Construction and Magnetic Difference of {CoCoM} (M = Co/Cd) Aggregates with Homo- and Heterometallic Centers Derived from {Co} Precursors.

Controllable synthesis of sophisticated aggregations has attracted wide attention from scientists. In this work, homo- and heterometallic {CoCoM} ( = Co/Cd) aggregates with similar skeletons, composed of two [CoM(dpbt)] peripheries and a central [Co(OH)] vertex-fused double-cubane, were constructed from prefabricated {Co} clusters and characterized by single-crystal X-ray diffraction and XPS, ICP-MS, SEM (EDX), and so on. And then, the structure and magnetic differences of them had been further analyzed under dotted with paramagnetic Co ions and/or diamagnetic Cd ions.

Crystal structure, assembly process, and single-molecule magnet behavior of a triangular prismatic {Co} cluster.

Using the polydentate ligand of HL with the Co ion, a triangular prism-type nine-nucleus cluster [Co(L)(CHOCHOH)]·3.5HO ({Co9}-Eg, HL = 6,6'-(1,1'-[3,3'-bi(1,2,4-triazole)]-5,5'-diyl)dipicolinic acid) was constructed. Ion fragmentation during the formation of the {Co9}-Eg cluster was tracked using time-dependent electrospray ionization mass spectrometry.

Tracking the Stepwise Formation of a Water-Soluble Fluorescent Tb Cluster for Efficient Doxorubicin Detection.

Doxorubicin (DOX) is an anthraquinone drug used for the efficient treatment of a variety of tumors in human beings. Unfortunately, its poor biodegradability causes incomplete metabolism in the body. Therefore, it is of great significance to synthesize a sensitive and selective material for DOX detection.

Constructing an unprecedented {Mn} matryoshka doll with a [Mn(CO)] inorganic core and magnetocaloric effect.

An unprecedented inner [Mn(CO)] inorganic core and [Mn] metal-organic periphery compose a high-nuclearity homometallic single-valent {Mn} molecular aggregate with a [Mn] ⊂ [Mn] ⊂ [Mn] ⊂ [Mn] matryoshka doll-like skeleton that displays a significant magnetocaloric effect (MCE).

Hierarchical Construction and Magnetic Difference of {CoM} (M = Co/Cd) Aggregates from {Co} Cluster-Based Precursors in the Presence of Homo/Heterometal Salts.

The controllable construction and function expansion of some sophisticated aggregations represent a current hot topic in scientific research. In this paper, using a prefabricated {Co} cluster as a synthetic precursor, a homometallic {Co} and a heterometallic {CoCd} giant cluster possessing similar dual-[M] (M = Co/Cd) skeletons was prepared by reacting the precursor with excess CoCl and Cd(OAc) salts, respectively. The detailed structural information on {Co} and {CoCd} was characterized by single-crystal X-ray diffraction and further analyzed by X-ray photoelectron spectroscopy, inductively coupled plasma-mass spectroscopy, and scanning electron microscopy with energy dispersive X-ray (EDX) spectroscopy in the solid state.

A novel sandwich shaped {CoCoMo} cluster with a Co triangle encapsulated in two capped CoCoMoO fragments.

A novel discrete {Co14Mo24} nanoscale cluster, {CoIII2CoII10Cl2(dpbt)3(H2O)2[CoIIMoV12O31(CH3O)9]2}·24CH3OH (1) (here, dpbt = 5,5'-di(pyridin-2-yl)-3,3'-bi(1,2,4-triazole)), with a triangular Co4 core encapsulated in two novel capped Co-substituted Keggin-type Co5Mo12O40 anions, has been isolated from alkaline methanol solution. The high-resolution electrospray ionization mass spectrum (HRESI-MS) of microcrystalline 1 in MeOH/CH2Cl2 (v : v = 2 : 1) was recorded. Two prominent overlapping peaks in the range of m/z = 2740-2840 and 1820-1880 for the discrete fragments of [CoIII2CoII12MoV24O62Cl2(dpbt)3(H2O)2(CH3O)x(OH)18-x-2H]2- (x = 9-18, F1) and [CoIII2CoII12MoV24O62Cl2(dpbt)3(H2O)2(CH3O)x(OH)19-x-2H]3- (x = 6-13, F2), respectively, are obtained, confirming the {Co14Mo24} composition in 1.

In Situ Metal-Ligand Reactions under Solvent-Dependent Hydro(solvo)thermal Conditions: Structures, Mass Spectrometry, and Magnetism.

In this study, four in situ hydro(solvo)thermal metal-ligand reactions, including oxidation (HL), C-C coupling (HL), nitration (HL), and condensation (HL), based on bis[3-(pyridin-2-yl)-1-1,2,4-triazol-5-yl]methane (HL), in the presence of Dy ions, were carried out. The in situ metal-ligand reaction gave six new ligands existing in eight novel Dy coordination complexes, which were characterized by crystal structure, mass spectrometry, and magnetism.

Antioxidant and Antiapoptotic Polyphenols from Green Tea Extract Ameliorate CCl-Induced Acute Liver Injury in Mice.

Objective: To investigate the phenolic composition, antioxidant properties, and hepatoprotective mechanisms of polyphenols from green tea extract (GTP) in carbon tetrachloride (CCl)-induced acute liver injury mouse model.

Methods: High-performance liquid chromatography was used to analyze the chemical composition of the extract. Antioxidant activity of GTP was assessed by O, OH, DPPH, and ferric-reducing antioxidant power (FRAP) assay in vitro.

Hierarchical Assembly of a {Co} Cluster from Two Vertex-Fused {Co} Clusters and Their Single-Molecule Magnetism.

We present the synthesis, structural characterization, and magnetic properties of two high-nuclearity cobalt clusters formulated as [Co(μ-OH)(μ-Cl)(dpbt)(ptd)Cl][Co(HO)Cl]·(CH)CHOH (1) and [Co(μ-OH)(μ-Cl)(dpbt)(ptd)Cl]·2CHCHOH (2), respectively (Hdpbt = 5,5'-bis(pyridin-2-yl)-3,3'-bis(1,2,4-triazole) and Hptd = 3-(pyridin-2-yl)-1,2,4-triazine-5,6-diol). Compound 1 is composed of an inner [Co(μ-OH)(μ-Cl)] cubane and an outer [Co(dpbt)(ptd)Cl] defective adamantane. Compound 2 reveals a giant {Co} cluster possessing a dual-[Co] skeleton from 1.

SHYCD induces APE1/Ref-1 subcellular localization to regulate the p53-apoptosis signaling pathway in the prevention and treatment of acute on chronic liver failure.

decoction(SHYCD) is derived from the yin chen hao decoction, a well-known and canonical Chinese medicine formula from the "Treatise on Febrile Diseases". Over the past decade, SHYCD has been used to treat and prevent the liver cirrhosis and liver failure. In the present study, we investigated the effects of SHYCD for acute on chronic liver failure(ACLF) and explored its potential mechanism.

A single-stranded {Gd18} nanowheel with a symmetric polydentate diacylhydrazone ligand.

An unprecedented {Gd18} nanowheel was solvothermally synthesized with a novel diacylhydrazone ligand. It features a rare single-stranded skeleton just like a Reuleaux triangle with vertices buckled in, represents the highest nuclearity and largest size in lanthanide (Ln) wheels reported so far, and shows a large magnetocaloric effect (MCE).

[Protective effect of Sanhuangyinchi Fang drug serum on hydrogen peroxide-induced DNA oxidative damage in LO2 cells].

Objective: To study the protective effect of Sanhuangyinchi Fang drug serum (SF) against hydrogen peroxide-mediated DNA oxidative damage in LO2 cells.

Methods: The LO2 cells were randomly divided into the control group, H(2)O(2) group, SF groups (5%, 10%, and 15%) and vitE group. The morphological features of the treated LO2 cells were observed under inverted microscope.

An intuitional hierarchical assembly of cluster-organic frameworks with a thickness of 1.97 nm from a discrete Co14 cluster.

An intuitional hierarchical assembly, metaphorically referred to as a "blossom and yield fruit" process, from a discrete cluster {[Co14(CH3O)4(dpbt)6Cl12]·14CH3OH, ()} to 2D cluster organic frameworks {[Co14(CH3O)10(dpbt)6 Cl6]·12CH3OH, ()}, has been established. The magnetic ordering of was obviously improved compared with .

Solvent effects on the structures and magnetic properties of two doubly interpenetrated metal-organic frameworks.

Two doubly interpenetrated coordination polymers [Co2(BDC)2(bpt)2]·nSolvent based on dimeric secondary building units and crystallizing with distinct solvent molecules (-H2O and -MeOH for nSolvent = 2H2O and MeOH·H2O, respectively) were obtained by employing 1,4-benzenedicarboxylate (BDC) and 1H-3,5-bis(4-pyridyl)-1,2,4-triazole) (bpt) as linkers. The structures consist of a square grid of dimers bridged by BDC and pillared by bpt. Thermogravimetry and PXRD indicate that the frameworks are stable and are retained up to 400 °C, but the structures are modified irreversibly.

Triaqua-(cyclo-hex-4-ene-1,2-dicarboxyl-ato-κO(1))(1,10-phenanthroline-κ(2)N,N')cobalt(II).

In the title compound, [Co(C(8)H(8)O(4))(C(12)H(8)N(2))(H(2)O)(3)], the Co(II) atom is coordinated by two N atoms from a bidentate 1,10-phenanthroline ligand, one O atom from a monodentate 4-cyclo-hexene-1,2-dicarboxyl-ate ligand and three water O atoms in a distorted octa-hedral geometry. The mononuclear mol-ecules are engaged in extensive intra- and inter-molecular O-H⋯O hydrogen-bonding inter-actions and π-π stacking inter-actions [centroid-centroid distance = 3.784 (3) Å], forming a three-dimensional supra-molecular network.