mixed ligand; N-donor pyridine ligands and bis(4-carboxylphenyl)phosphinic acid
摘要： Five new Zn(II) coordination polymers, {[Zn2(HBPO)2(phen)2(H2O)2].H2O}n (1), [Zn2(BPO)(H2BPO)(phen)4]·2(H2BPO)·4H2O (2), {[Zn(HBPO)(4,4’-bipy)0.5].H2O}n (3), [Zn(HBPO)(dpe)0.5]n (4) and {[Zn2(HBPO)2(dpp)].H2O}n (5), constructed from mixed ligand; bis(4-carboxylphenyl)phosphinic acid (H3BPO) and N-donor pyridine ligands (phen, 4,4’-bipy, dpe and dpp), have been synthesized and characterized by single crystal X-ray diffraction, IR spectroscopy and elemental analyses. Intermolecular hydrogen bonds, π- π interaction and other intermolecular interaction are effective in stabilization of the crystal structure of these supramolecular complexes. The thermal stability and luminescence properties of compounds 1-5 in the solid state were studied too.
关键词： Mixed ligands,Zinc(II) coordination polymer,Photoluminescence,Hydrogen bonds,N-donor ligands
更新于2025-09-09 09:28:46
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Two Zn(II) coordination polymers based on 5-substituted isophthalic acid: syntheses, crystal structures, luminescence sensing properties
摘要： Two new Zn(II) coordination polymers (CPs), {[Zn(L)(5-nip)]2·5.5H2O}n (1) and {[Zn(L)(5-mip)]·EtOH}n (2) [L = 1,3-bis(benzimidazol-1-yl)-2-propanol, 5-H2nip = 5-nitroisophthalic acid, 5-H2mip = 5-methyisophthalic acid] were solvothermally synthesized and characterized by elemental analyses, IR spectra, thermogravimetric analyses, and single-crystal X-ray diffraction. CP 1 possesses a 1D ladder-like chain structure and further packed into 2D supramolecular architectures by π-π stacking interactions. CP 2 exhibits a 2D 63 layer, which is finally extended into 3D supramolecular network via the weak C–H···O hydrogen bond interactions. CP 1 and CP 2 can be used as luminescent sensors for Hg2+ and Cr2O7 2- ions in water.
关键词： Znic(II),Bis(benzimidazole),Luminescence quenching,Supramolecular architecture,Coordination polymer
更新于2025-09-09 09:28:46
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Estimating the Individual Spectroscopic Properties of Three Unique Eu <sup>III</sup> Sites in a Coordination Polymer
摘要： We isolated a coordination polymer with the formula [Eu3(3,5-dcba)9(H2O)(dmf)3]·2dmf, with three unique EuIII coordination sites in the asymmetric unit, with the EuIII ions bridged by 3,5-dichlorobenzoato (3,5-dcba) ligands. The coordination polymer crystallized in the triclinic space group P1? with unit cell dimensions a = 12.4899(15), b = 16.326(2), and c = 25.059(3) ?, α = 84.271(3)°, β = 84.832(3)°, and γ = 68.585(3)° and V = 4725.2(10) ?3. The characteristic 5D0 → 7FJ (J = 0?4) EuIII transitions were observed upon ligand-centered excitation. Emission lifetimes of 0.825 ± 0.085 and 1.586 ± 0.057 ms were observed and were attributed to the sites with coordination of water or dimethylformamide (dmf) molecules to each ion, respectively. Through a combination of spectroscopy and calculations, we determined the photophysical properties of each unique EuIII site. Energy-transfer rates ligand → EuIII were determined for each unique site using the overlapped polyhedra method. The rates depend on the coordinated water molecules and the different donor?acceptor distances. The two sites without coordinated water molecules and shortest donor?acceptor distance display the fastest energy-transfer rate ligand → EuIII, whereas the site with coordinated water molecules and longest donor?acceptor distance displays the slowest energy-transfer rate. Donor?acceptor distances were estimated computationally and were confirmed by calculating the frontier orbitals in the asymmetric units of the polymer using density functional theory.
关键词： coordination polymer,photophysical properties,energy-transfer rates,density functional theory,EuIII
更新于2025-09-09 09:28:46
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Crystal Structure and Luminescent Property of a One-Dimensional Chain Based on 1-(4-Nitrophenyl)-1,2,4-Triazole
摘要： A neutral one-dimensional CdII coordination polymer [Cd(NO2–BDC)(NPT)(H2O)2]n (1) (NO2–H2BDC=5-nitro-1,3-benzenedicarboxylic acid, NPT=1-(4-nitrophenyl)-1,2,4-triazole) is prepared and characterized through IR, elemental and thermal analyses, and single crystal X-ray diffraction. The single crystal X-ray diffraction analysis reveals that complex 1 is comprised of neutral 1D zigzag chains. The luminescence and thermal stability of complex 1 are investigated.
关键词： 1-(4-nitrophenyl)-1,2,4-triazole,one-dimensional chain,luminescence,coordination polymer,synthesis,5-nitro-1,3-benzenedicarboxylic acid
更新于2025-09-04 15:30:14
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High-temperature high pressure synthesis of monoclinic Y2O3
摘要： In this work, synthesis of cubic Y2O3 by calcining yttrium based coordination polymer (Y-CP) which were obtained by microwave-assisted method was reported. Monoclinic Y2O3 was obtained by treating the cubic Y2O3 under high temperature high pressure (HTHP) on a large volume cubic multi-anvil high pressure apparatus. The effect of temperature on the preparation was studied. The morphology and crystal phase of all samples have been characterized by the scanning electron microscope (SEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR) spectra. What more, the photoluminescence (PL) property of the Y2O3: Eu3+ sample was investigated. This method can be used to prepare other rare earth oxide with various phase.
关键词： Coordination polymer,luminescence,Y2O3,high temperature high pressure,Phase transformation
更新于2025-09-04 15:30:14
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A three-dimensional Zn <sup>II</sup> coordination network based on 5,5′-methylenebis(2,4,6-trimethylisophthalic acid) and 2,7-bis(1 <i>H</i> -imidazol-1-yl)fluorene: synthesis, structure and luminescence properties
摘要： In recent years, coordination polymers constructed from multidentate carboxylate ligands and N-containing ligands have attracted much attention since these ligands can adopt a rich variety of coordination modes which can lead to crystalline products with intriguing structures and interesting properties. A new coordination polymer, namely poly[[diaqua[μ-2,7-bis(1H-imidazol-1-yl)fluorene-κ2N3:N3′][μ-5,5′-methylenebis(2,4,6-trimethylisophthalato)-κ2O1:O1′]zinc(II)] hemihydrate], {[Zn(C23H22O8)(C19H14N4)(H2O)2]·0.5H2O}n, 1, was prepared by the self-assembly of Zn(NO3)2·6H2O with 5,5′-methylenebis(2,4,6-trimethylisophthalic acid) (H4BTMIPA) and 2,7-bis(1H-imidazol-1-yl)fluorene (BIF) under solvothermal conditions. The structure of 1 was determined by elemental analysis, single-crystal X-ray crystallography, powder X-ray diffraction, IR spectroscopy and thermogravimetric analysis. Each ZnII ion is six-coordinated by two O atoms from two H2BTMIPA2? ligands, by two N atoms from two BIF ligands and by two water molecules, forming a distorted octahedral ZnN2O4 coordination geometry. Adjacent ZnII ions are linked by H2BTMIPA2? ligands and BIF ligands, leading to the formation of a two-dimensional (2D) (4,4)-sql network, and intermolecular hydrogen-bonding interactions connect the 2D layer structure into the three-dimensional (3D) supramolecular structure. Each 2D layer contains two kinds of helices with the same direction, which are opposite in adjacent layers. The luminescence properties of complex 1 in the solid state have also been investigated.
关键词： crystal structure,fluorescence properties,two-dimensional coordination polymer,supramolecular,5,5′-methylenebis(2,4,6-trimethylisophthalic acid,zinc(II),2,7-bis(1H-imidazol-1-yl)fluorene,hydrogen bonding
更新于2025-09-04 15:30:14