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A series of zinc aryloxides, [Zn4(sal‐Me)8]⋅2.5(C7H8) (1), [Zn4(sal‐Me)8]⋅CH2Cl2 (2), [Zn4(μ3‐OR)2(sal‐R)6] (3) (for R=Me (0.51), Et (0.49)), [Zn4(μ3‐OMe)4(sal‐Me)4(HOMe)4] (4), [Zn(sal‐Me)2(py)2]⋅THF (5), {[Zn(sal‐Me)2(tmbpy)] ⋅ 2(C6H5CH3)}n (6), [Zn2(sal‐Me)2(THF)2Cl2] ⋅ 0.5(C6H5CH3) (7), and [Zn4(μ3‐OMe)2(sal‐Me)4Cl2] (8) (Hsal‐Me=methyl salicylate, py=pyridine, tmbpy=4,4′‐trimethylenedipyridine) were obtained that have different nuclearities and central core topologies and contain ligands of different basicity and coordination abilities. [ABSTRACT FROM AUTHOR]

Phosphate-based materials are of great interest in the design of solid electrolytes for sodium ion batteries. The synthesis, crystal structure and ionic conductivity of tetrasodium hypodiphosphate are reported. The nanocrystalline anhydrous material, Na4(P2O6), was obtained by dehydration and its crystal structure was determined with 3D electron and X-ray powder diffraction. The effect of chemical modification on the structure and conductivity of the title compound in comparison with its analogues is revealed. [ABSTRACT FROM AUTHOR]

The linking of two dinuclear macrocyclic units of large triphenolic hexaazamine by two carbonate anions results in the formation of dimeric tetranuclear Sm(III), Eu(III) and Gd(III) complexes. These complexes were initially obtained serendipitously by fixation of atmospheric carbon dioxide and subsequently obtained in a rational way by the application of carbonate salts. The X-ray crystal structures of these isomorphic complexes show highly folded conformation of the macrocycle. This type of conformation is also confirmed by 2D NMR spectra of the Sm(III) complex. The ESI-MS and NMR spectra reveal also that these carbonate complexes exist in solution in two different forms that are in a concentration-dependent dynamic equilibrium. [ABSTRACT FROM AUTHOR]

Organic–inorganic salts and ionic co-crystals of hypodiphosphoric acid (H4P2O6, PP) with 3-aminopyridine (3ap) have been synthesized and characterized by X-ray diffraction (single-crystal and micro-powder), thermogravimetry and Fourier-transform infrared spectroscopy. (3apH)2(H2P2O6)·0.5H4P2O6·H2O (1), (3apH)6(H2P2O6)(P2O6)·2H2O (3) and (3apH2)(H2P2O6) (5) were obtained in crystalline form in typical solution-crystallization processes, using the molar ratio of PP acid (water solution) : 3ap (solid) 1 : 1, 1 : 3 or 2 : 1, respectively. Compounds (3apH)4(H3P2O6)2(H2P2O6) (2) and (3apH)2(H2P2O6)·3ap (4) were formed during dehydration processes of (1) and (3), respectively, which took place as destructive transformations. Compound (2) was also obtained by crystallization from a molten salt. The removal of water results in rearrangement of the crystal architecture (both the hypodiphosphate substructure and the organic part), and formation of polar structure in (4). [ABSTRACT FROM AUTHOR]

Almost all existing luminescent thermometers rely on the temperaturedependent processes such as multi-phonon relaxation and phonon-assisted energy transfers, thermal population, or coupling between energy levels of ground and excited states of luminescent species (lanthanides, transition metals, quantum dots, fluorescent molecules, etc.). Although such phenomena are in principle suitable for straightforward calibration, aiming to offer high temperature sensitivity, high temperature resolution and the widest possible temperature sensitivity range, their performance is often dependent on the excitation intensity or sample dispersive properties and often suffers from insufficient brightness, which further becomes dimmer at increased temperatures. Exploiting temperature-dependent continuous phase transitions that modify the same near-infrared (NIR) emission band under the same NIR excitation wavelength may provide an alternative reading method for temperature sensing. Here, such a new principle of luminescent nano-thermometry (LNT) using a Nd3+ doped nanocrystalline LiYO2 matrix is studied, significant sensitivities of up to 6%/K are achieved, and other issues found in conventional LNT are circumvented. Due to the hysteresis found in this class of LNT, they may find applications in studies of temperature gradients and can be integrated with modern nanophotonic devices. [ABSTRACT FROM AUTHOR]