A Stable Zn(II) Metal-Organic Framework as Turn-On and Blue-Shift Fluorescence Sensor for Amino Acids and Dipicolinic Acid in Living Cells or Using Aerosol Jet Printing.

Amino acids and dipicolinic acid (DPA) are important biomarkers for identifying human health. Establishing rapid, accurate, sensitive, and simple assays is essential for disease prevention and early diagnosis. In this work, a novel Zn(II) metal-organic framework (MOF) with the formula {[Zn(μ-OH)(BTDI)(dpp)]·dpp·4HO·2DMF} (, where denotes Jiangxi University of Science and Technology, HBTDI = 5,5'-(benzo[][1,2,5]thiadiazole-4,7-diyl)diisophthalic acid; dpp = 1,3-di(4-pyridyl)propane) was successfully synthesized via a mixed-ligands strategy.

Effect of Substituents in Equatorial Hexaazamacrocyclic Schiff Base Ligands on the Construction and Magnetism of Pseudo Single-Ion Magnets.

Three mononuclear Dy compounds [DyL(PhSiO)][BPh]·MeCN·2HO (), [DyL(PhSiO)][BPh]·CHOH·HO (), and [DyL(PhSiO)(OAc)][BPh]·CHOH·3HO () and their corresponding Y diluted analogues [DyYL(PhSiO)][BPh]·MeCN·2HO (), [DyYL(PhSiO)][BPh]·CHOH·HO (), and [DyYL(PhSiO)(OAc)][BPh]·CHOH·3HO () were synthesized with hexaazamacrocyclic Schiff base ligands as an equatorial ligand. The substituents in the equatorial hexaazamacrocyclic Schiff base ligand show a significant effect on the replacement of the axial ligands. Compounds , , and are typical zero dc field single-molecule magnets with effective energy barriers () of 1092(6), 946.

In Situ Synthesis of Copper-Based Metal-Organic Frameworks with Ligand Defects for Electrochemical Reduction of CO into C Products.

Electrochemical reduction of CO into high-value-added products is a potential approach to solving environmental problems but is limited by poor product selectivity and low efficiency. Metal-organic framework (MOF) materials have been considered one of the most promising catalysts, but their application is limited by complicated preparation processes, especially during the synthesis of organic ligands. In this work, a new three-dimensional Cu-MOF () with high porosity was constructed based on the naphthalene diimide (NDI) ligand.

The effect of long-term hemodialysis on diabetic retinopathy observed by swept-source optical coherence tomography angiography.

Background: Diabetes can cause chronic microvascular complications such as diabetic retinopathy (DR) and diabetic nephropathy (DN). DR and DN can lead to or exacerbate diabetic macular edema (DME). Hemodialysis (HD) is the main treatment method for patients with end-stage kidney disease (ESKD) secondary to DN.

Reversible single-crystal-to-single-crystal transition in Gd(III) metal-organic frameworks induced by heat and solvents with a significant magnetocaloric effect.

The design and synthesis of a Gd(III) metal-organic framework with the formula [Gd(BTDI)(DMF)] (JXUST-40, HBTDI = 5,5'-(benzo[][1,2,5]thiadiazole-4,7-diyl)diisophthalic acid) are reported hererin. Interestingly, a reversible single-crystal-to-single-crystal transition between JXUST-40 and {[Gd(BTDI)(HO)]·6HO} (JXUST-40a) was achieved under the stimulation of heat and solvents. Both JXUST-40 and JXUST-40a exhibited good stability when soaked in common solvents and aqueous solutions with pH values of 1-12.

A dinuclear Cd cluster-based stable luminescent metal-organic framework for the consecutive and visual detection of HPO and OCN.

Due to their hazard to biological systems, it is urgent to develop materials that can rapidly and sensitively detect the concentration of HPO and OCN ions. In this work, a new Cd-based luminescent metal-organic framework with the formula [Cd(BTDB)(2,6-BBIP)] (JXUST-47, HBTDB = (benzo[][1,2,5]thiadiazole-4,7-diyl)dibenzoic acid, 2,6-BBIP = 2,6-bis(benzimidazol-1-yl)pyridine) and topology was successfully synthesized using a mixed-ligand strategy. JXUST-47 shows good chemical and thermal stability.

Effects of cadmium exposure on haemocyte immune function of clam Ruditapes philippinarum at different temperatures.

Haemocytes are crucial for the immune defence of mollusks. It is important to explore the immune performance of haemocytes of mollusks under the stress of heavy metals with global warming. In order to study the effects of cadmium (Cd) exposure and temperature stress on the haemocyte immune function of clam Ruditapes philippinarum, clams were exposed to different Cd concentrations (0.

Solvent- and pH-Stable Eu(III)-Based Metal-Organic Framework with Phosphate-Ratio Fluorescence Sensing and Significant Proton Conduction.

Lanthanide-based metal-organic frameworks show good potential for applications due to their unique structures and functional properties. A highly thermally and acid-base stable was synthesized by a solvothermal method with the molecular formula {[(CH)NH][Eu(NDDP)(HO)]·HO} (, HNDDP = 5,5'-(naphthalene-2,6-diyl)diisophthalic acid). takes a three-dimensional (4,4,8)-connected topology.

Multistimuli-responsive multicolor solid-state luminescence tuned by NH-dependent switchable hydrogen bonds.

Revealing the stimuli-responsive mechanism is the key to the accurate design of stimuli-responsive luminescent materials. We report herein the multistimuli-responsive multicolor solid-state luminescence of a new dicopper(I) complex [{Cu(bpmtzH)}(μ-dppa)](ClO) (1), and the multistimuli-responsive mechanism is clarified by investigating its four different solvated compounds 1·2CHCOCH·2HO, 1·2DMSO·2HO, 1·4CHOH, and 1·4CHCl. It is shown that luminescence mechanochromism is associated with the breakage of the hydrogen bonds of bmptzH-NH with counter-ions such as ClO induced by grinding, while luminescence vapochromism is attributable to the breaking and forming of hydrogen bonds of dppa-NH with solvents, such as acetone, dimethylsulfoxide, and methanol, caused by heating and vapor fuming.

Fluorescence sensing and device fabrication with luminescent metal-organic frameworks.

Metal-organic frameworks (MOFs) are a novel class of hybrid porous multi-functional materials consisting of metal ions/clusters and organic ligands. MOFs have exclusive benefits due to their tunable structure and diverse properties. Luminescent MOFs (LMOFs) exhibit both porosity and light emission.

A Pair of Multifunctional Cu(II)-Dy(III) Enantiomers with Zero-Field Single-Molecule Magnet Behaviors, Proton Conduction Properties and Magneto-Optical Faraday Effects.

Multifunctional materials with a coexistence of proton conduction properties, single-molecule magnet (SMM) behaviors and magneto-optical Faraday effects have rarely been reported. Herein, a new pair of Cu(II)-Dy(III) enantiomers, [DyCu(-HL)(HO)(NO)]·(NO)·(HO) (- and -) (HL = [/] -N,N'-bis [3-hydroxysalicylidene] -1,2-cyclohexanediamine), has been designed and prepared using homochiral Schiff-base ligands. - and - contain linear Cu(II)-Dy(III)-Cu(II) trinuclear units and possess 1D stacking channels within their supramolecular networks.

A highly stable chain-based Eu metal-organic framework as a turn-on and blue-shift luminescent sensor for dipicolinic acid.

The development of a rapid and selective method for the identification of dipicolinic acid (DPA), a specific biomarker in spores, is of great importance for the avoidance of anthrax infection. Herein, a chain-based Eu metal-organic framework with the formula {[Eu(BTDB)(μ-OH)(HO)]·solvents} (JXUST-38, HBTDB = (benzo[][1,2,5]thiadiazole-4,7-diyl)dibenzoic acid) was obtained using 2-fluorobenzoic acid as the pH regulator. JXUST-38 exhibits good chemical and thermal stability and can specifically recognize DPA in ,-dimethylformamide solution through luminescence enhancement and blue-shift effects with a detection limit of 0.

Stable Europium(III) Metal-Organic Framework Demonstrating High Proton Conductivity and Fluorescence Detection of Tetracyclines.

A europium(III) metal-organic framework (MOF), namely, {[[(CH)NH]Eu(DTTP-2OH)(HCOO)(HO)]·4HO} (, HDTTP-2OH = 2',5'-dihydroxy-[1,1':4',1″-terphenyl]-3,3″,5,5″-tetracarboxylic acid) has been assembled through solvothermal method. The is a three-dimensional (3D) (4,4,8)-connected topological framework with binuclear Eu(III) clusters as secondary building units, in which a richly ordered hydrogen bonding network formed among the free HO molecules, dimethylamine cations, and phenolic hydroxyl groups provides a potential pathway for proton conduction. The proton conductivity reaches the category of superionic conductors (σ > 10 S cm) at room temperature with a maximum conductivity of 1.

Mechanochromic and Selective Vapochromic Solid-State Luminescence of a Dinuclear Cuprous Complex.

The unraveling of the stimuli-responsive mechanism is crucial to the design and precise synthesis of stimuli-responsive luminescent materials. We report herein the mechanochromic and selective vapochromic solid-state luminescence properties of a new bimetallic cuprous complex [{Cu(bpmtzH)}(μ-dppm)](ClO) (), and the corresponding response mechanisms are elucidated by investigating its two different solvated polymorphs ·2CHCl () and ·2CHCl (). Green-emissive and cyan-emissive can be interconverted upon alternate exposure to CHCl and CHCl vapors, which is principally attributable to a combined alteration of both intermolecular NH···OClO hydrogen bonds and intramolecular "triazolyl/phenyl" π···π interactions induced by different solvents.

Dual-response fluorescence sensing of HPO and CO using AJP filter paper based on a pH-stable Cd-based luminescent metal-organic framework.

A new Cd-based luminescent metal-organic framework (LMOF) with the formula {[Cd(BIBT)(NDC)]·solvents} (JXUST-32, BIBT = 4,7-bi(1-imidazol-1-yl)benzo-[2,1,3]thiadiazole and HNDC = 2,6-naphthalenedicarboxylic acid) was successfully synthesized by a solvothermal method. JXUST-32 shows a two-dimensional (4,4)-connected network and exhibits significant fluorescence red shift and slight enhancement for HPO and CO sensing with detection limits of 0.11 and 0.

Near-Room-Temperature Synergetic Response of Magnetism, Dielectricity and Luminescence Based on (C NH Cl) MnBr.

Multifunctional materials with working temperatures near room temperature are crucial for practical applications. Until now, it is still a great challenge to obtain such materials. In this paper, a complex of (C NH Cl) MnBr (1) with a structural phase transition near room temperature is reported.

Synthesis and Structure of an Aqueous Stable Europium-Based Metal-Organic Framework with Ratiometric Fluorescence Sensing for Phosphate and Luminescence Quenching for Salicylaldehyde.

An aqueous stable europium-based metal-organic framework with properties of ratiometric fluorescence sensing, namely, {[(CH)NH][Eu(TCPB)(HO)]·DMF} (; HTCPB = 1,2,4,5-tetrakis(4-carboxyphenyl)-benzene), was synthesized under solvothermal conditions and structurally characterized. Crystal structure analysis shows that is a three-dimensional porous crystal, in which the Eu ion is an eight-coordinate square inverse prism with eight oxygen atoms. Fluorescence measurements show that exhibits characteristic emission of the Eu ion and ligand.

Solvothermal synthesis and device fabrication of a Eu-based metal-organic framework as a turn-on and blue-shift fluorescence sensor toward Cr, Al and Ga.

A novel three-dimensional Eu-based metal-organic framework with the formula {[(CH)NH][Eu(BTDI)]·HO·DMF} (JXUST-25) was prepared by solvothermal method based on Eu and 5,5'-(benzothiadiazole-4,7-diyl)diisophthalic acid (HBTDI) with benzothiadiazole (BTD) luminescent groups. Due to the presence of Eu and organic fluorescence ligand, JXUST-25 displays turn-on and blue-shift fluorescence toward Cr, Al and Ga with limits of detection (LOD) of 0.073, 0.

Controllable Synthesis of Tb Metal-Organic Frameworks with Reversible Luminescence Sensing for Benzaldehyde Vapor.

Two novel lanthanide metal-organic frameworks (MOFs) with the formulas [Tb(bidc)(Hbidc)(HO)] () and {[Tb(bidc)(HCOO)(DMF)]·solvents} () were synthesized based on 2,1,3-benzothiadiazole-4,7-dicarboxylic acid (HBTDC) under solvothermal conditions. Interestingly, benzimidazole-4,7-dicarboxylic acid (Hbidc) was formed in situ using HBTDC as the starting material. The self-assembly process of the targeted MOFs with different topological structures can be controlled by the solvents and concentration of the reactants.

Enhanced Heterogeneous Catalytic Activity of Peroxymonosulfate for Rhodamine B Degradation via a Co-Based Metal-Organic Framework.

A stable metal-organic framework with the formula {[Co(BBZB)(IPA)]·HO} (, BBZB = 4,7-bis(1-benzimidazole-1-yl)-2,1,3-benzothiadiazole and HIPA = isophthalic acid) was constructed by incorporating Co ions and two conjugated ligands under solvothermal conditions. takes a dinuclear cluster-based layer structure with a porosity of 2.7%.