This compound is an unprecedented two dimensional network consisting of a tetranuclear cubic [Dy4(OH)4]8 + secondary building unit (SBU) and tridentate pytza via the pyridine-N and the carboxylate group in a μ1,3-COO syn-syn bridging mode.
Compound 1 shows a mononuclear structure whereas compound 2 is an unprecedented two dimensional network composed of tridentate 4-pytza via the pyridine-N and the carboxylate group in a μ1,3-COO bridging mode and a tetranuclear cubane-shaped [Tb4(OH)4]8+ cluster secondary building unit (SBU).
Compound 1 crystallizes in the polar space group Pc and is made up of [CrMo6H6O24]3− polyoxoanions covalently linked by cadmium cations to yield an unprecedented one-dimensional chain, which represents the first example of one-dimensional assemblies based on Anderson-type POMs and cadmium cations.
Self-assembly of a flexible tricarboxylate ligand (H3L) and cobalt salt under hydrothermal conditions yields an unprecedented two-dimensional (2D) nanoscaled quadruple-layer networks [Co4 HL 3 μ3-OH 2 [Co4 HL 3 μ3-OH 2 H2O 2 ]·5H2Ocarboxyl-phenyl)-(4-(2′-carboxyl-phenyl)-benzyl)ether).
Structural analysis indicates that every [α-BW12O40]5− polyanion interconnects with three adjacent [Nd dmf 4(H2O)]3+ subunits by means of W O Nd bridges, meanwhile, every [Nd dmf 4(H2O)]3+ building block is surrounded by three neighboring [α-BW12O40]5− polyanions by making use of which an unprecedented two-dimensional extended network structure can be constructed.
X-ray analysis reveals that complex 1 possesses an unprecedented two-dimensional topology structure constructed from three-ply-like layers, complex 2 is an infinite 2D undulating network, complex 3 is a 1D zigzag chain and complex 4 belongs to a 1D chain.
We have developed a method combining live fluorescence imaging with automated volume EM to produce unprecedented three-dimensional structural and functional detail of a transient biological process in vivo.
While optical coherence tomography (OCT), combined with adaptive optics (AO), has permitted unprecedented three-dimensional resolution in the living retina, it has not generally been able to measure these OS dynamics, whose scale is smaller than OCT's axial resolution of a few microns.
The hydrothermal reaction of Zn(NO3 2 · 6H2O, bpp and NH4VO3 in water at 140 °C for 80 h yields an unprecedented chiral three-dimensional vanadium oxide complex, [Zn(bpp V2O6] (1).
