The quest for the single-molecular magnets (SMMs) based on mononuclear transition-metal complexes is focused low-coordinate species. No complex with a coordination number of eight has been shown to exhibit SMM properties. Here magnetic studies have carried out mononuclear, eight-coordinate cobalt(II)-12-crown-4 (12C4) [CoII(12C4)2](I3)2(12C4) (1) large axial zero-field splitting. Magnetic measurements show field-induced, slow relaxation under an applied field 500 Oe at low temperature. time...

We report here the preparation of self-assembled persimmon-like (BiO)2CO3 microstructures via a simple hydrothermal process. Powder X-ray diffraction (XRD), energy dispersive spectroscopy (EDS), field emission scanning electron microscopy (FE-SEM), selected area (SAED) and high resolution transmission (HRTEM) were employed to characterize phases morphologies products. The reactants could greatly influence final growth process has been investigated. be utilized as sacrificial template...

We report here the preparation of flower-like Bi2WO6via a simple, rapid, microwave-assisted solution-phase process. Powder X-ray diffraction (XRD), energy dispersive spectroscopy (EDS), field emission scanning electron microscopy (FE-SEM) and high resolution transmission (HRTEM) were employed to characterize phase morphologies products. The time-dependent experiments showed an Ostwald ripening mechanism in crystal growth as-prepared Bi2WO6 was able efficiently degrade Rhodamine B (RhB) under...

The hierarchical flower-like Bi2MoO6 microstructures have been prepared via a facile solvothermal approach, employing ethylene glycol as the reaction medium in presence of ethylenediamine. flake-like building units hierarchical, were constructed by many smaller spherical particles. Reaction temperature, time and volume ethylenediamine studied found to play crucial roles formation architectures. A possible mechanism was proposed based on results morphology evolution function time. exhibit...

Two mononuclear seven-coordinate cobalt(II) complexes [Co(L)3(NO3)2] (L = 4-tert-butylpyridine, 1; L isoquinoline, 2) were prepared and structurally analyzed by single-crystal X-ray crystallography. The coordination spheres of 1 2 exhibit distorted pentagonal bipyramid geometry. Analysis their direct-current magnetic data reveals the existence easy plane anisotropy (D > 0) with a small transverse (E), which was further confirmed high-field electron paramagnetic resonance (HFEPR)...

Dinuclear Cu(I) complexes bearing hexadentate, macrocyclic N-heterocyclic carbene (NHC) ligands, [Cu2(L1)(CH3CN)][PF6]2 (1) and [Cu2(L2)(CH3CN)]2[Cu2(L2)(CH3CN)2][PF6]6 (2), have been synthesized by the reactions of [H4L][PF6]4 (L = L1, L2) with excess Cu2O in acetonitrile. Crystallizations heat-treated samples 1 2 from acetone/methanol/ether or CH3NO2/ether result [Cu2(L1)][PF6]2 (3) [Cu2(L2)][PF6]2 (4). Complexes 1-4 are emissive luminescent maxima at 464, 472, 540, 488 nm solid state,...

Novel polynuclear Cu(II) complexes containing derivatives of 1,2,4-trizaole and pivalate ligands, [Cu3(μ3-OH)(μ-adetrz)2(piv)5(H2O)]·6.5H2O (1) (adetrz = 4-amino-3,5-diethyl-1,2,4-triazole, piv pivalate), [Cu4(μ3-OH)2(μ-atrz)2(μ-piv)4(piv)2]·2MeOH·H2O (2) (atrz 4-amino-1,2,4-triazole), [Cu4(μ3-OH)2(μ-tbtrz)2(μ-piv)2(piv)4]·4H2O (3) (tbtrz 4-tert-butyl-1,2,4-trizaole), [Cu4(μ3-O)2(μ-admtrz)4(admtrz)2(μ-piv)2(piv)2]·2[Cu2(μ-H2O)(μ-admtrz)(piv)4]·13H2O [4 4a·2(4b)·13H2O; admtrz...

Two mononuclear tetrahedral Co(II) complexes (HNEt3)2[Co(L1)2]·H2O (1) and (Bu4N)2[Co(L2)2]·H2O (2) (H2L1 = N,N′-bis(p-toluenesulfony1)oxamide, H2L2 N,N′-diphenyloxamide) have been synthesized, their structures characterized by single-crystal X-ray diffraction. Both adopt distorted coordination geometries surrounding the center, which is ligated two doubly deprotonated oxamide ligands oriented perpendicularly to each other. Their axial magnetic anisotropies were revealed direct current (dc)...

A fast and economical route based on microwave-assisted hydrothermal reaction has been developed to synthesize pancake-like Fe2(MoO4)3 microstructures. The phase morphology of the products have characterized by powder X-ray diffraction (XRD), energy dispersive spectrometry (EDS), selected area electron (SAED), high resolution transmission microscopy (HRTEM) scanning (SEM). Several factors, including amount nitric acid, time, temperature iron source, play crucial roles in formation multilayer...

Five rhenium(I) tricarbonyl chloride complexes with pyridine-functionalized N-heterocyclic carbenes, Re(CO)3(L)Cl (L = 3-methyl-1-(2-pyridyl)imidazol-2-ylidene (1), 3-methyl-1-(2-picolyl)imidazol-2-ylidene (2), 3-methyl-1-(2-pyridyl)benzimidazolin-2-ylidene (3), 3-methyl-1-(2-picoyl)benzimidazolin-2-ylidene (4), 1-methyl-4-(2-pyridyl)-1,2,4-triazoline-5-ylidene (5)), have been synthesized by silver carbene transmetalation and characterized elemental analysis, 1H NMR, 13C IR spectra. The...

Ruthenium(II) nitrosyl complexes with pyridine-functionalized N-heterocyclic carbenes [(L)Ru(NO)Cl3] [L = 3-tert-butyl-1-(2-pyridyl)imidazol-2-ylidene, 2a; 3-n-butyl-1-(2-pyridyl)imidazol-2-ylidene, 2b; 3-tert-butyl-1-picolylimidazol-2-ylidene, 2c; 3-n-butyl-1-picolylimidazol-2-ylidene, 2d; and 3-benzyl-1-picolylimidazol-2-ylidene, 2e] have been prepared by transmetalation from the corresponding silver carbene complexes. Compounds 2a−c characterized single-crystal X-ray crystallography. 2a−e...

Slow magnetic relaxation originating from the low spin state Co(<sc>ii</sc>) ions is firstly observed in five-coordinate spin-crossover complexes.

Abstract The structural characterization and magnetic studies of three mononuclear Mn III complexes based on the dibenzoylmethanido (dbm – ) ligand, Mn(dbm) 3 ( 1 [Mn(dbm) 2 (L) ](ClO 4 (L = dimethyl sulfoxide, ; L pyridine, ), are reported. ions in an axially elongated octahedral coordination geometry. axial zero‐field‐splitting parameters D , ranging from –3.42 to –4.52 cm –1 for complexes, were obtained by fitting magnetic‐susceptibility magnetization data. Ab initio calculations also...

Three mononuclear cobalt(II) tetranitrate complexes (A)2[Co(NO3)4] with different countercations, Ph4P+ (1), MePh3P+ (2), and Ph4As+ (3), have been synthesized studied by X-ray single-crystal diffraction, magnetic measurements, inelastic neutron scattering (INS), high-frequency high-field EPR (HF-EPR) spectroscopy, theoretical calculations. The diffraction studies reveal that the structure of cobalt anion varies countercation. 1 2 exhibit highly irregular seven-coordinate geometries, while...

Mononuclear, seven-coordinate complex [Co^II(BPA-TPA)](BF₄)₂ (BPA-TPA = pentapyidyldiamine) display field-induce slow magnetic relaxation, thereby presenting the first report of SIMs based on 3d metal ions with a capped trigonal prismatic geometry.

The choice of axial ligands is great importance for the construction high-performance Dy-based single-molecule magnets (SMMs). Here, combining Ph3SiO- (anion triphenylsilanol) and 2,6-dichloro-4-nitro-PhO- (the anion 2,6-dichloro-4-nitrophenol) with a neutral macrocyclic ligand 2,14-dimethyl-3,6,10,13,19-pentaazabicyclo[13.3.1]nonadeca-1(19),2,13,15,17-pentaene (L2N5) generates two new pentagonal bipyramidal Dy(III) complexes [DyIII(L2N5) (X)2](BPh4) (X = Ph3SiO-, 1;...

A simple hydrothermal route was used to synthesize a nanowire network of Zn(OH)F at 120 °C, which transformed into porous ZnO with the same morphologies by calcination in air. These as-prepared products were characterized X-ray diffraction, transmission electron microscopy, scanning and photoelectron spectroscopy measurements. Luminescent photocatalytic properties also studied. exhibited strong broad emission band centered 417 nm. Porous networks found decompose organic dyes photocatalytically.

A solvothermal route to MnWO4 nanoparticles and nanorods has been developed. These nano-size products have characterized by X-ray diffraction transmission electron microscopy. The pressure, pH temperature of the reaction systems were found play important roles in determining morphologies nanocrystalline products. Homologous surfactants also used control formation nanocrystals. a crucial role route, there is apparently relationship between molecular weight added homologous aspect ratio...

In the present paper, we report successful synthesis of FeMoO4 hierarchical hollow spheres with 1.0 µm in diameter via a simple, rapid and reliable microwave-assisted solution-phase approach. The phases morphologies products have been characterized by powder X-ray diffraction (XRD), energy dispersive spectrometry (EDS), transmission electron microscopy (TEM), scanning (SEM). Some factors influencing morphology final product investigated. These experiments indicate that self-assembly...