Rational construction of a triphenylphosphine-modified tetra-nuclear Cu(I) coordinated cluster for enhanced chemodynamic therapy.

A triphenylphosphine-modified tetra-nuclear Cu(I) coordinated cluster was constructed for enhanced chemodynamic therapy (CDT) by increasing the number of metal centers. Once inside human bladder cancer (T24) cells, a larger amount of copper accumulated compared with the mono-nuclear Cu(I) complex; the additional copper could generate more •OH and then induce more obvious apoptosis a Fenton-like reaction, thus further increasing the tumor inhibition effect and ultimately improving the CDT efficiency.

A simple and feasible atom-precise biotinylated Cu(i) complex for tumor-targeted chemodynamic therapy.

A simple and feasible atom-precise biotinylated Cu(i) complex, which can catalyze HO overexpressed commonly in the tumor microenvironment to produce ˙OH through a Fenton-like reaction, was prepared and employed as an effective agent for tumor-targeted chemodynamic therapy.

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.

Two groups of copper pyridine-triazole complexes with "open or close" pepper rings and their antitumor activities.

Based on 1,2-dimethoxyphenyl (veratrole, open) and 1,2-methylenedioxyphenyl (pepper ring, close)-derived pyridine-triazole analogues, two groups of copper(ii) complexes, namely, Group I(C1-C3) and Group II(C4-C6) were synthesized and fully characterized. All ligands and complexes were tested by MTT assays on seven tumour cell lines (T24, Hep-G2, Sk-Ov-3, MGC-803, HeLa, A549 and NCI-H460) and one normal liver cell line (HL-7702). Surprisingly, the pepper-ring-derived complexes (C4-C6) showed significantly enhanced cytotoxicity compared with the 1,2-bimethoxyphenyl ring-derived complexes (C1-C3) and the standard anticancer drug cisplatin.

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.

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.

Synthesis, characterization, DNA/protein interaction and cytotoxicity studies of Cu(II) and Co(II) complexes derived from dipyridyl triazole ligands.

Four different transition metal complexes containing dipyridyl triazole ligands, namely [Cu(abpt)2Cl2]·2H2O (1), [Cu(abpt)2(ClO4)2] (2), [Co2(abpt)2(H2O)2Cl2]·Cl2·4H2O (3) and [Co2(Hbpt)2(CH3OH)2(NO3)2] (4) have been designed, synthesized and further structurally characterized by X-ray crystallography, ESI-MS, elemental analysis, IR and Raman spectroscopy. In these complexes, the both ligands act as bidentate ligands with N, N donors. DNA binding interactions with calf thymus DNA (ct-DNA) of the ligand and its complexes 1~4 were investigated via electronic absorption, fluorescence quenching, circular dichroism and viscosity measurements as well as confocal Laser Raman spectroscopy.

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 .

The Spectroscopy Study of the Binding of an Active Ingredient of Dioscorea Species with Bovine Serum Albumin with or without Co(2+) or Zn(2+).

Diosgenin (DIO) is the active ingredient of Dioscorea species. The interaction of DIO with bovine serum albumin (BSA) was investigated through spectroscopic methods under simulated physiological conditions. The fluorescence quenching data revealed that the binding of DIO to BSA without or with Co(2+) or Zn(2+) was a static quenching process.

Bis(N'-benzoyl-pyridine-4-carbohydrazide)(1,10-phenanthroline)copper(II) dinitrate.

In the title complex, [Cu(C(13)H(11)N(3)O(2))(2)(C(12)H(8)N(2))](NO(3))(2), the Cu(II )atom (site symmetry 2) is coordinated by four N atoms from one 1,10-phenanthroline and two hydrazine ligands, respectively. The hydrazine ligands coordinate to the Cu(II)atom by a pyridine N atom. These four atoms form a slightly distorted square-planar N(4) donor set.

Hexaaqua-magnesium(II) bis-{[2-(1-phenyl-1H-tetra-zol-5-yl)sulfan-yl]acetate}.

The asymmetric unit of the title compound, [Mg(H(2)O)(6)](C(9)H(7)N(4)O(2)S)(2), contains one-half of a [Mg(H(2)O)(6)](2+) cation ( symmetry) and one uncoordinated 2-[(1-phenyl-1H-tetra-zol-5-yl)sulfan-yl]acetate anion. The Mg(II) cation is coordinated by six water mol-ecules, exhibiting a slightly distorted octa-hedral coordination. A two-dimensional network parallel to (001) is formed via extensive hydrogen-bonding inter-actions involving the water mol-ecules as donors and the tetra-zole N and carboxyl-ate O atoms of the anion as acceptors.

{N,N-Dimethyl-N'-[phen-yl(2-pyrid-yl)methyl-ene]ethane-1,2-diamine-κN,N',N''}dithio-cyanato-κN,κS-copper(II).

In the title complex, [Cu(NCS)(2)(C(16)H(19)N(3))], the Cu(II) atom is coordinated by a total of four N atoms; three from one tridentate Schiff base ligand and one from one of the NCS(-) ions. The S atom from the other NCS(-) ion completes the distorted square-pyramidal coordination.

Aqua[N-(2,5-dihydroxybenzyl)imino-diacetato]copper(II).

The title complex, [Cu(C(11)H(11)NO(6))(H(2)O)], contains a Cu(II) atom in a distorted square-pyramidal geometry. The metal centre is coordinated in the basal sites by one water mol-ecule and two carboxyl-ate O atoms and one N atom of the tetra-dentate ligand [Cu-O range, 1.9376 (11)-1.

The first mu3-oxalato-bridged copper complex with tridentate Schiff base ligand N-ethyl-N'-salicylidene-1,2-diaminoethane: synthesis, structure, and magnetic properties.

The first mu(3)-oxalato-bridged copper(II) complex, [[Cu(3)(L)(3)(mu(3)-C(2)O(4))][Cu(L)(H(2)O)](ClO(4))(2)] x 0.5(H(2)O) x 0.5(CH(3)OH), where HL = N-ethyl-N'-salicylidene-1,2-diaminoethane, has been synthesized and characterized by variable-temperature magnetic susceptibility measurement.