نتایج جستجو برای: lanthanide
تعداد نتایج: 4165 فیلتر نتایج به سال:
Efficient lanthanide (Ln) luminescent probes require good ligand-to-metal energy transfer and high aqueous stability. A family of ligands based on 2-hydroxyisophthalamide chelating units is reported. These form highly stable, eight-coordinate Ln complexes. Several of these (Ln = Sm, Eu, Tb, Dy) emit in the visible region with good ligand-to-lanthanide energy transfer. The absolute quantum yield...
A family of six dinuclear lanthanide complexes have been obtained via in situ hydrothermal synthesis with lanthanide ions as catalyst. These six complexes are formulated as [Ln(2)(3-Htzba)(2)(3-tzba)(2)(H(2)O)(8)]·4H(2)O [Ln = Gd, 1; Dy, 2; Eu, 3; Tb, 4; Sm, 5; Er, 6; 3-H(2)tzba = 3-(1H-tetrazol-5-yl)benzoic acid]. The magnetic investigations show that complex 2 behaves as a single-molecule mag...
This work reports the thermodynamic characterizations of organometallic species as a vehicle for the rapid separation of volatile nuclear fission products via gas chromatography due to differences in adsorption enthalpy. Because adsorption and sublimation thermodynamics are linearly correlated, there is considerable motivation to determine sublimation enthalpies. A method of isothermal thermogr...
The combination of an optical microscope and a luminescent probe plays a pivotal role in biological imaging because it allows for probing subcellular structures. However, the optical resolutions are largely constrained by Abbe's diffraction limit, and the common dye probes often suffer from photobleaching. Here we present a new method for subwavelength imaging by combining lanthanide-doped upco...
A novel infinite lanthanide hydroxide ribbon was successfully assembled in a 2D network, which exhibits slow relaxation of the magnetization at low temperature.
The apparent molar compressibilities φK of aqueous 3-1 electrolyte solutions have been determined from ultrasound velocity and density measurements at 20 C. The values of φK have been extrapolated to infinite dilution, and the total hydration numbers Zo for investigated solutions were estimated from the data φK. A correlation between the hydration and the atomic number of elements of the Period...
Hexametallic chromium(III) chains can act as fluoride donor ligands to lanthanide ions giving {(Cr(6))Ln(x)}(n) complexes; preliminary spectroscopic studies are reported.
The judicious tuning of simple thermodynamic parameters controlling dimerization processes in solution induces a rational switch between smectic and nematic organizations in thermotropic lanthanide-containing liquid crystals.
Discriminating between lanthanide ions: self-assembly of heterodimetallic triple-stranded helicates.
A bis-terdentate segmental ligand has been designed which self-assembles with lanthanide ions of different size to yield heterodimetallic triple-stranded helicates.
The weak fluorescence of lanthanide/nucleotide coordination polymers was greatly enhanced by Ag(+) in aqueous solution, which has been used for highly sensitive sensing of Ag(+).
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