Materials Literature
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Abstract Rare‐earth(III) complexes of the general formula [RE{(Hsal) 3 tren} 2 ](CF 3 SO 3 ) 3 · n CH 3 CN, where RE is Eu ( 1 ), Gd ( 2 ), and Tb ( 3 ), and (Hsal) 3 tren is tris[2‐(salicylideneimino)ethyl]amine, have been synthesized and structurally characterized. X‐ray crystallographic studies show that the rare‐e…
We recorded angle-dependent XANES (AXANES) spectra at the potassium K-edge for three compositionally intermediate polylithionite-siderophyllite trioctahedral 1M-micas using polarized synchrotron radiation. We evaluated the experimental spectra for both their in-plane and out-of-plane component fractions of the electri…
We apply density functional theory with empirical Hubbard U parameter (DFT+U) to study Mn-based molecular magnets. Unlike most previous DFT+U studies, we calibrate U parameters for both metal and ligand atoms using five binuclear manganese complexes as the benchmarks. We note delocalization of the spin density onto ac…
Polarization and electromagnetic properties in artificial multiple helix structures are investigated. It was found that on increasing the numbers of helical backbones, resulting in higher values of chirality index, a unique beam splitting behavior is observed. These split left and right circularly polarized waves prov…
Chabazite-Mg, (Mg 0.67 K 0.52 Ca 0.48 Na 0.08 Sr 0.03 ) Σ1.78 [(Al 3.16 Si 8.89 ) Σ12.05 O 24 ]·9.68H 2 O, is a new zeolite species of the chabazite series, occurring in basalts of the Karikás-tető area of Prága Hill, Veszprém County, Balaton Highland, Transdanubia, West Hungary. It crystallizes as single, colorless r…
The connection between photoluminescence (PL) intermittency and excited-state kinetics is explored for 2',7'-dichlorofluorescein (DCF) isolated in crystals of potassium acid phthalate (KAP) using time-tagged, time-resolved, time-correlated single-photon counting (T3R-TCSPC). In this technique, PL intermittency or "bli…
Fünffach verzwillingte, Seestern-förmige Rh-Nanokristalle mit fünf Armen (siehe TEM-Bild) wurden in hohen Ausbeuten ausgehend von [{Rh(CF3COO)2}2] synthetisiert. Die Synthese vermeidet oxidative Ätzvorgänge, und die frisch hergestellten Rh-Nanokristalle eignen sich sehr gut als SERS-Substrate.
Abstract: The present work reports about an experimental study investigatingthe influence of air convection and of ambient temperature around a half-floatingzone on the transition behavior from steady to oscillatory flow, i.e. the influenceon the critical Marangoni number (Ma cr ). Increase of heat loss from the free sur-…
In a recent Letter [J. K. Dong et al., Phys. Rev. Lett. 104, 087005 (2010)], Dong \textit{et al}. have observed a $T^{1.5}$ dependence of resistivity $\rho$ in KFe$_2$As$_2$ at the upper critical field $B_{c2}$ = 5 T parallel to the c axis and have suggested the existence of a field-induced quantum critical point (QCP…
The change with temperature of IR absorption bands in OH in muscovite was studied using unpolarized in-situ high-temperature infrared microspectroscopy. The molar absorption coefficient ε at 3628 cm-1 for OH in muscovite at room temperature (20 °C) has been determined to be 127 ± 6 L/mol·cm. Using the orientation fact…
AgBr nanowires within single-wall carbon nanotubes (SWCNTs) are extremely stable even under UV laser light illumination. The structure of AgBr nanowires within SWCNTs, which was confirmed by transmission electron microscopy, inhibits photoreduction to Ag by preventing the migration of Br atoms. Reduction of AgBr nanow…
Ab initio calculations of relativistic core-level electron-energy-loss spectra and x-ray absorption spectra in periodic systems are carried out using an impurity Green's function formalism without the need for a supercell. The approach is based on a hybrid scheme incorporating a reciprocal space calculation of the mul…
A rapid and sensitive indirect competitive fluorescence-linked immunosorbent assay (cFLISA) method based on quantum dots as the fluorescence label coupled with secondary antibody (Ab(2)) for the detection of chlorpyrifos in drinking water has been developed. The cFLISA method allowed for chlorpyrifos determination in…
O propósito deste estudo é investigar a biodegradação de filmes de PHB, PP e blenda de PP/PHB (1:1) por microrganismos de águas de rio poluído que recebeu vários tipos de descartes, inclusive de refinaria de petróleo. Os filmes poliméricos foram obtidos por fusão do pó do material a 175 ºC, prensados a 71,3 kgf.cm-2 e…
Abstract Lanthanide(III) complexes with 10‐benzyl‐1,4,7‐tris(carboxymethyl)‐1,4,7,10‐tetraazacyclododecane (H 3 L ) have been investigated as model compounds of N ‐alkylated Ln III –do3a complexes (H 3 do3a = 1,4,7,10‐tetraazacyclododecane‐1,4,7‐triacetic acid) with potential application in molecular imaging. The X‐ra…
The chemistry of oxygen, hydrogen, water, and other species containing both oxygen and hydrogen atoms on the anatase TiO(2) (001) surface is investigated by DFT. The adsorption energy of atoms and radicals depends appreciably on the position and mode of adsorption, and on the coverage. Molecular hydrogen and oxygen in…
This work presents a novel approach to describing spectral properties of graphene layers with well-defined edges. We microscopically analyze the boundary problem for the continuous Bogoliubov-de Gennes-Dirac equations and derive the Green functions for normal and superconducting graphene layers. Importing the idea use…
Two new antimonian garnets-bitikleite-(SnAl) Ca 3 SbSnAl 3 O 12 and bitikleite-(ZrFe) Ca 3 SbZrFe 3 O 12 -have been found as accessory minerals in the cuspidine zone of high-temperature skarns in a carbonate-silicate xenolith at the contact with ignimbrites within the Upper Chegem structure in the Northern Caucasus, K…
New discoveries of kuksite, Pb 3 Zn 3 Te 6+ P 2 O 14 , from the Black Pine mine, Montana, and Blue Bell claims, California, have enabled a detailed crystal-chemical study of the mineral to be undertaken. Single-crystal X-ray structure refinements of the structure indicate that it is isostructural with dugganite, Pb 3…
Here we present a parametrized tight-binding (TB) model to calculate the band structure of single-wall carbon nanotubes (SWNTs). On the basis of ab initio calculations we fit the band structure of nanotubes of different radii with results obtained with an orthogonal TB model to third neighbors, which includes the effe…